carreracup21

M758 , I can think of a couple of instances where they do allow essentially a 10 % reduction to move up one class. You can run a 73 Carrera 2.7 at 2116 in D as a lt-wgt, or in E at 2365 as a touring ( 10.5 % change). Also you can run a RSA at 3031 in E, or at 2760 in D ( 9 % change ). No other prepared changes are allowed except you can pull out the ac on the RSA in D. Still have to keep the interior which unfortunately makes it hard to switch back and forth between the 944 spec in NASA and Stock PCA 944.

Oddjob

This is much of the reason that I am against the no update/backdate proposal. I think you should be able to have the choice of running a Progressed C2 in D or to convert your C2 into an RSA for D. Why not? Same with updating a 95 993 engine to the later 282bhp output. Why not? Turning an F Class 88 944 Turbo into an E Class 88 Turbo S.

Sure, keep the guys from turning 914s into GT3s and turning 993s into 73 RSs...., but allow some common sense flexibility with the update/backdate rule.

Take the time to send your input into John, Donna, and Lance on this.

Oddjob

No, if you progress your 924S to H, it has to maintain its stock weight of 2734. If you want to run at the 944 Rothman's weight, your car has to be a Rothmans car, or be completely converted into identical specs (at least until they adopt the proposed rule change which would eliminate the conversion option).

sprbxr

Speaking of interior. In a stock class, how much interior has to be stock? Stock door panels, carpet, rear seats? Can I use an RS carpet kit and door panels and remain in Stock class? What about the center console?

sprbxr

BTW, the proposed change that will affect me is the weight increase from 3000lbs to 3240lbs for my C2T in D stock. I will be putting it on the scales for the first time next week. I bet I am way under the new weight.

Jeff Curtis

Yup, I agree, I know of AT LEAST one C2 owner that may get surprised by the scruts in two weeks.

It WON'T be me!

On the same note, is there an "authorized" and mainly "UN-authorized" location to add ballast?? I have about 35lbs to add with the new Fikses and no airbag steering wheel.

Someone said just harness in a brake rotor or two in the passenger seat, that sounds ok but if there's no limits on where to place ballast, it's going elsewhere!

I don't recall the rules stating where ballast could or could NOT be added??

Oddjob

I believe it states that it has to be in the passenger compartment and securely bolted down.

So you cant put it in the trunk of the 911.... But you can leave your spare tire in as ballast.

I would NOT harness anything steel or lead in, even if it was legal. Imagine getting hit in the head with a brake rotor or 10lb block of lead during a roll over?

M758

NASA Rules state strict requirements for ballast.

It must be mounted to the pass side floor not farther back then the most forward part of the seat mounting. Each 10 lbs of weight must be secured with a 3/8" grade 5 bolt with large washers backing it up.

So 35lbs of balast need 4 bolts. 28 lbs needs 3 bolts. To meet weight for 944-spec (2600 with driver) I keep my stock passegners seat (30lbs) and run 30 lbs of bar bell weights (3 10lbs units). These are bolted to the floor using 3 bolts.

PCA I don't believe has the same rules for securing ballast.

John H

My 60 lb ballast consists of weights for barbells and is bolted through the center through the passenger side floorboard. The bolt is huge and has large, thick washers (backing plates almost) on both ends. I did this because I did not want 60 lbs flying around inside the car if I hit something. Passed the scruts with flying colors.

Jeff Curtis

FWIW, I read the PCA rulebook (2004) and couldn't find one mention of ballast, just the weight requirements for each model.

I asked a few people at the track this weekend and all three were GT class competitors, so they couldn't offer any advice.

I only need about 20lbs, maybe even less after putting my AC compressor back on and my windownet assembly, camera, etc. - gained about 20lbs through that!

I'm thinking of using divebelt weights and strapping them in, I'm not interested in drilling through my floorboard for weights, although I have for my substrap some time ago.

We're going to weigh the car in "race trim" later this afternoon, if I get a chance, hopefully I only have to add 10-15lbs. I find it hard to believe that I've added a CAGE and all the required safety gear...and the car still doesn't weigh what it's supposed to!

I'm off to send an email to the National Scrutinizer...I'm certain that will answer my questions...I'll post here to share.

Oddjob

Look in the Stock Class section under item 6. Body/Chasis/Interior part D. Seats..... ballast in passenger compartment securely bolted to the chasis....

Manny Alban

Remember to weigh the car at the track. The scales they use for the race are the 'official' scales. I'm sure you know all of this because of racing with NASA, but you'd be surprised how many times the scruts hear "but it made weight on the scales in the shop". I know my car had a 25lb discrepancy between Watkins and Texas (Texas it was 1lb over weight...guess it must've lost water weight because of the heat).

Mark in Baltimore

Jeff,

At Watkins Glen I strapped in two rotors in the passenger's footwell after I discovered I was under weight for practice. The clanking and thunking noises those things made was extremely distracting.

swftiii

Mark - excuses, excuses...

JCP911S

I ballast my car with fuel. 7 lbs per gallon... this placed it over the front wheels.

Mark in B... if your ballast is clunking around, you may want to secure it more firmly... in a 20 g impact, 35 lbs "weighs" 700 lbs