Cosworth Stage 2 Supercharger Install (Dyno,Tech,Photos,Videos)

[Rookie84]

Originally Posted by 350matt

so are you planning a custom tune for yours then?

who will you use?

I do not even have a 86 yet. Haha. I am just researching about possible options as I plan tp buy my car around fall of this year. If I do go FI after I buy a 86, OTS tune like Cosworth 2.3 or e-tuners like Delicious are pretty much my only option since there are no good fa20 tuners around in Korea.

[ajc209]

Im no expert on exhaust systems, but arnt the silencers one of the biggest restrictions?

I would have thought restrictive silencers on a 3inch bore system is worse than less restrictive silencers on a 2.5inch system?

The Cosworth Exhaust is VERY loud = less restrictive

[350matt]

As long as the silencers are straight through type then there's no difference in restriction levels

the noise reduction then comes down to the volume of the box
a big box = quieter exhaust

[ajc209]

Thats good to know. Cheers.

Given the price and noise of the Cosworth Exhaust, I will probably get Hayward and Scott to add a big silencer(s) to their manifold back and get a stepped cermaic coated mainifold from P&L or JDL.

Cosworth Exhaust costs £3500!!!

I dont plan to go stage 3 (though I am eagerly awaiting their stage 3 unvail - soon I hope) so 2.5inch is probably fine.

If it 260hp with stock exhaust, I imagine a full 2.5inch system should make up most of the 20hp for alto less than £3500...

[350matt]

I wouldn't expect the full 20Bhp for a 2.5" exhaust, for that much power you need a big pipe , hence Cosworths use of 3" pipe

you'll probably get an extra 10-12Bhp over the stock exhaust though

[GT86_PRAGUE]

Originally Posted by ajc209

The Cosworth Exhaust is VERY loud = less restrictive

Could you put some numbers on this?

[xkalelx]

@RallySport Direct Im interested in the MAP sensor Cosworth selected for this charger. Its hard to tell from the photos, I think this is the part number: 0 281 002 437? Is this MAP the same size and fitment as the OEM 5psi unit? It also looks like a 4pin connector (I'm assuming for integrated IAT) vs. the stock 3pin. Was there a jumper pigtail harness that came with the kit to connect the new MAP to the old harness?

Thanks! Awesome build by the way.

[350matt]

its a new Bosch 3bar sensor with integral temp sensor

and yes the kit includes a jumper harness to point the new temp input back into the ECU , replacing the temp input from the original MAF sensor