VINTAGE AUTO RACING ASSOCIATION

Phil Mendelovitz · Joined: 13 Nov 2007 Posts: 12

Mark.

Where would we put someone who would come in to race with a production car 2.4 meaning with a 2.4 case, 70mm rods x 84 mm pistons,2.4 head etc or is that not likely to happen?

Phil Mendelovitz

C.Plavan · Joined: 02 Nov 2007 Posts: 28 Location: Fresno, CA

Well said Mark.

Phil- I think you mean a 70.4mm crank
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Thanks,
Chad Plavan
#02 Porsche 911 E CP-GT (2.4L With 60 over)
Documented FIA and IMSA legal through 1972

Mitch Schwartzburg · Joined: 01 Nov 2007 Posts: 44 Location: Mission Viejo, CA

I think I am going to move up in class Very Happy

Here is my newly acquired vintage race car (mid 60's). What class would it go into GT , MOD or ? Confused

Here is some video of it. Just hit the play button.... Laughing

http://video.search.yahoo.com/video/play?vid=1295104760&vw=g&b=0&pos=5&p=tom+slick&fr=yfp-t-312

Mitch
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Mitch
HP #33 Fiat 850 Spider

C.Plavan · Joined: 02 Nov 2007 Posts: 28 Location: Fresno, CA

Mark Scott · Posted: Tue Jan 22, 2008 3:31 pm Post subject: Rule Book

Per the rule Book and the mods that the BOD agreed on (including you)they would be in CP GT. Any Porsche that has larger then 2.0L displacement will be put into to CP-GT.

When we get those cars they can be classified as CP-GT1, or 2. depending if it is a 2.2 with 85X66, or a 2.4 with 87.5x66 or 84x70.4 or 86.7x70.4 or 89x66. Those were all configurations of the 2.2 and 2.4L motors. Pretty simple...
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Mark Scott
#267 Porsche 911 CP-GT

Mitch Schwartzburg · Joined: 01 Nov 2007 Posts: 44 Location: Mission Viejo, CA

I'm just got done having a new under 1 litre motor for my HP Fiat built for the 2008 season. This new engine is basically identical to my existing legal one that I am currently racing, however, I decided to bump up the compression a little (from 10.5:1 to 12:1) Wink

. My engine builders (Italian of course - Fiat afterall) have it mounted on their engine stand and are breaking it in for me. Here's a video of it...... turn up the volume.. Wink

http://youtube.com/watch?v=gSHToyGIxWE

Mitch
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Mitch
HP #33 Fiat 850 Spider

Mark Scott · Posted: Tue Jan 22, 2008 3:41 pm Post subject: HELP

Somebody take his computer away, He has gone crazy Very Happy

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Mark Scott
#267 Porsche 911 CP-GT

Mitch Schwartzburg · Joined: 01 Nov 2007 Posts: 44 Location: Mission Viejo, CA

Daryl DeArman · Joined: 11 Nov 2007 Posts: 53

Mitch Schwartzburg · Joined: 01 Nov 2007 Posts: 44 Location: Mission Viejo, CA

I think I have figured it out Shocked

- instead of trying all kinds of "exotic engine configurations" (based on how everyone has been interpreting the rulebook) $$$.
Everyone should spend more time inside their basic approved engines and eradicate the "parasitic losses" out of it. Wink

Removing these "losses" has proven to increase hidden horsepower.

Mitch
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Mitch
HP #33 Fiat 850 Spider

Daryl DeArman · Joined: 11 Nov 2007 Posts: 53

And what happens Mitch when you minimize these losses inside an "exotic engine combination"?

Mark Scott · Posted: Tue Jan 22, 2008 4:26 pm Post subject: Missing the point

Daryl,

To answer your question. NO... from 1965 to 1969 a Porsche 2.0L motor was 80x66. However the 1969 model did run MFI.. So MFI would be acceptable. Other then that there should not be any issues of a 2.0L coming in with a different stroke. It wasnt until 70/71 when the various bore and strkoe combos arrived. And they had everything form a 2.2 all the way up to a 2.8 (and everything in between). The achieved this by having the option of 2 cranks, 66 or 70.4 with varying piston sizes.

So CP is safe... Hope that helps.
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Mark Scott
#267 Porsche 911 CP-GT

Mitch Schwartzburg · Joined: 01 Nov 2007 Posts: 44 Location: Mission Viejo, CA

Tom Mullaney · Joined: 07 Nov 2007 Posts: 16 Location: Montecito, CA

Hey Phil -

Re: your Jan 21 post: Did Tim Arnett run his Z motored "2.0L" Datsun Roadster in the Laguna Seca SCCA event in fall 2006?

Tom
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Tom Mullaney

1965 Lotus Elan #03 (CP)
1967 Triumph Spitfire (FP)
1969 Lotus Elan (In Escrow - $26,000)

"Bibamus. Moriendum est!"

Ron Carter · Joined: 21 Nov 2007 Posts: 34 Location: Sunny Oceanside CA

Tom, I believe Tim did until he had an off track and bent up the front of the Roadster AKA Zoadster. Since Tim lives close to LS he packed up the Zoadster and brought down his other roadster and raced it that weekend.

Mark,

It was nice to meet you at cars and coffee this last weekend....

I think that there might be something that the BOD is overlooking in regards to the whole CP class thing....Please keep in mind that this has no direct bearing on me, as I do not run an "over-bored" Datsun of any type. I run in D production in my Datsun Roaster and my BRE Z replica remains a 2.4L trailer queen.

Personally I think that all of our cars should be run the way they were back in the day. But I do know that there are a percentage of Datsun racers who would like to get out (at their peril) and race with the Porsche CP-GT guys. Why is that a problem? I think that the BOD would look at this as a good rivalry and less of a class struggle.

As for the "reason" for a plethora oversized Datsun motors, is that the 2.4 blocks, oem rods, pistons and cranks have not been available for close to 35 years now, and they are hard to find in a condition where they can be prepared for race. Datsun Nissan 2.8's have been available new for over 30 years, and may still be. The ease of availability and lower cost associated with a 2.8 is what makes them attractive, along with a little more displacement...

I think this is a situation where there is a friendly rivalry and that is not necessarily bad, as long as it can be managed in a fair manor. It makes sense to me, that if the guys who run a Datsun 2.8 want to race in the GT class, and it is a level playing field that you should consider this as a viable alternative to the CP-M class.

I am interested why the BOD has taken a stand on the 2.8 Datsun motor, and why they won’t allow that in CP-GT, perhaps you can explain that in more detail.

Also... Is there another reason the Porsche guys want to be separated? It seems by your comments that you do not want any other makes to run in the CP-GT class, why is that?

Thanks,

Ron
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67.5 Datsun Roadster
70 240Z BRE Replica
70 510 "B" Sedan (under restoration)