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Which carb for my 355?

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Old 10-18-2008, 10:05 PM
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Car: 1985 IROC
Engine: lb9
Transmission: 700R4 B&M shiftkit
Axle/Gears: 3.42s
Which carb for my 355?

Which carb should i get. Here are engine specs:

vortec 355
062 vortec heads
edelbrock rpm air gap intake manifold for vortec heads
comp cams grind cc306
510/540 lift. duration@ '.050 230/244
long tubes
Old 10-19-2008, 12:35 AM
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Car: '86 Trans Am and '03 S-10
Engine: 355ci and 4.3l
Transmission: 700R4 and NV3500
Axle/Gears: 7.625/3.42 Auburn and 8.5/3.08 Gov-
Re: Which carb for my 355?

LOL...same question 4 me too.

Sportsman2 heads
.488/.510lift @ 1.5 rocker + 1.6 rockers
234/244 dur
shortys 1 3/4
RPM intake

I got a 750 right now and its nice on the WOT, but really rich on the normal drive and idle.
Old 10-19-2008, 01:11 PM
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Car: 89 irocz
Engine: 305
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Re: Which carb for my 355?

Originally Posted by danielmonster
Which carb should i get. Here are engine specs:

vortec 355
062 vortec heads
edelbrock rpm air gap intake manifold for vortec heads
comp cams grind cc306
510/540 lift. duration@ '.050 230/244
long tubes
are the heads stock?
Old 10-19-2008, 05:15 PM
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Car: 1985 IROC
Engine: lb9
Transmission: 700R4 B&M shiftkit
Axle/Gears: 3.42s
Re: Which carb for my 355?

Originally Posted by slow89
are the heads stock?
no, they have been midly ported, bowl blended, and cleaned up. stock valve sizes.
Old 10-20-2008, 01:39 AM
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Axle/Gears: 12B-3.73/9"-3.89
If the valve guides haven't been cut down, you won't have enough valve travel to run that cam.
Old 10-20-2008, 01:47 AM
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Axle/Gears: 3.42s
Re: Which carb for my 355?

Originally Posted by five7kid
If the valve guides haven't been cut down, you won't have enough valve travel to run that cam.
I'm running comp cam's beehive springs and retainers which grants a little more than .550 lift.
Old 10-20-2008, 04:51 AM
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Car: 1987 Trans Am
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Re: Which carb for my 355?

Originally Posted by danielmonster
I'm running comp cam's beehive springs and retainers which grants a little more than .550 lift.
If the guide bosses were not cut down then you can have all the spring you want but when the valve opens you'll bottom out the retainer on the top of the valve guide.....which is bad bad bad!
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