Re: Vacuum with Lunati 60303
[Re: Chilort]
#625101
03/01/10 01:18 PM
03/01/10 01:18 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Worked with a number of things and got the vacuum up to about 13 in hg. I have the Park/Neutral engine speed sent to around 750rpm. It drops quite a bit when in gear. Played with the idle mix screws a bunch. Seems to run really nice. Thanks for the help.
dropping a lot in gear means your distributor is starting to advance the timing below your 750RPM idle. put it in gear, idle drops, which pulls timing, which drops the idle further. you need to recurve your distributor with a slightly stiffer spring so your mechanical advance doesn't start advancing until ~900 RPM....
also, I'd run that cam with about 14-16 degrees initial advance and ~38 total. you may need to reduce the amount of mechanical advance in your distributor to get the 22-24 degrees of mechanical advance. you do that by welding up the slots in the advance place. if you weld to the inside of the slots, that'll increase the spring preload, which will raise the start RPM of your mechanical advance
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Re: Vacuum with Lunati 60303
[Re: DaytonaTurbo]
#625103
03/01/10 05:11 PM
03/01/10 05:11 PM
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Joined: Sep 2004
Posts: 1,226 Cookeville
Chilort
OP
Will Work For Mopars
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OP
Will Work For Mopars
Joined: Sep 2004
Posts: 1,226
Cookeville
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Converter is 17501 from Turbo Action. I am actually running 16* advance initial (IIRC) but need to double check it. I was trying to set it to get max vacuum at idle and I think it was 16*. I may have backed it off some so that I would run less risk of going over 36* total but didn't back it off too far from 16* I am using a Mopar Performance distributor that supposedly has 24* mechanical advance as setup at the factory and I have not verified those numbers (though I've never seen anyone contest the factory setup). If that is true then I need to adjust the total mechanical advance but I have never done that before. Also, I think I can adjust when the advance starts with this dizzy too but haven't done that either. The dizzy came with zero instructions, which isn't very helpful.
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