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Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
Quite a regular
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2010/12/28 1:13
From western Canada
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Needing to do engine break in on a new A15.

H89 Head.
Roller Rockers.
High Duration Cam.
Forged Wiseco Pistons and Custom Forged Rods.
Massive Titanium Valves with Twin springs.
Header.
Electric fuel pump and regulator.
Have Port Matched Intake for either 32/36 or 38.

Needing to find our what it should be jetted at for initial break in. And also for more street driving than racing for this motor.

Cheers

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Posted on: 2015/3/12 3:05
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Re: Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
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From 48 North
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Baseline jetting is
Carb: 32/36
Main jets: 140/140
Emulsion tubes: F50/F50
Air correction jets: 170/160
Idle jets: 60/50
Pump jet: 50
Needle valve: 2.00

With the baseline jetting, you can start the engine and break-in the cam.
Before driving it, adjust idle speed and idle mixture. Then you can drive.it to see what jetting changes it may need.

The 38/38 needs different jetting as the venturis are larger.

Posted on: 2015/3/12 3:26
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Re: Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
Home away from home
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Hey squids what did ur set of roller rockers cost u?
Cheers Corey

Posted on: 2015/3/12 3:32
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Re: Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
Quite a regular
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Once again many thanks DD.

Posted on: 2015/3/12 3:35
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Re: Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
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Corey they were about 500 including shipping. Also bought racing mushroom lifters with the roller rockers and used forged chev 350 pushrods which were resized for the application.

Posted on: 2015/3/12 21:24
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Re: Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
No life (a.k.a. DattoMaster)
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To get the real potential out of the engine with the components described. Using a single a-synchronous down draft carb will be of little benefit. Whats the static and /or dynamic compression ratio. What fuel do you intend on using. What are the actual specifics of the cam and Valve dimensions. Are you chasing high torque numbers or peak HP.

Posted on: 2015/3/13 2:17
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Re: Looking for jetting info for a worked A15 using either 32/36 or 38 carb.
Quite a regular
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2010/12/28 1:13
From western Canada
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Compression ratio is 10.9:1. Will only be using this carb for initial cam break in. I will be using twin 40mm Dellorto's for the finalist tuning. I have all the specs at the shop I'll pm them to you if you'd like to lend some advice. The car is a 1979 210 sedan. Complete restoration. H190 rear end. Have 3 different gearboxes. Wildwood calipers all around. stock suspension for now. Just a fun street car for here. Super rare now .

Posted on: 2015/3/21 0:54
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