1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

RB Streetport

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Old 07-12-04, 04:40 PM
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Suicidal Death Missile

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RB Streetport

How big is the RB street port they are offering? I've was told I have something very similar to that, but with my carb idling high, I really can't tell the rough idle. Only when cold. Sounds nasty tho
Old 07-12-04, 05:55 PM
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Hunting Skylines

 
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Can't remember the exact port timing specs but RB ports are pretty conservative.
Old 07-12-04, 06:34 PM
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RX for fun

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Originally posted by REVHED
Can't remember the exact port timing specs but RB ports are pretty conservative.

Old 07-12-04, 08:26 PM
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Damn, i need a big SP. I want it LOUD
Old 07-13-04, 10:13 AM
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Very conservative actually. I don't remember the port timing exactly but the intake looked like it was around:

IO 25*ATDC
IC 60*ATDC

Some of the more wild SP's that I've seen go up to, +/-:

IO 20*ATDC
IC 72*ATDC

vs the stock 12A

IO 32*ATDC
IC 40*ATDC

13B 6P

IO 32*ATDC
IC 40*ATDC Primaries, 30*ATDC Secondaries, 70*ATDC 6Ps
Old 07-13-04, 10:33 AM
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Anyone know porting specs from atkins rotary? a 2nd stage on a 6 port 13b?
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