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Author Topic:   Four corner idle adjustment
V8 Thumper

Posts: 4044
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 04-19-2003 10:03 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Is there any trick to it?

On my 3310, I drilled holes in the primary butterflies to facilitate idle tune, and it worked. Am I likely to need to do the same to a DP? If so, would I drill both primary and secondary butterflies?

You guys are going to get real tired of me asking DP questions

1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle

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Posts: 21725
From: Lyons, IL, USA
Registered: May 99

posted 04-19-2003 10:09 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I would not drill anything yet Todd.
Try it our with a 5.5 or 4.5 PV first.

Alex Denysenko
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Posts: 2160
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 04-19-2003 11:27 AM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
Todd, you can also turn the carb upside down and adjust a little more opening in the secondaries with the small set screw in the back if you need a tad more airflow after the PV change. I'd try the PV first though. I will admit to drilling the butterflies in the past, but that little adjustment screw is there if you need it.

69 Mustang Pro ET Drag
70 Mustang retired former footbrake car
Jimmy: ( S-10 driver/friend ) Hey Jer how do you like my flames I painted on the old Bowtie?
Jerry: Nice but you didn't have to do that, if you ever get it going fast enough at the strip it'll catch fire.

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