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Sully90SiPrelude · 02-21-2007, 09:51 AM

Yall are wrong.

The 3rd gen prelude(88-91) has a b20a3/5, or b21a1. JDM motor is b20a. No VTEC.

This motor has NOTHING to do with the rest of the B series. It is NOT interchangeable with a b16/17/18/b20b/z

Motor mounts are NOT the same with the b20a, and any other b series. Nobody makes them. They would be custom.

If you want a swap, go for an h22. Check out this preludepower.com, look around. Azrace+machine recently made h22 mounts for this car.

An h22 will not adversely effect handling to any degree, it's something like 20 pounds heavier than the b20. And it sits really far back in the engine bay.

People have done a b16/b18 head swap. From what I understand, it's the same thing as an LS/Vtec, but you have to move/create 3 bolt holes. However, this isn't as beneficial as you thing. Thsese motors have a very strong tendency to throw a connecting rod(#3, usually) if revved over 7000. So you'd need custom cams for the head as well.

Boosting the b20 would be best. People are running 300+ on stock sleeves, they have thick iron sleeves from the factory, and stock internals can take 220 at the wheels, 240 with a perfect tune.

02-21-2007, 09:51 AM	#4 (permalink)
Sully90SiPrelude Junior Member Join Date: Feb 2007 Posts: 1	Yall are wrong. The 3rd gen prelude(88-91) has a b20a3/5, or b21a1. JDM motor is b20a. No VTEC. This motor has NOTHING to do with the rest of the B series. It is NOT interchangeable with a b16/17/18/b20b/z Motor mounts are NOT the same with the b20a, and any other b series. Nobody makes them. They would be custom. If you want a swap, go for an h22. Check out this preludepower.com, look around. Azrace+machine recently made h22 mounts for this car. An h22 will not adversely effect handling to any degree, it's something like 20 pounds heavier than the b20. And it sits really far back in the engine bay. People have done a b16/b18 head swap. From what I understand, it's the same thing as an LS/Vtec, but you have to move/create 3 bolt holes. However, this isn't as beneficial as you thing. Thsese motors have a very strong tendency to throw a connecting rod(#3, usually) if revved over 7000. So you'd need custom cams for the head as well. Boosting the b20 would be best. People are running 300+ on stock sleeves, they have thick iron sleeves from the factory, and stock internals can take 220 at the wheels, 240 with a perfect tune. Last edited by admin; 02-21-2007 at 11:48 PM.