How much can it take? - Team Camaro Tech
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post #1 of 16 (permalink) Old Jan 5th, 06, 09:41 PM Thread Starter
 
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Question How much can it take?

How much horsepower will a 2 bolt 327 take before it gives?? Any ideas?
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post #2 of 16 (permalink) Old Jan 5th, 06, 10:01 PM
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Wes
 
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Re: How much can it take?

What did you have in mind?
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post #3 of 16 (permalink) Old Jan 5th, 06, 10:05 PM
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Brad
 
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Re: How much can it take?

Do you have a Z28? How many miles is your engine at?

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post #4 of 16 (permalink) Old Jan 5th, 06, 11:53 PM Thread Starter
 
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Re: How much can it take?

I do not have a Z. Wish I did but I love my car just the same. The motor is the 327 block with the 283 crank setup. I am dropping in a different cam and I just had my heads ported and polished. I think I will be near the 400-450 range. Though I won't know for sure until I can get to the dyno this coming spring. Here's my setup:

327, World Torquer (sp) heads with 2.02-1.60 valves, 76cc, Comp Cams 286H, Flat top pistons, 650 Edelbrock AVS, Edelbrock Air Gap RPM intake, 1 5/8 Hedman headers, 3" flowmaster system, THM 350 w/ 3500 stall, stage 4 shift kit and 3.73 posi out back.
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post #5 of 16 (permalink) Old Jan 6th, 06, 12:16 AM
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Re: How much can it take?

There are too many variables to predict when the motor will blow. Metal analysis requires destroying components to know their yeild points. Imperfections in the metal (which all metals have) will make some weaker than others. How well balanced the motor is, how many inperfections are in the piston castings, bearing wear, and many other things come into play. I haven't seen any 2 bolt mains break, but I've seen cranks break and more often than not, the piston or rod gives out. It's a crap shoot. Best you can do is build it as solid as you can (afford) and treat it accordingly. But that's part of the fun. Build it, thrash it, and fix it.

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #6 of 16 (permalink) Old Jan 6th, 06, 11:51 AM
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Wes
 
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Re: How much can it take?

I've seen many chevy SB's hold in a lot more power than what you're discussing. Go for it.
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post #7 of 16 (permalink) Old Jan 6th, 06, 02:09 PM
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Re: How much can it take?

Itll hold.. just remember RPMs and detonation kill motors the quickest..

Mark
Long Gone: 1984 Z28, 1989 RS
Current : 1967 Coupe w/350, 2010 2SS

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post #8 of 16 (permalink) Old Jan 6th, 06, 03:08 PM
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Re: How much can it take?

You dont have enough compression ratio to run a 286 cam. A flat top 327 with 76cc heads is only about 8.5to1.

67 Plum Mist Met. 408 TH350 3.08 posi
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post #9 of 16 (permalink) Old Jan 6th, 06, 07:09 PM Thread Starter
 
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Re: How much can it take?

I'm upgrading my pistons to .125 domes. That should give me about 9.5 to 1.
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post #10 of 16 (permalink) Old Jan 6th, 06, 09:39 PM
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Re: How much can it take?

What kind of rods are you running? If you are turning some serious rpms, 6500-7000 or more when you wind it up, I would suggest some eagle H beams.

1967 Camaro SS: 406 sbc, 522hp/514 ft lbs, Doug's 1 3/4" headers, M20, posi, 3.73's, vintage air gen IV, IROC steering box, Comp Eng. weld-in sfc's & traction bars, chrome US Mags

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post #11 of 16 (permalink) Old Jan 6th, 06, 09:50 PM
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Re: How much can it take?

I have read in the past that a properly well built 2-bolt SB will go safely up into the 500hp area.
If it's a large journal 327cid why not just stroke it?
Argh! Argh! Argh! Argh!

Kurt

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post #12 of 16 (permalink) Old Jan 7th, 06, 01:42 AM Thread Starter
 
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Re: How much can it take?

I am putting in some Eagle I Beam rods. I was looking for a 302 crank but their pretty spendy? What else could I use?
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post #13 of 16 (permalink) Old Jan 7th, 06, 04:22 AM
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Re: How much can it take?

weren't there some pretty common 283's in the early 60's that had steel cranks in them? truck engines, perhaps?
that would be a step in the right direction.
if nothing else, ask pdq67 about his little 301 combo with a Duntov cam.. i can guarantee he'll be more than happy to comment on it.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #14 of 16 (permalink) Old Jan 7th, 06, 11:05 AM Thread Starter
 
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Re: How much can it take?

I think it would be easy to find a 283 crank but those are all small journal type. My block is a 68 which is the large journal. Any other suggestions?
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post #15 of 16 (permalink) Old Jan 7th, 06, 11:17 AM
 
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Re: How much can it take?

Your home made 302 should do just fine with the 2 bolt mains. As long as you keep the RPM's around 6000 to 6500. The old original 327 365 & 375 HP engines ran a long time running up to 7000. Your cam and good heads should make you pleanty of HP under 7000.

Dollar Beil
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