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Author Topic:   holley
Whitelightning
Dirt Freak

Total posts: 429
posted May 30, 2005 08:36 PM  
I just bought a new holley 4150 and engine ask for 73 jets and 70 came in it how hard is it to change the jets. I always had quadrajunks untill now.

Steve Dupree
Dirt Freak

Total posts: 316
posted May 31, 2005 04:42 AM  
Very easy to change on a holley just pull the front 4 screws in the front bowl and there you have the metering block and jets. Be sure to get you a couple of bowl and metering plate gaskets so you have them if something goes wrong when you are changing the jets. Autozone should have what you need but if it hasnt been run you probally wont have any problems. If the bowl seems a little stuck just tap lightly with the handle end of a screw driver. Be sure to check your plugs when you have put the jets in every motor uses different jets. I would also find what reads good on the plug and have like a size below and above so when its humid or cool you could jet down for best output.

ispin
Dirt Full Roller

Total posts: 48
posted June 03, 2005 07:19 AM  
Be sure to check the power valve diaphram for leaks! This is also located on the metering block (back side).

    

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