250 OHC sprint engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Inspector722 · 02-14-2005, 06:22 PM

Has anyone had any dealing with this engine.

rustyold72 · 02-14-2005, 06:31 PM

It's a Pontiac engine (IIRC) so if you're thinking about swapping it into your truck you'll need an adapter for the trans.
Came in Firebirds, and (I think Tempests) GMs answer to the European sports cars OHC engines, sorry, other than that I don't know anything else about it

cdowns · 02-14-2005, 06:42 PM

the heads had a tendancy to warp and crack under heavy usage. they were built for the LaMans sort of like a preppie poormans GTO

stelth2002 · 02-14-2005, 06:47 PM

wow, someone interested in that thing. They have some advantages. One being that you can turn them into a 292. The other being that they seem to flow better. I have no hard evidence of this. I would like some. Unfortunatly they use a timing belt, not gears, so they do have some problems there. The intakes and what not interchange between them, but i dont think it would be worth it, unless thats exactly what you want.

Inspector722 · 02-14-2005, 07:01 PM

Wasn't sure. Thought it looked interesting.

oldsub86 · 02-14-2005, 07:04 PM

A friend had one in a Firebird that he bought new and kept forever. He said the motor was junk and ultimately swapped it to a non overhead cam I6 - a 250 I think and it was in the car until he wore it out totally and sent it to the scrap yard.

He is a fellow who has had some "different cars". In addition to the OHC I6 Firebird, he has had a Porsche 914 (you know the non-Porsche, Porsche) and 2 old MB diesels. He has not had really good luck. The Porsche looked pretty good but turned out to be too rusty underneath to justify repair (esp since he couldn't do it himself). The first MB got a bit wrecked when he hit a deer. The most recent MB has had quite a bit of work and doesn't look too bad but still needs more work - expensive when you have to hire it done.

3 on the tree · 02-15-2005, 12:02 AM

215 horses, 10.25 comp, ratio, price a camshaft before you put any money into it, then you will probably run the other way. Same problem with the Hurricane OHC that Kaiser used in their military pickups-parts availability sucks.

shortymac83 · 02-15-2005, 12:15 AM

uhh...they're kickass motors? IIRC, the cams go flat on them, and it also has some oiling issues keeping the valvetrain lubed up, but aside from that, they're just as good as the OHV motors. there's a black tempest sprint about 30 minutes south, in rust-free but faded condition. It still has the OHV badges on it. Very cool.

**'68OrangeSunshine** · 02-15-2005, 07:07 AM

Is that a Q-Jet on a stock manifold?!

I've heard of the Pontiac 250 mentioned on
www.inliners.org
but I've never seen one, myself.

Dano69c10 · 02-15-2005, 01:45 PM

You can ship it out to me and I will dispose of it for you...

Dano

02-14-2005, 06:22 PM	#1
Inspector722 Fixing my 67, & loving it Join Date: Jun 2004 Location: Bridge City, Texas Posts: 524	250 OHC sprint engine Has anyone had any dealing with this engine. __________________ Email address- inspector722@aol.com Zip Code- 77611 Shipping- DHL & USPS Working on: 67, large back glass, 307 V8, 200 4R, 3.73 rearend, Short Stepside Bed Last edited by Inspector722; 02-14-2005 at 06:57 PM.

02-14-2005, 06:31 PM	#2
rustyold72 Registered User Join Date: Oct 2003 Location: Ark City KS Posts: 505	It's a Pontiac engine (IIRC) so if you're thinking about swapping it into your truck you'll need an adapter for the trans. Came in Firebirds, and (I think Tempests) GMs answer to the European sports cars OHC engines, sorry, other than that I don't know anything else about it __________________ 71 Chevy C10 "The Rust Bucket" 72 Chevy C10 apart in the garage 02 WS6 T/A Fast Black and bad@$$ 93 Nissan Pathfinder "Emily" Totaled RIP girl 05 Jeep Grand Cherokee-HEMI powered 87 Iroc Z28 305 TPI auto (crying out for an LS1 swap)

02-14-2005, 06:42 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	the heads had a tendancy to warp and crack under heavy usage. they were built for the LaMans sort of like a preppie poormans GTO __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

02-14-2005, 06:47 PM	#4
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	wow, someone interested in that thing. They have some advantages. One being that you can turn them into a 292. The other being that they seem to flow better. I have no hard evidence of this. I would like some. Unfortunatly they use a timing belt, not gears, so they do have some problems there. The intakes and what not interchange between them, but i dont think it would be worth it, unless thats exactly what you want. __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

02-14-2005, 07:01 PM	#5
Inspector722 Fixing my 67, & loving it Join Date: Jun 2004 Location: Bridge City, Texas Posts: 524	Wasn't sure. Thought it looked interesting. __________________ Email address- inspector722@aol.com Zip Code- 77611 Shipping- DHL & USPS Working on: 67, large back glass, 307 V8, 200 4R, 3.73 rearend, Short Stepside Bed

02-14-2005, 07:04 PM	#6
oldsub86 Registered User Join Date: Dec 2002 Location: Canada Posts: 695	A friend had one in a Firebird that he bought new and kept forever. He said the motor was junk and ultimately swapped it to a non overhead cam I6 - a 250 I think and it was in the car until he wore it out totally and sent it to the scrap yard. He is a fellow who has had some "different cars". In addition to the OHC I6 Firebird, he has had a Porsche 914 (you know the non-Porsche, Porsche) and 2 old MB diesels. He has not had really good luck. The Porsche looked pretty good but turned out to be too rusty underneath to justify repair (esp since he couldn't do it himself). The first MB got a bit wrecked when he hit a deer. The most recent MB has had quite a bit of work and doesn't look too bad but still needs more work - expensive when you have to hire it done. __________________ 1968 Chevy - 292 with a powerglide

02-15-2005, 12:02 AM	#7
3 on the tree Registered User Join Date: Oct 2004 Posts: 393	215 horses, 10.25 comp, ratio, price a camshaft before you put any money into it, then you will probably run the other way. Same problem with the Hurricane OHC that Kaiser used in their military pickups-parts availability sucks.

02-15-2005, 12:15 AM	#8
shortymac83 hmm... Join Date: Jan 2004 Location: Culver, Indiana Posts: 1,631	uhh...they're kickass motors? IIRC, the cams go flat on them, and it also has some oiling issues keeping the valvetrain lubed up, but aside from that, they're just as good as the OHV motors. there's a black tempest sprint about 30 minutes south, in rust-free but faded condition. It still has the OHV badges on it. Very cool. __________________ 1983 Oldsmobile Delta 88 1967 Chevy C-10 stripper www.fcrperformance.com - wanna go...faster? talk to FCR.

02-15-2005, 07:07 AM	#9
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,208	Is that a Q-Jet on a stock manifold?! I've heard of the Pontiac 250 mentioned on www.inliners.org but I've never seen one, myself. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

02-15-2005, 01:45 PM	#10
Dano69c10 Senior Member Join Date: Jan 2005 Location: Ontario, Kali Posts: 2,427	You can ship it out to me and I will dispose of it for you... Dano __________________ '69 Fleet It ain't yours, if you didn't build it!



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