antenna

What makes you think that 425hp on motor in a 2900 lb car will get you high 10s?

What compression are you running?

What are you going to do with the half shafts and rear end when you hit this thing with a 300 shot?

Eric Fischer

Actually 425 RWHP (approx 500 HP at the flywheel) in a 2900 lb race weight vehicle should be good for 10.50's (by my calcs).

TreyZ28

:skep: with a 6spd none th less? :leaving:

Eric Fischer

The formula predicts ET under ideal conditions (good traction and an optimized chassis is assumed). Wether or not this is possible in the real world is another story...

TreyZ28

tell me youre note using the 10hp=.1 sec rule :lolg:

Eric Fischer

try this Jr.
http://www.dsm.org/tools/calchp.htm

LS1Tuner

Heh....well if a 425 rwhp car doesnt run 10's with a 2900 race weight on full tire, then theres either something SERIOUSLY wrong with it or its a supra.

Geez i would at least expect 10.7-10.8 @ 128-130.

my car is stock 10.5:1 compression

Halfshafts are Dennys Nitrous Halfshafts and i have a Dana 44. It bet its
easier on rearends than most 6-spd cars.

Anyone that uses a simple Weight/power/mph calculator and thinks its dead accurate it pretty foolish

If you take a 400 rwhp nitrous car and a identical all motor 400 rwhp car, the nitrous car will run SEVERAL tenths faster in the 1/4 mile from the huge amounts of lowend and midrange torque. everytime the motor car shifted the nitrous car would run away.




[Modified by LS1Tuner, 1:40 AM 4/10/2003]

TreyZ28

A few things-

First off
what about torque?
Concidering that your acceleation is DIRECTLY related to your torque curve-
I'd say there is more to this story than meets the eye- especaialy when you are using a 5spd AWD/FWD turbo 4banger's calculator to figure out the acceleration of a RWD 6speed NA Vette.
Average power/torque wins races, not the number in magazines or peak numbers.
Impropper gearing will also make one hell of a mathematical mess to sort out (which isn't so much an issue in a t-56)

Also
This thing is telling me my 95 Z28 had 344rwhp with headers and a catback through an auto?
nice, 114 rwhp gains with exhuast!

and when all else fails -
READ THE WEBSITESupras are only slow in ET due to their rear suspesnion which is designed for autocross and turbolag issues.

As soon as they overcome t-lag they have to ease up on the gas or the tires break loose, which in tern slows down the turbos and you have this huge mess which makes me say

:hurray: for displancement :hurray:

bill mcdonald

So with this, I get a 2900 pound car going 11.1 with 419 hp.
the MPH comes up with 123 with 421 hp.

I tried comparing it to an old forum members car, Shalin, who ran a 10.85 at 128 I believe. I put the car at 3450 and it came up with 534 hp for the ET and 565 for the MPH, which is about where that car was at dyno wise.

Now if he ran the same and had 2900 pound car, he would need 449 HP for the ET and 475 HP for the MPH.

What does all this mean? I dont know :jester :lol: Just thought it would be fun to play with.

Eric Fischer

Junior...

What exactly are you arguing about?

This is a very well known formula for estimating HP based on trap speed and ET. The formula works as an estimate for any vehicle, AWD, front drive, rear drive, etc. It has nothing to do with the DSM website. I only posted the website because I typed in my browser "HP calculator" and that was the first one that came up. I thought this would be easier for you to see than my typing in the formula and explaining it. It's funny how you criticize the DSM website, but then you use it to back up your argument.

Finally did I mention the formula is an estimate ?? Jeeze open your eyes a little and you might learn something :)

BTW, the formula predicts flywheel HP, not rear wheel HP. So yes, your camaro with exhaust does have around 344 fwHP.

TreyZ28

hey senior-

how can it compute FlyWHP?
Does it know ANYTHING about my drivetrain? no!
Subaru WRX 30%+ drivetrain loss through its AWD
Z06 = 14 or 15%

It has to be calculated for one or the other...

Also, dont forget to factor in a cage (140lbs) and all the other safety stuff (inluding what you will wear), your wieght, added weight of slicks ect-


That thing cant tell anything-
my car with a converter = .5 sec faster
same power :confused:

use mph and you will see the supra vs C4/4th gen F-bod thing.

I say your luckey to run 11.2 NA

Zix

I'm confused...what does your drivetrain have to do with flywheel HP numbers? The whole point of FWHP numbers is to take the drivetrain out of the equation.

TreyZ28

MPH is related power getting to the ground-
not what you make at the flywheel.
These formulas can only tell you what you get to the wheels (est), not what the crank makes.

Zix

Ah, okay now it I see what you were saying

antenna

What has this guy done to the motor to give him 425rwhp? Heads and cam? He's only running 10.5 compression. Where is all the power coming from?

He's got a TH350?

3.07 gears?

I think he's blowing smoke.

Eric Fischer

It's very believable for an LS1 (that's probably what attracted LS1Tuner to put the LS1 into a C4 in the first place). Checkout BillY2KFRC on this forum. He is making 456 rwhp on what I believe is the stock LS1 shortblock. He recently ran 10.99 at 124mph in his full weight C5.

There is more info in this thread here:
http://forums.corvetteforum.com/zerothread?id=524975

TreyZ28

thats childs play
when you have 15* head with 200cc runners and the "equal" port thing going-
sky is the limit. The LS1 makes the LT1 and L98 look like they were from the stone age.

Stealdads67's classmate is running 9.97 on LS1 castings, stock bottom end, stock 4L60E, Stock DS and Stock 10 bolt in a WS6 :eek:
The car is pretty tame too-
hopefully kev will see this and chime in.
From what I understand the kid is done futzing around and just got a Yellow C5 :smash:

antenna

What about the 3.07 rear, the TH-350 and the 10.5 compression?

Nick C

LS1 tuner,

What happens if you'd like to keep the ZF6 as opposed to an auto? If forget if the bolt pattern is the same from Gen II to Gen III. (Like putting an LS1 into a LT1-ZF6 car).

Nick

Fastguy

[QUOTE
I think i have about 10 hours of labor TOTAL in the whole swap.

[/QUOTE]

:skep: Total? You pulled the engine, made all of wiring and exhaust swaps, fabricated all of the custom pieces and had a tuned turnkey car in 10 hours?