how much would i gain,,, i currently have cai, off road pipe, slp 2otlexhaust,

thanks,shawn

 

I have never dynoed my car so I cant tell you exactly(wish I could).My guess would be 20 to 30 HP.

 

Most dyno results I see are between 20 - 30 rwhp.

 

20-30 that great!!! what do you guys do fot the ypipe????

 

You can a buy a mufflex y-pipe for about 250$ of have a custom one made for anywhere from 70$.

 

I agree about 20-30rwhp. I had a custom 3" y-pipe made by a local shop called Florida Performance. Fits like a glove and never rubs, plus it's tucked in nicely.

 

cant find anyone in illinois who makes them....do you know anyone...leave name and phone numberr pleaz!!

thanks,
shawn

 

A few years back GMHTP did a complete exhaust on a f-bod using shorties an only gained 30hp total....30hp seems excessive just for longtubes!

 

Ls1 speed in schaumberg they have dyno and install everything they quoted me at 20 from the long tubes so take it as it is. I still have not made up my mind between them and slp headers for my 1994 z then into a gmmg i think wonder how that will sound?

 

well the headers make most of the difference (a cat back will gain like 5hp) and LTs make alot more power than shorties. so I'll believe it...

 

Long tubes will definetly give more of a gain than shorties. Shorties/lts obviously are alot less restrictive! Just look at a stock manifold. I would think 20hp would be a min. Maybe more or maybe less, some cars would gain alot more, some not much. I don't think shorties are much better than the stock ls1s.

 

I dont have dyno numbers but i picked up 7 mph with hooker LT, and a y pipe. Speaking of Y pipes for hooker LTs, if you want one i got one for sale over on the FS board.

 

for those of you that think shorties aren't much better than the stock manifolds, have you ever actually had the manifolds off and looked at them? The holes on these things are seriously tiny...

I would also like to point out that in the GMHTP bolt on LT1 shootout, the fastest car there was running Edelbrock shorties, which most people consider the worst shorty header out there.

IMO the main reason LT's gain so much over shorties is the fact that lots of people that do LT's go to true duals, and thast where the gains really are. Cramming 2 2 1/2" or 3" pipes into one 3" pipe is a bad design all around, and I don't see much gain happening because of that between LT's and shorties on a mild/single 3" exhaust car. In fact, some people have done before/after tests and not even noticed 5hp between shorties and LT's on anything under about 400RWHP.

 

magiunus...thats not true at all...i just saw a dyno yesterday on a stock 96 TA, who put on longtubes....stock motor....he gaind 26 horse. duual exhaust isnt neccesary

 

I dropped about .4 in the 1/4 w/ the addition of longtubes.. i'd say a solid 30rwhp gain... i'm also up 4mph even after a torque converter, which supposedly makes you lose a mph or so.