...and no other mods? I want to get an estimate on my hp. I've got Pacesetter LT's, Pacesetter offroad ypipe, and flowmaster catback and ram air.

I'm curious as to what hp you gained?

I couldn't find any definate answers when I searched but people on here say around 25HP.

side note* Are the hp gains the same for rwhp and engine hp? For example, if you gained 25hp on the dyno, would that equal 25 engine hp or would the engine hp be greater due to drivetrain loss?

 

That depends on if you are an A4 or M6. I would say 30 or more RWHP could be gained from having a "full" exhaust like you have. "Stock" auto's usually dyno around 235 RWHP, and 6-speed's are usually around 250 RWHP.

So if we add approx. 30 to those stock numbers for your mods.
Auto = 265 RWHP
6-speed = 280 RWHP

those should be close to your numbers

Regarding drive train loss. No matter what you will have loss through your drivetrain. Your RWHP will ALWAYS be less than your FWHP, doesnt matter if we are talking about the whole motor, or the addition of a mod. For example, LT1's are rated at 285 FWHP, but autos will make around 235 at the wheels. Or a set of headers might gain you 20 FWHP, but only around 16 hp at the wheels.

hope this helps....

 

OBJECTION!!!

 

My thoughts:

271rwhp ----> 6 speed
256rwhp ----> auto

Im just comparing it to my dyno numbers.

My best dyno run ( they had no idea what they were doing ) was 278 rwhp.
This was with mac mids, madz28 tune, hooker cat back, no cat, cai, trickflow intake elbow and a few other little things through a M6

My comments:
Your ram air isnt going to do a whole lot just setting on a dyno and your flowmaster isnt the best flowing muffler out there so those may not make to much of a difference. Your basic mods of Lt's and no cat. So lets give you a high 18 rwhp for the lt's and 3 rwhp for the no cat. So i pulled the "stock rwhp" number out of the thread above mine, which are pretty much hit or miss, every dyno/car is different and is going to put up different numbers everday, an added my rough estimates of your horsepower gains to them.
But what do i know? im no body.


P.S. YES, there will be a difference between motor horsepower and rear wheel horse power! Where have you been for the past 7 years?!!? with 1500 posts, you dont know that??? Please tell me you were drunk when you said that, or you spend all your time in the appearance/wheels tires/car care forums.

 

http://autos.msn.com/research/vip/sp...maro&trimid=-1

Check it out. In 96 and 97, the addition of dual cats supposedly upped the hp to 285.

 

ok smart ***, did he even specify what car he has? If i was to take a guess....He says he has ram air. so maybe (or not) he has a ws6, which werent they rated at 305-315 hp?

 

Definately not 315.... I wanna say they were 300hp, but they didnt dyno much more than a Z28 or TA.

 

my car put down 271/300 with cai and full exhaust. it is an a4

 

284Whp
320Ft Lbs

94Z28 M6-Lt's Y-Pipe- Catback Cold Air-Tuned Ecu

 

Your right, it didnt make much, if any at all of a difference from the normal lt1's. I was just suporting my "smart ***" comment about the lt1's not only being 275 rated hp but also 285 and 305.

http://auto.consumerguide.com/auto/u...ex.cfm/id/2228


1996 Pontiac Firebird:... At the same time, the Formula Firebird's V8 engine got a boost to 285 horsepower. A "Ram Air" option hiked the V8 to 305 horses.

 

Gotcha.... LOL it helps to back up your smart *** claims.....

 

this is what 1 guy from LS1LT1.com with an M6 LT1 said:

Placing the car on a Dynojet chassis dynamometer provided us with new power numbers. Prior to the headers, the car produced 255 horsepower and 289 ft-lbs of torque to the rear wheels. With the headers installed, its output swelled to 282 horsepower and 317 ft-lbs, a net gain of 27HP/27FT-LBS. I wanted to make a pull with the cutout opened but we ran out of time; I know of a similar near-stock LT1 with the FLP’s that picked up 15 horsepower and 15 ft-lbs with the cutout open.

 

Of course I know that there is a difference. What I'm not sure about is if drivetrain loss is a set HP number or if it's a percentage.

I would think it's a set number like 30HP and it will always be 30HP no matter what you put on the car, right? So a 30hp mod would be 30hp to the wheels or fwhp.

 

Its a % ... M6 cars loose around 14% on the stock rear end. And FWIW 14% is pretty damn efficient. Autos are alot higher drivetrain loss.

 

10-15% drain i think but its HARD to get a dyno reading on a stalled auto