Thread: Roush 427R and Quick Fuel QFT 750 jet sizes?
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Old 11-03-2013, 07:47 AM
ha_pe_1968 ha_pe_1968 is offline
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Join Date: Jan 2010
Cobra Make, Engine: SPF 2234 Diamond Edition, Roush 427R
Posts: 145
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yeah i thought the same...for this type of cam i should run a 4.5 or 4 PV. At the carburator there was a 6.0 installed and it was very lean below 2000 rpm - so lots of stumble. I get an advice to go with the PV to 9.5 and it was a lot better.
But think the right way will be to go with a 4.5 PV and increase the primary main jets.
Thats why i was asking for infos from other members with the same engine.

Peter
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