High comp back to low for boost
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High comp back to low for boost
Hey guess I've been trying to build an all motor B18c1 so of course it's high compression (12:1) my build so far is the head its a GSR head with skunk 2 springs and retainers for hi rpm Type R cams type R water pump RC 310 injectors block manifold gsr stock throttle body.. for the bottom and is a GSR block boarded to 82mm ( millimeter) cp piston polished crank all new seals GS. I want to boost my car. With that being said what steps should I do to convert back an keep the most power I have already in my car. I make 211whp now and I want to go for 300+hp with boost any help would be great.
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Re: High comp back to low for boost
Lower that compression a bit.
It could be done but with maybe race gas only. Im guessing this is a street driven car.
I never messed with thicker headgaskets to lower comp. so I wouldn't know anything about that.
It could be done but with maybe race gas only. Im guessing this is a street driven car.
I never messed with thicker headgaskets to lower comp. so I wouldn't know anything about that.
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Re: High comp back to low for boost
This man has a high compression FI build thread, and knows what the **** he's talking about.
One minor adjustment, though: You do need to touch your injectors and fuel pump. Take them out, throw them away, and get some proper hardware. 310cc/min injectors will absolutely **** themselves at 200 BHP TC. You should be hunting down some 750cc/min injectors or larger for 350.
One minor adjustment, though: You do need to touch your injectors and fuel pump. Take them out, throw them away, and get some proper hardware. 310cc/min injectors will absolutely **** themselves at 200 BHP TC. You should be hunting down some 750cc/min injectors or larger for 350.
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Re: High comp back to low for boost
Can we get a little more In depth as to why?
I want to get into high comp setups. I know you bent your wrist pins but you were making lots of power.
For the op goal what would be the main points of focus besides fuel (octane, etc)
I know the tune needs to be done very cautiously.
Does engine assembly take a bigger role? Ring gaps? etc.
I want to get into high comp setups. I know you bent your wrist pins but you were making lots of power.
For the op goal what would be the main points of focus besides fuel (octane, etc)
I know the tune needs to be done very cautiously.
Does engine assembly take a bigger role? Ring gaps? etc.
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Running it on the road could work would be fine like this on pump fuel? I would have to run low psi and race fuel only? Or can I get a decent 8psi on 93 with upgraded injectors? I was always told I needed lower compression or my motor is going to **** on me
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Re: High comp back to low for boost
I know this is a little off topic, but are they good? I haven't heard much about them lately. Tampa based.
Also, OP, you can definitely boost 12:1 CR. I think there was a 13.5:1 build by Muckman or Tony just recently. It's possible. Just make sure the tuner knows your build. Don't assume anything and you'll be fine.
Also, OP, you can definitely boost 12:1 CR. I think there was a 13.5:1 build by Muckman or Tony just recently. It's possible. Just make sure the tuner knows your build. Don't assume anything and you'll be fine.
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I know this is a little off topic, but are they good? I haven't heard much about them lately. Tampa based. Also, OP, you can definitely boost 12:1 CR. I think there was a 13.5:1 build by Muckman or Tony just recently. It's possible. Just make sure the tuner knows your build. Don't assume anything and you'll be fine.
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Re: High comp back to low for boost
A good tune makes the difference.
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Re: High comp back to low for boost
And to answer your question about engine assembly - No I did nothing different really. The clearances and gaps were typical of a 600hp E85 engine, regardless of compression. I did ceramic coat the pistons but I don't feel that was necessary. I obviously missed the wrist pin upgrade but that was a result of too much torque for the light pin, not compression again.
Consider this, on just 5.5psi @ 13.5 comp I made 350whp observed from a GT30R. That's extremely efficient.
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Re: High comp back to low for boost
Compression ratio is fine if you have a good tuner. Look into getting a water meth injection kit. This will help reduce the likelihood of detonation in your high compression boosted set-up, and allow you to run more timing. Good luck.
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So I found a couple tuners I'm gonna get to talking to about tuning this project. Now when It comes to picking a turbo kit what variables should I be looking at when making my choice? I've never had a turbo car nor have I've had much experience. Size/trim/brand. Always done all motor builds an they come out pretty good.
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Re: High comp back to low for boost
1000cc IDs are common here. I have 750cc RCs with a similar HP goal. I picked em up because they were cheap.
As for a turbo kit. Greg at Go-autoworks is a good person to call. They will help you size the turbo and such. Garret makes a good turbo. There is another thread around here that is sort of similar. I have a T3/T4 Garret .57 trim 63 AR and it works good for the HP you are looking to make. It's simple and cheap. You may want a water cooled turbo though. There are an infinite number of turbo options for this power level. Someone else will chime in with more experience.
As for a turbo kit. Greg at Go-autoworks is a good person to call. They will help you size the turbo and such. Garret makes a good turbo. There is another thread around here that is sort of similar. I have a T3/T4 Garret .57 trim 63 AR and it works good for the HP you are looking to make. It's simple and cheap. You may want a water cooled turbo though. There are an infinite number of turbo options for this power level. Someone else will chime in with more experience.
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1000cc IDs are common here. I have 750cc RCs with a similar HP goal. I picked em up because they were cheap. As for a turbo kit. Greg at Go-autoworks is a good person to call. They will help you size the turbo and such. Garret makes a good turbo. There is another thread around here that is sort of similar. I have a T3/T4 Garret .57 trim 63 AR and it works good for the HP you are looking to make. It's simple and cheap. You may want a water cooled turbo though. There are an infinite number of turbo options for this power level. Someone else will chime in with more experience.
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