Carb Size for 427-433cuin LSX Nitrous Motor
11-07-2014, 10:44 AM
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Carb Size for 427-433cuin LSX Nitrous Motor Just looking for some input on carb size for the following motor.
427-433cuin LSX 4" stroke 4.125-4.155 bore
11.5:1 Comp
cam 250-260 duration .630 lift
LS3 style heads 250cc to 270cc, flow 360ish at .700
LS3 super vic.
Direct port nitrous kit - 250 to 400 shot
3200lb car with 1.80 glide and brake, 3.73 gears
4150 carb or 4500?
something in the 1000cfm to 1150cfm range?
Any input appreciated.
427-433cuin LSX 4" stroke 4.125-4.155 bore
11.5:1 Comp
cam 250-260 duration .630 lift
LS3 style heads 250cc to 270cc, flow 360ish at .700
LS3 super vic.
Direct port nitrous kit - 250 to 400 shot
3200lb car with 1.80 glide and brake, 3.73 gears
4150 carb or 4500?
something in the 1000cfm to 1150cfm range?
Any input appreciated.
11-11-2014, 07:36 AM
#4
I believe I would agree with the other guys on this one. My 408 ended up with a 1000 cfm 4150, but with your bigger engine should need more.
I would keep in mind if you're planning on any class racing to see if they're any weight breaks for 4150. Mine is 75# so I stayed 4150
Quick Fuel Tech is glad to help if you call them.
If you can get Dale Cubic on the phone, he's one of the best, but pricey
I would keep in mind if you're planning on any class racing to see if they're any weight breaks for 4150. Mine is 75# so I stayed 4150
Quick Fuel Tech is glad to help if you call them.
If you can get Dale Cubic on the phone, he's one of the best, but pricey
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11-12-2014, 07:54 PM
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If you were restricted to 4150 flange I had the perfect QFT carb for that setup. I am about to put it up for sale I think.
Its a Q series 4150, custom built for my 383ci race motor with a n2o plate kit.
It is a 950 main body with ann boosters. It flows 1125cfm.
It was on a super victor pulling air through arf 205's at the command of a 248/258 solid roller at .650" lift. With 383 ci and this top end, it made around 600 fwhp.
Its a Q series 4150, custom built for my 383ci race motor with a n2o plate kit.
It is a 950 main body with ann boosters. It flows 1125cfm.
It was on a super victor pulling air through arf 205's at the command of a 248/258 solid roller at .650" lift. With 383 ci and this top end, it made around 600 fwhp.
11-13-2014, 05:19 AM
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