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holley blow through system what to do
Posted: Fri Jun 29, 2007 8:29 pm
by ToyRover
what do you have to do to set a holley 450 up for a blow through system for a turbo
Posted: Fri Jun 29, 2007 11:36 pm
by xorph
Ive heard that you can pressurise the float chamber with a fitting and line from the manifold, just remember to inject space invader into the float with a syringe or apparently it will crush or split under pressure.... or some people put the entire carb in a sealed chamber under pressure.
HAvent done it myself but looked into it for breif while.
Posted: Sat Jun 30, 2007 12:34 pm
by DJ
where do you start ???
the blow thru system will require the holley carb to be pressurised and the standard float to be replaced with a nitrohyl type ( holley part No 16BP 260A) or (16BP 451A) If the entire carb is sealed then very little modifications are required since internal and external pressure is equal.
When I looked at turbo charing my Pontiac I desided that for all trouble of making air boxes and pressure senstive fuel pumps and area restritions it was far easier to use a draw thru system. This is working fine with no problems so far. Although I have used some of Pontiacs factory fitted turbo parts. I suggest you buy the Holley Caruretors tuning and modiffying book
cheers