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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063106
08/26/11 06:00 PM
08/26/11 06:00 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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heavy car, chassie dyno means 0 to me , so i agree with the statements as for the cam, wouldnt have went with that tpe of cam, c/l something in the 105, range , and install at 102 range , as for carb, more jetting please, i run my jets in the 80 on gas, 3800 vert not bad for the street , be fine and some racing, it will get you point a to b just fine, 391 gears be just great, i ran same in my rr for 12 years. TAKE IT TO THE TRACK, take some extra jets, timming light, and that other carb, really dont thing much in changing it , but it may be set up diffrently, so it may work a little better for tuning purposes, make hit without doing anything. then make a change, timming would be good start off, heavy car, 34-36 deg , then change carb, take a hit, so on, just dont make several changes , because you could lose what trying to gain,   
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Re: dyno results... not happy diagnosis please
[Re: dennismopar73]
#1063107
08/26/11 08:34 PM
08/26/11 08:34 PM
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Joined: Jul 2004
Posts: 4,732
Watertown, WI
MikeyT
OP
master
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OP
master
Joined: Jul 2004
Posts: 4,732
Watertown, WI
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Again thank you all for your support. I guess nexct thing is to bring it to the track and dial it in with timing light and jet.
After this who thinks i should go and degree that cam to 105 LSA?
MIke
1969 Dodge Dart Swinger
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063108
08/26/11 09:07 PM
08/26/11 09:07 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Hi guys
I was excited last week took the car to the dyno to see what result happened from my changes to the car.
Ok here is car last year
4040 with me in it
440 40 over 9.5:1 compression ratio
440stealth heads
comp cam XE 268 degreed to 107 LSA
770 street avenger carb
street dominator intake
shorty style headers
727 2600 stall converter
3:23 gears
uncapped headers thru 2.5 inch cutouts
HP 327
Torque 404
Ok tonight
4040 with me in it
440 40 over 9.5:1 compression ratio
440stealth heads
comp cam XE 274 put in straight up at 110 LSa
750 Holley Double pumper 76/78
street dominator intake
shorty style headers
727 4200 stall converter
3:91 gears
uncapped headers thru 2.5 inch cutouts
HP 311
Torque 334! 
ok, I'm down 16 HP and 70 lb of torque!
It doesn't make sense!
The car runs beautifully, pulls strong now all the way up to 5800 rpms! It is a blast to drive. It comes out of the hole like its on fire now.
Why would I be down?
Thanks for any info
Ok for the record temp and humidity for pretty similar!
Take it away fella's
Mike
If it were mine, I would have gone with around 10.7.1 Compression with the Aluminum heads & The XE284H or 285HL.
76 jets are a bit fat on a standard 750dp. IMO, I'd start off with 72/80-82 & go from there, I ran 74/82 in my PF 750dp, of coarse yours may very.
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063111
08/27/11 12:02 AM
08/27/11 12:02 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Again thank you all for your support. I guess nexct thing is to bring it to the track and dial it in with timing light and jet.
After this who thinks i should go and degree that cam to 105 LSA?
MIke
I would advance it at least 4*
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Re: dyno results... not happy diagnosis please
[Re: MR_P_BODY]
#1063112
08/27/11 12:13 AM
08/27/11 12:13 AM
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Joined: Jul 2004
Posts: 4,732
Watertown, WI
MikeyT
OP
master
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OP
master
Joined: Jul 2004
Posts: 4,732
Watertown, WI
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Ok cool S So noob question #23567! Advancing it would be like to 106 right? Next one is for you Mr yuck! Why would you say bring 36 degrees in at 2400 verses 3000 rpms? I've always heard that 3000 was the rule of thumb, what advantages do I get by bringing it all in early and locking it there? Mike  I hope this doesn't get old, but you all are awesome!
1969 Dodge Dart Swinger
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063113
08/27/11 12:24 AM
08/27/11 12:24 AM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Advance it around 4+* from its 110. But before you do, do a compression test for a before and after comparison.
With your combo I would never install that cam at a 110 ICA. Disregard any results from the Dyno from the 2600 stall vert vs the 4200 stall vert and said combos. To many variables, even the Dyno cant figure it out.
Last edited by Sport440; 08/27/11 01:23 AM.
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063114
08/27/11 12:24 AM
08/27/11 12:24 AM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Mikey, Here's what I see. You took a smaller cam that was advanced to 107ICL out and put a longer duration cam and put it in 3* retarded (110ICL) from the smaller cam. I believe comp recommends that 274 cam be installed at 106. You likely gave up quite a bit of cylinder pressure doing this and took some "punch" out of the engine. Chassis dynos and loose converters don't play well as others have mentioned, including someone that uses one for his business if I'm not mistaken. Redegree the cam to 106ICL and jet the carb for max MPH at the track. If that means going up on each side, then do so. If it takes less jet, then do that. What other people have for jetting, take that as a rough idea. There are other factors that play into what size jet you'll end up with depending on the carb and metering blocks you have. I'd start with the box stock jetting the carb came with and start again from there. Do one change at a time as mentioned. As far as timing and where it all comes in, won't make a hill of beans difference IMO. You have a 4200 converter. As long as it's all in before that, run it! The 3000 curve should be OK. MSD distributor, run two medium springs, medium/light or two lights and NEVER run either of the heavy byatches for springs they come with! Most of all have fun with it and don't get frustrated!
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063115
08/27/11 12:28 AM
08/27/11 12:28 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Ok cool S
So noob question #23567!
Advancing it would be like to 106 right?
Next one is for you Mr yuck! Why would you say bring 36 degrees in at 2400 verses 3000 rpms? I've always heard that 3000 was the rule of thumb, what advantages do I get by bringing it all in early and locking it there?
Mike
I hope this doesn't get old, but you all are awesome!
Yes advancing it would be 106 (any number lesser than
the 110), which is your LSA.... check the P to V
clearance when you make a change like this
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063116
08/27/11 01:13 AM
08/27/11 01:13 AM
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Joined: Feb 2011
Posts: 30
Australia
Charger VJ RB
member
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member
Joined: Feb 2011
Posts: 30
Australia
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I must be way off here, but that comp cam has 110 LSA and cannot be changed unless reground. It has 106 intake CL so this = 114 exhaust? Centerline, any amount of advance or retard still comes back to 110 LSA ? There seems merit in a 105 LSA with your 4040 weight http://speedtalk.com/forum/viewtopic.php?f=1&t=938Maybe a custom cam grind to suit your combination
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Re: dyno results... not happy diagnosis please
[Re: Charger VJ RB]
#1063122
08/27/11 02:16 AM
08/27/11 02:16 AM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
Hmm still unclear  any good links for enlightenment, sorry to op.
No links needed  A cams lobe seperation angle is fixed, as it is ground in as you stated.
Performance cam installations will install the cam around a 102 to a 110 ICL. Most closer to 104 range with these Mopar cams
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Re: dyno results... not happy diagnosis please
[Re: MikeyT]
#1063124
08/27/11 09:58 AM
08/27/11 09:58 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Yes advancing it would be 106 (any number lesser than
the 110), which is your LSA.... check the P to V
clearance when you make a change like this
So is their a neat way to check p and v clearance while the head is still on the engine or do I have to pop off the head?
Mike
If you dont want to pull the valve springs on a cyl
you can do it IF you have adjustable rockers...
takes a bit of time but... starting at 10* before
TDC turn the adjuster till it touches... thats .041
per full turn... keep doing the same thing for every
degree to about 10* after TDC... write your numbers down
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Most here, understand the difference between a Fixed "LSA vs a Adjustible installed ICL.