Carb question

pobi442 · 04-05-2008, 02:24 AM

Dear all.

I have 69´ 442 with 400+400 from Canada. It has Edelbrock Performer intake and 650 Edelbrock carb (around 3 years old) with headers and 3 inch dual exhaust. Cam. might be original. Isit sennsible to exchange the carb (not possible to adjust ex. idle speed) to BG Road JR (to 625 or 725???)? Isit here somebody who have done that before and give some tips and differences.

BTW: Rear end is changed 3,31(broken satellites) to 3,23.

BR

Timo

gearheads78 · 04-05-2008, 06:43 AM

I would either run a Q-jet or a real Holley and I would lean to the Qjet unless you are trying to make big power. Qjet is the best bet for mild to upper medium performance. BG junk is only worth its weight in scrap IMO.

Oldsguy · 04-05-2008, 08:48 AM

Barry Grant carbs sure look nice and my buddy thinks they are great, what with having no gaskets below the fuel level in the fuel bowl and all. I can't say as I have never used one.

edit: with good gaskets and maintenance, Q jets, Holleys, and Edelbrocks don't leak either though.

pobi442 · 04-06-2008, 03:13 AM

Thanks for the answer. And wich size is recommended to choose, 650 or 750? It has 600 now and time to time it loose power during the accelration.

rocket69 · 04-06-2008, 03:40 PM

750! Hell yeah!

Rallye469 · 04-06-2008, 04:20 PM

I've been using a Quick Fuel Technologies 830 for 2 years now.
It's a holley design and it's been great.
They will basically build you a custom carb for your application.
Weight, gears, TC, cam, cid...it all plays into the perfect carb.

And the best thing is it cost less then a similarly equipped holley.
http://www.quickfueltechnology.com/home_2.htm

pobi442 · 04-07-2008, 11:43 PM

So, I decide to take Holley 650 (1450). Any experience with this one, it seems to be a new model. Differences between mech. and vacuum secondaries during the adjustment? I hope it is good choice bec. I do not have any experience with carbs from US on the US car ex. Edelbrock. Or some another model fit better on the 400, recommendations?

BTW: Isit nessesary to change the mech. fuel pump to electrical and to use pressure regulator in the fuel line?

pobi442 · 04-18-2008, 02:11 PM

J-(Chicago) · 04-18-2008, 02:51 PM

You can keep the mechanical fuel pump.

pobi442 · 05-05-2008, 02:12 PM

I´m wondering to get some feedback from anothers for fuel consumtion. What can be avarage fuel consumption with 400/455 on the highway (60mph) and in the city? Last summer I get 10 mpg on the highway and 7 mpg on the city. Rear end was 3.31 with 245/50/14 tires.

Tim

04-05-2008, 02:24 AM	#1 (permalink)
pobi442 Junior Member Join Date: Dec 2006 Location: EU Posts: 11	Carb question Dear all. I have 69´ 442 with 400+400 from Canada. It has Edelbrock Performer intake and 650 Edelbrock carb (around 3 years old) with headers and 3 inch dual exhaust. Cam. might be original. Isit sennsible to exchange the carb (not possible to adjust ex. idle speed) to BG Road JR (to 625 or 725???)? Isit here somebody who have done that before and give some tips and differences. BTW: Rear end is changed 3,31(broken satellites) to 3,23. BR Timo Last edited by pobi442 : 05-05-2008 at 02:04 PM.

04-05-2008, 06:43 AM	#2 (permalink)
gearheads78 Senior Member Join Date: Apr 2008 Location: Dallas TX Posts: 314	I would either run a Q-jet or a real Holley and I would lean to the Qjet unless you are trying to make big power. Qjet is the best bet for mild to upper medium performance. BG junk is only worth its weight in scrap IMO. __________________ 66 Cutlass ragtop my way

04-05-2008, 08:48 AM	#3 (permalink)
Oldsguy Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 3,167	Barry Grant carbs sure look nice and my buddy thinks they are great, what with having no gaskets below the fuel level in the fuel bowl and all. I can't say as I have never used one. edit: with good gaskets and maintenance, Q jets, Holleys, and Edelbrocks don't leak either though. __________________ Dan '77 Cutlass Supreme '46 2 door

04-06-2008, 03:13 AM	#4 (permalink)
pobi442 Junior Member Join Date: Dec 2006 Location: EU Posts: 11	Thanks for the answer. And wich size is recommended to choose, 650 or 750? It has 600 now and time to time it loose power during the accelration. __________________ 442x2 (FL,CAN) Last edited by pobi442 : 04-06-2008 at 03:15 AM.

04-06-2008, 04:20 PM	#6 (permalink)
Rallye469 Senior Member Join Date: Feb 2008 Posts: 236	I've been using a Quick Fuel Technologies 830 for 2 years now. It's a holley design and it's been great. They will basically build you a custom carb for your application. Weight, gears, TC, cam, cid...it all plays into the perfect carb. And the best thing is it cost less then a similarly equipped holley. http://www.quickfueltechnology.com/home_2.htm __________________ '70 Rallye 350 '65 F-85 http://www.youtube.com/watch?v=CCw-JmwNGZQ Last edited by Rallye469 : 04-06-2008 at 04:25 PM.

04-06-2008, 03:40 PM	#5 (permalink)
rocket69 Member Join Date: Aug 2007 Posts: 26	750! Hell yeah!

04-07-2008, 11:43 PM	#7 (permalink)
pobi442 Junior Member Join Date: Dec 2006 Location: EU Posts: 11	So, I decide to take Holley 650 (1450). Any experience with this one, it seems to be a new model. Differences between mech. and vacuum secondaries during the adjustment? I hope it is good choice bec. I do not have any experience with carbs from US on the US car ex. Edelbrock. Or some another model fit better on the 400, recommendations? BTW: Isit nessesary to change the mech. fuel pump to electrical and to use pressure regulator in the fuel line? __________________ 442x2 (FL,CAN) Last edited by pobi442 : 04-12-2008 at 12:24 PM.

04-18-2008, 02:11 PM	#8 (permalink)
pobi442 Junior Member Join Date: Dec 2006 Location: EU Posts: 11	? __________________ 442x2 (FL,CAN)

04-18-2008, 02:51 PM	#9 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 1,650	You can keep the mechanical fuel pump. __________________ I'd rather have a numbers matching poker hand.

05-05-2008, 02:12 PM	#10 (permalink)
pobi442 Junior Member Join Date: Dec 2006 Location: EU Posts: 11	I´m wondering to get some feedback from anothers for fuel consumtion. What can be avarage fuel consumption with 400/455 on the highway (60mph) and in the city? Last summer I get 10 mpg on the highway and 7 mpg on the city. Rear end was 3.31 with 245/50/14 tires. Tim __________________ 442x2 (FL,CAN)

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