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Old 07-16-2017, 06:36 PM   #1
NeverDone50
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Swapped the 235 for a 292, need some tuning info

A 292 from a 67 c20 with 46k original miles was practically given to me so I've done the swap and the motor runs good. I just can't find what the idle rpm, dwell, etc. are to tune it up right.
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Old 07-16-2017, 09:44 PM   #2
1project2many
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Re: Swapped the 235 for a 292, need some tuning info

Dwell is the same as your 235, 32 degrees. Point gap is .019" new, .016" used. Timing set at 4 deg BTDC @ 600 rpm. Plug gap is .035".

HTH
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Old 07-17-2017, 10:05 PM   #3
NeverDone50
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Re: Swapped the 235 for a 292, need some tuning info

Perfect, thanks! I'm about ready to get this thing on the road.
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Old 07-18-2017, 11:45 AM   #4
OrrieG
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Re: Swapped the 235 for a 292, need some tuning info

Over at stovebolts there is a good tech article on converting a later model HEI to use in earlier sixes if you want to go that route.

https://www.stovebolt.com/techtips/HEI_mini.html
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Old 07-18-2017, 08:05 PM   #5
55dude
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Re: Swapped the 235 for a 292, need some tuning info

here is a tech article i wrote up 10 years ago on the H.A.M.B to put a 250 gm HEI in a 235 chevy for future reference, cheap and easy! https://www.jalopyjournal.com/forum/.../#post-2039642
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Old 07-18-2017, 08:06 PM   #6
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Re: Swapped the 235 for a 292, need some tuning info

any pictures of the engine,transmission mounts? sounds cool!
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Old 07-18-2017, 11:46 PM   #7
GreasyLikeaBurger
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Re: Swapped the 235 for a 292, need some tuning info

Quote:
Originally Posted by 55dude View Post
here is a tech article i wrote up 10 years ago on the H.A.M.B to put a 250 gm HEI in a 235 chevy for future reference, cheap and easy! https://www.jalopyjournal.com/forum/.../#post-2039642
Thanks 55Dude, I saved that as one of my watched pages on the HAMB.
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Old 08-08-2017, 10:22 PM   #8
NeverDone50
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Re: Swapped the 235 for a 292, need some tuning info

Quote:
Originally Posted by 55dude View Post
any pictures of the engine,transmission mounts? sounds cool!
Not the best of pictures, but I modified the original cross member that the bell housing sits on and then boxed in the frame. I bought a pair of sbc motor mounts made for my truck, but had to slightly modify them as well. Overall, it was not too hard for this rookie mechanic.
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Old 08-29-2017, 11:18 PM   #9
evilokc
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Re: Swapped the 235 for a 292, need some tuning info

I always wanted to pump up a 292 and maybe turbo it for my truck. they are cool motors man.
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Old 08-29-2017, 11:52 PM   #10
Dan in Pasadena
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Re: Swapped the 235 for a 292, need some tuning info

Guys used to really hotrod the 292 and big GMC sixes (300+ cu. in.) I had a buddy with a '66 C10 with a solid running 29 and a 700R4 behind it. That truck ran great and pretty damn strong too.
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