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proffighter proffighter is offline
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Join Date: Aug 2007
Location: Switzerland
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Originally Posted by TurboKraft View Post
Stock plastic CIS injector blocks are prone to cracking and warping, even with standard 32mm bore and standard thickness walls.
The factory bored them to 36mm on some S/SE engines, and they failed sooner still.
Try to go larger, and the walls get really thin.
Somewhere in the shop we have a ported one that blew the side out at 1.0bar boost.

Thus aluminum injector blocks and thermal insulators. No more warping or cracking.
I used them bored for a couple of years without any issue. Maybe the age of the blocks are a factor too. But no doubt, risk is higher and I can only agree to your statement Chris

PS: I have to say (as a lightweight fetish), the aluminum blocks are a lot heavier

930 Turbo '81 Too many modifications to list
Old 02-19-2013, 10:18 PM
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