if i fit a hks hyper decat exhaust system as well as the hks super flow air filter how much power increase will this give a uk my98
and will this power increase have any effect on the cars transmission
ta paul

 

are you decatting the down pipe as well ?

I bet you will see 20+ bhp

 

you shld get 20-25bhp no probs with transmission

 

I have a magnex 6x4 b/b and center section with a k&N 57i filter and it turned out 250bhp and 234 ib/ft torque on the R/R.
Thats 32bhp over stanard more with a down pipe.
hope this helps.

 

I'm assuming silver:scooby that your +32bhp is based on new Rolling road figure versus quoted power output? Sorry, but IMHO I doubt you will have actually got 32bhp from centre, backbox and filter, Barge/ninja's figures seem more likely to me.

If you check out the dyno site, you'll find one completely standard MY97 made 248bhp at Power Engineering, 230-235 is common, so I'd guess your exhaust and filter has given you more like +15bhp.

 

Sorry my mistake typing error should have been 22bhp

 

I have to say that only big problems come from raising the boost without proper control. Why would my car (SAME CAR) produce a proven safe and reliable 289bhp and 286lbft if that wasn't true Paul?

 

Alan, are you saying that your car got those figures from just an exhaust and filter?

 

alans car is the same car but he also has a few boxes of tricks in it but he has had no problems with is
al i just think its down to the dealers lack of knowledge in fixing anything

 

i ended up with 260 bhp

 

No problems now that is, after an engine and a gearbox

 

I've got a my98 with a filter and full de-cat. A large difference in driving performance was noticed but not sure about bhp