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3geeandEF · **Posted:** Mon Jun 25, 2007 9:26 pm

doing a b20 build up from my previous b18a1 setup. question is does my PR4 head flow better than then b20z?

jcushing · **Posted:** Tue Jun 26, 2007 5:05 am

a b18b/b20z head should flow better than a b18a. the ports are slightly smaller on the b18a. most of the difference between the b18a/b though is cams/IM etc

IBleedJDM · **Posted:** Sun Jul 01, 2007 10:50 pm

jcushing wrote:

a b18b/b20z head should flow better than a b18b. the ports are slightly smaller on the b18a. most of the difference between the b18a/b though is cams/IM etc

I agree 100%
Correction: B18A I know you meant that I do the same shit when I get in a hurry LOL

jcushing · **Posted:** Mon Jul 02, 2007 3:31 am

yeah i edited my response...

klungemonger · **Posted:** Mon Jul 02, 2007 6:22 am

3geeandEF wrote:

doing a b20 build up from my previous b18a1 setup. question is does my PR3 head flow better than then b20z?

A PR3 head? Considering it is dohc VTEC yes it does flow better...or do you mean PR4?

jcushing · **Posted:** Mon Jul 02, 2007 9:46 am

i assumed he meant pr4 not 3 since pr3 is a b16 head

3geeandEF · **Posted:** Mon Jul 02, 2007 10:22 pm

yeah my bad, i ment pr4

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which head will flow better?

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