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Discussion Starter #1
Hi all, are 66 Ib injectors too big for a stock block, stock cam, gt-40 head/intake 306 w/ a 68mm @ 6 psi? I was worried the idle may be too rich. Tuning will be with Holley HP efi if that matters. Thanks!
 

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Absolutely not. I wouldn’t recommend anything smaller than 60’s personally with anything under boost. You can tune everything with that Holley, so don’t worry
 

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Discussion Starter #3
Thanks for the reply. It just seemed back in the day people ran 42Ib injectors with a set up like this, but that was with SCT chips for the tune.
 

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They also probably ran a FMU too. Don’t do that. Run a big enough injector and fuel pump.
 
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