b16b pistons in b16a

[rage_against]

hi, will b16b pistons fit into a b16a? will it increase the compression ratio and would it be worth doing?

[GSi_PSi]

If you have the suporting camshafts,valvetrain,Intake manifold of B16B's then it would be worth doing.

[rage_against]

but on its own not worth it?

[GSi_PSi]

what are you after? more power and torque? have you thought of changing ur bottom end? much better bang for buck

[ALLMTR996]

The BYP Civic ran a B16a with CTR pistons for along time and then the engine went into a road car,TUNING the setup is the key to getting the most out of them you will just need a 65mm TB,Toda headers free flowing exhaust,cyl head needs a good valve job,You would be best off running Toda Spec-A Cams with there valve springs,or BuddyClub Spec3+ cams and there valve springs.

[rage_against]

thanks guys, gsipsi, your going to say put a b20 bottom on it arnt you lol? ive thought about it but i dont think im ready to do that just yet, im just throwin some ideas around before i decide on what to do, if anything. besides i figured a b20 would end up costing me a fair amount of coin.

[GSi_PSi]

yeah but your rebuilding a motor either way its going to cost you. For the gains you will get from hi-comp pistons, doing all that to a B16a n/a it just wont be worth it. Its smarter to just upgrade your bottom end to either B18/B20 and working that. Non-turbo-wise there is no replacement for displacement.
Do you have the B16B parts with you now?. If you can install it yourself, without it costing you anything on labour etc then yeah why not. But just remember you will need supporting cams to get the most of ur new hi-compression

[shmivic]

my old eg ran b16a2 wit ctr pistons, mugen head gasket and toda b's.

went well for stock bottom end 14.42 @ 110mph (itr g/box, full trim)

[tinkerbell]

110mph?

surely not...

[shmivic]

was done nearly 5 years ago.

proof was on time slip, witnessed by many.

all about ratio

4th gear, 8400rpm roughly, 177kmh

[tinkerbell]

then you must be a pretty average driver to take so long to cover 400 meters,

110mph is the speed good drivers hit through the traps when the run high 12's...

when i was running 14.4's with my 83 prelude, i was only trapping around 95mph...

[tinkerbell]

4th gear, 8400rpm roughly, 177kmh

4th @ 8400rpm with ITR box and 205/50R15's = around 116mph...

[shmivic]

215/50r15s

very bad 60fts around 2.4

[tinkerbell]

215's?

so it's 118mph now is it?

ok, whatevers...

I just hope the OP doesn’t make any decisions regarding using CTR pistons based on your miraculous experience with them...

EDIT: i found another car that traps 110mph: http://www.ozhonda.com/forum/showthread.php?t=90669&highlight=110mph

you might wanna compare times ;)

[shmivic]

er ok, what ever you say tinkerbitch.

his 60fts are almost a second lower incase u cant read.

we all know you are the man. keep up the good work

[JDM.Power]

lol 14.4 @ 110mph! LOL

a civic ran a 13.8 @ 105mph with a 2.2 60ft on steelies 175/55/15s bald tires. work it out...

none the less, as gsipsi says, i would agree with him.

[ALLMTR996]

my old eg ran b16a2 wit ctr pistons, mugen head gasket and toda b's.

went well for stock bottom end 14.42 @ 110mph (itr g/box, full trim)

If its got CTR pistons its not a STOCK bottomend is it,STOCK bottomend would have PR3 pistons or a JDM B16a2 would have P30 pistons.

[rage_against]

haha thanks guys.

[MrKaji]

yeah but your rebuilding a motor either way its going to cost you. For the gains you will get from hi-comp pistons, doing all that to a B16a n/a it just wont be worth it. Its smarter to just upgrade your bottom end to either B18/B20 and working that. Non-turbo-wise there is no replacement for displacement.
Do you have the B16B parts with you now?. If you can install it yourself, without it costing you anything on labour etc then yeah why not. But just remember you will need supporting cams to get the most of ur new hi-compression

before you say "high compression"

CTR pistons in stock B16a and OEM 3 layer head gasket will only get about 10.8:1 Compression...(google honda B series compression calculator)

if you want something higher better off getting aftermarket rollerwave pistons, or deck the block and shave the head, or buy a thinner head gasket from Spoon or Mugen. Then again slapping a b20 botton end would be easier...

personally i say just get new pistons if your rings are gone...if your car aint burning excessive oil better off saving up for a proper rebuild

[GSi_PSi]

sorry i was thinking of the 12:8 comp ratio you would get if you stick them in a B18..

[ALLMTR996]

before you say "high compression"

CTR pistons in stock B16a and OEM 3 layer head gasket will only get about 10.8:1 Compression...(google honda B series compression calculator)

These figures from one of your SEARCH GOOGLE comment compression calculators

Using a 0.030" thick head gasket in a B16A engine you will get these results

81mm Bore
PR3 Piston 6.01cc dome + 30mm comp height = 10.18 to 1 piston will be 0.022" down the bore on a undecked block

P30 Piston 6.93cc dome + 30mm comp height = 10.38 to 1 piston will be 0.022" down the bore on a undecked block

PCT Piston 8.63cc dome + 30.73mm comp height = 11.76 to 1 comp piston will be 0.007" out of the bore on a undecked block

Using a 0.030" thick head gasket in a B16B engine you will get these results

PCT Piston 6.93cc dome + 30.73mm comp height = 10.63 to 1 comp with piston 0.026" down the bore


So there you go if you do it make sure the engine builder knows what he/she is doing,there is some much WRONG info on these forums its not funny.

[tinkerbell]

google honda B series compression calculator)


try this one:

http://www.zealautowerks.com/bseries.html

'its more accurate then the c-speed one' (i read that on the internets)

[MrKaji]

These figures from one of your SEARCH GOOGLE comment compression calculators

Using a 0.030" thick head gasket in a B16A engine you will get these results

81mm Bore
PR3 Piston 6.01cc dome + 30mm comp height = 10.18 to 1 piston will be 0.022" down the bore on a undecked block

P30 Piston 6.93cc dome + 30mm comp height = 10.38 to 1 piston will be 0.022" down the bore on a undecked block

PCT Piston 8.63cc dome + 30.73mm comp height = 11.76 to 1 comp piston will be 0.007" out of the bore on a undecked block

Using a 0.030" thick head gasket in a B16B engine you will get these results

PCT Piston 6.93cc dome + 30.73mm comp height = 10.63 to 1 comp with piston 0.026" down the bore


So there you go if you do it make sure the engine builder knows what he/she is doing,there is some much WRONG info on these forums its not funny.

like this guys is going to understand what u just wrote
but again thanks for re stating my concept and stating the obvious great help

[ALLMTR996]

like this guys is going to understand what u just wrote
but again thanks for re stating my concept and stating the obvious great help
Well we can only hope it helps,correct info is good,misinformation is not hey but we all have to learn.

[rage_against]

like this guys is going to understand what u just wrote



unfortunately your right lol

[MrKaji]

Well we can only hope it helps,correct info is good,misinformation is not hey but we all have to learn.

LOL right... u basically just regurgitated what i wrote with some numbers and measurements thanks mate...

[tinkerbell]

LOL right... u basically just regurgitated what i wrote with some numbers and measurements thanks mate...

um, you were WRONG by a fair bit, so either you cant admit that to yourself, or you don't understand the consequences of the error you made ...

[GSi_PSi]

lol i dont think he does. so the comp ratio is around less than 12:1 with the B16B pistons ina B16A block

[ALLMTR996]

lol i dont think he does. so the comp ratio is around less than 12:1 with the B16B pistons ina B16A block

With milling and tweaking thats what the BYP B16a ran 2 years ago in there EG.

[tinkerbell]

lol i dont think he does. so the comp ratio is around less than 12:1 with the B16B pistons ina B16A block

he said "10.8"

the actual answer is closer to "11.8"

that is like the difference between the CR of a VtiR and a Type R...

or do you reckon that is not that big a difference?

[MrKaji]

um, you were WRONG by a fair bit, so either you cant admit that to yourself, or you don't understand the consequences of the error you made ...

LOL be aggressive be be aggressive

[BlitZ]

From my research back in the day... the dome top design was not crash hot..

is this still the general consensus in 2010? should just get some RS machine stuff.