MC tweaks

[Cody]

I have a few questions about simple tweaks for power on an MC engine in a '87 5ktq. I'm not quite satisfied with the power I have in the EFI car (I highly doubt I EVER will be satisfied no matter how much it has), but I can't spend the cash for the T3/T4 and header right now, so I'm wondering what more I can do to get a bit more out of it with what I have. 

First thought is I remember somebody mentioning porting the collector of the stock header. Whats the full story there? As far as the rest of the exaust I'm running no cat and I removed the rear muffler. 

The biggest issue I see now with the stock turbo is that it just can't match the flow I'm requesting from it. With the boost set at 2.4bar absolute I get great mid range power, but after about 3000rpm the boost starts to drop until arround 4500rpm it levels off at 2.0bar. I have heard of people porting thier turbos, but my thoughts on that go with the compressor is supposed to have a very specific clearance at the inlet and porting would mess with that. I fully understand that my biggest restriction right now is the stock EM and turbo, but like I said I can't afford to change them right now. I was thinking of checking out the specs on 944 turbos, I have a bunch of them laying arround. I also have a k26/k27 hybrid, but last time I tried to fit it I found that it hits the alternator. Maybe I'll try that again with a smaller alt belt now that I think of it.

I plan on porting a head to put on it this week, and matching the intake manifold to the ports, but I don't expect much from that. I think I havfe an adjustable cam puley (it's for a 924, not sure if its the same, I'll look today) so I may tweak the cam a touch. Are there any other tricks for these motors, or any other suggestions?


-Cody Forbes
Black Forest Racing
2x '86 5ktq
'87 5ktq EFI
'88 80 4cyl