Rare b20 P8R head question...
01-14-2005, 12:42 AM
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Rare b20 P8R head question...
I've read about the difference in combustion chamber bore between this head and the ls/normal b20 (81mm compared to the P8R which is 84mm) heads and my question is, will this head work ok on my 96 LS block?? I have searched and no one has actually answered this question....
01-14-2005, 06:01 AM
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Re: Rare b20 P8R head question... (EF8 ownz U)
It will, but you won't make any use of it unless you are running an 84mm bore.
Other than the larger diameter bore it is the same as your LS head.
Other than the larger diameter bore it is the same as your LS head.
01-14-2005, 06:12 AM
#3
Re: Rare b20 P8R head question... (HBoy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HBoy »</TD></TR><TR><TD CLASS="quote">It will, but you won't make any use of it unless you are running an 84mm bore.
Other than the larger diameter bore it is the same as your LS head.</TD></TR></TABLE>
Same size valves as vtec heads, and I'm 99% sure the head flows better.
Other than the larger diameter bore it is the same as your LS head.</TD></TR></TABLE>
Same size valves as vtec heads, and I'm 99% sure the head flows better.
01-15-2005, 04:35 AM
#5
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Re: Rare b20 P8R head question... (HBoy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HBoy »</TD></TR><TR><TD CLASS="quote">Good to know, I haven't gotten my hands on one yet. </TD></TR></TABLE>
Good luck. Seriously, B18C5 heads are easier to come by!
Good luck. Seriously, B18C5 heads are easier to come by!
01-15-2005, 08:26 AM
#6
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Re: Rare b20 P8R head question... (StorminMatt)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt »</TD></TR><TR><TD CLASS="quote">
Good luck. Seriously, B18C5 heads are easier to come by!</TD></TR></TABLE>
It appears that way!!
Good luck. Seriously, B18C5 heads are easier to come by!</TD></TR></TABLE>
It appears that way!!
01-15-2005, 08:52 AM
#7
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Re: Rare b20 P8R head question... (EF8 ownz U)
Ive been looking for one for almost 2 and 1/2 years now. But i still havent found one...within my price range anyway.
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01-15-2005, 05:19 PM
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Re: Rare b20 P8R head question... (Rocket)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket »</TD></TR><TR><TD CLASS="quote">I have a P8R head.
DO NOT put them on a 81mm motor.</TD></TR></TABLE>
Bad experience?
DO NOT put them on a 81mm motor.</TD></TR></TABLE>
Bad experience?
01-17-2005, 12:11 AM
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Re: Rare b20 P8R head question... (Rocket)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket »</TD></TR><TR><TD CLASS="quote">No bad choice.
NEVER EVER EVER run a chamber that is bigger than the bore.</TD></TR></TABLE>
Cool. I will just get a b20 bottom end then. No big deal.
NEVER EVER EVER run a chamber that is bigger than the bore.</TD></TR></TABLE>
Cool. I will just get a b20 bottom end then. No big deal.
01-17-2005, 12:29 AM
#13
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Re: Rare b20 P8R head question... (Rocket)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket »</TD></TR><TR><TD CLASS="quote">No bad choice.
NEVER EVER EVER run a chamber that is bigger than the bore.</TD></TR></TABLE>
I know not to use it on a 81mm block, but explain what will happen if someone were to do so.
NEVER EVER EVER run a chamber that is bigger than the bore.</TD></TR></TABLE>
I know not to use it on a 81mm block, but explain what will happen if someone were to do so.
01-17-2005, 08:00 AM
#16
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Re: Rare b20 P8R head question... (Dan GSR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dan GSR »</TD></TR><TR><TD CLASS="quote">im sure you would have major sealing issues, with using a 84mm head on a 81mm block</TD></TR></TABLE>
I knew that much, but I thought that there was some other dangerous factors.
Now in a normal B20 block, you would need to change the pistons to make this head work b/c the B20 Pistons have 31mm valve reliefs and the P8R head has 33mm valves, right?
I knew that much, but I thought that there was some other dangerous factors.
Now in a normal B20 block, you would need to change the pistons to make this head work b/c the B20 Pistons have 31mm valve reliefs and the P8R head has 33mm valves, right?
01-17-2005, 02:07 PM
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Re: Rare b20 P8R head question... (hybrid_vtec)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybrid_vtec »</TD></TR><TR><TD CLASS="quote"> I knew that much, but I thought that there was some other dangerous factors.
Now in a normal B20 block, you would need to change the pistons to make this head work b/c the B20 Pistons have 31mm valve reliefs and the P8R head has 33mm valves, right?</TD></TR></TABLE>
can anyone answer this?
Now in a normal B20 block, you would need to change the pistons to make this head work b/c the B20 Pistons have 31mm valve reliefs and the P8R head has 33mm valves, right?</TD></TR></TABLE>
can anyone answer this?
02-11-2005, 06:09 AM
#21
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Re: Rare b20 P8R head question... (joboost13)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by joboost13 »</TD></TR><TR><TD CLASS="quote"> i think they came on all the 97+jdm b20's.</TD></TR></TABLE>
no , not all of them
the p8r is still pretty rare
I've seen a lot more p75 equipped 99-00 JDM engines than p8r equipped JDM engines
no , not all of them
the p8r is still pretty rare
I've seen a lot more p75 equipped 99-00 JDM engines than p8r equipped JDM engines
02-12-2005, 08:45 AM
#22
Honda-Tech Member
no...do not put this head on an 81mm block!!!
it will in no way work without headaches and problems. As for the valve reliefs....this head will bolt onto any b20b/z without problems. Why would it? It comes on some JDM B20b's that use the same pistons as USDM B20b's that have the 81 mm P75 ls head.
it will in no way work without headaches and problems. As for the valve reliefs....this head will bolt onto any b20b/z without problems. Why would it? It comes on some JDM B20b's that use the same pistons as USDM B20b's that have the 81 mm P75 ls head.
02-12-2005, 08:54 AM
#24
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Re: (EF8 ownz U)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF8 ownz U »</TD></TR><TR><TD CLASS="quote">Word. I'm fixing my crx tonight and using a LS head instead. Not sure what Im gonna do with that P8R head yet.....Hmmm.</TD></TR></TABLE>
Sell it!
Sell it!