Question on supercharger 1/4 time

toddan · 08-15-2009

In about 2 weeks, I will be installing a whipple 2.6l with abought 8 psi pressure . The shop people tell me that it will have around 450 hp to the wheels after the tune. the car is stock except I also will be installing an aluminum drive shaft and the car also has a new set of Nitto 555 . the car has an auto with stock gears. I live in Mobile Alabama at about 100ft from sea level. What can I expect at the 1/4 mile on a average pass and maybe on the best pass ? Also, is the driveshaft even worth installing ?

2Manystangs · 08-15-2009

450 is certainly an ambitious outlook and on a stock engine maybe not the best idea, I'm not sure the shortblock has forged pistons/rods...don't just slap a supercharger on the car, you will need to upgrade the fuel system too to handle the boost...trust me, not cheap once it's all said and done ($7500+), for lblower, fuel pump, injectors, mass air and tuning, and how about some guages? Anyways, don't overlook the small stuff, you can easily blow the motor...from there, the "hook" will be your biggest problem, I'd estimate the car could run mid-high 12s if it was tuned and running really good with traction/slicks.

toddan · 08-15-2009

the kit will have everything to it to do the job at $6500

toddan · 08-15-2009

the bottom end will do just fine. The question is, how well will the car do in the 1/4 if it doesn't blow up ?

ITLRUN · 08-15-2009

For one the NITTO 555's, have nothing to do with the motor. There are a lot of variables, that come in to play no. 1 how well do you drive. Reaction time consistantcy, and gauges aren't small things to overlook. They're what monitor your engines parameters, your fuel system needs upgrading. Your MAF when changed, I would go with Pro M and have it calibrated for the injector size required. Pro M doesn't read like a stock Mfg. reads, your stock MAF reads pro-logic where Pro-M reads injector size. And when it comes to tuning, it's much easier to get your MAF Transfer Function right the first time without running lean and doing damage to your motor. Your MAF Transfer Function, is the most critical part of your tune. If you get it wrong, you have the whole tune off. Now you have to start all over again, and at around $100.00 per hour for the dyno you don't want to make mistakes. At near sea level and tuned for it, with a good driver and a good set of stickies it's possible to get into the low 12's, Mike. SCT Tuner.

418wstroker · 08-15-2009

If you indeed put 450 to the wheels you should see about ~117 MPH at the end of the 1/4 mile...that can be a 14 second run or a 11 second run. It's going to depend on your suspension setup and driving skills.

**RLG34750** · 08-16-2009

It seems you are making a common mistake......

Trying to make a lot of horse power without the supporting components....

I see no mention of suspension upgrades

Horsepower is useless if you can't put it on the ground

To quote a wise old drag racer

"Spinning Ain't Winning"

2Manystangs · 08-16-2009

Just saw dyno on stock 2005 GT, 268 rwhp...for that blower to add 200 hp is not realistic (that shop is not being honest or has never done it), listen to what people here are saying, if you crank that boost up without serious mods get ready to build a new engine, you should go with about 6lbs of boost on a stock engine, it will put you in the 13s, about 1 second over stock

shinerstang · 08-16-2009

Quote:

Originally Posted by RLG34750

It seems you are making a common mistake......

Trying to make a lot of horse power without the supporting components....

I see no mention of suspension upgrades

Horsepower is useless if you can't put it on the ground

To quote a wise old drag racer

"Spinning Ain't Winning"

I agree Reg. I see 2.6+ 60fts in his future.....

PLstang · 08-16-2009

Quote:

Originally Posted by 2Manystangs

Just saw dyno on stock 2005 GT, 268 rwhp...for that blower to add 200 hp is not realistic (that shop is not being honest or has never done it), listen to what people here are saying, if you crank that boost up without serious mods get ready to build a new engine, you should go with about 6lbs of boost on a stock engine, it will put you in the 13s, about 1 second over stock

450 on a 4.6 3v with a Whipple is completely realistic (more like 10lbs of boost though). It's also the recommended max rwhp for a stock GT bottom end (10lbs of boost max, 450 rwhp to 500 rwhp*).

You'll have no problem making that power in decent air and yes the Whipple kit does come with all the necessary upgrades.

You don't need to worry about the MAF. I run a stock MAF without a Diablo MaFia, the tables will just need to be corrected.

However, Reggie has said it all. You'll blow those tires off. You don't have the correct suspension to put that power to the ground.

Look into the following:

LCA's
UCA
Adjustable rear shock (QA1 single)
Different torque converter
MT/ET Drag Radials

That should allow you to use the new power more effectively.

Oh...and have them instal a loop on that one piece DS (yes the DS is worth it). And remember since you have a non-stock power adder on your car you'll be needing a race jacket when you go to the track!

*just a note, 500rwhp on a stock bottom end is a high speed engine disassembly waiting to happen.

2Manystangs · 08-16-2009

Yeah and that's what Kenne Bell supposedly says too...until you bolt one on and see how lean it runs, then you run to a tuner and have all the "real" upgrades added so you don't blow your motor...Kenne Bell says their warranty is void if you don't have a CAI and they don't even include that in the package!

PLstang · 08-17-2009

Quote:

Originally Posted by 2Manystangs

Yeah and that's what Kenne Bell supposedly says too...until you bolt one on and see how lean it runs, then you run to a tuner and have all the "real" upgrades added so you don't blow your motor...Kenne Bell says their warranty is void if you don't have a CAI and they don't even include that in the package!

Well considering I've had a Kenne Bell on both a 5.4 and a 4.6 (S197's) and the car listed in my sig is running a KB, I'm going to half to call you on that. Perhaps Your speaking about earlier models. However, the KB kit, as the Whipple, is fine at the power levels your speaking of OP.

In regards to the tune, I've always run a custom tune. However, in most cases when we tune from a KB tune the car is rich not lean. Even the super snakes that have come into the shop have been rich. Never really seen a lean tune on a properly installed KB S197. Not saying it doesn't happen...just saying I've never seen it.

In any regards, 450 is not an aggressive goal for an S197. Get closer to 500rwhp and your asking for trouble.

2Manystangs · 08-17-2009

My KB is not an early one, it's the new 2.1 big bore...now I do think the guy that installed it botched the boost a pump install, but I decided not to skimp and had 60lb injectors, 90mm SCT mass air and 255lph fuel pump and custom tuning done so there would be no doubt that the engine and fuel would be overbuilt if anything...

jsusisaliv · 08-17-2009

I think 450 is obtainable with that combo as long as someone knows what they are doing with the tune and you are running high grade gas so the timing can be advanced somewhat to obtain those numbers. But be careful, be VERY careful because the stock bottom end will scramble if the tune is not right on and you are not running good high octane gasoline but just be nice to your car and don't rag on it like you stole it and it may be fine for a while.

BOOST IT BABYYYYY!!!!!!!!!!!!!!

95gts silver/bl · 08-28-2009

so if i run 125 mph@12.20 with a 2.0 60' on street tires what kind of power am i making .what is a realistic time i should be able to run on DR with drag suspension.I was thinking around 450 without tune as it sits.