Topic: mad max coupe

[kghost]

Some if not most of the boss 302s had 4 bolt mains.

If I recall 69-70 were the only years for the true boss 4 bolter

[trueblue]

Australian Cleveland heads used a combination of the closed (high compression) combustion chamber of U.S. 4-barrel Cleveland/Boss heads, with port and valve sizes of U.S. 2-barrel Cleveland heads.

The Australian 351 Clevo came with 2 different head options, one was the 2V which was pretty plain jane the other was the 4V was found on the GTHO and some others I think (I'm not that versed on the cars but I do know a little about the engines ).  The 4V has ports which you could lose a small cat in and valves to match.

[dave500]

the v stands for venturi,,some guys here still think 4v heads had four valves?

[Bailgang]

Australian Cleveland heads used a combination of the closed (high compression) combustion chamber of U.S. 4-barrel Cleveland/Boss heads, with port and valve sizes of U.S. 2-barrel Cleveland heads.

That actually sounds like a good combination to me because one of the issues with the Boss 302 was that it's 4 barrel head ports were almost too big for that size engine for street use, they would pull pretty hard once you got them wound up put were lame TQ wise at lower rpm's because of the huge ports. The 2 barrel heads as lame as they may be compared to the 4 barrel heads were still decent with plenty of potential and throw in the closed combustion chambers to bump up compression and that sounds like a decent cyl head. I'm used to Pontiac heads which aside from a rare RA4 or ultra rare RA5 heads are just plain lame even when fully ported. It's too bad that Clevo 302 was never sold here.

[trueblue]

the v stands for venturi,,some guys here still think 4v heads had four valves?

Yeah I've had a few guys say that to me

[kghost]

Well there was a SOHC 427......

All the true boss 302's were Windsor inspired blocks ( thicker walls an deck w 4 bolt mains) with Cleveland heads.

Oddly the Windsor were named after the Windsor Ontario Canada plant.

The clevelands after the Ohio USA plant.

The Windsor, Cleveland and FE series all ran concurrent and the Windsor is still made as a crate motor......

[KRONUS0100]

the blower coming on by itself is accomplished with an A/C clutch via a switch in driver cockpit. the blower pulley is machined to fit it.  the blower input shaft is machined to fit the backside of the A/C clutch.  very common mod here in the states.  incidentally the wieand 6-71 and 8-71 blowers are commonly available off old detroit diessel v6 and v8s.  just need to swap the actual intake plenum itself.

[Bailgang]

the blower coming on by itself is accomplished with an A/C clutch via a switch in driver cockpit. the blower pulley is machined to fit it.  the blower input shaft is machined to fit the backside of the A/C clutch.  very common mod here in the states.

 You did know the supercharger set up on the movie car was fake didn't you?

[Don R]

Maybe not so common. I've never seen one and I'm an (old) car nut. Been rodding and racing almost forever.

[Bailgang]

Maybe not so common. I've never seen one and I'm an (old) car nut. Been rodding and racing almost forever.

Yeah the A/C clutch thing had me going hmmm as well. It can take anywhere from 50 to 100 hp or more depending on its size and how overdriven the belts are to drive an old school roots type supercharger and I just don't see an average A/C clutch that's designed to handle maybe 10 hp draw from an A/C compressor being able to cope with it, that A/C clutch would have to be massive. Years ago I met Gary Dyer of Dyers Blower Service and got to take a tour of his shop and I didn't see any superchargers that had any sort of clutch drive. I'm not saying it can't be done it's just that I've yet to see one on that type of supercharger.