RobScreene

Once my car is out of warranty (!) I will be thinking of a remap. Unquestionably in my opinion, the Poweer Engineering solution seems to be the best reliable way to go at the moment.

What really interests me is to get instant low-down torque from cruising revs.

You see, it really bugs me that UK cars share the turbo with the WRX and just seem to be de-tuned to be oversafe on UK unleaded.

I know that the PE remap is very thorough, it does increase peak boost although the failsafes are left operational and no faults have been reported as yet with this conversion.

My question is, what happens if the remap is done on 98 ron SUL and then the car is run on normal Unleaded?

Would the already reduced safety margin be further compromised?

What would the reduction in benefit be if an ITG panel filter was used with a stock UK exhaust?

cheers,
Rob.

[This message has been edited by RobScreene (edited 06-10-1999).]

Bob Rawle

If you want to run 95 ron then the car should be remapped on 95 ron, 98 will make a big difference and its going to be harder for PE to set it up to run with both. They can get very good gains with 95 !!

RobScreene

I see. What sort of reduction would there be, if remappped for only 95 ron unleaded?

In an idle moment, I overlaid the following dyno plots from Paul Strong's great reference site.

I chose the slightly better of the two remaps, both of which were using 98 ron SUL.

Bob Rawle

A recent post showed about 265/270 bhp and 275/280 ft lbs at 3500 rpm if I remember correctly , really its down to setting up the car slightly differently, ie less boost, more advance maybe. Talk to David Power, hel'll explain it all to you.

strong

>You see, it really bugs me that UK cars share the turbo with
>the WRX and just seem to be de-tuned to be oversafe on UK unleaded.

I assume you are talking about a Japanese WRX (not the Aussie one which is the same as the UK Turbo).

The Japanese turbos are not the same, they are larger, hence the turbo lag you can see in the red line above. A WRX doesn't get going 'til around 4000 rpm while the smaller turbo on the UK cars pushes you into your seat from 3000 rpm. So the UK car is not just a detuned WRX.

Paul.

RobScreene

Good point Paul. I was thinking of the Japanese WRX.

Why does the aussie car have a bigger turbo then?

cheers,
Rob.

Bob Rawle

Rob don't think that the Oz car has a turbo thats bigger than a UK car ... spec is the same in that respect. Jap spec cars use a range of turbos dependant on model year. they started off being quite laggy cos they were significantly bigger but have reduced in size as the MY has changed. Still bigger than UK/Oz spec though.