Current set up:

F20C 60K
MASE manifold
2.5" Down pipe.
ID 1000s
AEM EMS V2
Mishimoto M-Line Race Intercooler
4bar Map sensor
Garett TR30R (Rally Spec) Turbo Charger.
walbro 255 fuel pump
2.5" DMS Dual Exhaust




Anyone who knows the TR30R will know why I'm now upgrading my turbo. The TR30 is an amazing piece of engineering in fact that it can take 3 bar (42 psi) of boost and maintain long periods of high temperature with it's bearings cases made from M50 material and the retainer from silicon-bronze.

But it just doesn't work on our engines well.. The wheel diameter is too small and thus the turbo is choked @ around 7,000 RPM.




I have managed to get myself on a refurbished GT3076 for a very good price and intend to fit it next weekend with a remap.

A couple of questions on this:

My power goals are 400whp on a conservative map, running 98 octane fuel.

My worry is that the 2.5 down pipe and exhaust will restrict this so wouldn't want to have to map it twice. Any real life experice / advise would be appreciated..

Also the TR30R is now up for sale, granted not an ideal charger for the SK2 but simply amazing on a less revy car with a built motor which can handle high boot (rally cars... )

 

Jeez did you try nearly 2 bar on this engine? If you did or didn't want run nearly 2 bar what rpm did you fully spool by?

Honestly a 2.75 inch downpipe isn't restrictive and I'm running a gt35r.

I have a 70mm dp to 76 centre section to a non restrictive Y peice to 60mm piping to back box - dual system so technically 3 inch all the way through bar the downpipe. Measured back pressure and it was virtually non restrictive at 0.2 psi, so I think you'll be fine for the time being but being 3 inch wouldn't hurt.

 

400 on pump with a log manifold, the 98 octane gives you a advantage but I would say you will need a 3" to see 400 hp without pushing it.

 

I really hope not mate!!!

I have been on to my tuner to ask why it reads that as the standalone Apexi boot controller is limited to 1bar (14 psi).. The MOST I have ever seen it go to is 1.01 bar..

Not sure why the dyno reader would show such a high reading but am awaiting his response. I'd also hope if would have made more power than 288hp @ 2bar!

Hmm, OK my system is 2.5" the whole way through.. I have the opportunity to swap my DMS 2.5" twin (Which I love the look and sound of) for a 3" Single Megan Drift spec system.. Would just mean I'd need to fab a new DP and from what I can see there isn't much room down there as it is to get another 1/2 inch!!

If you don't think it will restrict me reaching my power goals then I will most likely keep my current set up.

 

He's running the Mase manifold which is a sidewinder, not a log manifold. Idk why he's calling it a log, but the placement of the turbo makes it obvious that it is not a log style manifold.

With 98oct fuel, the gt3076 and a good tune, 400whp shouldn't be a problem on that kit. Just a reminder however, that manifold is extremely notorious for cracking.

 

It's a good manifold but cracks, mines secondhand and had a new manifold, I also run one.

I reckon 16 psi should see 400whp bhp no problem.

Just put a barb fitting attached to a vacuum hose and measure pressure where the O2 sensor would usually reside on the downpipe.

 

I actually thought MASE manifold was a "Log" manifold. I stand corrected, Will update my original post.. Based on your feedback so far I will be going for tune on the current kit and update you all with numbers next week

I know about that cracking all to well as the previous owner had it repaired once already... If it happens again then I will be looking to replace / upgrade but for now it seems to be holding up OK but adding a larger heavier turbo won't help things!

 

sorry I had pics disabled on my phone.

I see now on my desktop its a sidewinder.

 

So I have taken a look at the log manifolds and am now schooled.. :-)

The question is, is this sidewinder manifold less or more restrictive..? Either way I've decided to map the current set up and report back, just wondered which is the better manifold for flow.?

 

It's not as good for spool than a log but better for power.

And you can set vtec lower on a log vs tubular.