08-14-2017, 06:29 PM | #121 |
Senior Member
Join Date: Jan 2012
Location: New Jersey
Posts: 1,425
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Re: Vacuum signal
I just install 68 primary jets, 72 secondary jets, a 10.5 in. power valve and a purple vacuum secondary spring. Hopefully, I'll get a chance to take it for a ride tomorrow after work! If I do, I'll post the results.
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08-14-2017, 07:20 PM | #122 | |
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Join Date: Feb 2017
Location: Bloomfield,ny
Posts: 130
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Re: Vacuum signal
Quote:
Nothing ventured nothing gained!! Sent from my iPad using Tapatalk |
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08-28-2017, 04:27 AM | #123 |
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Join Date: Jan 2012
Location: New Jersey
Posts: 1,425
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Re: Vacuum signal
I think I finally got a good tune on the carb! I'd like to hear what everyone thinks.
I have 72 jets in the primary, 76 jets in the secondary, a 10.5 in. power valve and a purple vacuum secondary spring. At wide open throttle, as boost starts to come in, the air/fuel ratio is about 13.3. As the boost rises to 3 lbs., it gets a little richer at 12.6 When I'm cruising in 5th gear, 65 mph, around 2000 rpm, depending on my foot, I'm getting readings of 12.9-15.3. Of course, it gets richer as I apply more throttle. Uphill in 5th gear,half throttle, 4 barrels in and 1.5-2 lbs. of boost, I'm at 11.9-12.6 I can hear the 4 barrels come in at about half throttle. This is with 91 octane. Is there anything else I should be looking for? Thanks, Joe |
08-28-2017, 03:54 PM | #124 | |
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Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,529
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Re: Vacuum signal
Quote:
Hi Joe Its been a while since I have looked at your post been to busy setting records at Speedweek on the Salt Flats 216.131 MPH then let my son really get on the car 225.003 MPH but now I'm back on line looking at stuff. In my opinion what you have posted is really good your primary jet size is exactly what I run using that size carb the air fuel readings are fine I see no reason for any concern. As you posted your not looking for economy just a good running combination that's safe and with reliability I feel you have accomplished your goal. Adding to that you have also learned how to tune the combination so in the future you can help guide others when needed. Ronnieroadster |
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08-28-2017, 04:05 PM | #125 | |
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Join Date: Jan 2012
Location: New Jersey
Posts: 1,425
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Re: Vacuum signal
Quote:
Thanks again, Joe |
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