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what boost levels for 408

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Old 06-11-2008, 05:56 PM
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Default what boost levels for 408

Okay so i got my built 408 with a cr of 8.8-1, with a232 226 dur.@050.588 and a 574 lift on a 114 lsa @110 cam, now was wondering what boost levels what be good for this cr???Mostly street car, pump gas...oh yea i got a gt 76 garrett in a rear mount setup....any advise or opionions...thanks
Old 06-11-2008, 06:30 PM
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wow that is low i think its to low for rear mount
Old 06-11-2008, 06:30 PM
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you will find out when you go to tune it.I would guess on pump gas 10-15psi depending on your fuel system
Old 06-11-2008, 07:10 PM
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I'm gonna be runnin dual walbro pumps, 60lb injectors....is a 9-1 better cr???
Old 06-11-2008, 07:29 PM
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Check out this Camaro we built. Bob
http://www.exoticperformanceplus.com...Car.php?car=32
New video footage inside at bottom! We upgraded Scott's car with a 6.0L iron block, now displacing 408 cubic inches. We are still using the 4l60 transmission and Vigilante 3200 converter, and Scott still has the 3:73 gears. We installed a larger GTS76 mm turbo, a 44mm wastegate, and an E-boost 2 controller. We added a larger K&N air filter, and we made a 4.00" exhaust tailpipe for it. This new set-up is definitely going to make a lot more power. We're out of injector at 11.5 lbs of boost, so the next step will involve installing a driver and some 95lb fuel injectors.
Old 06-11-2008, 08:37 PM
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Originally Posted by Exotic Performance Plus
Check out this Camaro we built. Bob
http://www.exoticperformanceplus.com...Car.php?car=32
New video footage inside at bottom! We upgraded Scott's car with a 6.0L iron block, now displacing 408 cubic inches. We are still using the 4l60 transmission and Vigilante 3200 converter, and Scott still has the 3:73 gears. We installed a larger GTS76 mm turbo, a 44mm wastegate, and an E-boost 2 controller. We added a larger K&N air filter, and we made a 4.00" exhaust tailpipe for it. This new set-up is definitely going to make a lot more power. We're out of injector at 11.5 lbs of boost, so the next step will involve installing a driver and some 95lb fuel injectors.
Hey bob what's his cr n was he using 60lbs injectors?damm max out at 11lbs
Old 06-11-2008, 11:40 PM
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I like to turn the boost up until I pop a headgasket, then back it off 3-4lbs.
Old 06-12-2008, 05:00 AM
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Originally Posted by 02 hawk
Hey bob what's his cr n was he using 60lbs injectors?damm max out at 11lbs
I believe it was around 9.0/1. Bob
Old 06-12-2008, 07:06 AM
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Originally Posted by ls1_chevelle
I like to turn the boost up until I pop a headgasket, then back it off 3-4lbs.
Not a good idea.
Old 06-12-2008, 05:17 PM
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Originally Posted by Exotic Performance Plus
I believe it was around 9.0/1. Bob
hey bob what you think about those 79lbs injectors from ractronix's,those 60 max at around 11lbs on his setup would those 79's be any better???

Originally Posted by BLNLS1/RX7
Not a good idea.
yea i dont think ill be doing that.......those gaskets are pretty expensive.....
Old 06-12-2008, 06:09 PM
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Originally Posted by 02 hawk
hey bob what you think about those 79lbs injectors from ractronix's,those 60 max at around 11lbs on his setup would those 79's be any better???
A 79lb high impediance injector would be a great idea, I'm not sure what their cost is, but Delphi 96lb injectors and an AEM driver run $800.00 combined. They my not be too much more. Bob



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