i'm on crack....P8R head on 84mm b16 block. knowlegde only...no faggot HT haters
11-30-2005, 12:05 PM
#11
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
one idea to help the b18b head, custom make something like this
http://www.tomei-p.co.jp/_2003web-ca.../e099_ras.html
http://www.tomei-p.co.jp/_2003web-ca.../e099_ras.html
11-30-2005, 07:03 PM
#12
0.5 BAR
Join Date: Oct 2005
Posts: 83
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
Originally Posted by Jcushing
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.
only thing is to get a LS crank to fit is you half to remove the oil squirters and clearance the block. Also this in turns causes a problem. The stock stroke of that motor was 77mm and now is a monster 89mm - this means that the piston would go past the block deck. there are 2 logical ways to fix this. have some custom shortened rods made (which will hinder rpms even more) or have the B16 sent to ERL performance and have the superdeckII performed. they will put in dart sleves bore it to 84mm and grind the appropriate deck to have off the shelf rods fit. The second decision would be the bes cause you get 2 birds with one stone.
just my 2c.
11-30-2005, 07:58 PM
#13
3.0 BAR
Join Date: Aug 2003
Location: NE-PA
Posts: 4,666
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
Originally Posted by Importordomestic
Originally Posted by Jcushing
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.
only thing is to get a LS crank to fit is you half to remove the oil squirters and clearance the block. Also this in turns causes a problem. The stock stroke of that motor was 77mm and now is a monster 89mm - this means that the piston would go past the block deck. there are 2 logical ways to fix this. have some custom shortened rods made (which will hinder rpms even more) or have the B16 sent to ERL performance and have the superdeckII performed. they will put in dart sleves bore it to 84mm and grind the appropriate deck to have off the shelf rods fit. The second decision would be the bes cause you get 2 birds with one stone.
just my 2c.
11-30-2005, 08:12 PM
#14
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
i think all the ideas mentioned are ways to make a b16 block into an LS block and are very expensive. why not just buy an LS?? i want a high revving non v-tec block. the rocker "gaurd" thing is a decent idea though.
12-01-2005, 03:13 AM
#17
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re: i'm on crack....P8R head on 84mm b16 block. knowlegde only...no ****** HT haters
B18A/B + 3G Prelude intake valves = poor man's P8R.
I agree, flowbench numbers have nothing to do with the actual performance of the head itself... that's why an 11:1 CR unported LS head with Crower 404's revved to 7500 makes as much or more power than an 11:1 CR ITR with factory mild ported head and factory equivalent cams revved to 8400, both with comparable bolt ons... and the LS makes a ---- ton more power below peak than the ITR.
Up to 180 whp in NA form, the LS gives you the same peak power and a lot more under the curve.
Apply that NA LS knowledge towards a boosted setup... hrm. Starts looking like a waste of money, unless you rev the engine out some more. They make rocker retainers for LS, similar to the SR20 stuffs, but and LS head is just not as suited to the rpms as a B16/GSR head, as others have mentioned.
Wait, isn't the highest power made off of a completely stock LS head on a built bottom end in the 700-800 whp range? So, we can infer for practical applications, trying to make a B-series head flow better for forced induction is a big fat waste of time and money. Save that ---- for the NA guys.
I agree, flowbench numbers have nothing to do with the actual performance of the head itself... that's why an 11:1 CR unported LS head with Crower 404's revved to 7500 makes as much or more power than an 11:1 CR ITR with factory mild ported head and factory equivalent cams revved to 8400, both with comparable bolt ons... and the LS makes a ---- ton more power below peak than the ITR.
Up to 180 whp in NA form, the LS gives you the same peak power and a lot more under the curve.
Apply that NA LS knowledge towards a boosted setup... hrm. Starts looking like a waste of money, unless you rev the engine out some more. They make rocker retainers for LS, similar to the SR20 stuffs, but and LS head is just not as suited to the rpms as a B16/GSR head, as others have mentioned.
Wait, isn't the highest power made off of a completely stock LS head on a built bottom end in the 700-800 whp range? So, we can infer for practical applications, trying to make a B-series head flow better for forced induction is a big fat waste of time and money. Save that ---- for the NA guys.
12-01-2005, 06:34 AM
#18
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
they make pistons with a raised pin so you can run an ls crank in a b16 block. why do this when you can just buy a b18b block for cheap? sole reason is so it looks like you have a b16.
and yes stock for stock the p8r head flows 10cfm less than a b16a BUT it flows alot more than a b18b (~20 cfm). a performance valvejob alone will make it flow on par with any stock vtec head.
and yes you can put oversized intake valves in a LS head and they make them up to 2mm over
honestly if you want a high revving non-vtec block look into web cams or phantom grip rockers in a b16a head
and yes stock for stock the p8r head flows 10cfm less than a b16a BUT it flows alot more than a b18b (~20 cfm). a performance valvejob alone will make it flow on par with any stock vtec head.
and yes you can put oversized intake valves in a LS head and they make them up to 2mm over
honestly if you want a high revving non-vtec block look into web cams or phantom grip rockers in a b16a head
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