i'm on crack....P8R head on 84mm b16 block. knowlegde only...no faggot HT haters
11-27-2005, 10:44 AM
#1
3.0 BAR
Thread Starter
Join Date: Jan 2005
Posts: 2,877
i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
before anyone trys to persuade my not to do this, dont bother. this is what i have wanted for a while and no one will change my mind.
this spring i am going to build a 84mm b16 w/ a P8R head. the only part i am unsure of is the dowels and oiling. from what i understand it would be the reverse of doing an LS-Vtack. i would need to plug teh extra oil ports on the b16 bottom end. my question is what do i do about dowels?? do i even need them?
the build will end up like this
1707cc Low-Tec B16 9.2:1 CR
84mm B16 bottom end
Tuner toys rods
Wiseco 84mm +2cc dome pistons (unless craig can get me some SRP's with the right specs)
B20B P8R head
crower springs and ret
webcams custom cams, unsure of exact specs, ~460-470 lift, 268int/230-240ex dur mainly for extended RPM range
claiming 3 dependants on taxes pwns you
this spring i am going to build a 84mm b16 w/ a P8R head. the only part i am unsure of is the dowels and oiling. from what i understand it would be the reverse of doing an LS-Vtack. i would need to plug teh extra oil ports on the b16 bottom end. my question is what do i do about dowels?? do i even need them?
the build will end up like this
1707cc Low-Tec B16 9.2:1 CR
84mm B16 bottom end
Tuner toys rods
Wiseco 84mm +2cc dome pistons (unless craig can get me some SRP's with the right specs)
B20B P8R head
crower springs and ret
webcams custom cams, unsure of exact specs, ~460-470 lift, 268int/230-240ex dur mainly for extended RPM range
claiming 3 dependants on taxes pwns you
11-27-2005, 11:45 AM
#2
0.0 BAR
Join Date: Nov 2003
Posts: 0
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
its been done lots before, I think you need to drill the dowles in the head and block off the oil. I think the head gasket would block the oil anyways but a plug would be nice to make sure. Cheapest b series ever 
11-27-2005, 11:59 AM
#3
3.0 BAR
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Join Date: Jan 2005
Posts: 2,877
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
i hve seen a few thread on HT about it but it doesnt go into much detail about the dowels. what do they actually do?? if i dont absolutley need them i wont bother but if i do need them i dont know that to do about them
11-27-2005, 03:44 PM
#5
Administrator
Join Date: Dec 2002
Posts: 13,991
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
So its going to be sleeved right? 84mm aint gonna happen on a stock b16/b18 and Pr4/P75 heads are boat anchors.
Anyways to answer your questions, yes you need dowls, you'll need to drill the backside of the pr4/p75 head. And I dont think there are any other things you have to do, the oil should be fed through the middle oil oriface.
No offense, but this sounds kinda stupid.. I think the only reason a block should ever be done like this, is if you already have these parts laying around and you need to slap something together using stock parts. But actually buying Forged internals and trying to build something like this?... eh I dunno man sounds like a wate of time.
Anyways to answer your questions, yes you need dowls, you'll need to drill the backside of the pr4/p75 head. And I dont think there are any other things you have to do, the oil should be fed through the middle oil oriface.
No offense, but this sounds kinda stupid.. I think the only reason a block should ever be done like this, is if you already have these parts laying around and you need to slap something together using stock parts. But actually buying Forged internals and trying to build something like this?... eh I dunno man sounds like a wate of time.
11-27-2005, 03:56 PM
#6
3.0 BAR
Thread Starter
Join Date: Jan 2005
Posts: 2,877
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
its a p8r head not a standard ls/b20 one. 84mm comb chambers and 33mm int valves. it has been flowbenched and flows within 10cfm of a b16 head.
if it turns out shitty (which i doubt) i can sell the block and have enough money to buy a b20 bottom end and new rods and still put a few dollars in my pocket
if it turns out shitty (which i doubt) i can sell the block and have enough money to buy a b20 bottom end and new rods and still put a few dollars in my pocket
11-27-2005, 05:10 PM
#7
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Join Date: Dec 2002
Posts: 13,991
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
Even if the P8r head has 84mm comb chambers you wont be able to use 84mm pistons in a stock sleeved b16a, and running forged pistons in a B20 is just a ticking timebomb. Siamese monolithic designed sleeves maybe bigger than b16/b18 sleeves but are by far the weakest of the bunch.. 300whp wont even last.
11-29-2005, 09:55 AM
#10
1.0 BAR
Join Date: Dec 2002
Posts: 604
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
do you already have a b16a head? i mean i understand that the p8r head flows close to a b16 ive seen the research ( i want one myself for my b20) but its really not about flow. if you really dont like vtec they make aftermarket rockers that allow the use of only the vtec lobes and reduce valvetrai weight.
the main drawback isnt really any 1 of the parts you want to use its the combination. seriously a sleeved 84mm b16 will want to be revved to at least 9k maybe more. a p8r head as good as it will flow still has LS rockers that cant support rpms much over 8k. unless you have a solid proven idea how to get more rpms out of the valvetrain (ive already thought of how to make roller followers work so no copying me
) i woulndt start this idea.
seriously the b16 head has a better oiling system than the ls , heavier duty cam caps, and shaft mounted rockers. for high rpms go with a b16 head. now if you want to put a LS crank in there with custom pistons now were talking. no real need to go over 8500 rpm's and youll make sick tq. AND youll still have a b16 block with p8r head. youll certainly suprise some people with that.
feel free to IM me or whatever if you want, i got a good deal of non vtec experiance.
the main drawback isnt really any 1 of the parts you want to use its the combination. seriously a sleeved 84mm b16 will want to be revved to at least 9k maybe more. a p8r head as good as it will flow still has LS rockers that cant support rpms much over 8k. unless you have a solid proven idea how to get more rpms out of the valvetrain (ive already thought of how to make roller followers work so no copying me
) i woulndt start this idea.seriously the b16 head has a better oiling system than the ls , heavier duty cam caps, and shaft mounted rockers. for high rpms go with a b16 head. now if you want to put a LS crank in there with custom pistons now were talking. no real need to go over 8500 rpm's and youll make sick tq. AND youll still have a b16 block with p8r head. youll certainly suprise some people with that.
feel free to IM me or whatever if you want, i got a good deal of non vtec experiance.
