Ok I am planning on do a high compresson motor on my 99 EX with 11.1 CR what do you guys think and what will i need? and what are the horsepower gains for doing this.? Will i see more power or torqe? I new to this concept. so any thing you guys say will help. well I have to get a new ECU? Run high oqtane gas? thanks.
High Compresson Motor
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umm...
ok i'm not going to be a complete dick and tell you to just use the search button. but give it a try.
do a search for things you have questions about and it'll help you with asking questions that will net you an answer instead of nothing.
ok first off just going high compression on your motor will do just about nothing for you.
a combination of high compression, head porting, intake and exhaust flow, camshaft specs, fuel curve, spark curve and general overall tuning will net you higher horsepower when building a naturally aspirated motor. check out the n/a tech forum here. do a search for specific questions you may have and then come back and ask some different questinos. people here are more than welcome to help.
pieces...
ok i'm not going to be a complete dick and tell you to just use the search button. but give it a try.
do a search for things you have questions about and it'll help you with asking questions that will net you an answer instead of nothing.
ok first off just going high compression on your motor will do just about nothing for you.
a combination of high compression, head porting, intake and exhaust flow, camshaft specs, fuel curve, spark curve and general overall tuning will net you higher horsepower when building a naturally aspirated motor. check out the n/a tech forum here. do a search for specific questions you may have and then come back and ask some different questinos. people here are more than welcome to help.
pieces...
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actually higher compression WILL give you power, it'll increase hp and torque at all rpm's. of course i/h/e helps too, but 11.1 will give you 10-15 hp, which is what intake, header, and exhaust give you all together. you're putting in d16a6 pistons right? with that kind of compression modifying the a/f ratio and shit like that would help, but not necessary. a vtec controller would be a plus (to modify fuel). remember though you have to run premium gas or you'll get detonation.
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nah i dont know that much, its just that i'm planning on putting in the a6 pistons in my y8 too sometime (soon hopefully) so i looked around for info. if you want some good all-motor d16 info go to http://pub34.ezboard.com/bhondadseries
I think you'd be happier with a turbo or something else. If you build an engine for high compression you get to run 100+ octance fuel, and no octane booster doesn't work therefore everytime you are out of gas you have to go search out a gas station that supplies race gas.
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hahaha man you gotta be kidding me!! 100+ octane for 11.1 cr?? you can safely run up to 12 cr on 92 octane. and yes octane booster does work, why would people buy it if it didn't?cmills83 said:
just out of curiousity, how much do the a6 pistons cost for the set of 4?
Civic1999, check out that NA forum like 5gencivic said, its a good forum. But hey, you may want to considder if you really want to go N/A, it has advantages and disadvantages. BTW, i give you credit for working with your Y8 =)
Civic1999, check out that NA forum like 5gencivic said, its a good forum. But hey, you may want to considder if you really want to go N/A, it has advantages and disadvantages. BTW, i give you credit for working with your Y8 =)
are you sure the a6 pistons are compatible with the y8 head? i'm not trying to tell you not to do this but it seems to me like you may run into some problems if you simply swap them out.
other than that why don't you do a camshaft or something that will probably net you more gains?
i honestly can't see you gaining more than about 8 horses at the wheels with a higher compression ratio. without the correct camshaft spec a higher compression ratio just doesn't make sense to me. it's a move one would usually make when they're fully committed to going n/a. it will take a lot of cash to get someone to install those pistons for you. 200 is just for the pistons, don't be suprised if a shop asks for 500 - 1000 dollars just to install them.
other than that why don't you do a camshaft or something that will probably net you more gains?
i honestly can't see you gaining more than about 8 horses at the wheels with a higher compression ratio. without the correct camshaft spec a higher compression ratio just doesn't make sense to me. it's a move one would usually make when they're fully committed to going n/a. it will take a lot of cash to get someone to install those pistons for you. 200 is just for the pistons, don't be suprised if a shop asks for 500 - 1000 dollars just to install them.
Actually my friend built his teg with high comp pistons, etc.. and he had to run 117 octane. And personally if i spent all that money on building a motor I wouldn't rely on octance booster, btw people buy lots of stuff that doesn't do what it claims to do, ie cai's that claim they add 15-20 hp or those cool "tornados" that you hook onto your intake for 50+hp...yeah right.just chillin said:
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While you are going through all of that to get the pistons installed, I would recommend looking into a crower stage 1 cam. It is $321 from www.crower.com and do a little tuning with your cam gear. You should get some pretty nice gains from it all. By the time its all said and done, you should be putting down more power than a stock b16.
Let us know how it goes. And someone asked... Yes, the d16a6 pistons will work. There have been several very extensive threads on using these pistons in a z6/y8 engine.
Let us know how it goes. And someone asked... Yes, the d16a6 pistons will work. There have been several very extensive threads on using these pistons in a z6/y8 engine.
how high of a compression ratio was your friend running?cmills83 said:
i've personally run 11.2:1 on 93 pump gasoline with nothing other than very mild tuning done on a v-afc. the key to getting everything to run correctly is TUNING. your friend was either running above a 12:1 or he was completely ignorant of his car's state of tune. also i believe 117 octane is leaded fuel. his aluminum block and head would have lasted about fifteen minutes with leaded gasoline, unless i'm mistaken the two don't react very well.
Hay guys thanks for all the info and no I well not have to use leaded gas we have 92 oqtane here in TX. And yes I going to get a cam for it too and a VAFC and a reprogramd ECU! Well let all of you guys know as soon as I do this to my car. O and tuning it on a dyno !!!!!!!!
:vivi: :ken:
:vivi: :ken:
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Yeah, be sure to post and let us know the results. I'm considering going a minor all motor route myself. If I can get the same power as a b16 at half the price, well, you can't beat that
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