394 rwhp and only 12.6 ???

ok I have 394hp to the wheels at 6300 rpm and 361 pounds of torque at 4500 rpm. I have all suspension mods and et streets, 3.42 gears. My vigilante is a 3400 stall but it is only flashing at 3000 plus i am crossing the finish line at only 5000 rpm. What is most embarrassing is the 12.6 @ only 107. I hook good and only get 1.82 60' times. I have the 230/236 cam if that helps. I know I have something out of place but cant figuire it out. all comments are greatly appreciated.

Do you know how much the car weighs? is it a rag top?

I just noticed you are from the mon valley. Where did you get dynoed at? Do you run at Keystone(pittsburgh raceway)?

With that much hp you should be doing better. Sounds like either the stall or tranny slippage to me provided you are hooking up. Are the shifts firm or soft?

it shifts very hard I just had the tranny built with heavy duty guts and a transgo. yes i race a keystone

hmmm your mph is way off you should around the 112+ mph

you need a better 60ft for sure

is the car tuned??? with ls1 edit?

something is wrong with your set up

what do you run for tires?

its tuned and i run et streets

Is it running rich? Perhaps some blockage in the exhaust like a stock Y pipe or plugged cat?

Your sixty foot time could probably be lower too. That is why I was thinking stall slippage. The more horsepower you have the higher the stall should be. I am currently suffering because my 3600 stall is actually stalling at 4400 and that is too much for my car. I can't get a decent dyno off it because of slippage. Perhaps the converter should be redone.

This is strange, you were able to post that much rwhp but your times are reflecting that. If you are having slippage I would think it would've shown up on the dyno. Do the rpms stay at 5k for a while or are they steadily climbing? What was the elevation of the track and what were the weather conditions? How much does your car weigh? Those are decent numbers btw, is it a stroker or just a heads/cam setup? The times in my sig are with 345 rwhp. My raceweight varies between 3660-3700 lbs.

Well, I doubt it is slippage if he just had it rebuilt.

How was the weather? Were those #'s corrected?

I can only get 2200 rpm out of my before it wants to turn the tires over. If you are getting 3000, that does not sound right.

How tall are those ET streets? Taller than stock? A taller tire will hurt you by basically making you run less gear.

It is not uncommon for cars with less gear to dyno a little better than geared cars.

Have you changed anything recently?

the track was kinda crappy and nobody was hooking great. It was a good day. as for exhaust i have an x pipe with bullets so thats not the problem. as for the stall my converter flashes at 3000 rpm. when you say 2400 or whatever that is break stall. the guys at the dyno said i might need a bigger converter. I thought vigilantes were underated as far as rpm but mines flashing 400 rpm lower. thanks guys

whats ur elevation at ?! ur dyno #s could be corrected for elevation but ur race track isnt !!

for the record i ran 117 mph with a 3600# car which only put down 380rwhp and 350 rwtq .. in an M6 car .. ran 12.0 w/ 1.80

I've never had my car dynoed, but from my calculations I should be putting down #'s close to yours. My race weight is 3450 and it ran the time in my sig in mid may. First, what year is your car and what tranny do you have?

Randy

Jeremy-autotap your car on a run and check o2 readings , knock sensor and timing retard. you could have poor quality fuel and it is pulling a ton of timing killing your mph .
I have a vig 3600 and it stalls to about 4000 rpm .
Maybe your convertor is going south on you.

Anyway, those things should show you something-in my opinion,goodluck.
Dave

Originally posted by thechef
hmmm your mph is way off you should around the 112+ mph

you need a better 60ft for sure

is the car tuned??? with ls1 edit?

something is wrong with your set up

what do you run for tires?

I agree with ^^ The MPH should be higher. At least 113 or 115.

Duane

I had my car dyno'ed at 362HP NA :confused: and It ran a best of 7.09@98NA I think the converter had something to do with It, I picked up after going to a tighter converter, but havent had time to dyno since then

that mph is way low. im trapping high 109s with just bolt ons and right around 300 rwhp

Wow, all these replies. And they mostly point to the trans and some to the pcm (pulling timing).
I am in the same boat...
I say this because I am having similar probs with my chevelle.
She has at least 450 HP at the crank and the trans is a stock TH350 with a 10" 3000 stall. I haven't been able to get better than 1.89 60ft and 13.1 @ 106 mph. With my combo, I should be running 1.7 60 ft and 12.3 - 12.6 @ 112 - 115 mph.

I know feel that my trans is the culpret along with possible fuel starvation also.:( :(

I hope you get your problem fixed!

I would get the pcm analyzed while making a 1/4 run and if it shows nothing wrong, then have that trans/converter checked out.

Can you scan the dyno graph for us to look at? Is the 230/236 cam in a stock-cid LS1? If so, that's a lot of cam with very little converter behind it. You said that the converter is only flashing 3,000 RPM. Something is wrong because a Vig 2800 will stall 3100 behind a stock LS1, a Vig 3200 will flash 3800, and a Vig 3600 will flash 4200. I've tried them all. :) You don't want to know what a Vig 4000 does behind a 383! If you're really only flashing 3,000 RPM, that would at least explain the 60' problem. Also, if the cam is very peaky, it may show great dyno numbers but poor track numbers with the car not setup properly. How was the average horsepower? If this converter is really only stalling 3,000 RPM, you'll be dropping to 4200 or so on the shifts with 3.23:1 gears. That's WAY out of the power range of that cam! Also, was the 394 RWHP with a locked or unlocked converter? If it's locked, the car is most likely doing 370-375 RWHP unlocked. Even then, you're lower than you should be on the MPH. I ran a best of 12.04 @ 111 MPH with 315 RWHP (unlocked Vig 3200), and my raceweight was 3,525#. It's all about the setup.

Feel free to give me a call or shoot me an e-mail; I'll be glad to discuss it with you.

Trevor
Texas Speed & Performance

is it normal for a vig 3200-3400 to stall at 3000? I thought it would flash around 3600. anybody have any ideas about that?

Originally posted by jeremy reppert
is it normal for a vig 3200-3400 to stall at 3000? I thought it would flash around 3600. anybody have any ideas about that?

No, it's not normal at all for a Vig 3200 to only stall 3000. The Vig 3200 uses a #6 pump. It flashed 3800 in my SS with stock internals, and I have quite a few customers that have told me the same. The Vig 2800 flashes 3100 RPM, FYI, and that's what it sounds like if it's only flashing 3000 RPM.

Trevor

well i just ordered a cable so i can check for knock and stuff from a laptop. if its not that the tranny will be out next. anyway my car is a 95z not an ls1. thanks for your help guys hope to be in the 11's in a few weeks.

It sucks you might have a problem with your trans:(

But my first traction limited run spinning 1/8 was 13.11 @ 112:mad: