7420NW7TH

iTrader: (8)

Nice launch

But I wish I could hear the roar of that 408

Elite_Hot_Rod

Me too, the guy that posted the video isn't real computer savvy, sorry.

7420NW7TH

iTrader: (8)

Congrats on getting into the FIVES

What is that, about an 8.8x quarter mile?

Thats movin' out for sure!!

1QuickT-A

iTrader: (12)

I'm assuming that you run in the "Cheap Street" classes there in Texas??

I'm on the 325/50 M/T's, but would like to try the 10" tires sometime even though we don't have a small tire class around here..

NOSJNKY

iTrader: (1)

Call what you want ole boy I've been doing this **** my whole life and have actually owned SEVERAL 8-9 sec cars. I was simply trying to offer some helpful advise. The white car has VERY little nitrous on it and does run what I said it does. The car is heavy and doesnt MPH(132), it made 474RWHP through the TH400 and 9"/ 612RWHP(N20) actually made less last time I dynoed it.
Heres a video of a 10.04 pass(6.30 1/8) in the heat of the day,guess that doesnt add up either. Dont have a 6.20 pass on video but will be glad to dig up a slip and post it.
Also a video of my wifes car, it ran a 6.35 this pass and 9.99 in the 1/4, its also been 6.2xx and 9.87 in the 1/4, I consider that barely in the 9's@515RWHP and 3400lb.'s...you do the math
white car 10.04 pass 1.38 60' http://www.youtube.com/watch?v=HaOMwgwtUqY
10.05 pass with 1.42 60' http://www.youtube.com/watch?v=Sa2X3C7Exzk

wifes red car http://www.youtube.com/watch?v=Sa2X3C7Exzk

Elite_Hot_Rod

Don't know what "cheap street" is but we run in the Texas True 10.5 true street class which is on the MT drag radials.

WizeAss

iTrader: (5)

your 612 hp ran a what??? 6.30?

my 565rwhp ran a 6.60.....

seems like the difference is minimal.

Or the other.... 515rwhp with a nice 6.2 but the weight was 3400 and not 3690 (w/o driver)..... Seems like all I really need is suspension work (which I practically have none of) and hitting the nitrous converter with a larger shot off the line since the motor makes little lowend torque (gotta love big heads and a single plane intake).

Doesnt seem as bad as you said???

NOSJNKY

iTrader: (1)

Never said it was bad just that it seemed a little off. The suspension will certainly help a ton, I went from a 1.42 60' to a recent best of 1.36 by swithing to adj. QA1's, and with more nitrous, the car will respond better with a tighter converter.
My initial response was to the times on motor(7.7x's) but that could mostly be attributed to the converter/tune?? and the 6.81(N20) which in reality is a little off for for what you have. The 6.60 is certainly better ,2 or 3 tenths is not easy to pick up. The white car has been a best of 6.21 backed up by a 6.27 but will not go that every pass, the heat takes at least a half a tenth off. I was only reffering to the wifes red car for comparison sake(power to weight) and that its a NA car. As for dyno numbers they can vary from dyno to dyno,weather cond.,etc. I only compare my personal numbers for tuning purposes for variance reasons. As far as the thread goes I was only trying to offer some insight , as we have similar combinations and drive them regularly, not get tangled up in a internet argument.Good luck.

Elite_Hot_Rod

Didn't mean to come off like an *** although I am one, just tired of seeing "your car is slow as fawk'/negative comments. His car has potential needs a better converter, more TNT, a diet and it will eventually get there.

Elite_Hot_Rod

That's on a .4 pro tree, can you do any better?

s346k

iTrader: (4)

the one time i ran on a .4 pro tree, yes, i did better. most were about the same, 2 passes were better than .074 off the footbrake. but it was a stock longblock a4 z28, nothing close to what you're running.

and it was originally a joke...that is a good reaction time. you sure are defensive.

MIGHTYMOUSE

iTrader: (59)

the thread response here is totally lame

anyone have any real help?

kinda seems obvious to me there is a power issue, or a converter slip issue.

detail your tune up; try a different converter.. should be easy to find another 400 converter laying around.

congrats on your new best too! i know its hard moving a heavy car, and i'm impressed you've got it that heavy without haning forced induction on it.

WizeAss

iTrader: (5)

the 7.7 was straight off the highway with 30psi tires and a 1.76 or so 60ft.... in 100 degree temps... It normally does 7.3-7.4 on motor.

As far as the 6.6 pass on slicks.... It should do better if it manages a 6.81 on those drag radials..... I think with the 150 shot I can get the car down to a 6.55-6.6 and on motor with the right converter as it sits around a 7.2-7.3 or better in October when it is not 100 degrees out. 70 degree temps is worth much on motor and not as much on nitrous, but my car runs better after a few passes normally.

Also your wife's C5R block and combination is much nicer than mine..... beer budget over here.

Still need to find out if removing the Eibachs would be wise or not.

WizeAss

iTrader: (5)

can't imagine the converter being bad...... It is a 1300.00 Neil Chance that hits at 3800-4000 rpm... it is not mine and is a loaner. It is much better than the Art Carr I had in the car. Power seems alright... but my car never MPH's good without alot of nitrous. The concern is the mph....why is that? Is it Texas heat? or am I missing something? How much does weight effect the mph? What does -200lbs do to a cars 8th mile mph?

7420NW7TH

iTrader: (8)

Is it just me, or is 265-270cc WAY OVERKILL for this type of motor. I mean, this is more-or-less a street/strip motor. That could explain why it picks up more with nitrous than it should....

MIGHTYMOUSE

iTrader: (59)

get the car to a dyno and log the runs; do a compression check, then a leakdown if you find some lower than others

Elite_Hot_Rod

Sorry I'm old and cranky and it's hard to tell it's humor on the net.

Elite_Hot_Rod

He has had it on the dyno. He's had shop problems which are straightened out now and I think it's finally starting to head in the right direction. It takes time and patience. He does need a better converter for sure.

fasttagurl

iTrader: (12)

No offense to anyone, but I agree with the "helping him out" comments. I run the SAME numbers he is right now with 346 NA H/C car! He needs to basically go through each and every aspect of his set-up and figure out why it runs those numbers. Until you get the 408 running right you should not even think of adding the nitrous! One thing at a time is a good method, and, a lot of times people never find the right combo. That's all it's about - You have to find the right mods that WORK CORRECTLY instead of putting something together because someone told you to. Most people never GET that. Then they ask, "Damn, how did you get that little 346 to run those numbers?" Let me tell you, it took years of research and mismatched parts to figure it out! That thing should run 10.50s with no bottle man! Good luck to you!

7420NW7TH

iTrader: (8)

You can't really compare your car to his since I imagine your car is alot lighter. What does your weigh? Do you have A/C, power steering, etc? Taking off accessories makes a big difference. I'm not defending, because obviously he has some bugs to work out. But comparing your car to his is definitely apples and oranges.