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Rat in a C5?

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Old Jan 11, 2007 | 01:28 PM
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Default Rat in a C5?

Has anyone put a big block into a C-5 or know of conversions to do so?
(I've always figured more is better and too much is almost enough)

Scott Schafiroff makes some very interesting stroker combinations .. would be interesting to do a 632 cube supercharged motor - drivetrain setup -very evil grin- .. traction may be a problem.

-Frank
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Old Jan 11, 2007 | 01:52 PM
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You would have to go with the ZL1 version otherwise it would be way to heavy. A fully assembled BB with cast iron heads is going to be around 800 lbs. With aluminum heads you can knock it down to about 730. Then of course there is the amount of room it takes up.
Bill
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Old Jan 11, 2007 | 01:56 PM
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IMO too much fabrication woule be needed to make it fit... then you've got all that extra weight and kill the car's handling.

FYI you can get as large as a 454 right now w/ the proper bore and stroke out of the LSX smallblock.

One forum member (zeeohhhsix, or something similar) just laid down 620 on pump gas NA w/ a 449ci hydraulic motor.

There's also FI like twin turbos if you want over 1000 rwhp.
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Old Jan 11, 2007 | 03:21 PM
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'too much fabrication' -grin-
Thinkin 'panel car' ..looks like a C5 from the outside, all tube frame and aluminum panels on the inside.
I have no idea if the standard A4 and torque tube could be retained with a Rat .. weight distribution would take a hit for sure .. and there would have to be tub work to fit a big enough tire in the back.

Would take some serious thought on what car will be used for .. a fast ET bracket car is what I am aiming at myself .. I enjoy it.

If I were aiming at a road-race or SCCA car, much different approach for sure.

I know 1k+ hp out of the LSX motors is bein done .. I just wonder what the Rat would be like at the same level of build .. I imagine no traction in any forward gear would be standard

-Frank
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Old Jan 11, 2007 | 03:50 PM
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Unless you're talking a max effort drag car, replacing a LS motor with a BBC is going backwards. Sounds like you plan on just using the C5 bod, and building a race car around it. In such a case, it'd be pretty cool.
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Old Jan 11, 2007 | 04:15 PM
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^ Yep... and it's been done... well the tube frame chassis has been done in hardcore drag applications. You're let w/ something that looks like a C5, but really isn't at all!
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Old Jan 11, 2007 | 05:20 PM
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Just drop in an LS7. 427 CI.
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Old Jan 11, 2007 | 05:36 PM
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He's probably looking for something like this:

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Old Jan 11, 2007 | 07:28 PM
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Old Jan 11, 2007 | 07:33 PM
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Originally Posted by Grayeagle
Has anyone put a big block into a C-5 or know of conversions to do so?
Why? Between the weight gain and the reality that with proper camming and headers the LS 427 produces as much power as the BB unless you go out to 500+ cu in, there is little reason to do so. With so much additional weight on the front end the C5 would be a handling pig.

Charlie
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Old Jan 12, 2007 | 01:07 PM
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Why put a Rat in a C-5?

I am curious ..wanted to know if anyone had done it or if there was even a conversion kit out for it.

Same question was asked about puttin a 454 in a Vega, 440 in a Duster,
.. etc.

Big motors in little cars are a bit of fun

Might not be as zippy around the twisties (then again, proper tires - suspension mods - it might do fairly well at that too)..

..but them big rectangle port heads/huge valves really excel at makin hp.

It's *easy* to get 600hp out of a Rat

I wonder what a C-5 with a nicely put together 572 would be like -evil grin- .. not a funny car like the pix posted above .. street machine, weekend racer, fun

-Frank (I may have to do it just to see for myself
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Old Jan 12, 2007 | 01:37 PM
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Originally Posted by Grayeagle
Why put a Rat in a C-5?



It's *easy* to get 600hp out of a Rat



It's also "easy" to get 600 hp from a LS based motor. Not cheap, mind you, but very easy. And the kicker, no costs for "conversion" and you'll still get 25+mpg on pump gas. Unless you LIKE 7 mpg?

Last edited by zeevette; Jan 12, 2007 at 01:40 PM.
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Old Jan 12, 2007 | 02:19 PM
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I think this car has one:

http://prestagephoto.exposuremanager.../dsc_0103-0131
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Old Jan 12, 2007 | 09:31 PM
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If you ever drove a 70 C3 with a 454, there great in a straight line until you try to turn the wheel. Theres a whole write up on why they went away from the heavy big block in a Corvette. The main reason was the affect on handling Drag car ,go for it twisties
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Old Jan 13, 2007 | 06:43 AM
  #15  
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someone did it in 1998 it was in one of the mags. They used the C5 frame.
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Old Jan 13, 2007 | 09:46 AM
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Originally Posted by Grayeagle
Has anyone put a big block into a C-5 or know of conversions to do so?
(I've always figured more is better and too much is almost enough)

Scott Schafiroff makes some very interesting stroker combinations .. would be interesting to do a 632 cube supercharged motor - drivetrain setup -very evil grin- .. traction may be a problem.

-Frank
I thought u were gonna tell us u woke up this morning & found a field rat in your car, Now that would be a funny
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Old Jan 13, 2007 | 11:41 AM
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SHOEHORN and KY JELLY Seriously tube chassised C5 racecar clones are available in any stage from a do it yourself pile of tubes to a complete roller, just drop in your powertrain. SUNCOAST RACECARS out of Florida, and DON DAVIS RACECARS in Arizona are two that come to mind.
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Old Jan 15, 2007 | 03:31 AM
  #18  
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Thx Bubbletop .. bein in Phx I will lookup Don Davis Race Cars an see what they can do for me

Gonna need a roll bar for sure .. soon

-Frank
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