RobEvo5

iTrader: (9)

Went to PE Saturday just gone, and got some rather disapointing results in terms of peak power. The fueling was way too rich and timing I believe was very safe. But peak power was well down and was being held back at the top, and the car does feel restrictive at the top end.

To combat this I have moved my plans foward and will be fitting a STI8 top mount on my classic very soon, and whilst I hate the noise of induction kits. Is it time to take the plung and put an induction kit on and remove the standard airbox and K&N panel filter to help the breathing at the top end.

If I am going to fit the intercooler, I figure now is the time to do an induction kit if its worth it.

I am hoping the STI8 top mount and pontentially an induction kit, and another map tweak to lean off the fueling and less conservative timing will get me where I thought I should be.

So in sumary is an in induction kit worth it on a 2.5, with 20g, and headers ?

Thx

RobEvo5

iTrader: (9)

p.s If an indcution kit it a good idea in my instance, what the best cheapest one on the market. K&N ?

Daniel-S

Iv heard the APS ones are good

R25 sti

i have the aps cold air indution kit on my 2.5/20g/headers etc with good results.having said that i did it all at once so i dont know if it makes any difference....sorry!

RobEvo5

iTrader: (9)

I have been building the mods up hence I done a power run to see where I am, but does look like I am missing a vital ingrediant. Its all a balancing act and after the initial shock of the results was glad I done it, as I already felt the car was quick but looks like a lot more is to be had once I have got the balancing act right. The APS or equivalant is looking a strong possibility at the moment.

R25 sti

i know what you mean.my first power runs were disapointing but after a 3" decat and an md321 20g it was sorted.are you using a cat? my mates 2.5 with sports cat only got 305 bhp (he has a small turbo). when he had his 6 speed box fit the cat wouldnt fit anymore so he chucked it.after another remap he got 344 bhp/390 ftlb...

RobEvo5

iTrader: (9)

No CATs.! Was moderately happy with the torque at 362ft/lb in a a narrow rev band which explains why its feels quick, but only got 326 bhp at 5260rpm.

My target was originally 350/350. But having brought the 20g, I am now looking/expecting more 380/380. My mates 2.0l with a lot less mods is coming in near the 326 mark. The 2.5L is capable of so much more. And would say for the mods I currenly have its must be the slowest 2.5l on paper. But like I say good news in a way as potentially I have another 50bhp and possible more torque available once I get things right.

Its all part of the fun. If I put it on the rollers and it produced 380/380 straight off I wouldn't have anything to play with

Having read a few more threads, andy f reckons the APS cold feed would support 400bhp. But just prior to xmas a group buy was attempted and it would appear the APS is now discontinued. Will make some calls tomorrow to see if I can get one.

RB5_245

If you fit an APS straight off it will lean the mixture out, has to be mapped at the same time.

RobEvo5

iTrader: (9)

In my instance, leaning out mixture would be a good thing as I am currently running too rich. But would get it mapped though.

bob

I have a 2.5, with 20g, and headers induction kit and catless. 350/350 was easily reached with 1 bar but MAF was at Max. Had Ultronic ECU fitted and 1.3 bar gave 380/380.

R25 sti

ive got ecutec map with maf,running 1.3 bar....396.4 bhp/387 ftlb...

RobEvo5

iTrader: (9)

Is that with front mount or top mount sti8 ?

It would appear I have alot to come from the figures that are being shown. Hopefully some 2.5's are going to PE this Saturday on the dyno day. Would be interesting to see what others are getting. Sadly I can't make it myself, but would be good to see what other 2.5's on the same rollers are seeing.

I need more power, but will probably need to be investigating in a super strong clutch for my UK box at the very least. Which will then probably break the gearbox.................. and so the modding goes on

R25 sti

i have an APS duel entry top mount,and my mates is a standard version 4 sti top mount.my mates version 4 gearbox gave up at 305/360,but the version 4 box is made of chocolate (apparently)..
p.s. we both have uprated clutches.

RobEvo5

iTrader: (9)

APS - top mount ..very nice. It does sound like the STI8 should help me no end. It saw 911/Graham alright for some good figures, maybe it will bring me some better numbers.

All things considered the power and torque from what is currently a UK98 intercooler on safe timing and what would seem rich fueling is now not sounding so bad. BUT still want more . I won't stop until it does.

Neilo

i think the intercooler would help no end for sure im using a frontmount on mine hopefully to compensate from using a relatively small turbo (MD195, VF22 hybrid)

911

Remember my TMIC/20g etc on my Sti V3 pulled a string of 380+ and one 407 bhp run @ Well Lane a year ago.
In the summer it made 380 at PowerStation.

You should see 380 x 360+ imho if everything else good, especially the mapping. That was all on the stock inlet with Green Cotton filter and stock MAF.

You will shread that gearbox!

Graham

RobEvo5

iTrader: (9)

If it goes it goes, it will force my hand. Only problem lies with not really wanting a 6 speed and I do like the long 5 speed UK box. Which don't leave me with many options for a reasonable outlay. Sods law is it will shread, and then I won't be able to lay my hands on a 6 speed.

I do need to do some research for when the time comes, and will probably start another thread for this at some point. currently thinking a UK 6 speed at some point which I think will bolt straight on the originally diffs.

RobEvo5

iTrader: (9)

Graham, don't forget mine is running UK heads though, and the STI3 heads are claimed to be the best of the bunch. So expecting the BHP to be down a bit from these figures but torque holding up.

You have answered my question with regards to induction though. It would appear all going well my ITG filter in standard airbox should hopefully see the results I am looking for.