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Author Topic:   Help on setting up my 850DP

Posts: 733
From: Clarion PA
Registered: Nov 2000

posted 08-12-2001 10:36 PM     Click Here to See the Profile for Rustang   Click Here to Email Rustang     Edit/Delete Message   Reply w/Quote
Next week I'm going to try my 850DP on my 358" Clevor. Any recommendations on where to start with jetting, pump shooter size, etc.? I've never run this carb before, so have no real baseline. Here's how it's currently equipped: Jets: 71primary, 81 secondary. 2.5 PV, 50cc secondary pump with blue cam, standard primary pump with orange cam. shooter size is 28 primary, 31 secondary. The car weighs 3100# and has a tight converter, 4.33 gear and 29" tall tires. I shift around 7500rpm. Best run so far, with an 800DP, was 10.93@123.


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Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000

posted 08-12-2001 10:52 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Are you launching flat footed against the convertor or two step? If you are, the accel pumps and cams don't matter much. The power valve is only good for about 4 jet sizes. It would be nice to see it end up "square". I'd up-size the primaries.


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Posts: 312
From: Blackburn, Victoria, Australia
Registered: Nov 2000

posted 08-15-2001 07:19 AM     Click Here to See the Profile for Clevo377   Click Here to Email Clevo377     Edit/Delete Message   Reply w/Quote
I would start with 80's in the front. How much vacuum do you have at idle? 2.5PV is pretty low.


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