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GJF GJF is offline
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Join Date: Dec 2004
Posts: 765
Think about it this way. If you just built the motor stockish, bump the compression to 8-8.5:1 You can do this both with a set of Mahle 3.4 P&C's or go with a more robust combination and do JB cylinders and J&E pistons these will probably give you the most strength and insurance and add the 964 cams. For the heads, if you stay CIS then you chould stay with your heads and rework them (I am getting to the point soon). If you go EFI you can simply swap them for a set of 3.2 Carrera heads and literally not touch them except for a fresh valve job. I'm gonna hear a bunch of CRAP for that one. Which brings me to the topic of EFI............................................... .................................................. ....
OK..... The change can be or will be a fustrating one, especially listening to many self claimed gurus out there. Funny thing, it isn't all that hard of a decision to pick a reliable and ease of use EFI system. But for some this is their Mt. Everest. Reguardless of their short comings the change alone without any HP added to the equation will make the car drive completely different. Drivebility and response will be night and day, and will give you the flexability to increase power far more easier in the future. Yes you can make the 400HP mark with CIS but, you still have heat soak problems on the track due to the required turbine housings to work with CIS. And poor low speed drivability in comparision to EFI.
Then if you need to replace the turbo go with a GT series Garrett, possibly a GT35R or if you stay CIS the K27HF, as it works best with CIS.

So this would be a good build and again it is just an opinion for your wallet.

Mahle or JB cylinders and J&E pistons 3.4 8-8.5:1 compression
Carrera heads twin plugged
964 or GT2 EVO cams or even 993 Super Sport cams
Carrera intake manifold or convert your 930 to accept fuel rails
C2 intercooler or larger
Garrett GT35R (K27HF for CIS)
YOUR choice of EFI
55lbs or 72lbs injectors if you don't want more than 400 the go with the 55's

And really since you were planning on spending the money for a crank triggered ignition for a little more money this would get you the EF system that would have this very system incorporated into it. This combo would give you phenominal performance and a huge performance threshold.
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87 911 Carrera platform
Twin Garrett's, Big Valve, Xtreme Cylinder Heads, JB Racing cylinders and machine work, custom JE pistons, GT2 EVO cams, GT3 oil pump, modified 3.2L intake, 80mm TB, custom Intercooler, equal length headers, DFI, KEP Stage 2 custom twin disc, G50 custom gear set, LSD, Tilton trans pump, Fluidyne cooler
Old 09-21-2008, 08:33 AM
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