GBruce

Hi,

At what boost would you run a TD05/06 20g on a 98 UK car with standard engine internals?
Was going to try 1.4 bar held all the way, but after talking to an engine mapper at G-Force on Saturday he suggested that the engine may not like this and it would be better to drop to say 1.3 bar towards the top end of the revs.

If you're running one of these turbos on a uk car with standard internals what boost do you run?

Thanks


George

Andy.F

Hi George

"but after talking to an engine mapper at G-Force on Saturday he suggested that the engine may not like this"

Did the engine tuner say why he thought this ? Has he had any experience of this turbo on an Impreza (or any car for that matter ?)

I know of 4 UK cars with std internals running 1.4 bar+ held.
Alan G's was the most recent and made 415 bhp. John Banks has run his over 1.6 bar in the past and the engine was still going strong when it was removed a few months ago to make way for the 2.5
IMO as long as you keep the RPM limited to 7000rpm and the mapping is done correctly, there should be no problem.
Tailing the boost off to 1.3 bar after max power point (approx 6400rpm) is sensible and perhaps that is what he was meaning ?

There are a number of early cars (uk&jap) running this level for some time now and I would expect that if any problems are going to show, it will be with the higher mileage cars.

Andy

Fangoria

iTrader: (1)

1.4 bar held - properly mapped should not really be an issue on standard internals until the max peak at say 6500 rpm, then you can reduce it so say 1.3 bar

I guess they are just covering there backs and being prudent - its like the early days of Scoob tuning, when people were doing a lot of this and Scoob engines have turned out to be much stronger than people thought

[Edited by Fangoria - 1/28/2004 4:19:45 PM]

Andy.F

Yea, turn the boost down George They gota keep the APS demonstrator lookin good eh Steve

Denmark

iTrader: (2)

Right now ,when it´s so cold,i going 1,5bar all the way to redline,but this is with a STI shortblock

It´s fun now

Skassa

GBruce

Hi,

So you think 1.4 bar and then down to 1.3 at 6400 would be the way to go then? It was the comment about rods and pistons not being stong enough that's got me worried. Coming up for 80,000 miles now

Got my Tony law equal length headers fitted, has added a bit of lag low down but midrange and top end seems better, still not sure I like the sound though. I think i'll try them for a bit and see how I get on.

Thanks


George

Fangoria

iTrader: (1)

Its horses for courses - we can say you 'should be ok' based on many other examples on UK cars...... but then your engine could go bang and you'd be really upset........

From what I've seen over the last 4 years - Richard Wild on a UK engine (an N plate I think?) was running at least 1.5 bar all the way to the redline and hasnt had a problem - apart from the odd gearbox or 2...... Many have done the same...... and have had no issues

For prudence I would run 1.4 bar to 6500 and then go to 1.3 bar.... as like stated you wont get much more after 6500rpm

Dont G Force run 1.55 bar with that huge Turbo and then drop it to 1.2 at the top end - but then thats on the APS SR40 I think.... - thats a bit high for normal boost - but then its higher up that things tend to go pear shaped!!

I'm running circa 1.6 bar on mine for 420bhp and lots of advance - but then I've gone internal on my car...... - some out there used to run up to 1.7 bar on std internals on the td05/06 but realised that they could get just as much power at 1.45 bar with a lot of mapping tweaks........ Andy has had no probs but then I think he runs sti pistons - so not quite the same............

If it was me I'd be running 1.4 all the way to the red line - but then I'm not you...... ooops not being much help here

Chungster

So that's why the guy at santa pod with his 400bhp G-Forced STI8 said the engine runs 8x850cc injectors!

I was wondering isn't that a bit of an overkill.

Now I get it.

M0NEY

Alan G on std uk internals uses 4x740s and hits 415bhp at 1.4

Rob had 420bhp on his std wrx with 4x550 injectors

You will be fine

Seems like more and more people are finding out standard internals are pretty good. Its the Uk gearbox that aint. lol

Fangoria

iTrader: (1)

rob must have raised the pressure on a regulator as I am in the 80's at 420bhp on G Force on 740's - hence 550's would be fully maxed out (

StickyMicky

the lad did say he was running standerd management as well lads

saw a few replies with "mapping" in them
does this advice follow for sumbody on a standerd uk map?

AlanG

I was 83% on my 1st run at Star and 75% by the 4th run after i had leaned some of the map area. That was on 3.2 bar idle pressure.

Alan

Andy.F

Alan/Steve

Not sure that you can directly compare Link IDC's with others. I believe the Link reports IDC as a %age of the maximum recommended injector duty cycle, hence you can run them at 105% for example and increase fuel flow over the 100% mark.

Andy

AlanG

Andy
Wasn't comparing my IDC's with others, only as a general point of interest with Steve commenting on his IDC's from the Link

Alan

loscooby

Hi,

Andy or someone with experience in running the td05/06 20g on a STi8(My03)...

What about using the td05/06 20g on a STi MY03 with std. internals, how much boost and power can the STi take with a modified ECUTEK-map?

/L-O