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Author Topic:   Rejetting a Holley....
Mustang Man
Gearhead

Posts: 332
From: Howe Indiana USA
Registered: Jul 2000

posted 10-15-2002 04:40 PM     Click Here to See the Profile for Mustang Man   Click Here to Email Mustang Man     Edit/Delete Message   Reply w/Quote
I just purchased a new 500 Cfm Holley 2 Bbl for my 200 six popper....

Right now I'm playin with the jetting. It came with #73 jets and I automatically rejetted it to #70's thinking it would be too rich.

I cleaned the plugs and then drove it around and hammered on it a bit then when I pulled a couple of the plugs out I made the discovery that it was to lean. Plugs were basically white after driving it 15 miles.

I'm going to jump up a couple of sizes and drive it around again then recheck the plugs to see what color they are.

Am I doing this right (rejetting then driving around a few miles then checking color of plugs)??

I bought a Holley jet assortment so I have all the jets to play with.

Also I noticed that when I leaned it out (jet size) Performance dropped off a bit.

Here's a pic of it,

Hopefully it worked...

It's mounted directly on the intake (no adapter plate) and the engine is not stock in any sense of the word

It runs VER QUICK!!
Thank's,

Doug

[This message has been edited by Mustang Man (edited 10-15-2002).]

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capri man
Gearhead

Posts: 7611
From: doerun, ga.
Registered: Nov 2000

posted 10-15-2002 08:43 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
your first mistake was thinking that you knew more about carbs than holley!!!! they usually run just great right out of the box. holley has forgot more about carbs than you and me will ever know!! put it back like they made it and try it!!

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

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Mustang_Geezer
Journeyman

Posts: 2
From: Indiana
Registered: Jul 2002

posted 10-15-2002 09:13 PM     Click Here to See the Profile for Mustang_Geezer   Click Here to Email Mustang_Geezer     Edit/Delete Message   Reply w/Quote
Sorry.....I assumed that the reason Holley sold parts was so that the customer could tweak their product

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Mustang Man
Gearhead

Posts: 332
From: Howe Indiana USA
Registered: Jul 2000

posted 10-15-2002 09:16 PM     Click Here to See the Profile for Mustang Man   Click Here to Email Mustang Man     Edit/Delete Message   Reply w/Quote
That's actually me.....Don't want anyone to get confused....

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mustangboy
Gearhead

Posts: 1147
From: Ont, Canada
Registered: Mar 2002

posted 10-16-2002 05:42 PM     Click Here to See the Profile for mustangboy     Edit/Delete Message   Reply w/Quote
If you've picked the right carb for your application it should be close right out of the box.I would have tried it stock and then tried going up or down depending on what it was doing.I realize you don't have an every day application but it sounds like it may have been close out of the box.If you can take it to the strip jet up until your mph starts to fall off and then go back down to your best or a tad richer just for safety.

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