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New 540 Indy bullet going on the Dyno, any guesses???
#507936
10/26/09 02:24 PM
10/26/09 02:24 PM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
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Well the new motor is finally going on the Dyno to break in and tune the Terminator Alky injection system for max (safe) power!!!  Should run it tonight or tommorow night. Anyone care to guess??? Bottom end: Indy max low deck Aluminum block. 540ci w/ 4.5 bore and 4.25" stroke. K-1 Crank, R&R 6.635" billet Alum rods w/ 2.20 rod journals. Custom Ross domed 15:1 compression pistons w/ 1.205" comp height. Charlies Alum oil pan w/ milodon dual line swinging pick up and Melling HV pump. Top end: 2100cfm Ron's Terminator Alcohol Injection on a low deck Indy manifold, 440-1 Alum heads 345cc intake volume CNC ported by MCH, 382 cfm @ .800" Custom comp roller 286/288 dur @ .050", .782"/.765" lift, 111 lsa installed at 107 icl. Headers: TTi 2" - 2 1/8" in chassis step headers, w/ evac hoses. I am hoping for 850 HP  Any guesses or advice for the dyno session??? Cheers, Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: New 540 Indy bullet going on the Dyno, any guesses???
[Re: cudabin]
#507938
10/26/09 02:47 PM
10/26/09 02:47 PM
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Joined: Jan 2003
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Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I have a very similar combo, differnaces being tall deck, megablock at 528 inchs, made 847 hp . Good luck, hope you make more!
On advice, If I had it to do over I would have tested with more heat in the motor, as I wound up running it much warmer. Tested at 140 degrees, run it at 190.
Last edited by gregsdart; 10/26/09 02:50 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: New 540 Indy bullet going on the Dyno, any guesses???
[Re: gregsdart]
#507939
10/26/09 08:26 PM
10/26/09 08:26 PM
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Joined: Jan 2004
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Saskatchewan, Canada
cudabin
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Thanks guys,
No vacum pump could set me back a few HP.
Greg, I will start the pull around 160 temp by warming up on gas with my primer plus, then switch to alky for the pull. Based on your advice I will try starting at higher temp as well, although it will be tough to keep the motor warm once at the track...
Any other ideas for testing on the dyno??
thanks,
Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: New 540 Indy bullet going on the Dyno, any guesses???
[Re: cudabin]
#507940
10/26/09 09:27 PM
10/26/09 09:27 PM
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Joined: Jan 2003
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Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I use a fair amount of fuel, but haven't had too much trouble getting it up to 185 before the burnout box. with your primer plus, I bet it will be very easy. Not to mention cheap. A guy can buy a lot of 92 octane for the price of a couple of gallons of alky.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: New 540 Indy bullet going on the Dyno, any guesses???
[Re: gregsdart]
#507941
10/26/09 09:30 PM
10/26/09 09:30 PM
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Anonymous
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Anonymous
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Re: New 540 Indy bullet going on the Dyno, any guesses???
[Re: gregsdart]
#507942
10/26/09 09:33 PM
10/26/09 09:33 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Thats almost identical setup I run. My combo featured a 4.5 stroke and 4.44 bore..Same heads, same compression, same induction..Same cam, bla bla bla. I never dyno'd my engine, but I can speak of track times. That engine went mid to upper 7's in the 1/4 mile, 144 mph in the 8th mile in the heat with a 1.06-1.07 in the short times in a 2100 lbs car. IMO the extra stroke I have on you isnt worth much if any at all....Matter of fact I think you have a better combo....maybe...track times is what counts...we dont race dyno's LOL.. Nice combo 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: New 540 Indy bullet going on the Dyno, any guesses?
[Re: Diablo]
#507944
10/26/09 11:19 PM
10/26/09 11:19 PM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
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Thanks for the input guys,
I went only 4.25" stroke in order to run a few more rpm's before the 440-1 heads peaked out... that allows more rear gear and torque multiplication.
Also since it only has 10.5W -31 slicks and 32" ladder bars, i did not want to much low end torque. Alky makes good torque anyways right?
Somewhere between 850 and 875 HP would be great but like said , we don't race dynos!
I really just wanted to get the baseline tune from the dyno very close and then eliminate guesses next spring.
Cheers,
Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: New 540 Indy bullet going on the Dyno, any guesses?
[Re: cudabin]
#507946
10/26/09 11:55 PM
10/26/09 11:55 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Here was my tune for 0 1/2 Rons pump... 38 nozzles, and a 86-90 bypass pill.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: New 540 Indy bullet going on the Dyno, any guesses?
[Re: Bob_Coomer]
#507947
10/27/09 12:08 AM
10/27/09 12:08 AM
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Joined: Jan 2004
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Saskatchewan, Canada
cudabin
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Thanks Greg, It should like a shift point of around 7,200 rpm then. Right? Bob, that is exactly where i am starting the tune! o - 1/2 black pump, 38 nzs, and 87 pill to start... Thanks for the input. Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: New 540 Indy bullet going on the Dyno, any guesses?
[Re: cudabin]
#507948
10/27/09 12:37 AM
10/27/09 12:37 AM
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Joined: Feb 2006
Posts: 698
Alberta Canada
Edge
mopar
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mopar
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Alberta Canada
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845 hp 6750 rpm torque peak around 5300 RPM, hope the session goes well for you
76 Duster
work in progress
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Re: New 540 Indy bullet going on the Dyno, any guesses?
[Re: cudabin]
#507949
10/27/09 07:53 AM
10/27/09 07:53 AM
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Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Quote:
Thanks Greg,
It should like a shift point of around 7,200 rpm then. Right?
Bob, that is exactly where i am starting the tune! o - 1/2 black pump, 38 nzs, and 87 pill to start...
Thanks for the input.
Arnie
Great place to start!
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: gregsdart]
#507950
03/26/10 06:46 PM
03/26/10 06:46 PM
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Joined: Jan 2004
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Saskatchewan, Canada
cudabin
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Well we made a couple of pulls on the 540 and it made 859HP at 6,800rpm and 726ft-ib at 5,500rpm. Problem was there was a lot of blowby, enough to pop the breather out of the valve cover and paint the wall with fresh oil...  Switched over to a gas carb and it made 820HP, but with no blowby. There was no evac lines on the dyno headers, so it was just straight breathers, so they have now installed some evac check valves in the adapters from the headers to the dyno room exhaust and while running a different motor they measured 5 - 6 inches vacuum. We will try it again to see if that helps reduce the blowby and maybe even pick up a few more HP Also the tune-up was using 37 nozzles and a 96 (large) bypass pill, so we are going to try a set of 36 nozzles and a smaller bypass which should provide more pressure and better atomization of the fuel which can also reduce blowby. I know a vacuum pump would help even more, but i would like to try and run it with just my header evac tubes this season, and if it hooks and books, i can always add a pump for 2011... Any ideas if the evac and smaller nozzles will help??? Cheers, Arnie
Last edited by cudabin; 03/26/10 08:08 PM.
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: cudabin]
#507953
03/26/10 09:27 PM
03/26/10 09:27 PM
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
blownzoom440
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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on gas my engine did not like a over rich mix and would blow the breathers off so i would say lean it a bit on alky.too much timing did this also.
Last edited by METAL STORM; 03/26/10 09:29 PM.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: arc]
#507956
03/26/10 10:33 PM
03/26/10 10:33 PM
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Joined: Jan 2004
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Saskatchewan, Canada
cudabin
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No doubt a vacuum pump would pick it up a notch, but I will see what the evac and smaller nozzles do first, then we may try a pump... Wild Bill, I am amazed how much higher in rpm you found peak HP. Mine peaked at 6,800 and yours went to 7,400? Also i have more cam and bigger 345cc heads. I guess the extra cubes pull the power peak down a lot in my case? I can hardly wait for the next pull Cheers, Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: 440Jim]
#507959
03/27/10 01:30 PM
03/27/10 01:30 PM
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Saskatchewan, Canada
cudabin
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Hey hardcore B, The lifters are Brian's from IMM special roller lifters with offsets on the intake, and oiling to the bearings. Lifter bores were bronze bushed with oiling holes to push rod oil. Comp 3/8" .080 wall push rods. Jesel pro rockers and K-motion K1000H springs. I need to check the installed height and pressures and will post later. Jim, they bypassed their normal gas fuel system to measure bsfc, and used a FAST sensor. The A/F was 5.5 - 5.8 throughout the pull (Alcohol scale) Water temp started at 156 at 5,000 rpm and was up to 161 at 7,100 rpm. Oil temp was not shown on the sheet i got. I will ask them to fill all of that onto the sheet for the next pull. since they were using 37 nozzles with a 96 pill, i am very interested to see what the header evac and better fuel atomization with the 36 nozzles will do! Cheers, Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: cudabin]
#507960
03/27/10 01:47 PM
03/27/10 01:47 PM
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Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger
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Hey Arnie, Great #'s! All I can say about vac pumps is, other guys with similar builds are all using them. There will be a nice match-up concerning cudas out there,,,  Make sure you trust "the guy" doing the tuning...He knows his stuff! And when he's done, hopefully he'll have time to freshen up some Charger junk...  Which brings me to another question... Do you still have a regular transport running from here to there?  I need to get those heads down there, which I should have done off the bat..   [edit]Oops.. didn't realize you're not in Regina.. 
Last edited by RemCharger; 03/27/10 03:18 PM.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: cudabin]
#507961
03/27/10 01:53 PM
03/27/10 01:53 PM
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Joined: Nov 2003
Posts: 10,384
Upstate NY
Bigcube
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Quote:
No doubt a vacuum pump would pick it up a notch, but I will see what the evac and smaller nozzles do first, then we may try a pump...
Wild Bill, I am amazed how much higher in rpm you found peak HP. Mine peaked at 6,800 and yours went to 7,400? Also i have more cam and bigger 345cc heads. I guess the extra cubes pull the power peak down a lot in my case?
I can hardly wait for the next pull
Cheers,
Arnie
Not sure why yours peaked lower then mine. I run a 4.5" stroke, little less head flow but about the same CC. Mine seemed to have 2 peak numbers. One at 6800 (851.6) and the other at 7200(852.6). Cam in mine is 753I/.730E, 281I/288E, 112 lobe sep.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: cudabin]
#507962
03/27/10 01:56 PM
03/27/10 01:56 PM
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Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
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"Jesel pro rockers and K-motion K1000H springs."
I broke a lot of stuff running those K1000H springs. Jesel rocker bearings (knocked the needle cages out)broken springs, roller lifters. Went to comp 947 springs and promtly picked up .11 in the 1/8th, absolutely no other changes.
I was never quite sure if it was the springs or the cam I had till I talked to the folks at Manton pushrods. Terry (owner) put me in touch with his dad, who is a spring engineer. He had nothing good to say about those springs.
He stated the cycle rate on the Comp 947s was such that the bad spots are 4,000 and 8,000 rpm. I never run long at either spot, so they work for me.
There are other springs out there with much better dynamics, which might even fit your retainers. I bet you two boxes of K1000h springs you will pick up at least 20 hp!
If I win, you can keep em. Buy me a Coke when we meet!
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: gregsdart]
#507963
03/27/10 04:34 PM
03/27/10 04:34 PM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
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I have a 4.50 bore 4.15 stroke with twin Terminators,572-13 heads. With a Cam Motion 283/292-799/752. With 38 nozzels and a #89 pill in the return it heated up like it was on gas. Put 39 nozzels and a #80 pill in the return run much better. In a few weeks may start with what I had last year and try some 40 nozzels.
Don't be afraid to riched it up some.
What timing are you running on yours? I run 35 on mine,plan on moving the timing some to see if it will pick up(on the track). Not sure if I should retard or advance first. Now would be a good time to try some timing changes with it on the Dyno.
Last edited by MRMOPAR570; 03/27/10 04:35 PM.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: MRMOPAR622]
#507964
03/27/10 05:12 PM
03/27/10 05:12 PM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
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Hey Greg, I will ask the engine builder about those K1000H springs. I had some comp springs in the 470 and was breaking them due to some wierd harmonics...
MRMopar570, As for nozzle size, we are going to try it with the 37's still in it and using the header evac which should pull 5 - 6" vacuum. If blowby is reduced, we may be able to reduce the pill size and keep the 37's ??
But so far it seems like it does not want more fuel. Timing is at 34 degrees. We can play with that once the blowby is reduced.
Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: cudabin]
#507965
03/27/10 06:56 PM
03/27/10 06:56 PM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
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cudabin, on another post a week or two ago someone raised thier timing up to 40 degrees and pick up power. Back in the 80's we used to run 38-42 degrees. The only reason I changed back was that I was told to run 35 degrees. I guess the 38-42 is old school,but if it works. The good thing for you is the dyno will tell you if it works.
Greg, I wish I had seen this post about 3 weeks ago. I have just brought another set of K1000H valve springs to replace my old set of K1000H springs.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: MRMOPAR622]
#507966
03/28/10 09:03 AM
03/28/10 09:03 AM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
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Sweet Home Alabama
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cudabin, While your engine is on the dyno it might would be helpful if you could get about 5 gals. of VP M5 to try. I have been told you can use the same nozzels and go down 4 sizes on the pill in the return(richer)and pick up about .15 in the 1/8 mile by a man who is really sharp on running Terminators on alcohol.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: MRMOPAR622]
#507967
03/28/10 10:46 AM
03/28/10 10:46 AM
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Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
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"Greg, I wish I had seen this post about 3 weeks ago. I have just brought another set of K1000H valve springs to replace my old set of K1000H springs. "
Feeling bad about having two boxes of those, I asked if there was a use for them in another setup. I was told no. The design has flaws. Sorry for the downer, but after my experience, I understand how powerful advertising has been on me. See something enough, and a guy will believe it is OK.
I wound up chasing my tail through two sets of springs, a bunch of very expensive jesel rockers to replace broken parts, and two sets of rollerlifters. I was fanatical about checking lash. All this in less than 100 passes.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: UPDATED 540 Indy bullet now on the Dyno, UPDATED !
[Re: cudabin]
#507968
03/28/10 11:05 AM
03/28/10 11:05 AM
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Joined: Jan 2003
Posts: 16,928
NC
440Jim
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Quote:
Jim, they bypassed their normal gas fuel system to measure bsfc, and used a FAST sensor. The A/F was 5.5 - 5.8 throughout the pull (Alcohol scale)
With the stoichiometric ratio for Methanol at 6.4, that is a ratio (Lambda) of .859-.906
I think methanol might like richer than that. But I am no expert on that. The few months I ran methanol, I was in the range of Lambda .83-.84, ie only slightly richer than your numbers.
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: 440Jim]
#507969
04/21/10 06:40 PM
04/21/10 06:40 PM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
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We changed cams adding some exhaust duration up to 294 from 288. Also added a vacuum pump with a small crank pulley which built 5 inches vac, With the smaller 36 nozzles and an 86 pill at 36 degrees timing it made 895HP at 6,900 rpm. The vacuum pump and cam change added 35HP I can't wait to get an ET slip to back up these numbers  In reality though we don't get to race at sea level, so the HP will be down a bit at 4,000 feet DA. Wonder how much that will hurt Cheers, Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: B1HEAD_USER]
#507972
04/22/10 01:16 AM
04/22/10 01:16 AM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
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The cam did not reduce blowby much, but did contribute to the HP hanging on longer after the peak, and the peak moved up from 6,800 to 6,900 rpm. That will help a lot! Without the Vac pump, we reduced blowby somewhat with the smaller nozzles, but HP went down as well from 859 down to 810Hp. For what ever reason, this motor seems to need the Vac pump to seal the rings. I guess Alum block is part of the problem?  Hey Greg, Thanks for the prediction. The car should weigh 2,700 - 2,750#'s so an 8.90 will be the goal!!! I appreciated all your advice and help, and tried to follow your direction Cheers, Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: cudabin]
#507973
04/22/10 11:15 AM
04/22/10 11:15 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Watch the plug gap on that engine...You cant run a .045-.050 gap on Alky. I had changed plugs one week and the next outing I had lost .05 and several MPH in near identical conditions. I had changed only a few things, and spark plugs was one of them.. After beating my head silly, I pulled the plugs and gapped them to .030-.035..The car picked up the next pass and bested my best pass.  If its tuned correctly the engine should gain about 8-10 deg from launch to the stripe. If it doesnt gain any temp, its too fat, back it off one pill size, or 4 numbers. retest. You gotta look fast on the other end, a few moments afer you let off the fuel the engine will cool down pretty fast.  I never dyno'd the wedge, but looking at my notes the last few races it had 36 nozzle and a 90 bypass pill. Use the smaller nozzle and tune with the pills first, then fine tune with the nozzles. Sounds like your close. Hope this helps
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: Bob_Coomer]
#507974
04/22/10 11:23 AM
04/22/10 11:23 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Rock Springs
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Also the tune on the barrel valve arm makes a huge diff. I tried this and that...I ended up setting my barrel valve with a leak down tester and feeler gauge. I cant recall what numbers I finally arrived at but about 24% leak down at idle and about .018-.020 or so throttle blade clearance.. for a base lengthen the arm until you have a hesitation when you snap the throttle open. now shorten/fatten the rod until the hesitation goes away. Give it two more flats on the rod. Remember also if you adjust the idle screw it changes everything.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: cudabin]
#507975
04/22/10 11:59 AM
04/22/10 11:59 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
The cam did not reduce blowby much, but did contribute to the HP hanging on longer after the peak, and the peak moved up from 6,800 to 6,900 rpm. That will help a lot!
Without the Vac pump, we reduced blowby somewhat with the smaller nozzles, but HP went down as well from 859 down to 810Hp.
For what ever reason, this motor seems to need the Vac pump to seal the rings. I guess Alum block is part of the problem?
Hey Greg,
Thanks for the prediction. The car should weigh 2,700 - 2,750#'s so an 8.90 will be the goal!!!
I appreciated all your advice and help, and tried to follow your direction
Cheers,
Arnie
You will never get the rings to seal on an aluminum block as well as on an iron one-especially if the block is not filled.
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: Bob_Coomer]
#507976
04/22/10 03:04 PM
04/22/10 03:04 PM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
OP
super stock
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OP
super stock
Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
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Thanks for the tune up info Bob C! I have the plugs at .035" It was at 161 degrees at the start of the pull at 4,900 rpm and climbed to 166 degrees (+5) at the end of the pull at 7,200. This gave a 12.5 A/F ratio on the gas scale. The actual dyno elevation is only 918 feet and DA around 1200 - 1400 feet. I race around 3,000 - 4,000 feet DA so we wanted to not be fat on the dyno as it will be richer when I race. I will tune for max mph and then check the temp gain in the quarter at my elevation and go from there, but at least it will be in the ball park. We could have cranked up the vacuum and made a pull with the engine colder to try and break 900HP, but as everyone says "you don't race dynos" Bob R, They say Alum blocks seal better after the first rebuild, but i am just going to go to a vacuum pump and not worry about it. I did not use low tension oil rings, so when i rebuild i will try them for a few more HP Cheers, Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: cudabin]
#507977
04/25/10 11:31 PM
04/25/10 11:31 PM
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Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
cudabin
OP
super stock
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OP
super stock
Joined: Jan 2004
Posts: 903
Saskatchewan, Canada
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Anyone know how much HP the low tension oil rings along with 10 - 12 inches from the Vacuum pump would add to the motor?
Also any recommendations on how much vacuum to set it for? I have heard you don't want to exceed 15 inches...
Cheers,
Arnie
67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...)
70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.
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Re: UPDATE #2 540 Indy bullet back on the Dyno !
[Re: cudabin]
#507978
04/25/10 11:44 PM
04/25/10 11:44 PM
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Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
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On my motor, i saw 12 ft lbs torque difference for low tension rings Vs standard after assembly, so figure maybe 15 hp? The vacuum pump is supposed to be worth about 30 hp. So if you went from 859 to 890 hp, that would be about right, just for the pump.
As for vacuum, I will shoot for a safe 10 inchs, maybe 12 tops. Previously I have had 7 inchs at best. Already have signs of lack of pin oiling, will have to check with Manley and see what they say about pin bushings, oiling and clearances.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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