Winston Cup Engine Specs

[sanborn]

If anyone is interested, listed below are the specs for the WC engine. Most of the info is confirmed, there are a couple of areas where I had to guess somewhat on part of a spec.
Block- Mopar, 9" deck, standard bore spacing,
standard cam location, cross bolt
mains, 18 head bolt, pan rails below
crank centerline, cast iron.
Heads- Mopar, to Nascar specs, IEIEEIEI valve
arrangement, 12 degree valve angle.
Intake- Mopar, 2 different versions approved
Crank- Bryant, 3.25" stroke, 2.25" mains,
1.88" rods, 38 lbs.
Rods- Carillo or Lentz, 6.2" long, .927" pin
Pistons- JE or CP, 4.180" bore
Rings- Dana .042,1.5MM,3MM
Bearings- Clevite, Ford Mains, Honda Rods
Cam- Comp Cams (Bet you can't buy one)
Lifters- .875" dia solids (don't know brand)
Valves- Del West 2.200" Int, 1.650" Ex
Springs- Peterson
Retainers,Locks- Precision Products
Ignition- MSD large dia billet, standard unit
with dual pickups set up for dry
sump only.
Rockers- Jessel 1.7,1.7
Pushrods- CV
Dry Sump Pan- Moroso
Timing Belt- Jessel

Should know more about cylinder heads by end of week.

[RedIntrepid9]

I don't suppose you had the price tag for all those goodies.........

[sanborn]

Don't know for sure, but I understand that tag pushes $60K. That would be $15-18K more than GM and Ford Cup engines. Most of the cost differential is due to development expense being absorbed by a very small quantity of engines. And most of that high cost is confined to the block, heads, intake and a few other unique Mopar parts. The cost will come down as quantity produced goes up. A lot of the generic parts are from outside suppliers and many are "off the shelf" from race component suppliers. For example, the crank is the same unit as the trucks have been using the last several years. The rods are the same as GM and Ford uses. The valves, lifters, pushrods, springs, retainers, locks, bearings, ignition, etc., are all off the shelf. The rockers are probably the same as the GM heads use. Many of these components are interchangeable between GM, Ford and now Mopar engines.

[sanborn]

Don't know for sure, but I understand that tag pushes $60K. That would be $15-18K more than GM and Ford Cup engines. Most of the cost differential is due to development expense being absorbed by a very small quantity of engines. And most of that high cost is confined to the block, heads, intake and a few other unique Mopar parts. The cost will come down as quantity produced goes up. A lot of the generic parts are from outside suppliers and many are "off the shelf" from race component suppliers. For example, the crank is the same unit as the trucks have been using the last several years. The rods are the same as GM and Ford uses. The valves, lifters, pushrods, springs, retainers, locks, bearings, ignition, etc., are all off the shelf. The rockers are probably the same as the GM heads use. Many of these components are interchangeable between GM, Ford and now Mopar engines.

[sanborn]

Sorry for the double post but my 18 year old cat who likes to watch me at the keyboard decided to walk across the keyboard as I hit the submit reply button and my computer went crazy. Oh well, she may know more about it than me.

[sanborn]

On page 53 of the March issue of Mopar Muscle is a picture of a Winston Cup block prototype. It looks like the aluminum sprint car block but of course it's out of iron. Looks like they added two more head bolts (total of 20), all main caps are crossbolt and the lifter bores are moved again. It does have the open water jacket.