Well I know the general consensus is that 7psi is the safe limit on stock internals. Its just that I had a boost controller installed but I'm not using it. I'm boosting 6psi with the boost controller off, I want to set it to 8 psi low boost and 9psi high boost. Will using a octane booster help at all? Race gas?
You might get away with 9psi on race gas and good tuning. I'd invest in a J&S safeguard or put a datalogger on your knock sensor, though. Playing with 9psi on 91 octane isn't a good idea.. hell.. I'd be trying to get the PSI even lower than 7psu on stock. But, I'm a chicken. .
I guess the only good thing of not living in Cali is that we still got 93 octane on our pump gas. I believe there is a datalogging knock sensor in the aem ems program I can check out. I really haven't donee much datalogging due no no access to a laptop. Well I got a toshiba laptop but for some real strange reason theres no com port???
Man I just went and read the "Who blew a motor..." sticky. I think I'mma stick with 7psi although I am going to set my boost controller to 9psi just so I can do a few runs against my friends turbo civic si.
Originally posted by Blaast If you want to keep the stock internals, I suggest to at least add a thicker head gasket to reduce CR. 10:1 is way too much....
Even then, I would not recommend boosting more than 7 psi on stock pistons. (7 psi is a lot of boost anyway...)
who makes thicker gaskets for gen5?
(what do u recommend)
Considering that it's just a stock gasket with the center sheet made of 2mm thick copper, it could be custom made.
Other brands are offering it in steel. Can't remember their names.
how low can you go with a boost controller? Or is it that you can boost higher than your wastegate spring? What about running a head gasket and a J&S in tandem? Good idea or bad? If you return to stock, does the head gasket make your car sluggish or anything like that?
Boost is controlled by the spring in the wastegate. You can't go lower, only higher. The head gasket and J&S really don't affect each other. Head gasket can be used to lower or raise the compression a bit. And no, I doubt you will notice the difference if you go back to stock.
cometic has a wide range of gaskets for the prelude. be careful that you tell your engine builder / machine shop / whatever what gasket you plan to use, and give all the info to cometic as well.
there is a possibility that the cometic turbo gasket will leak when used with a step-decked block (GE style). they also make non-turbo gaskets without the fire ring.
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Originally posted by jkoc
who makes thicker gaskets for gen5?
(what do u recommend)
__________________
"AIDS is not just God's punishment for homosexuals; it is God's punishment for the society that tolerates homosexuals." R.I.P. Jerry Falwell.
that would not be sticking with 7psi. be prepared to add your name to the wrong side of the sticky list.
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Originally posted by NtPReLuDe Man I just went and read the "Who blew a motor..." sticky. I think I'mma stick with 7psi although I am going to set my boost controller to 9psi just so I can do a few runs against my friends turbo civic si.
__________________
"AIDS is not just God's punishment for homosexuals; it is God's punishment for the society that tolerates homosexuals." R.I.P. Jerry Falwell.
upping the boost does not blow your motor, its bad tuning and fuel management....You guys ever heard of inline pro ? Well one night a guy and his buddies who work at inline pro rolled up here to our street racing scene...This guy had a GSR motor in his silver 98 civic coupe with a custom turbo kit...all he had done internally to the motor was valvesprings, retainers, and a head gasket...He was running 22 pounds of boost on stock internals and 111 octane gas. I did not believe him until he ran my friends 12.20 Ram Air Trans Am Stock w/ LS6 Motor (Corvette Z06 Motor)...They raced from a stop, the civic was ALL OVER the road until he hooked, and the trans am was up on him by about 3 cars...The civic pulled the guy by about 4-5 cars and continued to spank him..... If you go 7-9 PSI, worry about tuning and getting the right enough amount of fuel to the motor, that should be your main concern....
This story, is not bull****...Contact inline pro and ask for the GSR Civic chinese dude and the 4 Door GSR Turbo Integra Chinese dude who rolled up to hagerstown a few weeks ago...im dead serious
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Casey----2003 Rally Red Mitsubishi Lancer Evolution *WRECKED*
2003 Weightless White Mitsubishi Lancer Evolution
c-redrum, your optimism is heartwarming, but unfortunately not really supported by the evidence. i also fail to see what the outcome of one illegal street race between a hybrid civic and an f body has to do with the reliability of a prelude motor on boost.
the motor was not designed for 300 horsepower at the crank. some parts of it may be plenty strong for that and beyond, but some are clearly not. there is a fair amount of anecdotal evidence that h22a pistons crumble cannot stand up to a lot of boost for a long period of time with or without detonation.
christ, even the guys at hondata say it, and they sell engine computers for boosted preludes.
Quote:
Originally posted by C-Redrum upping the boost does not blow your motor, its bad tuning and fuel management....You guys ever heard of inline pro ? Well one night a guy and his buddies who work at inline pro rolled up here to our street racing scene...This guy had a GSR motor in his silver 98 civic coupe with a custom turbo kit...all he had done internally to the motor was valvesprings, retainers, and a head gasket...He was running 22 pounds of boost on stock internals and 111 octane gas. I did not believe him until he ran my friends 12.20 Ram Air Trans Am Stock w/ LS6 Motor (Corvette Z06 Motor)...They raced from a stop, the civic was ALL OVER the road until he hooked, and the trans am was up on him by about 3 cars...The civic pulled the guy by about 4-5 cars and continued to spank him..... If you go 7-9 PSI, worry about tuning and getting the right enough amount of fuel to the motor, that should be your main concern....
This story, is not bull****...Contact inline pro and ask for the GSR Civic chinese dude and the 4 Door GSR Turbo Integra Chinese dude who rolled up to hagerstown a few weeks ago...im dead serious
__________________
"AIDS is not just God's punishment for homosexuals; it is God's punishment for the society that tolerates homosexuals." R.I.P. Jerry Falwell.
9 years later but hell i'll throw my 2 cents in. If you just wanna boost 7, get block bolts and some arp studs to be safe, that with a good tune and you're golden
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