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Originally Posted by crazi-85crx
will a D16a1 fit in my 85 crx?, it's a carb'd 1500cc with nearly 300k clicks on it now.
P.S.- what exactly is a D16a1 motor anyway? how much better is it than what i got?
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Yes, a D16A1 will fit in your '85 CRX, but please read the whole thread for details.
The D16A1 is a dual over head cam (DOHC) motor that was available in the USDM '86-'89 Acura Integra, EDM '86-'89 Integra and '85-'87 CRX, and a JDM ZC version of the D16A1 was available in the '85-'89 Integra and '85-'87 CRX. The D16A1 was the predecessor to the B-series motors, but it shares no "bolt on" parts with either a D-series or a B-series motor. The head is similar to a B-series while the block is similar to a D-series, and NO, a B-series head will not fit on a D16A1, neither will any other D-series head. Some parts from D-series motors will fit, like the water pump, oil pump, connecting rods and throttle body, but the intake manifold, cams and distributor from either D or B-series will not fit. You can however bolt any '88+ D-series exhaust manifold/header onto a D16A1 with a little port matching, this also opens up turbo possiblilties without having to custom make an exhaust manifold.