Clevor motor

[David Hodgson]

Hey Dugly,

It's been a long time since I played with these so I'm a bit rusty, I was refering to local terminoligy for open and closed. I don't proffess to be an expert at all, but as I recall even Aussie chambers were different to US.

Early 4V Clevo's here were imported from US and were used in our GT Falcons and were US closed chamber. Aussie cast 351 2v were fitted with either 2bbl or 4 bbl manifold and carby. These had what we call open chamber but were I believe, not as 'open' as US.
Aussie 302 only had 2V head but also 2 or 4bbl carbie. All late models only had 4 bbl option with 2v heads. These heads have the smallest of all closed chamber heads, almost like a Windsor quench. These used the Carter Thermoquad.
Like I prefaced, 'I'm no expert and a bit rusty' so I am open to any correction.

Cheers

[LoBelly]

Ok ...

Had some hassle trying to upload the files earlier but now have images of a four page article on a 302 clevor build in my gallery

This is medium size image and the full size images (4 of) can be got in my gallery



I also found the pages on head flow numbers as provided by various sources at different times:

http://fordmustangcar.com/repair-and...head-flow-data

the pages list various cleveland/windsor head flow rates.

Interesting to note that the GT40 '60's original heads and the much later GT40Ps flow very similarly to the 2V Clevo heads - Aussie/Non-Aussie 2V heads appear to have practically the same flow
(removing the incentive to do a street boss for most I imagine)

Quick lift from the pages - Taking .500 lift as an example:

Head Casting I/E Valve
Size Lift 0.500 Port Configuration

GT40 (60s Orig) I 1.90 195.4 NOS Stock Ports
GT40 (60s Orig) E 1.60 151.8 NOS Stock Ports

GT-40P Cast Iron I 1.84 196.0 Stock
GT-40P Cast Iron E 1.46 139.0 Stock

Aussie Cleveland 2V I 2.19 198.0 Stock
Aussie Cleveland 2V E 1.71 162.0 Stock


The numbers tend to vary over time and with the source (like dynos) but they're all pretty close.
It is worth noting what a bit of porting will do to the 2v Clevo heads

from www.powerheads.com



Anyway - that's about all I have to offer on the subject other than - good luck.

LoBelly

[David Hodgson]

Albany, PM sent.

I will try to upload the articles I have. One is the same as Lobelly's but the clarity may not be as good.

[David Hodgson]

Found this info on chamber sizes for US and Aus heads. Seems Aus 351 2V had 2 sizes of open chamber. Later heads have the smaller chamber.

http://phystutor.tripod.com/stang/en...cleveland.html