Jetting a Holley 750 for turbo

[flatfire]

Hi Guys, has anyone used a holley 750 for a turbo application?

I have a 750 holley and I am almost finished my turbo engine. I want a starting point as far as primaries and secondaries are concerned.
Engine 84 crank 94mm pistons AJ Sims LB 5 cam and AJ sims prepped comp eliminators good for in excess of 400 hp.

I want to dial in the car with perhaps 12 psi of boost. The primary in the carb is 70 the secondary 76. The turbo kit is a Ron Lummus.

cheers
Peter

[Martin Greaves]

Peter is the power valve blocked off.

[Udo]

I think if you have the carburator from ron the jets would be ok for testing

Udo

[flatfire]

Peter is the power valve blocked off.

No Martin the Power valve is open.

Your right Udo the carb should be okay. Ron jets them to suit a particular engine. Being a tight Scot, I bought the turbo kit secondhand even though the kit looked brand new.

Thanks for all the replies

[Martin Greaves]

You got a PM.

[dragvw2180]

 Since your power valve is boost referanced you may want to go to the Holley website and retrieve the formula for determining the size power valve you need.  All the jetting in the world will be tough until you get the right power valve in it. Every combo is differant but for referance mine is 4.5  .   Mike

[Dominick Luppino]

If Ron set the carb up originally it should be close.

[flatfire]

Thanks guys. I will post my up the information I gather once the engine is up and running.

[jamiep_jamiep]

Thats interesting Mike, I'm just referencing my Holley 650 DP now (its plugged at the moment) and have beena dvised to run the lightest possible.... I have a 4.5 already however so may give that a try....