A group of us has started an auto performance club and we already have our first project. We were donated a GM small block 307 V8 engine to tinker with, study, and eventually do a complete rebuild. I was hoping that i could gather as much information on the engine as I can. Any help will be greatly appreciated!!!
What's the question?It is basically a 283 with a 327 crank.They were never produced with a forged crank but they have a medium journal and 2 bolt mains.Only had 2 bbl. carbs.Highest hp rating I believe was 200 hp.I have taken apart 2 and both had FT pistons,1 was a 1968 and the other was 1973.Do you have any idea what year the engine it is,just curious.I've had a couple and liked them.
Anything can be built. :mwink: I think these guys are just wanting details for research material.If you were given an engine to play with and it's in good shape,by all means have fun :thumbup:
Of the various CSB's smaller than a 327, I like the DZ 302 first and the 307 second. I think they would be a great smallbore for a mild street machine, especialy if gas goes through the roof again. I dont like 305's.
What rig are you puting it in? There are a LOT of factory GM heads floating around thesedays that would really wake up a 307. ANY Vortecs, 305 ho heads. They are a dime a dozen and would work great on a 307. A little porting, mild cam. Fun project!
Just remember that smaller CID motors are hyper-sensitive to over caming and over carbing. Best to err on the milder side in those aspects.
Dont tthrow them 307 blocks away !!!! I use to work at a machine shop and I found out that a 307 block has extremely thick cylinder walls, I think they are the same casting a 350 , but not sure.
But I have bored several of the 307 blocks out to make a standard bore 350.
You can take advantage of all the standard bore 350 stuff laying around with a 307 block
If the block can just be honed out and reringed then it would be a good project. If the crank, mains, or bore is worn then just chuck it and get a 350.
If you can just put in a rering kit then its a good start. That with some 416 heads, and a "Z28" manifold is a cheap combo that can hit 350hp with relative ease and LOW cost. After you get it all buttoned together (which will cost about $700 ifi you watch your P's and Q's) run it in a car for a while then sell it to finance your next project.
Of the various CSB's smaller than a 327, I like the DZ 302 first and the 307 second. I think they would be a great smallbore for a mild street machine, especialy if gas goes through the roof again. I dont like 305's.
What rig are you puting it in? There are a LOT of factory GM heads floating around thesedays that would really wake up a 307. ANY Vortecs, 305 ho heads. They are a dime a dozen and would work great on a 307. A little porting, mild cam. Fun project!
Just remember that smaller CID motors are hyper-sensitive to over caming and over carbing. Best to err on the milder side in those aspects.
I agree :thumbup: I suggested using vortec heads on an earlier 307 thread but they ignored it. I still think that it would really wake it up.Although the intake is cost prohibitive.
This is the first question that must be answered, since these are completely different motors with absolutely nothing in common. The Olds 307 will have an oil fill tube on a small shelf above the water pump. The valve covers will have five bolts. The Chevy 307 will have the oil fill in the valve cover, and those valve covers will have four bolts.
A group of us has started an auto performance club and we already have our first project. We were donated a GM small block 307 V8 engine to tinker with, study, and eventually do a complete rebuild. I was hoping that i could gather as much information on the engine as I can. Any help will be greatly appreciated!!!
Anything can be built. :mwink: I think these guys are just wanting details for research material.If you were given an engine to play with and it's in good shape,by all means have fun :thumbup:
yeah exactly we were given an engine and a teacher is sponsoring us and he said he would help us get this project/club off the ground.
what im looking for is...i need info on the engine, a couple of us were asked to do research on it and googling it didnt really help me. its a GM small block 307
This is the first question that must be answered, since these are completely different motors with absolutely nothing in common. The Olds 307 will have an oil fill tube on a small shelf above the water pump. The valve covers will have five bolts. The Chevy 307 will have the oil fill in the valve cover, and those valve covers will have four bolts.
Dont tthrow them 307 blocks away !!!! I use to work at a machine shop and I found out that a 307 block has extremely thick cylinder walls, I think they are the same casting a 350 , but not sure.
But I have bored several of the 307 blocks out to make a standard bore 350.
You can take advantage of all the standard bore 350 stuff laying around with a 307 block
This would work for a 305 too wouldn't it? 305 bore is only 1/4" away from a 350, that's 1/8" off the entire circumference of each cylinder. Should be enough meat there for that id think.
yeah exactly we were given an engine and a teacher is sponsoring us and he said he would help us get this project/club off the ground.
what im looking for is...i need info on the engine, a couple of us were asked to do research on it and googling it didnt really help me. its a GM small block 307
Get the cast series of #s behind the drivers side head on top of the flange where the transmission bolts up and go to Mortec.com and you will find dates and years for all small block chevys.Also under the valve covers will be a series of cast #s,they will be at Mortecs' website also.
I wasn't implying an original. That thing isn't worth that. There are quite a few cheap knock off's though. another option is a Torker. They're by no means a GREAT manifold, but they are a moderately sized single plane that you can pick up for less tahn $50 used. Your idle quality will be a little rough but it'll get the job done for cheap, and I think cheap is a key word on this build.
I wasn't implying an original. That thing isn't worth that. There are quite a few cheap knock off's though. another option is a Torker. They're by no means a GREAT manifold, but they are a moderately sized single plane that you can pick up for less tahn $50 used. Your idle quality will be a little rough but it'll get the job done for cheap, and I think cheap is a key word on this build.
Get the cast series of #s behind the drivers side head on top of the flange where the transmission bolts up and go to Mortec.com and you will find dates and years for all small block chevys.Also under the valve covers will be a series of cast #s,they will be at Mortecs' website also.
alright that helps a bunch, we are trying to do this build with a minimal budget of.......nothin. ill look at th engine tomorow and get pics of it on here and check out the cast #s
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