327 crank in a 400 - Team Camaro Tech
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post #1 of 12 (permalink) Old Dec 25th, 00, 01:24 PM Thread Starter
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What would be the result of putting a 327 crank in a 400 motor. Has anyone tried this?
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post #2 of 12 (permalink) Old Dec 25th, 00, 03:12 PM
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June 1997 Hot Rod built an engine like this. With .030 O/S bore it was a 352 C.I
They used Ford L6 rods and 11:1 custom pistons. bottom line was 435 Ft-Lb's at 3800 RPM and 412 H.P at 5700 RPM.
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post #3 of 12 (permalink) Old Dec 25th, 00, 03:27 PM
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According to the article it's a sweet motor. Runs on "cat pee" gas and makes lot's of grunt with no trace of detonation. I called the shop that did the motor and asked about swapping in a bigger cam and heads with larger valves - the goal of course being a motor with the same characteristics but even more power. They seemed fairly clueless about the possibilities and I haven't had time to pursue it any further. Personally, I think it's a great combo with lots more potential.

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Scott
'69 400SB, Richmond 5-speed; '99 HD Road King Classic
www.geocities.com/sdenning1
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post #4 of 12 (permalink) Old Dec 25th, 00, 06:18 PM
 
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Right on, Rocky,

Its a small block, like an old 348 big block. One of the engines people have overlooked.

I would use the new cheap 6" Elgin rods or even 6.125" or longer ones. Bore it .060" over and come up with a 357+.

An excellent high revving engine that should behave just like a Z-engine on steroids if the heads and cam are picked right so that it can breathe.

Use a medium journal crank and bearing spacers along with correct pistons and have at it. IMHO pdq67



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post #5 of 12 (permalink) Old Dec 26th, 00, 12:53 PM
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If I remember right, the 352 in the Hot Rod also had AFR 305 heads and a Comp Hydraulic Roller with 215 @.050 and .525 lift. I think they used the 305 heads so they could use a partially dished piston and still get the 11:1 compression. Man, I spent a few months in Physics class dreaming about building one with a larger cam and some 195 AFR's and screaming it to about 7 grand and tearing up the streets. I think PDQ67 and I have similar theories about building motors: Big bore, small stroke, long rods, big heads, small cam and dual plane intakes. I now have a 400 to go along with the 327 crank I've been saving, but I think I'm gonna build a 406 for more low end. Ooops, went off the subject a bit, sorry. As compared to a 355, I think the 352 would TEAR it up!!! Flatter and wider torque curve, better Bore/stroke and rod/stroke ratios, quicker revs, and very usuable power. I don't think you could go wrong. Go get 'em.
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post #6 of 12 (permalink) Old Dec 26th, 00, 01:28 PM
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I've got a 400 SB in my '69 that I'm currently rebuilding. Turns out my "rebuilt rods" were apparently rebuilt in Mexico (or a shop worthy of being south of the border - thank you very much Speed-O-Motive) and were way out of spec - the crank sucked as well. Anyway, I spun a bearing and now it's rebuild time with a reputable local machine shop.

This time around I'm going with AFR 195 heads, a CC hydraulic roller in the 230/236 duration range, and flat tops for 10.5 - 1 compression. It should give me around 500 HP/lb.ft. of torque.

The very long rod motor is still tempting because of the resistance to detonation and ability to live happily on el-crappo gas. I would think that if you took the basic 352 and added AFR 195 heads with 2.02/1.60 valves (adjusting the chamber size to keep the compression up there) and a healthy roller cam you would easily pump the power numbers up to the high 400 range. Maybe next time.....

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Scott
'69 400SB, Richmond 5-speed; '99 HD Road King Classic
www.geocities.com/sdenning1
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post #7 of 12 (permalink) Old Dec 26th, 00, 02:45 PM
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I'm not saying this wouldn't be a good engine, but the result would be a slower car. Compared to a 400 built the same.

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67 Camaro 410sb 11.63 @117.6
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post #8 of 12 (permalink) Old Dec 27th, 00, 03:18 PM
 
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Lonnie,
We realize there are more powerful engines out there but this combo has a touch of the rpm potential of the little Z engine and the power of a bigger one. Gear it right, and it will give the big boys fits, just like the little Z did in its heyday.

And if built "tight", should be pretty detonation free with a high CR., thats all.

I would try to put as small a combustion chamber as I can find on it to take advantage of this. IMHO.

And if it's fun quotient isn't high enough, then, it's "more power Scotty, or #1!!! A bb is just a boneyard away. He, He!!! pdq67



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post #9 of 12 (permalink) Old Dec 27th, 00, 07:02 PM
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My mind only thinks in 1/4 mile blocks. He asked about the result and I told him. I like all SBC's. If he wants something different, or is restricted to cubes for some kind of racing, then I say build it. If he wants to go as fast/quick as he can on the same budget, keep the 400 crank in it.

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67 Camaro 410sb 11.63 @117.6
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post #10 of 12 (permalink) Old Dec 27th, 00, 07:09 PM
 
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Right on, Lonnie. pdq67



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post #11 of 12 (permalink) Old Dec 28th, 00, 05:00 PM Thread Starter
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I just thinking of building something different. Something out of the ordinary.
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post #12 of 12 (permalink) Old Dec 28th, 00, 05:25 PM
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I'm with Lonnie67. There is no replacement for displacement.....

GO BIG OR STAY HOME!

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TONY
67 CAMARO R/S CLONE, 355/turbo 350, 200hp NOS,12 bolt,etc...
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