Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

SBC combo???

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Old Jan 11, 2008 | 10:39 PM
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Default SBC combo???

So I am putting together another 350 for my 78' Regal. Tell me what you guys think of this combo.....

350, .030 over 4 bolt block
Performer RPM heads 64cc
KB 10.2:1 forged pistons
RPM intake.
625cfm Demon carb
244/252, .518/.536 112 lobe with a 107 intake centerline (mechanical flat tappet)

TH-350, 3200 stall, 2.2 STR

3.90 gear, full length headers, mandrel bent duals.

weights 3290lbs

let me know what you guys think, any input helps

Justin

Last edited by RegalX; Jan 12, 2008 at 12:54 AM.
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Old Jan 11, 2008 | 10:57 PM
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You might want to use a different set of heads, here are a couple of suggestions:

http://cgi.ebay.com/ebaymotors/AFR-1...QQcmdZViewItem

http://cgi.ebay.com/ebaymotors/Dart-...QQcmdZViewItem

http://www.patriot-performance.com/w...05238&DID=1225

I would also move the LSA of the cam closer to optimum, which will be around 108*. For your vaccum brakes a 110 LSA will probably be as far as you would want to venture. Then depending on which set of heads you use, find the best advancement for the ICL.
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Old Jan 12, 2008 | 12:00 AM
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I already have the heads so that is what I'll be using.....any ideas on the power this thing might make?
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Old Jan 12, 2008 | 03:34 AM
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Have you zero decked the block?
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Old Jan 12, 2008 | 01:46 PM
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no as of now the block is going to be stock deck height, why do you ask?
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Old Jan 12, 2008 | 08:41 PM
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More than likely without zero decking the block your comp is around 9.8-1 at best,i would recommend going with a little smaller cam-high 230's-low 240's
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Old Jan 12, 2008 | 10:17 PM
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Why such a small stall,is this a street car,and what kind of rear?
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Old Jan 12, 2008 | 11:00 PM
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Originally Posted by RegalX
no as of now the block is going to be stock deck height, why do you ask?
Just for figuring your compression ratio accurately. Your quench is going to be off, but they make thinner gaskets to help that out.
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Old Jan 12, 2008 | 11:13 PM
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Well with a regular Fel-pro 1003 head gasket you compression ratio will be approx. 9.77:1. You should be around 446 HP & 473 TQ if everything is ideal according to my Dynomation program. For the money I would deck the block as there are several benefits to doing so. If you get your compression up over 10:1 then I would say that the cam you have would be ok, but if you don't then I would buy a custom grind cam to pull your components together.
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Old Jan 13, 2008 | 03:25 AM
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Originally Posted by 1997bird
Well with a regular Fel-pro 1003 head gasket you compression ratio will be approx. 9.77:1. You should be around 446 HP & 473 TQ if everything is ideal according to my Dynomation program. For the money I would deck the block as there are several benefits to doing so. If you get your compression up over 10:1 then I would say that the cam you have would be ok, but if you don't then I would buy a custom grind cam to pull your components together.
if the block needs to be zero decked I will do it for sure

Thanks for the info

Justin
ModelAMafia
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Old Jan 13, 2008 | 08:27 PM
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Originally Posted by skidmarkSS
Why such a small stall,is this a street car,and what kind of rear?
I didn't think 3200 was that small, yes this is a street car.

The rearend is a 10bolt
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Old Jan 13, 2008 | 10:31 PM
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Originally Posted by RegalX
I didn't think 3200 was that small, yes this is a street car.

The rearend is a 10bolt
I have a 3800 and think its on the smaller side gut it works very well. A Supra buddy has a 4200 for his street car.

When I has my mild LT1 Z I was told to get a 3200 stall. Factory cam and all.

Everyone remember he has the 8.5 10 bolt, not the junk 7.5
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