Ls/vtec

[EatSleepJDM]

Planning on making at least 200 whp, i am building an ls/vtec 90 b18a block, 1st gen b16 head ctr pistons, skunk2 valves, retainers, and springs, megan header, skunk IM, block guard, girdle is it possible for me to make this kind of power with this set up in an 88 crx Hf. And wanted some suggestions on who to tune with.Thanks Modified by EatSleepJDM at 7:20 PM 1/19/2007 Modified by EatSleepJDM at 7:20 PM 1/19/2007 Modified by EatSleepJDM at 5:43 PM 1/20/2007

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[killerpenguin21]

ctr pistons are a horrible idea

[lluks_844]

i agree bad idea

[clarkekent13]

http://www.honda-tech.com/zerosearch

lsvtec vtec 200whp


^^^^^words to search^^^^

[EatSleepJDM]

why would it be a bad idea to use ctr pistons, if im not milling the head or decking the block

[EatSleepJDM]

and who is a quality company to tune with?

[Jay_Sensing]

CTR pistons have bad flame travel and too much compression for pump. Stick with a P30 or PR3.

[EatSleepJDM]

has a set-up similar to this been successful before

[EatSleepJDM]

anyone?

[groundzerocivic]

Originally Posted by Jay_Sensing

CTR pistons have bad flame travel and too much compression for pump. Stick with a P30 or PR3.

i am basically runnin the same setup in my eg coupe except i have a stock gen 1 b16 head that has been milled. i have no probs out of the ctr pistions and i run 93 octane pump gas. plus i am on hondata s200 also

[EatSleepJDM]

how much has your head been milled

[groundzerocivic]

Originally Posted by EatSleepJDM

how much has your head been milled

dunno, but i do know that the combustion chamber is now at 42 cc's

[EatSleepJDM]

well i guess ill keep reading up, cause some people say its to much compresssion, and not a practical set-up, and some people say the opposite, nice set-up will do good

[groundzerocivic]

Originally Posted by EatSleepJDM

well i guess ill keep reading up, cause some people say its to much compresssion, and not a practical set-up, and some people say the opposite, nice set-up will do good

dude, i am runnin 12.4:1. the only thing i havee a prob with is my mpg.
guess thats what i get fer a MILDLY built motor.

[EatSleepJDM]

and thats with about the same set up as i listed, cause a lot of people say that will yeild a 13+:1 CR

[groundzerocivic]

u will be fine as long u can get at least 93 octane fuel and good management

http://c-speedracing.com/ do to the how to section and plug in your info and this will give u a really close calculation on your compression

http://thecarspace.com/eglsvtec check me out on here.... i have listed everything i have done.



Modified by groundzerocivic at 2:36 PM 1/21/2007

[clarkekent13]

ctr pistons will give you too much compression. There are quite of few reputable engine builders on here that reccomend staying under 12:1 for reliabilities sake. Just because you cant hear detonation, doesnt mean its not happening inside your engine. Sure it might last 2-3 years, or it might last you 6 months. Again, this has been stated by people with more experience in honda's and engine building than me, groundzero, or you combined- learn from their knowledge/mistakes, keep it under 12:1. Besides the high CR that ctr(pct) pistons give, they are heavier than an itr (p72,p73) or b16 (p30, pr3) pistons. This also is obviously less desirable. Plenty of folks on here have made very good numbers on itr and b16 pistons, and they will work well for you. Again though, search- these builds have been covered over and over, if you dont search - you end up limiting your knowledge/answers to one or 2 opinions in alot of cases(even this thread?) If those one or 2 opinions are wrong, but all you have to go on- it could mean trouble for your engine build.

[EatSleepJDM]

im wanting to break into the 12's, with an Ls/vtec in my 88 crx hf, what set-up do you guys suggest to be able to acheive this

[doood]

Originally Posted by EatSleepJDM

im wanting to break into the 12's, with an Ls/vtec in my 88 crx hf, what set-up do you guys suggest to be able to acheive this

focus on suspension and driver skills first. you can have 500whp and not break 12's if you dont know what you're doing.

[groundzerocivic]

Originally Posted by clarkekent13

ctr pistons will give you too much compression. There are quite of few reputable engine builders on here that reccomend staying under 12:1 for reliabilities sake. Just because you cant hear detonation, doesnt mean its not happening inside your engine. Sure it might last 2-3 years, or it might last you 6 months. Again, this has been stated by people with more experience in honda's and engine building than me, groundzero, or you combined- learn from their knowledge/mistakes, keep it under 12:1. Besides the high CR that ctr(pct) pistons give, they are heavier than an itr (p72,p73) or b16 (p30, pr3) pistons. This also is obviously less desirable. Plenty of folks on here have made very good numbers on itr and b16 pistons, and they will work well for you. Again though, search- these builds have been covered over and over, if you dont search - you end up limiting your knowledge/answers to one or 2 opinions in alot of cases(even this thread?) If those one or 2 opinions are wrong, but all you have to go on- it could mean trouble for your engine build.

i completely understand where u r comin from......i did my research b4 i had put my block in the machine shop. as far as reputable engine builders, i contacted an east coast reputable Honda builder which was Inline Pro out of Springfield Va........they had told me that i would be fine runnin CTR pistons in my setup as long i got a good tune(which i did).......guess what i am tryin to say is that i DON'T race my car every weekend and the drag strip. i didn't want to build a race car, i wanted something that i could screw round on the street with and still have a reliable daily driver.

[doood]

Originally Posted by groundzerocivic

i completely understand where u r comin from......i did my research b4 i had put my block in the machine shop. as far as reputable engine builders, i contacted 1 of the east coasts reputable Honda builders which was Inline Pro out of Springfield Va........they had told me that i would be fine runnin CTR pistons in my setup as long i got a good tune(which i did).......guess what i am tryin to say is that i DON'T race my car every weekend and the drag strip. i didn't want to build a race car, i wanted something that i could screw round on the street with and still have a reliable daily driver.

what cams do you run?

[groundzerocivic]

Originally Posted by doood

what cams do you run?

stock b16......my tuner stated i have room to grow....i could upgrade cams along with springs and retainers and cam gears....but i think all i will do is the adj. cam gears and maybe spring & retainers


Modified by groundzerocivic at 9:27 PM 1/21/2007

[SiB16A]

b16 pistons, p30s

[doood]

Originally Posted by groundzerocivic

stock b16......my tuner stated i have room to grow....i could upgrade cams along with springs and retainers and cam gears....but i think all i will do is the adj. cam gears

reason i asked is because you can use cams with lots of duration to help bleed off some of the pressure, effectively giving you a lower dynamic compression.

[groundzerocivic]

Originally Posted by doood

reason i asked is because you can use cams with lots of duration to help bleed off some of the pressure, effectively giving you a lower dynamic compression.

no shit!!!! did not know that.... learn somethin new every day!!!!

i was also told by my tuner do not use any cams bigger than a stage 2 due to the CTR pistons