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#1 |
Registered User
Join Date: Jul 2014
Location: Pennsylvania
Posts: 23
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I6 292 help
Hi, I have a 67 c10 with a 292 from a 1980 dump truck so the notes say. So far I've only put Heddman headers on it. Next will be a new intake, so that leads me to a few questions if you gentleman wouldn't mind. I'm newer to the motor end of work. Done body work here and there so figured time to learn new.
Should I change out to a different carb? Looked at a few but not too many are manual choke. And I don't know what size to go, read some people suggested 650cc's but I'm not running anything special. Cam grinds, without doing any piston or valve work should I even bother? Thanks in advance. |
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#2 |
Senior Member
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Location: New Madison, Ohio
Posts: 21,365
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Re: I6 292 help
Here is a bump for you for those who have more knowledge on this engine than I
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#3 |
Registered User
Join Date: Jul 2014
Location: Pennsylvania
Posts: 23
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Re: I6 292 help
Bump.
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#4 |
Registered User
Join Date: Mar 2012
Location: Evanston
Posts: 304
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Re: I6 292 help
If it's from a 1980 then it's an integrated head and you can't replace the intake. Check that before you throw any money at it. You don't need a 670 carb on one of those. I wouldn't go over 400 they never get revved up so they don't flow much. If you're looking for performance get a set of lump ports and a torque cam and you will have a motor that runs forever and has plenty of power to go down the road.
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#5 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: I6 292 help
The intregal head was not used on 292 engines.
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#6 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,265
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Re: I6 292 help
I like the Offy intake and a 4 barrel. Currently I'm running the Edelbrock 1404 [manual choke], 500CFM. I have Clifford headers, long tube-types.
I have also run the Holley R8007, 4160, 390 CFM [converted to manual choke]. A good carb, but I think they're finicky. I did get 25 years and 250,000 miles out of it though. If your 292 came out of a dump truck, you likely have the 3-stud L6 factory cast iron exhaust manifold. They say those flow better than the 2-stud manifolds they put on light trucks. The Offenhauser intake will mate with factory exhausts. Clifford's manifold will not. The stock '80s intake may have a 2 barrel or Monojet. On my current L6 292 build, it's bored .030-over, Badger cast pistons, Crane 260H cam, 1.84" intake stainless valves [stock 307 V8], 1.5 exhaust, hardened seats, in a '68 C/10 Stepside with SM465 4-speed to 12-Bolt Corp rear @ 3.73 and Eaton Posi.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 10-15-2014 at 05:57 PM. |
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#7 |
Registered User
Join Date: Jul 2014
Location: Pennsylvania
Posts: 23
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Re: I6 292 help
Thanks!
Curosity what size are the bolts/nuts that hold headers/intake on? Or any bolt kits sold anywhere don't have any nuts that fit and I lost two nuts somehow. |
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#8 |
Registered User
Join Date: Dec 1999
Location: Northwest NJ
Posts: 746
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Re: I6 292 help
I have the 390 Holley on my 292 and it runs well. It was hard to tune though.
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#9 |
Registered User
Join Date: Jul 2010
Location: Willingboro, NJ
Posts: 489
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Re: I6 292 help
Tom Langdons Stove Bolt Chevy site is a good source for information. They also list a carb adapter plate and new style Weber carb set up. Never seen one of carb setups in person but they look pretty good. I'm on board with new carbs versus rebuilds in most cases. Just another option.
88Ironduke
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#10 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: I6 292 help
You might also want a copy of Leo Santucci's book "Chevrolet Inline six Power manual"
Lot's of good six cyl info in it.
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#11 | |
Senior Member
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Location: Tucson, AZ USA
Posts: 7,265
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Re: I6 292 help
Quote:
Studs [an aftermarket upgrade] are 3/8-16 on one end and 3/8-24 on the other. The fine-threaded end on the studs holds headers on better with a nut. Grade 8 or stainless is preferred.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 10-21-2014 at 05:59 PM. |
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#12 | |
Registered User
Join Date: Jul 2014
Location: Pennsylvania
Posts: 23
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Re: I6 292 help
Quote:
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#13 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,265
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Re: I6 292 help
No problem, my friend. I concur with Panel Deland on reading Leo Santucci's book. It's my reference source.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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