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05-05-2012, 01:41:25 PM
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#16
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Lifetime Gold Member
Join Date: Oct 2006
Location: Skating away on the thin ice of a new day...
Posts: 9,214
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a 75 jet is a good place to start... be careful of timing in case thats lean..
I would measure vacum at idle, then divide by 2 and subtract 1 for power valve
(measured vac/2)-1= ballpark
__________________
Wayno - And yeah.....after meeting everyone....I can say this is the coolest,
most 'will help you out with burying a body' type of people I have ever had the pleasure
of meeting and hanging out with.
Marks71BB-There is a lot of support on this board. when yer down, we are here for ya,
and if yer up, we are here for ya, but when ya act like an a$$, we are even MORE here for ya.
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05-05-2012, 01:51:54 PM
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#17
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Gold Member
Join Date: Apr 2012
Location: Sparks, Nevada
Posts: 446
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Quote:
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Originally Posted by K5JMP
a 75 jet is a good place to start... be careful of timing in case thats lean..
I would measure vacum at idle, then divide by 2 and subtract 1 for power valve
(measured vac/2)-1= ballpark
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Thanks again, Off to Summit racing I go...lol It is nice having a summit here in town.
Bill |
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05-05-2012, 01:52:39 PM
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#18
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Lifetime Gold Member
Join Date: Oct 2006
Location: Skating away on the thin ice of a new day...
Posts: 9,214
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check this thread.. some cars with a big cam will break that rule..
http://www.nastyz28.com/forum/showthread.php?t=240351
__________________
Wayno - And yeah.....after meeting everyone....I can say this is the coolest,
most 'will help you out with burying a body' type of people I have ever had the pleasure
of meeting and hanging out with.
Marks71BB-There is a lot of support on this board. when yer down, we are here for ya,
and if yer up, we are here for ya, but when ya act like an a$$, we are even MORE here for ya.
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05-05-2012, 04:05:24 PM
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#19
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Lifetime Gold Member
Join Date: Feb 2004
Location: Podunk, CT
Posts: 10,882
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Quote:
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Originally Posted by Mr.Bill
OK, Update.. The jets are 80, The 0 is just hard to see, The power valves are 6.5, My son says with the big cam I have and low vac I should try 4.5 power valves and maybe a 75 jet.
The cam is a comp 598/598 heads are Merlin rec ports.
Input?
Thanks again.
Bill
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A rule of thumb is to have the PV 2 lower than the vacuum your pulling at idle. Have you put a vacuum gauge on it? What is a comp 598/598 cam? What kind of motor is this? Maybe an 850 is just too big?
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If I'm curt with you, it's because time is a factor here. I think fast, I talk fast, and I need you guys to act fast if you want to get out of this. So, pretty please, with sugar on top, clean the f'ing car.
I am the proud parent of a child whose self-esteem is sufficient that she doesn’t need me advertising her minor scholastic achievements on the bumper of my car
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05-05-2012, 08:17:41 PM
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#20
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Gold Member
Join Date: Apr 2012
Location: Sparks, Nevada
Posts: 446
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Quote:
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Originally Posted by theflash
A rule of thumb is to have the PV 2 lower than the vacuum your pulling at idle. Have you put a vacuum gauge on it? What is a comp 598/598 cam? What kind of motor is this? Maybe an 850 is just too big?
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Update: Car is running great, I removed the 80 jets and installed 74p/76s and changed the pv from a 6.5 to a 4.5, I am also having a air filter issue, The filter I can fit under the hood is not letting enough air to the carb, Not sure what I am going to do about this...lol
The motor is a 468 BBC with Merlin rec port heads, Not sure on the compression yet. It has headers and a big cam.
Just got the car last week and I have a lot of cleaning up to do
Thanks for everything guys.
Bill
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05-06-2012, 08:38:44 PM
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#21
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Veteran Member
Join Date: Oct 2002
Location: Burbank,CA,USA
Posts: 137
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I totally dig that green! Nice car, glad it's running better.
__________________
Paul
11.93 at 121 mph
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