Usual relationship is about half of idle vacuum, therefore with your 12 then around a 6 (5.5 or 6.5). This should be a starting point to test, however if you are happy with the present setting, then leave it. I notice you have jet extensions, are they standard? A friend just purchased a 2nd hand 4500 Dominator which had extensions in the secondaries and was flooding terribly. The float was catching on the extensions, make sure you have plenty of clearance on yours.
Holley tuning street HP 0-82751
Started by
rexy
, Nov 07 2014 06:35 PM
34 replies to this topic
#27
_alchemist_
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Posted 04 December 2019 - 09:20 AM
Sorry for digging up an old thread, just wondering if you managed to get your black plug issue under control? what was it in the end?
#28
rexy
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Posted 05 December 2019 - 10:59 PM
No need to apologise!
Yes, all sorted.
Just gradually pulled more fuel out of it (smaller jetting) until it was good. Fiddled with accelerator pump cams too.
Did cheat and buy an AFR gauge to help with the process.
#29
warrenm
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Posted 06 December 2019 - 05:36 AM
No need to apologise!
Yes, all sorted.
Just gradually pulled more fuel out of it (smaller jetting) until it was good. Fiddled with accelerator pump cams too.
Did cheat and buy an AFR gauge to help with the process.
That's not cheating, that's smart.
#30
UC308Hatch
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Posted 06 December 2019 - 07:04 AM
Hi Rexy, this thread just popped up on my feed this morning with much interest, as I am doing similar things with my hatch. Don’t suppose you still have a link for the gauge, as I am tempted to try the same? Regards RonNo need to apologise!
Yes, all sorted.
Just gradually pulled more fuel out of it (smaller jetting) until it was good. Fiddled with accelerator pump cams too.
Did cheat and buy an AFR gauge to help with the process.
Edited by UC308Hatch, 06 December 2019 - 07:05 AM.
#31
rexy
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Posted 08 December 2019 - 08:26 PM
This one.
17BC967A-4705-4E73-9B91-603B4AFE600F.jpeg 167.9K
6 downloads
6F376EE5-A93F-4470-8C65-ECB28D4B243F.jpeg 171.78K
6 downloads
8FEC45CB-F663-40A3-A087-CC65CCD2B42A.jpeg 290.75K
7 downloads
#32
UC308Hatch
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Posted 08 December 2019 - 08:30 PM
Awesome thanks Rexy, did you buy local or overseas?
#33
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Posted 08 December 2019 - 10:58 PM
Local. I try to support local business if I can. Also easier to sort out problems if they happen.
#34
YELLAcakeu308
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Posted 12 December 2019 - 07:26 AM
"The engine is a 383 holden, 11:3 comp, approx 240@50thou hyd roller cam, come alloy heads, redline hiwinder single plane manifold, 1.75 inch primary Tri Y pipes. Usually run BP Ultimate. Engine made an honest 480 plus HP and torque by 5500 on the engine dyno."
any video links?
that would sound cool
any video links?
that would sound cool
#35
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Posted 13 December 2019 - 07:12 AM
Sadly no. It now has a COME single plane intake on it too.
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