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RSFreak The other "John"
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Joined: 23 Jan 2004 Posts: 2946 Location: Renton
1989 Chevrolet Camaro RS
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Posted: Mon Sep 22, 2008 5:54 am Post subject: All small blocks look the same... |
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Hey, remember that 350 I picked up for $300 a few weeks ago? Well, TJ and I ran the casting numbers and found out that its actually a 307!!! Worst f'ing small block ever! I am hella pissed! But on a positive note, we discovered that the 350 that was in the T/A is a four bolt main block and should be usable after re-honing. So thats the new plan. Now I need some good heads... ![Wink](images/smiles/icon_wink.gif) _________________ '86 Trans Am - 5.0L TPI - LT1 cam - 700R4 - WS6
'85 Camaro Berlinetta - IROC clone
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Alphius Peanut
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Joined: 05 Sep 2006 Posts: 2429 Location: Grand Mound
1984 Chevrolet Camaro Z/28
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Posted: Mon Sep 22, 2008 6:13 am Post subject: |
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Ouch!
Those blocks are the low nickel soft metal ones right?
Wear out easy? Not to mention the lack of displacement being a major problem
I also seem to remember something about the bore-to-stroke ratio being undesirable for power too...
At least you got a good core to build with still! |
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Quasi-Traction "I have petals"
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Joined: 24 Oct 2005 Posts: 3873 Location: stumptown
1986 Chevrolet Camaro Berlinetta
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Posted: Mon Sep 22, 2008 11:27 am Post subject: Re: All small blocks look the same... |
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RSFreak wrote: | Well, TJ and I ran the casting numbers and found out that its actually a 307!!! Worst f'ing small block ever! |
nonsense. I would argue the 267 is the worst small block ever made. Destroked 305 anyone??
You at least get a the Large Journal 327 crank with a 307, and the heads are like 64 or 66cc heads (small chambers). If I were you I'd take your 350 Block and use the 307 crank and make a killer 327 out of it. _________________
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blue89 Member
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Joined: 23 May 2006 Posts: 3482 Location: Bellingham/Eugene
1986 Chevrolet Camaro RS
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Posted: Mon Sep 22, 2008 11:47 am Post subject: |
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How could the 327 be better than a 350 with the same heads? |
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turbo_jimi Member
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Joined: 23 Feb 2004 Posts: 1206 Location: Tacoma
1985 Chevrolet Camaro Z/28
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Posted: Mon Sep 22, 2008 12:51 pm Post subject: Re: All small blocks look the same... |
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Quasi-Traction wrote: | RSFreak wrote: | Well, TJ and I ran the casting numbers and found out that its actually a 307!!! Worst f'ing small block ever! |
nonsense. I would argue the 267 is the worst small block ever made. Destroked 305 anyone??
You at least get a the Large Journal 327 crank with a 307, and the heads are like 64 or 66cc heads (small chambers). If I were you I'd take your 350 Block and use the 307 crank and make a killer 327 out of it. |
I see a Franken-engine in the works...350 block, 305 heads (the rebuilt ones that came with the TA) and a 307 crank. ![Twisted Evil](images/smiles/icon_twisted.gif) _________________
1985 Z28 Crate 350, Hurst T-5, 3.23s, Flowmaster Under previous set-up: 143.82 rwhp 216.98 lbs. torque @4390 rpms 3/12/11 |
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badbob66 Member
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Joined: 27 Mar 2005 Posts: 134 Location: Damascus, Oregon
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Posted: Mon Sep 22, 2008 2:36 pm Post subject: |
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I had a 70 chevy pickup, I knew it was not the original motor since it had center bolt valve covers, so I ran the block numbers, found out it was a 305 out of a 89 camaro.
2 years after selling it the guy I sold it to was selling it on craigslist, he put on his add that it had a 350 in it.
I can't tell 1 from the other either.
I'M sure somebody know's all the things to look for to tell them apart.
Bob _________________ 1986 trans am
1985 Honda fl350 Odyssey(No it's not a MINI VAN)
1985 honda 250R ATC |
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RSFreak The other "John"
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Joined: 23 Jan 2004 Posts: 2946 Location: Renton
1989 Chevrolet Camaro RS
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Posted: Mon Sep 22, 2008 7:25 pm Post subject: |
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The 305 heads actually have bigger intake valves despite the 307 having a larger bore. Might just put the 305 heads on it and keep it around for future install into the RS. I've read about people making power with 307s, but its alot of work. ![Sad](images/smiles/icon_sad.gif) |
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Quasi-Traction "I have petals"
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Joined: 24 Oct 2005 Posts: 3873 Location: stumptown
1986 Chevrolet Camaro Berlinetta
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Posted: Tue Sep 23, 2008 5:03 am Post subject: |
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blue89 wrote: | How could the 327 be better than a 350 with the same heads? |
I don't know about "better" but I assumed he just had a bare 4 bolt block with a 4" bore (the "350" block). Thus it made sense to use the crank out of the 307 and sell the rest.
Brandon is making the same power with a CCC on a 327, as a couple other crewbies are making with their modified L98's. _________________
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RSFreak The other "John"
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Joined: 23 Jan 2004 Posts: 2946 Location: Renton
1989 Chevrolet Camaro RS
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Posted: Tue Sep 23, 2008 4:03 pm Post subject: |
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Quasi-Traction wrote: |
I don't know about "better" but I assumed he just had a bare 4 bolt block with a 4" bore (the "350" block). Thus it made sense to use the crank out of the 307 and sell the rest.
Brandon is making the same power with a CCC on a 327, as a couple other crewbies are making with their modified L98's. |
Sorry for the confusion, the 350 is a complete short block. ![Wink](images/smiles/icon_wink.gif) |
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wanarunhard Member
Joined: 11 May 2006 Posts: 125 Location: ellensburg wa
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Posted: Wed Sep 24, 2008 10:00 pm Post subject: 307 |
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307 made a lotta torque good for low end power i haj one in a chevelle it was a burnout monster pretty good feul economy motor too |
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chevymad Master B
Joined: 11 Jan 2004 Posts: 5474
1987 Pontiac Formula
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Posted: Wed Sep 24, 2008 10:32 pm Post subject: |
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Gotta remember that a couple 305s have made the same power as the L98's as well. The main thing I like about a 327 is its hp per mpg. It seems to create hp more efficiently then the larger motors. As others always say though, more cubes = more ultimate power.
As for the 307, I personally think its a better combo then the 305. It has a larger bore so the valves are less shrouded, yet same cubes. They really got a bad rap because gm never made a performance version of them. All 307s got small valve heads, 2 barrel intakes, yesterdays version of the peanut cam, and single exhaust. So hp was very limited, which had nothing to do with the actual configuration of the short block.
For an economy 5.0 engine, I think a 307 with a set of 416 305heads.. and a small cam like a comp 256/262 or voodoo equivalent, headers, and 4 barrel would outperform a similar 305 setup. |
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GREG DAVIDSON Member
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Joined: 15 Mar 2008 Posts: 1159 Location: Salem
1989 Pontiac Formula
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Posted: Wed Sep 24, 2008 10:38 pm Post subject: |
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i've alway thought bout building a 327 for my firebird as kinda a trib to the ol style corvette my moms bf has a 66 stingray with that set up and its a torque monster and fast as hell yea its all fiberglass and ways less but i still think it would be cool to do |
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RSFreak The other "John"
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Joined: 23 Jan 2004 Posts: 2946 Location: Renton
1989 Chevrolet Camaro RS
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Posted: Thu Sep 25, 2008 6:43 am Post subject: Re: 307 |
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wanarunhard wrote: | 307 made a lotta torque good for low end power i haj one in a chevelle it was a burnout monster pretty good feul economy motor too |
This motor is gonna have TPI induction, so it will already have gobs of low end torque. |
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