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Old 04-01-2019, 04:17 PM
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MadMike MadMike is offline
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Location: Dawsonville Georgia
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Default Chevy Engine block strategy

If I understand the GCR correctly, it appears the "350" engine is legal in AS with a weight penalty. Is this accurate?

It appears you can build a 305 - using either the LG4 or LB9 blocks.
I assume you can build a 302 - using the 4.00" bore/3.00 stroke crank (which I couldn't see on the spec sheet as being listed, but it falls within spec)
Or you can build a 350 - using a common 4.00" bore block and one of the listed 3.48" stroke crankshafts.

My car currently has a worn out 305 (LG4 based) engine.
I have not weighed it yet. It is a 1989 Camaro. Last run in 2006.

It also appears if I have an engine under 313 cubic inches, either a "305" or the above mentioned "302" (assuming this is legal to make) - I must weigh 3280#.

If I go with an engine over 313 I must weigh 3580.

Spare blocks I have available are a 1974 4.00" bore, and I have a 1991 LB9 (TPI 305). I also have several LO5 blocks (4.00" bore, 1 piece rear main seal).

What should my strategy be?
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Old 04-02-2019, 06:41 AM
PamRichardson PamRichardson is offline
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Default Questions

MadMike --

You've asked a LOT of good questions, but, may be looking at an older ruleset. I recommend downloading the current GCR.

I'd be happy to talk with you and provide individual answers to your questions if you like. Send me a private message with your phone number and a good day and time to call and I'd be glad to call.

Look forward to seeing you at the track! Pam Richardson
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Old 04-02-2019, 09:57 AM
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MadMike MadMike is offline
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Thanks for the reply, I will PM you later when I get a chance.

Thinking out loud:
I downloaded the current GCR off the SCCA website and it's coming off as the 2009 GCR.

My hard copy of the GCR is from 2008.

After a couple hours searching here, I came across this very discussion in the rules section dated from 2007

http://www.asedan.net/forums/showthr...ghlight=566607

I am thinking/posting not only for myself, but possibly for the other potential folks who might wish to come and race AS, but won't ask or aren't aware of this class even being a viable option. Apparently this is an area that's also been addressed here & there over the years.

I stumbled across a retired/parked AS car after I was trying to build a CMC car for NASA. I also attended a major race there where I was checking into running CMC and the well placed fellow told me they were trying to push everyone from CMC into AI. Then I bought the legal AS car, so I'm back. And it'll cross over to AI. And further, you (SCCA) have a huge potential CMC audience to reach out to. IMO.
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Old 04-02-2019, 10:32 AM
PamRichardson PamRichardson is offline
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Default Current GCR

MadMike --

Try this link and download the April Updated GCR for 2019.

Good luck, Pam

https://www.scca.com/pages/cars-and-rules
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Old 04-02-2019, 10:33 AM
jimwheeler jimwheeler is offline
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Andy Schneidemeyer runs an iron head 305 at 3100# in Midiv. He also ran the Runoffs the last two years. The April 2019 GCR is available to down load. Go the SCCA - Programs - Road Racing and click on the Rules on the right side under Road Racing Home. You will see 2019 General Comp. Rules. click on April updated.
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Old 04-02-2019, 11:34 AM
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MadMike MadMike is offline
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I got the 2019 GCR, thanks.
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Old 04-02-2019, 11:52 AM
jimwheeler jimwheeler is offline
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If you need any help deciphering the rules, just ask.
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Old 04-27-2019, 11:11 PM
kbsmith1 kbsmith1 is offline
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I run a 312 ci chevy. Bore 4.030 using a 350 block. Stroke 3.050 with a custom callies crank. 6" manley rods. And custom JE pistons to make the
total deck height come out right.

This goes into a full prep 1993 firebird.

If I were doing it over, and I wanted to build an AS car,
I'd start with an LS1 1998-2002 camaro or firebird, and build a
limited prep car.
__________________
Kevin Smith
1993 Firebird AS #03 Oregon Region SCCA & ICSCC
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Old 04-30-2019, 11:50 AM
smithpr smithpr is offline
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I run 3.917 bore and a 3.2 crank with a 5.850 rod.

Using an old Bow Tie narrow bore block.

Just like the factory designed it.

Last edited by smithpr; 04-30-2019 at 12:36 PM.
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