B20 cam
Junior Member
Joined: Sep 2006
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Sorry dude, the B20A is a hunk of crap. They have a really nasty habit of excessive ring wear, mosty due to the horrible loading issues with a 1.51 (1.49 in the B21) R/S ratio.
Any engine can be made to perform (the Mazda F2 comes to mind,) but some should just be left alone.
Any engine can be made to perform (the Mazda F2 comes to mind,) but some should just be left alone.
my B20: call me out.
Last edited by Sunburn; Sep 12, 2006 at 03:55 PM.
Thread Starter
I'd hit it =P
Joined: May 2006
Posts: 343
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From: District of Columbia
Thats ok Sunburn. I already sent a B20 head to the shop to get a port and polish. Amazing how small the ports are and even more amazing how MUCH you can bore out ;-) Also found a set of carbs that will work with some much larger jets. Im still on the fence about talking to Gude about a cam. Might just be better to get a custom grind high lift cam from someplace else.
Who says you need fuel injection? Looks to me like carbs worked fine for almost an entire decade.
Who says you need fuel injection?
Looks to me like carbs worked fine for almost an entire decade.
Junior Member
Joined: Sep 2006
Posts: 6
Likes: 0
Sorry dude, the B20A is a hunk of crap. They have a really nasty habit of excessive ring wear, mosty due to the horrible loading issues with a 1.51 (1.49 in the B21) R/S ratio.
Any engine can be made to perform (the Mazda F2 comes to mind,) but some should just be left alone.
Any engine can be made to perform (the Mazda F2 comes to mind,) but some should just be left alone.
The b20a and b21a have a lot of over lap. You can make pretty decent gains with cam gear alone.
I got into the high 15's with just cam gears and a gutted cat.
http://www.preludepower.com/forums/s...highlight=cams
Last edited by Omegasupreme; Sep 16, 2006 at 06:31 AM. Reason: forgot to answer the orginal question.
Thread Starter
I'd hit it =P
Joined: May 2006
Posts: 343
Likes: 0
From: District of Columbia
Will cam gears made for the FI B20's work on my b20a3?
And as far as the FRM goes. Look at it this way. If you drop compression just replace the rings. Its likely the walls are still in pretty good shape.
And as far as the FRM goes. Look at it this way. If you drop compression just replace the rings. Its likely the walls are still in pretty good shape.
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Joined: Sep 2006
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No, they won't work with a b20a3. Its going to cost some $$$ to get decent gains. If you upgrade the cams your need to do something to the stock carbs. From what I understand the there pretty restritive. Webbers aren't cheap.
Depending on your skill level and dearing you could swap on a b20a5 head and keep the carb setup. That way you can get cams and headers. You can use mega squirt to run the ingition system. Hell with the mega squirt you could go FI or individual throttle body.
Depending on your skill level and dearing you could swap on a b20a5 head and keep the carb setup. That way you can get cams and headers. You can use mega squirt to run the ingition system. Hell with the mega squirt you could go FI or individual throttle body.