j900ase

Thinking of futher mods to try and achive this figure, is it possible?

I allready have Td05/18g, APS FMIC, Injen CAI, ECUTEK remap, APS 3 1/2 Race Exhaust.

My thinking is with clever use of inlet temp managment, and ignition timing it may be possible. No i dont want to go 20g yet, because i want to get maximum possible from the set up i allready have.

Im not ruling out ECU change, and look forward to any suggestions that you people may have.

Best figure so far 391bhp on Dyno Dynamics, but last figure on another DD dyno put me at mid 370,s (couple psi down on boost since remap, which i think is down to weak actuator).

Nearly forgot would like to do it on pump fuel ie. Shell V Power.

If it looks feasable i will move this to project section and share my results.

Jase.

renno rannes

I thought the 20g would have been doing well to make 400bhp on normal fuel, and that the 18g would be at or near its limit at 375 - 380 ????

Ill keep an eye on this thread as im intrested myself.

j900ase

Yes thats what im reading, but after speaking to tuner(s) i think it can be pushed a bit futher. Possibly with ecu change to allow more ignition at top end and run maf less.

Mocom Racing

iTrader: (2)

Although I've not personally run an 18g on a rolling road I very much doubt it.

j900ase

Why?

If by changing ecu to have better control of ignition, would you not get a few bhp here and by insulating inlet etc a few here, in terms of % its not that far to go.

j900ase

380bhp + 5.5 % = 400.9

Is it that close to maxium ignition boost etc at 380bhp that it cant be pushed that bit futher.

911

You can find the 400 by visiting a range of RR's till you get it...

I would have thought you were doing really well where you are.
The 20g is famed for top end over the 18G, but will cost you torque mid range.

I have the following and can get 407 bhp at Well Lane (optimistic IMHO) and had 380bhp at Powerstation (more like it IMHO)

Sti v3 2 litre
V8 TMIC, Green panel filter, Optimax with NF boost.
Walbro pump, 550cc injectors,parallel fuel rails, SX regulator, engine breather mod.
Apexi FC with Andy F mapping, Group B tube headers, 20g from AndyF ported.
Decat 3'' through system, all wrapped of course. Samco 3 ply inlet tract.

Now that is good spec for the engine which now has a Hybrid FMIC and a cone filter and re-map but never been back to the RR's.
No point as the car is faster!

Food for thought.

Graham.

ZEN Performance

You may get something from the V-power over Optimax on which the car was originally mapped. Personally I think it's possible but improbable. You may find what you're looking for with a set of headers, but this may detract from the original remit for your upgrades which were based on response and resistance to compressor surge and boost creep.

If you want a little more midrange and top end power, at the expense of a little spoolup, a set of headers might get you there.

Paul

Bob Rawle

You will get something from V-Power if thats not what was in it when mapped, also if you have already seen 370 and 390 its close, if the turbo you have is "a good un" then it may put out a touch more than normal, they don't usually get there but then nor does the 20G half the time.

Probably worth a shot at given how things seem to be at the moment. I know of at least one car who is very close if not there (WRX) but be prepared to "not quite get there"

cheers

bob

jasonius

iTrader: (1)

Typically what sort of gains are we talking about using v-power over optimax..? (everything else being equal of course)

Midlife......

iTrader: (2)

Ninnybobs has 404 BHP (I think) at Well lane on his 18G with suitable mods

Mine made 360BHP with a similar setup but just waiting for some more Bob Rawle Magic very soon

Shaun

WRX_Rich

iTrader: (5)

why not add a dose of nf, probably just as easy as having to find v power at every stop

im running a bigger turbo and still not hit the 400 but to be honest im liking the car so much an extra 5 % wouldn't be worth the cost of a remap fast is fast + or - 5 %

Shaun let us all know how you get on

j900ase

Which headers would you suggest?

Spool up not really prob allready spools so quick have had to turn gain down to 0 on boost controller to try and stop overboost.

Surge is a real problem on my car which is one reason i want to keep 18g, at moment i have closed loop boost set at 14.5 psi till 70% throttle.

911 Thanks for your input, but spent loads on car and i feel its not as far as it can go with current mods. If i was to go bigger would prob go 2.2, 2.5 and spun gt30 and go all out. Besides 400 is a nice number.

j900ase

Bob have you got specs of said car?

911

Why do people get surge?

My 20g and all that runs like my X type Jag. Turn on, start, idle.
Warm-up and the engine is instantly there, no fooling about.
Done this for 2 years, 6000 miles and 20 hillclimbs, absolutly no fuss no bother just ballistic punch abouve 4000 rpm.

Sometimes i wonder just how much even a modified Impreza chassis can tolerate? About 450 lbft I recon.

Graham

ZEN Performance

Because some people have faster spooling 20g turbos with different inlet pipes and intercoolers and so on, and also because most people don't actually know what it is and are obvlious to it, or it gets misdiagnosed for something else.

Headers wise I would, of course, recommend the tubular headers and 3 bolt flange up-pipe we sell!

Paul

RaymondH

Stupid question maybe, but what does surge feel like?

drewruberry

iTrader: (2)

hi all,

am really interested in this also. Whats wrong the the 20g turbos are they very laggy. I would also like to reach 400bhp or around it.

So far im around 300bhp what other mods would i need to reach as close to 400bhp as possible.

ive got 1993 wrx import with,

power fc & commander & andy f remap
decat
apexi induction kit
440cc inj
walbro fuel pump
fmic


All info is welcome

911

Ray, no idea! But imagine it is akin to pressing the throttle pedal up and down in succession as a 'pulse' repeated.

Paul is the expert but when i had a 20g on a V8 TMIC it was great, and now tweeked by AndyF and with a Hybrid FMIC all is..much the same but faster.

Graham
Sounds good?
http://www.dropshots.com/daymainfram...0030101&cimg=1

andy97

iTrader: (1)

Harewood, how did you do this time round?

Andy

Bob Rawle

Its Ninnybobs car, FMIC, 18G, usual other mods plus remap of oem ecu. Its a "good" car in my terms, virtually det free whatever you do to it.

If yours is like that then you might get v close to your target.

Boost makes torque timing makes power. (as long as you have boost of course b4 some wise man points that out)

bob

alanbell

iTrader: (6)

I had a 20g on my classic with lots of surporting mods But I never got 400bhp . Then I got a sti with a 20g fitted with a claimed 400 +bhp IT was 325bhp , It all depends on the rolling road AND the operater?????

stevebt

iTrader: (8)

but alan, mine and yours are 2 of the only 20g cars that make full boost by 3500rpm maybe earlier i doubt mine was 400bhp either unless i ran fuel additives ??? which is the main decider on all these turbo's

911

andy:

Much quicker this year than last due to AST changes to 3 way and a better set of soft tyres. Also, i sort of know the track now!

Can't remember the times but they were reasonably close to the local EVO lads (who were very very quick...).
Track/day was damp though, just ask David Wallis!

Graham.

Midlife......

iTrader: (2)

Hi Bob

is there any logic as to why Ninnybob's engine is so much better (than mine!) we have run identical mods / mapper for the last 4 years and his engine has performed roughly 10% better than mine. You have always described my engine as "sparkley", I have now resorted to Aquamist to keep the dreaded det supressed (don't mention the methanol )

Is it just the law of averages ? if you put a lot of monkeys in a room they will eventually produce a work of Shakespere.... if you have a lot of monkeys at Subaru will they eventually produce a blueprinted engine ?? LOL

Shaun

Bob Rawle

Answer no they won't, I see this a lot, some engines are virtually det free whatever you do and some det at any sign of anything, Martins is just very good, yours isn't a bad one in general terms.

I'll let you kinow what I think about the latest round after I've seen it again.

bob

j900ase

The best way i descibe how i get surge is, slight throttle opening then accelerate as if too overtake but then back off. This causes car to jerk violently till turbo stops trying to boost against closed throttle plate.

I belive mine is bad because of my Injen inlet and APS exhaust together they make my 18g spool very fast and at low revs. So turbo making boost but because engine not using/needing that amount of air it gets bounced back to compressor wheel, this trys to stall compressor wheel hence surge.

Bigger BOV can help and do, Im running a Forge recirc which is the best i have tried so far.

Jase.

j900ase

Thanks for every ones input, kind of confirmed what i thought.

Im going to go for some headers either Zen, RCM or Powerstation and will rolling road before and after to see if there is any improvment. Before this i will be insulating inlet and doin throttle body mod to try and reduce inlet temps, with a view to running more advance on ignition. I also need to adjust actuator to try and hold boost above 5500rpm where its dropping off.

All my rolling road figures have and will be done on a Dyno Dynamics rolling road, which should prove consistent.

Jase.

Midlife......

iTrader: (2)

Hi Bob....sorry to hijack the thread

I just wondered when you are booked in for re-mapping my car ?

Olly and the crew at Roger Clark have sorted me one hundred and ten percent beyond the call of duty but I guess by now they are all tucked up in bed .....LOL

J900ase..are you sure that's surge ?

Shaun

Bob Rawle

Hi Shaun, not been arranged just yet mate, Matt had been/was still working on the car when I was up there on Sunday mapping. Waiting for the call (I am away in China end next week though)