mapping a standard sti

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11 February 2011, 09:08 PM

99greenwagon

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mapping a standard sti

hi,just wondering what gains will be had by mapping a standard 1998 sti type r with an apexi power fc? car is completely oe with oe exhaust in place.i dont want to change this as i need to keep car quiet. i would rather just have it mapped for uk fuel with possibly a walbro and 3 port?
car is running standard power as was dyno tested at alan jeffery enginnering........267/251.
thoughts please??

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11 February 2011, 10:38 PM

myblackwrx

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My Type R with a remappable ecu and standard exhaust is 300bhp on 99 RON

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11 February 2011, 10:55 PM

99greenwagon

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Quote:

Originally Posted by myblackwrx

My Type R with a remappable ecu and standard exhaust is 300bhp on 99 RON

with no other mods at all?
is that with apexi power fc?

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11 February 2011, 11:00 PM

myblackwrx

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Think it has a Walbro fuel pump/3 port and the ecu is a Simtek but imo the ecu shouldn't make much difference just the person who maps it.

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11 February 2011, 11:08 PM

99greenwagon

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Quote:

Originally Posted by myblackwrx

Think it has a Walbro fuel pump/3 port and the ecu is a Simtek but imo the ecu shouldn't make much difference just the person who maps it.

so was this with both the cats still in place(downpipe and mid section) and the original sti backbox?
what is the torque figure?

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11 February 2011, 11:25 PM

myblackwrx

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Completely standard exhaust (exactly as you mentioned)

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11 February 2011, 11:29 PM

99greenwagon

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hmmm,i know every car is different but mine was mapped inly a few weeks ago,completely standard and achieved 267/251.so surely i can expect over 300 bhp with 3 port and walbro?
any reasons why your first dyno test was down on power as 238 seems quite low for a standard type r?

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12 February 2011, 12:06 AM

myblackwrx

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That's at the wheels

I just posted it to show the boost.
These dynos are actually from the person I bought it off but I've not changed anything since.

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12 February 2011, 12:15 AM

99greenwagon

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Quote:

Originally Posted by myblackwrx

That's at the wheels

I just posted it to show the boost.
These dynos are actually from the person I bought it off but I've not changed anything since.

oh,i see,so you dont know the power before simtec was fitted,thanks for your info,you have clarified that 300 is doable with cats in place.

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12 February 2011, 12:18 AM

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99greenwagon

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that seems large gains from just the ecu,pump and 3 port,that means i would gain in the region of 30-40bhp and 40-50lb ft,does that seem reasonable?

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12 February 2011, 12:26 AM

#11

myblackwrx

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Before

OE ecu was faulty allegedley hence why the guy had the Simtek fitted.

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12 February 2011, 01:35 AM

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chocolate_o_brian

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I would personally get a quiet decat and then map it. More gains. Alcazar on here has an uber quiet 3" system and runs over 400 of each on a 2.5l bottom end. It's very subtle.

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12 February 2011, 10:04 AM

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BLACK V5

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Quote:

Originally Posted by 99greenwagon

so was this with both the cats still in place(downpipe and mid section) and the original sti backbox?
what is the torque figure?

You only have a cat in the downpipe. Centre is just a resonator pipe.

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12 February 2011, 12:31 PM

#14

99greenwagon

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Quote:

Originally Posted by chocolate_o_brian

I would personally get a quiet decat and then map it. More gains. Alcazar on here has an uber quiet 3" system and runs over 400 of each on a 2.5l bottom end. It's very subtle.

no,im not doing that mate as cant be arsed with the hassle at mot time etc.

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12 February 2011, 12:33 PM

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99greenwagon

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Quote:

Originally Posted by BLACK V5

You only have a cat in the downpipe. Centre is just a resonator pipe.

oh i thought the centre pipe had a cat as well, why would u buy a decat centre pipe for a classic then?

i thought my old uk 99 turbo had a cat downpipe and a cat midsection!

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12 February 2011, 01:11 PM

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chocolate_o_brian

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Quote:

Originally Posted by 99greenwagon

no,im not doing that mate as cant be arsed with the hassle at mot time etc.

Not if you get a sports cat downpipe. Will be quiet too. But if you want to waste remap money just for fueling purposes when you could get more power with a quiet cat back system... Your car.

Quote:

Originally Posted by 99greenwagon

oh i thought the centre pipe had a cat as well, why would u buy a decat centre pipe for a classic then?

i thought my old uk 99 turbo had a cat downpipe and a cat midsection!

No it didn't. I had a MY99 uk turbo too and can confirm it has ONE cat in the downpipe. The centre resonator keeps the noise down. I had a decat nur spec r on said uk turbo which had a resonator in the centre section. Helped with motorway drone.

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12 February 2011, 01:18 PM

#17

99greenwagon

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Quote:

Originally Posted by chocolate_o_brian

Not if you get a sports cat downpipe. Will be quiet too. But if you want to waste remap money just for fueling purposes when you could get more power with a quiet cat back system... Your car.

i dont feel that it would be a waste at all,as u can see from the above graphs that there are plenty of gains to be had without removing the catted downpipe.i realise you would get more from a decat/sports cat,just not really what i want to do with this car.

thanks.

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