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Re: A trip to Milan dragway for some TNT [Re: B3422W5] #2695743
09/09/19 11:37 AM
09/09/19 11:37 AM
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So. Burlington, Vt.
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fast68plymouth Offline
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I replayed the vid a few times.

Def doesn’t seem like it has enough stall, and sounded like it was legged out a bit too long in 2nd gear.

If that’s the best shift point, iiwii, but it “sounded” like you waited too long.

If you’re running it with the ex closed up, I’d def try uncorking it.

330cc is a fair amount of volume for 356cfm, although I realize some of that is the runner is length.
That’s not far from what the TF270’s or a set of EZ295’s flow, with noticeably smaller runners.

You have to need that extra volume for it to pay off........ and an 11.25:1 511 just may not need it.

As for the victors and power....... I was pretty happy with Brads std port victors on his 452.
Nearly 700hp with a (relatively) easy on parts roller cam.

I’m sure with a little more aggressive cam, an HVH super sucker/4150-4500 adapter and a decent 4500 carb it would have crested 700hp.

The ported MW versions seem to end up quite a bit bigger, but don’t flow much more.

What are the 60’ times?

Did you go over the scales?

As with every new combo, you have to start somewhere.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: A trip to Milan dragway for some TNT [Re: fast68plymouth] #2695754
09/09/19 11:59 AM
09/09/19 11:59 AM
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Oakland, MI
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dizuster Offline
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I was thinking the same thing... get the exhaust of that car before you worry too much about the ET potential.

I've seen plenty of cars where taking the exhaust off was a night and day difference, even with a known brand muffler.

Also... just thinking out loud... what's it got for an aircleaner on it? I've seen funny things happen on that end of the engine airflow too.

Re: A trip to Milan dragway for some TNT [Re: an8sec70cuda] #2695773
09/09/19 12:32 PM
09/09/19 12:32 PM
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Mt Morris Michigan
mopar dave Offline OP
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No dyno time.

Re: A trip to Milan dragway for some TNT [Re: dizuster] #2695775
09/09/19 12:37 PM
09/09/19 12:37 PM
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Mt Morris Michigan
mopar dave Offline OP
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Most runs were with an air bell, but I did run it with a 3" drop base and it ran maybe .05 slower.

Re: A trip to Milan dragway for some TNT [Re: an8sec70cuda] #2695777
09/09/19 12:39 PM
09/09/19 12:39 PM
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Mt Morris Michigan
mopar dave Offline OP
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Looks to me loser vert for sure. Flashes 5100, what would you suggest?

Re: A trip to Milan dragway for some TNT [Re: dizuster] #2695779
09/09/19 12:44 PM
09/09/19 12:44 PM
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Mt Morris Michigan
mopar dave Offline OP
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Ran the car in street trip to get a good idea of what I have here. Now I know. Exhaust is very short and computed on my pipe max program. Its 3.5" pipe with 34" lenght using extreme muffers oval straight thru design, similar to a Borla.

Re: A trip to Milan dragway for some TNT [Re: fast68plymouth] #2695783
09/09/19 12:50 PM
09/09/19 12:50 PM
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Mt Morris Michigan
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Dwayne, I scaled it last year at a cat scale , 3380 with me. The best 60 was last weekend at 1.45 with timing at 34*. You spec'd this cam on a 110, do you think something narrow would help like maybe a 108?

Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695824
09/09/19 03:32 PM
09/09/19 03:32 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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As with any street/strip car that’s trying balance the two modes of operation, it’s just a pile of compromises.

In order to improve one aspect of the operation, you have to give something from the other side.

Aside from maybe more cubes...... not usually any down sides to that other than fuel consumption.

I don’t think a different flat tappet cam would provide “much” performance improvement....... with no other changes to the combo.

It would probably be better if it was faster, and slightly smaller, and a little tighter........ and that would possibly run worse on the street with mufflers on it......... and would need pretty stout springs, which will impact reliability in street use.
But...... if that were more than about .10 I’d be surprised.

There’s always some trade off.

This is why I like to dyno the motor before installation.

If you knew it made enough power to run a 10.0 you wouldn’t mess with it. You’d concentrate on the “car”.

So far at least, it looks like you need to find 50-60hp worth of mph to get into the 10.0 zone.

My guess is, if the motor were on the dyno, the hp numbers would look better than what the ET indicates the power is.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: A trip to Milan dragway for some TNT [Re: fast68plymouth] #2695841
09/09/19 04:19 PM
09/09/19 04:19 PM
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Mt Morris Michigan
mopar dave Offline OP
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I agree with all of that. Originally when I built the engine I was happy with mid 10's, but most know how it is, you always want to go faster. So I guess I hit my goal, but now want a 10 O car that I drive on the street. As long as it idles at a traffic signal and can be driven 100 miles one way I'm happy. Weekend car only. I have no p steering or brakes. If a cam change is only a 10th it's not worth it to me and I dont want heavy spring pressures either. I use the Indy 400-3 which I believe flows way over 400cfm, do you think a smaller intake like a trick flow would help? The last part are you saying my power is locked in the vert?

Re: A trip to Milan dragway for some TNT [Re: B3422W5] #2695847
09/09/19 04:39 PM
09/09/19 04:39 PM
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Texas
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Dave: have you tried 34 degrees on the timing yet?
All the stroker bb we have taken to dyno have liked between 32 and 34 .
On the track, in the high humidity/ heat here this time of year, i will go to 35 or 36 as long as we dont lose anything.
We run pretty lean in this air- 13- 13.4 , any richer than that we lose time and mph.

If we are at 700 ft for track with a 3400ft da and sitting on 12.8 - 12.9 afr at 34 degrees of timing and off our number , i will pop it with 36 degrees to help with water grains and that pops our afr back up, usually gets us back towards are number.
Cooler weather/dryer air- our engines always like 34 degrees timing .

Just thinking with you.
Can you download your afr data and look at it for the whole run?
fwiw- I have one carb with Doms tune in it and , like you, tried a bleed change and it didnt help.
Once i got to where i could see the afr charted for the whole run- bleeds were dead not from Dom- fwiw.

Re: A trip to Milan dragway for some TNT [Re: RustyM] #2695896
09/09/19 06:14 PM
09/09/19 06:14 PM
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Mt Morris Michigan
mopar dave Offline OP
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More great info. Yes I ran 34* last weekend at another track in mine shaft air and it ran it's best pass at 10.401@130. Doms carbs are awesome.

Last edited by mopar dave; 09/10/19 07:37 AM.
Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695923
09/09/19 08:17 PM
09/09/19 08:17 PM
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central ohio
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nss guy Offline
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What rpm are you leaving the line at and shifting at? Didn't see the shift lite come on till you were at the stripe or just past it. I shift around 6200.

Re: A trip to Milan dragway for some TNT [Re: nss guy] #2695934
09/09/19 08:36 PM
09/09/19 08:36 PM
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Mt Morris Michigan
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I have tried 6600 6700 and 6800. Seems to run out at 6700. Launches better at 2500 and up. With the same vert my small block launched nice at 2000 with 60ft of 1.45. Lenny must have really tightened this vert up. It goes thru the traps at 6900 with 5.75% vert slippage.

Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695968
09/09/19 10:14 PM
09/09/19 10:14 PM
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Agree with others,the package as a whole should have plenty left in it. Running an A body at 3250lbs 520ci 11.6:1 pump gas with otb trickflow 270s solid roller with similar specs on cam from dewayne. Old fenderwell headers and 3.5 in exhaust and mufflers dumped behind driver. Ultimate 8in converter set up very tight for nitrous, 727. 3.70 rear gear on a 325/50 radial. Best pass so far with zero track tuning is 10.003 at 130.50mph on a 97 degree day at Charlotte dragway. Leaving off footbrake at 2800 and shifting at 6200.

Last edited by RRandP92; 09/09/19 10:16 PM.
Re: A trip to Milan dragway for some TNT [Re: RRandP92] #2695971
09/09/19 10:22 PM
09/09/19 10:22 PM
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Mt Morris Michigan
mopar dave Offline OP
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I should have tried short shifting it at 6000 just to see, but I think the vert could use an adjustment as well.

Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695973
09/09/19 10:26 PM
09/09/19 10:26 PM
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Mt Morris Michigan
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Next question is, how loose should it be and would it be best to have the 8" adjusted or would a loose 9.5" be better for my application?

Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695978
09/09/19 10:38 PM
09/09/19 10:38 PM
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Liverpool, NY
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SILVER67 Offline
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I think those heads went 9.70's in a 3,500 pound RoadRunner.

You and I have somewhat similar heads.
Mine are 325cc CNC 440-1 with 2.19 intake
2 to 2-1/8" TTI
505 tall deck
10.9 compression
260/268@50 585/600 sft
93 Sunoco with ethanol
Indy dual plane
1000HP
Shift at 6300/6200
Full 3" exhaust to the bumper
8" convertor
3.54 gear
9x28 M/T pro bracket radial
Flat steel hood
Scaled at 3,930

With no headwind i'm in the 10.90's at almost 123

So if Someone did the math and took 600 pounds from my car and toss in 4.10's
The i'd be in the 60's or 70's perhaps

Re: A trip to Milan dragway for some TNT [Re: SILVER67] #2695983
09/09/19 10:58 PM
09/09/19 10:58 PM
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Mt Morris Michigan
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Yes, you know the guy that had these? I bought them from Todd at compititionwedgeengines and he did say they were running 9.50's or 9.70's on a Roadrunner. Maybe someone can do the math. Would like to know the rest of that guys combo.

Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695993
09/09/19 11:22 PM
09/09/19 11:22 PM
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Posts: 156
michigan
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michigan
Hey, I saw myself in the video, lol. I wish I would have saw you out there, it would have been cool to see the car run in person and meet another Moparts member. I was in the D100.

Re: A trip to Milan dragway for some TNT [Re: mopar dave] #2695996
09/09/19 11:30 PM
09/09/19 11:30 PM
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Posts: 784
Liverpool, NY
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3,500 pound RR
Stock type 6 pak hood
511 tall deck, filled block
727....footbrake
Dana...4.30 iirc
Split leaf and caltrac
Rancho 9 way
Under .620 solid roller
Bracket duration
1.5 rocker
Under 13:1 compression
110 fuel
STD port Super Victor intake
1050 Dominator, non HP body
9" convertor
Swinging Milidon
2" to 2-1/8" TTI
12" collector extension
32* or 33* timing
6al

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