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#1
08-05-2021, 12:07 AM
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2x4 carb jetting
Some time ago there was discussion about different carbs and manifolds on a street motor. Someone chimed in with their experience setting up Edelbrock 600 cfm carbs with #50 primary jets and i don't recall the rods.. I did check on the Edelbrock site but was unable to find these sizes. Does anyone recall this information or can anyone direct me to this thread? Thanks in advance.
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#2
08-05-2021, 03:51 AM
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Running #50 primary jets (if you can find them?) in an E-clone would require no rods at all.
JMHO |
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#3
08-05-2021, 10:34 AM
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What cubic inches does your engine have. As Kenth said .050 primary jetting is way too little if you have metering rods in the thing, at least for a 389 or larger engine. FYI the 421 sd engine back then came with .089 primary jets, .070 secondary jets, and .052x.060 or very close metering rods.
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#4
08-05-2021, 04:56 PM
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For my 470/409 I used 600 Eddy carbs jetted on step leaner than factory. They made more HP than 750 Eddys on the motor. I'll see if I have specific rods and jets written down.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#5
08-05-2021, 05:07 PM
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What I remember was 70 jets and 40 rods was a good starting point for a quad or duals with progressive linkage.
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#6
08-05-2021, 05:19 PM
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Quote:
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#7
08-05-2021, 05:34 PM
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"ended up 70-47 rod and a 98 primary 92 secondary jet. "
The rods usually are listed for top size and tip size.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs Last edited by Skip Fix; 08-05-2021 at 05:45 PM. |
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#8
08-06-2021, 01:20 PM
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As far as I know .050 jets aren't even available. I'm running .095 primary jets, .070 secondary and 73-42 rods in my edelbrock 650s. This is on the 428 in my signature.
__________________
1967 GTO, 432 (428+.030), 4-bolt mains, factory Nodular crank, scat rods, icon dished pistons, Lunati HR 243/251@.050, .618/.622 lift, Edelbrock 72cc round port heads, 10.5:1, offy 2-4 intake, Edelbrock 650cfm carbs, Super T10 trans (2.64 first), BOP 10 bolt w/ Eaton posi and 3.36 gears |
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