B18A1/Vtec head---Block Build Questions
05-09-2004, 07:39 PM
#1
0.0 BAR
Thread Starter
Join Date: Dec 2003
Posts: 48
B18A1/Vtec head---Block Build Questions
I have a little money available and I have an idea of building an ls/vtec motor.
I have a stock b18a1 block and want to run it Overbored to 2.0/84mm with the stock rods/crank @ about 12.5:1 or 13:1 compression 84 mm pistons with about 8500-9000 redline, individual throttle bodies fpr,270cc injectors etc.....
B16a1/gsr head with the valvetrain/block ready to accept a redline of about 8800-9000 (in other words high compression/high redline/vtec/Daily driven/200 whp
) I dont want to buy any Aftermarket rods/crank unless accomplishing this goal forces me to. Or maybe I wont think such high rpms anymore?? maybe 8k rpms is a realistic goal.
Does anyone have any piston/rod combo/info that will be fit for this setup? forged/JE/ctr pistons....) (stock rods reinforced w/arp bolts or Eagle Rods??)
2: Which program should I get the stock p28 ecu in my 95 civic ex to run with the vafc?? gsr/ctr/itr??
3: Does anyone know of a company that makes main/connecting rod/trust bearings that are not as likely to spin or get f**ed up when I have a valvetrain ready to handle redline set at 8900-9000 I saw these on egey http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
Thanx in advance
I have a stock b18a1 block and want to run it Overbored to 2.0/84mm with the stock rods/crank @ about 12.5:1 or 13:1 compression 84 mm pistons with about 8500-9000 redline, individual throttle bodies fpr,270cc injectors etc.....
B16a1/gsr head with the valvetrain/block ready to accept a redline of about 8800-9000 (in other words high compression/high redline/vtec/Daily driven/200 whp
) I dont want to buy any Aftermarket rods/crank unless accomplishing this goal forces me to. Or maybe I wont think such high rpms anymore?? maybe 8k rpms is a realistic goal.Does anyone have any piston/rod combo/info that will be fit for this setup? forged/JE/ctr pistons....) (stock rods reinforced w/arp bolts or Eagle Rods??)
2: Which program should I get the stock p28 ecu in my 95 civic ex to run with the vafc?? gsr/ctr/itr??
3: Does anyone know of a company that makes main/connecting rod/trust bearings that are not as likely to spin or get f**ed up when I have a valvetrain ready to handle redline set at 8900-9000
I saw these on egey http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVWThanx in advance
05-10-2004, 09:35 AM
#2
3.0 BAR
Join Date: Feb 2003
Posts: 9,089
Re:B18A1/Vtec head---Block Build Questions
all that work will cost a bit more then "a little" money!
Id skip the ITB, not very easy to accomplish. Just get a b18a, stuff some CTR or ITR pistons in it w/ some Crower Econo rods and get some nice r-spec cams, you'll be happy w/ that.
Id skip the ITB, not very easy to accomplish. Just get a b18a, stuff some CTR or ITR pistons in it w/ some Crower Econo rods and get some nice r-spec cams, you'll be happy w/ that.
05-11-2004, 02:57 AM
#3
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Join Date: May 2003
Posts: 3,365
Re:B18A1/Vtec head---Block Build Questions
yeah really, how much is your budget here?
Just spend the money on a low milage LS block, slap the vtec head on it (leaving stock internals) and spend your money on the turbo kit.
If you want a N/A pure redline running motor, go with a VTEC B block or an H22
Just spend the money on a low milage LS block, slap the vtec head on it (leaving stock internals) and spend your money on the turbo kit.
If you want a N/A pure redline running motor, go with a VTEC B block or an H22
05-11-2004, 08:33 PM
#4
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Thread Starter
Join Date: Dec 2003
Posts: 48
Re:B18A1/Vtec head---Block Build Questions
Originally Posted by quadnie
yeah really, how much is your budget here?
Just spend the money on a low milage LS block, slap the vtec head on it (leaving stock internals) and spend your money on the turbo kit.
If you want a N/A pure redline running motor, go with a VTEC B block or an H22
Just spend the money on a low milage LS block, slap the vtec head on it (leaving stock internals) and spend your money on the turbo kit.
If you want a N/A pure redline running motor, go with a VTEC B block or an H22
I heard you cannot put the vtec head on top of the stock ls block because the valves will hit the pr4 ls pistons, reliefs are almost non-existant on these pistons.
And with itr or ctr there are huge reliefs for the valves to clear.
Question: Does anyone know what Ratio I will yeild with the ITR or CTR pistons, Stock LS rods, B16A head
05-11-2004, 09:25 PM
#5
Administrator
Join Date: Dec 2002
Posts: 13,991
Re:B18A1/Vtec head---Block Build Questions
Jay, I've ran a couple ls/vtec's. My last setup with a B18a shortblock/B16a head w/ ITR cams. Piston=valve clearence is fine. I also swapped out the PR4 pistons w/ a set of PR3 pistons and they are fine too. I dont think you can overbore a stock sleeve to 84mm, thats really pushing it.
If you want to go all out you will need to sleeve the block, then you can run some big pistons.
If you want to go all out you will need to sleeve the block, then you can run some big pistons.
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