I have some questions for my engine build.

me97gt

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While my short block is at the machine shop, should I have the crank cut for a full length key? Just curious at what point is it needed. I also would like to know what size injectors I should run with my setup on 93 octane? I was thinking 39lb but not sure if the spray pattern for those are ok for a 2v.

My build is:
38cc tfs heads
Ported SVO intake
CMS stage 3 na cams tfs spec
Long tubes
Lightning maf
Teksid block with my 97 GT crank, coyote rods and 9cc CP pistons.

TIA


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Cobra52898

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I’d go with the forged steel Cobra crankshaft from a 96-04 4.6L. They are fairly easy to find and good to 1,500 HP (when properly prepared). A good investment for lower end strength, especially if you decide to up the power later on. Reportedly cast steel GT crankshafts are only good to about 500 HP.
 

Cobra52898

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As for injectors I tried 39’s with an FMU (SC’ed engine) but finally went with Seimens-Deka 60lbs/hr injectors and adjustable FP regulator w/manifold pressure port. That allowed me to delete the FMU. And was able to get a great tune.
 

Stanger00

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Dang 9cc piston and 38cc chamber. What kind of compression you expecting?


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me97gt

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My goal is to stay na, probably for a while, have fun car for the street.
11.6-1 is what I figured.
I figured the original crank key and cams might be a problem. My tfs crank gears are pinned if that matters either way.


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me97gt

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Are 39lb injectors too much? Or spray pattern too crappy for na? Can 30’s get the job done safely?


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Deceptive

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I don’t see any reason it is needed for your setup.


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