Dyno tuned today.........

[Batman]

And I have to say for the way the car runs I was disappointed with the numbers, although everybody who dyno's seemed to be low today. I was hoping for 450 to the wheels and would be pleased with 425, but the car fell just short at around 420. Runs great, power curve is spectacular but the numbers were low. I guess since it is a nitrous cam in it I shouldn't be too surprised, especially through an A4, Cats, and a 12 bolt, when the car was heat soaked and with an engine with only 300 miles on it. While I don't think it will go 10's on just the engine I am still optimistic of around 11.2-11.3, and like I said it was built for nitrous, not that I would do that :) . Anyway a little disappointed in the numbers but very pleased with how it runs. I also have to remember when I dyno'd my cam only engine I was disappointed with 367 RWH (M6, no Cats, 10 bolt) and got that motor all the way to 11.7's at full weight. I also think in a couple thousand miles when the engine frees up a little more it will make my 425 goal. So i won't pass judgement until I get to run it at the track, I've never put too much stock in dyno numbers anyway ;)
Best heat soaked pass was
418RWH uncorrected
377 RWT uncorreced

Never got any "corrected" numbers

and oh yeah it makes 300+ ft lbs from 2200 all the way to redline at 7000.

[johnjzjz]

i would like to know if the dyno sheet shows the time it took to make the power to the wheels -- that is the real way to use a dyno -- its a tool nothing more -- corrected #s are for the shops that fall short of what a customer was told -- along the side of the sheet it might have a time slot in seconds -- i hope it does ?????? does it -- jz

[Batman]

No unfortunately it doesn't, the engine is pretty rev happy though. I think it will do fine at the track

[ar0ck]

I'd kill for those numbers! :lol: I hope that when the motor breaks in you get the numbers you were searching for!

[johnjzjz]

No unfortunately it doesn't, the engine is pretty rev happy though. I think it will do fine at the track

what does the car weigh i will run it on our program -- jz

on my Power Speed Calculaor 11:33 -- 118 MPH
420 at the rear wheels at 3500 lbs a guess on my part

[Batman]

last good weight was 3845 with a 1/4 tank and driver, it weighed 3755 when it ran 11.7

[johnjzjz]

last good weight was 3845 with a 1/4 tank and driver, it weighed 3755 when it ran 11.7

again its a guess i dont have any real data -- @ 3800 lbs 11:49 -- 114.5 mph

367 at the tires on my slide ruel @ 3800 lbs 11:70 112 mph

[V]

Congrats on the nice numbers

johnjzjz...mid 11s at around 114mph?... that gets me thinking, i ran 14.0 at 114, hehe no traction and untuned.... with good tires and a tune, i wonder what im capable of.

[johnjzjz]

Congrats on the nice numbers

johnjzjz...mid 11s at around 114mph?... that gets me thinking, i ran 14.0 at 114, hehe no traction and untuned.... with good tires and a tune, i wonder what im capable of.

if a motor makes good power and it takes to long to get to the end of the quarter the MPH is always higher than expected -- case in point one of the drag cars we built motor trans and rear for - last fall the car went 8:33 @ 169.7 -- now the 169 corrected MPH for 8:33 is 158 mph - the corrected et for 169 is 8:20 -- so in a high end drag car car camshaft timing is the answer to the problem - the cam needs to be advanced - motor is making not enough low end and it is taking to long to get the 1350 done - engine speed is also a problem its not geared for 169 with safe rpm - getting back to a dyno - its all in the time it takes to make the power not the power #s them self that is important - the race track is the best dyno we have - and keeping track of weather / track temps / tires / and all the other stuff is so very important -- the key to drag racing today is doing the same thing ( exactly ) every time and in this way you can make a single change - and your ticket will reflect good or bad -- so in the end we hope we can slow the mph and quicken the et - best case is 8:25 @ 165.5 -- if the changes we just made work --thats in very good air not mid summer -- jz

[Batman]

YeahI was trapping 116 cam only, like I said we won't know till I actually hit the track

[damon_Z]

Weather conditions will still affect SAE numbers even though the numbers are SAE. Let me guess, you probably went on the dyno on a day with a low barometer (less than 30 inHg), at least 50% humidity with the temperature at 60+*F? Your dyno operator should have told you to expect lower numbers and to come back in the winter time to get really good numbers.

[Batman]

Temp was 75, barometer was 29.73, humidity 45%

[damon_Z]

Temp was 75, barometer was 29.73, humidity 45%

I wouldn't expect awesome numbers in those conditions. Just dyno in the winter and run the quarter in the winter. Then, you'll probably get the insane dyno and track numbers that you want.

[Batman]

I don't really care about the dyno numbers, I was more interested in getting the A/F correct and it is spot on.

[johnjzjz]

I don't really care about the dyno numbers, I was more interested in getting the A/F correct and it is spot on.

can you adjust the A/F - i friend is running a stock eliminator gen 4 Camaro and his set up allows him to change the fuel curve - its a 10:something car forget the class but it has a lap top to do the changes and down load graphs of what it did -- jz

[damon_Z]

I don't really care about the dyno numbers, I was more interested in getting the A/F correct and it is spot on.

Yup. That's the whole point.