Wanted Holley Carb Help
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Chad Carson
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From: South of Nashville TN. USA
Wanted Holley Carb Help
Ok, have a holley question on a rx7 I just got.
The car has a 600 or 650 holley carb and well when you hit wide open throttle it falls on it face! Once you milk it a little she pulls hard and all the way to 8k.
Motor is streetported, fuel pump upgraded, and fuel pressure is around 6psi.
Also it idles at 2000-2500
Want to try to get this to run good where I can daily drive it.
Really would want to swap it out for a Webber 45DOCE or Dell48 but
dont have one right now.
Honestly know nothing about holley carbs so it will be learning something new for me.
The car has a 600 or 650 holley carb and well when you hit wide open throttle it falls on it face! Once you milk it a little she pulls hard and all the way to 8k.
Motor is streetported, fuel pump upgraded, and fuel pressure is around 6psi.
Also it idles at 2000-2500
Want to try to get this to run good where I can daily drive it.
Really would want to swap it out for a Webber 45DOCE or Dell48 but
dont have one right now.
Honestly know nothing about holley carbs so it will be learning something new for me.
Last edited by Fire85GSLSE; Nov 7, 2008 at 10:23 PM.
well you need to find out if it is a 600 or 650. did you try adjusting the idle screw by the linkage? is it a vaccum secondary or mechanical?
Last edited by RXnos1200; Nov 7, 2008 at 10:17 PM.
Thread Starter
Chad Carson
iTrader: (29)
Joined: Nov 2001
Posts: 7,010
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From: South of Nashville TN. USA
The model number is on the front of the air horn. You can find all the info about it on Holley's website. http://www.holley.com/
post some pics of the left and right side of the carb...
Also on the float bowls the one facing the driver side there shold be a part number...that part number relates to what size the carb is...once you find that just call jegs and they will tell you what size the carb is...But don't ask them how to tune it...
Post the pics and let us know what you find out...
Also on the float bowls the one facing the driver side there shold be a part number...that part number relates to what size the carb is...once you find that just call jegs and they will tell you what size the carb is...But don't ask them how to tune it...
Post the pics and let us know what you find out...
I put a holley on my RX-7 once. Exact same problem as you described. I fooled around with it but never got it to go right. It was not originally setup for a rotary. I fooled around with jets, pump cams, and such. I was glad to put the twin Webers on.
I had an RX-4 once with a professionally builty holley. Guy in B'ham, AL set it up. It ran beautifully - even when cold. I know he machined off the choke air horn and did a bunch of other stuff to it. Ron down in Florida has that car now.
I had an RX-4 once with a professionally builty holley. Guy in B'ham, AL set it up. It ran beautifully - even when cold. I know he machined off the choke air horn and did a bunch of other stuff to it. Ron down in Florida has that car now.
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Caffeine x3
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From: Somewhere in Russia...
yeah, honestly i'd stick with the Weber dual trumpet carburetors, and you can find'em pretty easily, and they're made for smaller displacement motors, like VW and what not. i just ordered: http://www.tweakit.net/shop/product_...roducts_id=104, and: http://racingbeat.com/FRmazda1.htm, 
