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Discussion Starter #1
Currently I have d15b2 engine with modified dual carbs. I would like to set up 4-2-1 manifold.
Does anybody have experience with the similar modifications and know which will be power increase? It would be interesting to hear some time results before and after manifold installation.
 

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Well I have a couple of 1/8 time slips . . .

Bone stock my 88 CRX DX automatic went a 11.6 @ 60
With a EBAY short ram, EBAY header, high-flow cat and a flowmaster 40 series it went some 11.25s or so @ 62.

I did take some weight out the second time around (spare tire and associated junk, plastic pieces involved with air box and a/c unit/lines). As well as made sure the rear tires were on 44 psi.

Don't know if this really helps or not considering it is an auto and it had DPFI at the time.
 
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