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#1 |
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Hardcore Enthusiast
2002 Chevrolet Impala
???
Join Date: Jul 2007
Location: Fort Collins, Colorado
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Compression ratio w/supercharger
I am looking at building my engine this winter/spring, and was looking at also getting a stroker billet kit (along with a bunch of other goodies!)on VT's website. The lowest compression ratio I can find on there is 9.5:1. Is that low enough for a supercharger, cause I've always heard 8.5-9.0 is ideal for a supercharger.
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#2 |
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I Post Entirely Way Too Much
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what kind of supercharger are you going to run. 9.5 with a centrifugal blower will be perfect, you dont want low compression with them, as for turbo and twin screw though, youll want 8.5-9.0 with them
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RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#3 |
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
Location: Fort Collins, Colorado
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I was planning on a KB. So is 9.5:1 too high with a KB then???
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#4 |
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I Post Entirely Way Too Much
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yeah youd be better off going with 8.5, a stage 2 head plus a 18-20 cc dish in the pistons should do plenty to get that compression down low enough.
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RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#5 |
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Proud American
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not optumal. You could put SVO heads on there that would have a NPI size combustion chamber and get down less than 9.0:1 but that for the heads and intake is like 3 grand by them selfs! You could also just keep the stock stroke with forged rods, crank, and dished pistons that would make it optimal!
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RIP Travis Billings ![]() Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars |
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#6 |
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I Post Entirely Way Too Much
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i think you should do the higer compression, with the centri blower, till make more top en power (where you want it) and it will make for a faster car. kb are over rated and are a band aid for low compression. stick with the centri if ya want a faster car.
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RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#7 |
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
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I was planning on getting VT stage 2 heads, crower stage 2 or 3 (haven't decided yet) blower cam, crower springs and retainers (titanium), I was also thinking about crower valves (any recommendations would be nice).
Also what the difference between 44.5mm and 45.5mm (+1mm), and 36mm and 37mm (+1mm)??? Any recommendations on stroker rotating assemblies??? I would prefer billet because it is stronger. Eventually I plan on making a ton a power (700+ rwhp). |
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#8 |
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I Post Entirely Way Too Much
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if thats the power your wanting, regular forged parts will be fine. bllet stuff is needed if your wanting over 1000
__________________
RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#9 | |
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I Post Entirely Way Too Much
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__________________
RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#10 | ||
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
Location: Fort Collins, Colorado
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http://www.vtengines.com/store/index...roducts_id=110 http://www.vtengines.com/store/index...roducts_id=111 http://www.vtengines.com/store/index...roducts_id=108 http://www.vtengines.com/store/index...roducts_id=109 |
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#11 |
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Proud American
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Those are for the size of the valves. And it might help you out with a blower, but they are expensive to gain only 20 HP tops. And well dont buy the crower stuff from VT I orders the titanuium valvesprings and retianers Aug 17, 2007 and have yet to recieve anything. They keep blameing it on crower. But havent offered me a refund or a discount or anything.
And dude im telling you go the centri way!
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RIP Travis Billings ![]() Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars |
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#12 |
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I Post Entirely Way Too Much
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centri si the way, just go with whatever valves come in the head, theyve been researhed and proven to work fine with the combo. i wont ever order form vt again, i had problems when i ordered my heads from them
__________________
RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#13 |
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
Location: Fort Collins, Colorado
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If I get something besides a KB it will be a TT setup. What is an ideal TT compression ratio???
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#14 |
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I Post Entirely Way Too Much
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8.5-9.0
__________________
RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#15 | |
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
Location: Fort Collins, Colorado
Posts: 2,241
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#16 |
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I Post Entirely Way Too Much
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anything with a dish around 15 or bigger, with a bigger head will put you real close to what your wanting. im running a 21cc dish piston with vt stage 2 heads and i am right around 8.5:1
__________________
RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#17 |
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
Location: Fort Collins, Colorado
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Thanks! Now this may be a dumb question but, are blower cams also good for turbos, or not? If not, who makes a good turbo cam???
Another dumb question but, how does having a bigger head lower compression? |
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#18 |
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Proud American
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Bigger Combustion chamber in the head lowers compression. There is more space to combust in.
__________________
RIP Travis Billings ![]() Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars |
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#19 |
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I Post Entirely Way Too Much
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a blower cam isnc ompletely different form a turbo cam, i would contact a place like vt or some place that will custom build a turbo cam for you
__________________
RIP ![]() ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS |
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#20 |
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Hardcore Enthusiast
2002 Chevrolet Impala
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Join Date: Jul 2007
Location: Fort Collins, Colorado
Posts: 2,241
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Right on, thanks guys! I love this forum!
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