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Discussion Starter · #1 ·
Is it possible to beat a Z06-GT3 with a C3, If so what do we have to do? how much weight is it possible to shed ? Does anyone know how much the body weighs. and how much it can be reduced. The 68 below weighs in at 2800 lbs. A friends similar C3 weighs in at 2700. Engine/Transmission weight is considerably less on the heavier car. The heavier car does have a Tom's 12 bolt and 14" rotors on all 4 corners. Is it possible that the Heavier car has a considerably heavier body?



Thinking about adding a five link rear suspension. Is there any major differences between the Greenwood an Guldstrand style.
 

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Discussion Starter · #11 ·
Crome Bumpers will be ditched. Thinking about dithing most of the body as well. One piece parts are probably a bit ligther. Driver side door is 22 lbs Passengerside 27 lbs can probably weigh 10 lbs or less each.The rear wing is the same on the avatar only at a higher mounting position.



The wing is made for Porsche 911 GT-2, it gives reasonable downforce.

The suspension consists of a complete set from VB&P with bilstein shocks extremes at the rear. Dual mount rear spring, no rear sway bar!

Jeep steering Box.

12Bolt Internals 4,11:1 and 4"Halfshafts

Brakes are Wilwood W6A Radial mount with 14"x1,25" Gt rotors at all four corners. There is also Wilwood setup for the Balancebar and Cluch.

Transmission is Autogear M22X with Tilton Magnesium Bellhousing and TIlton tripple plate 7.25" hydraulic cluch.

358 Engine Consist of Rodeck Aluminum Block 4,130 bore , Bryant crank 3,34 stroke, H-Beam rods, 13,5:1 Je pistons, GM 18 degree 364 heads Ti valves, Comp Special Grind 305 311 [email protected] 0.020 and 0.732 0,692 lift With Jesel 1,85 175 Rockers, Verdi 4 stage drysump and jesel beltdrive. 550 wheel horsepower on Mustang MD 1100 Chassis Dyno, 500 lb/ft on flywheel in engine dyno.

In my last race i was a tad quicker than a 996 GT3 Super Cup on Michelin Slicks. I was on Hoosier P-Metric.

Back to my question about the 5 link, any experienced C3 racers out there?
I can fabricate most parts in my shop.
 

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Discussion Starter · #13 ·
I think most of the Greenwood parts can be made? There was a thread on cf :WTF about this in 2005. It is still there, but I am not sure if it's the real thing though? I do have a 10 point roll cage, but it ends at the centerline of the front suspension (regulations) The cage also crosses in font of the block in stead of a spreader bar. I will do some modifications on the roll cage this winter, to ease entry/exit and increase torsional rigidity and visability. The Engine will be stroked to 415 cid and be EFi'ed.
 

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Discussion Starter · #33 · (Edited)
A lot to be answered here I am overwhelmed. I have studied Marks Impressive work. I am not sure if I dare to modify the frame to a certain extent, but on the other hand I want to go faster... Mark can you send a pm on how to get some detailed drawings of your system, and if anyone has it i would be appreciated to get some details about the Greenvood 5-Link. It's a picture of it on their website. They used it on two of their street Daytonas.

Some of the half shafts are similar looking to the front drive shaft of my 99 Surburban 4x4.

The Rear inside camber is due to a bad day at the office. Somtimes it seems like they are moving the turns around (they are ocationally getting closer/sharper)

I think I read somewhere that the Owings-Corning cars had hand layed light weight bodies, is that a fact? Impessisive Vette you have there redvetracr!
I also studied the FIA historic paperwork on the ZL1 powered 69's. According to the paper the ZL1 cars could weigh in at 1226 kg with (tools and spares)? 2700 lbs with BB??:crazy:

I have raced the corvette since 2002 prior to that i have 20 years of sporty street driving. I bought a 69 BB Camaro back in 81 believe it or not it has never been wrecked.

This car would be dangerous to drive on Northsleife we call it "Ringen" A friend of mine wrecked his 928 GT down there this summer I think he had to pay 8000 Euro for the damage to the guard rail alone in addition to towing, closing down the track for a while, storage of the wreck etc etc...

To solid: I fortunately do not own a well, but I have a Patient Wife and Four kids. A few $ have been spent, and it helps to own a well equipped Machine/Engine shop, with both Engine and Chassis dyno.

I will get some pictures of the engine compartment. The picture belowe is from a car show. Alu Pieces have been replaced with carbonfiber since then

http://www.moldestuket.com/gatebilmessen13.jpg

Note ! did anyne know the body weight and what could be saved ?
 

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Discussion Starter · #38 ·
Turtlevette: I've been in the garage the photos will be ready tomorrow. Note I have the Verdi pump mounted on the right hand side "you probably knew" like the Trans Am Cars. I hade to make a notch in the frame. The pump is made in Sweden, and gives much better crankcase vacum than the rest...

Funny looking Atom by the way!
 

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Discussion Starter · #41 ·
There is a one way safety valve under the filter! opens if you get positive pressure. Luckily it has only happend once. Melted down a piston due to a loose sparkpug.:smack
 

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Discussion Starter · #43 ·
Her are the pics of the engine comp.



Some of the parts are moved toward toward the front right, to even out corner weight. Small tank is breather for transmission.



Trying to mount all accesories as low as possible (cg) Notch in frame can be seen here. Roll cage extension and spreader bar is also visible.



Jeep steeringbox and mastersylinder setup. Bleeder for cluch and temporary brake pressure gage lines



Notch in frame large enough to replace belt .



Tight squeze. If I want to lower the engine further, it has to be moved aft to clear suspension.
 

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Discussion Starter · #48 ·
Yes i rebuilt it myselves. No my mains are not pinned. I have been using thick bearings like the supercharged Caddilacs and Porsches instead of bearing spacers vith my 350 main crank. The box coms from Tom Reina at Corvette Steering. Wery helpful guy!:thumbsup: 1,5 turns from lock to lock isn't it about 12:1? the centerlink is from a 75- Corvette "Beefier". Had problems with flex in the 68 centerlink. I believe The servo pump with integrated reservoir is made by AGI bought at Motorstate.
 

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Discussion Starter · #51 ·
The splitter was remowed vhen I took the photos last night. It does seal up! The hood is somewhat experimental. I will continue working on aero, and try to get som testresults next spring. All we know now is that we can be later on the brakes and there is no front lift at the straights. There is a 3" clearance for the exhaust pipes If the track is slightly bumpy they will hit at 130mph "Have a degree in Aerospace Engineering from KU".
 

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Discussion Starter · #56 ·
A coupple of friends and I went down to the FIA GT season finale at Zolder Belgium. We were lucky to get into the Pit Box of C6 GT3 driven by Antony Kumpen. wery nice package, took lots of pictures of it. He was leading, but unfortunately he broke the front spinde ()I believe. The spec you list is similar to some C3's i know. With the exeption of a modern chassis and aerodynamics. A C3 can weigh 150kg less and have easily 250 hp more. If it hadn't been for the FIA regulations a ANY C3would probably have a snowball's chance in hell against the C6 GT3. It's the David agains Goliat thing I guess. Nothing is impossible, but it might take a while. I think that we are pretty much on the same wave here, and rubbing fenders with one of those would be a life time experience. By the way take the restrictor off a GT1 an you will see more than a 11 sec difference.
 
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