Club Cobra - Clevor motor

Club Cobra (http://www.clubcobra.com/forums/)

- Australian Cobra Club (http://www.clubcobra.com/forums/australian-cobra-club/)

- - Clevor motor (http://www.clubcobra.com/forums/australian-cobra-club/107373-clevor-motor.html)

Quote:

The common denominator for 289/302/351W power is the Cleveland head. Your mission determines head selection. For the street, choose the 351C-2V heads with the Street Boss intake. For track use, step up to the 351C-4V heads with the Track Boss single-plane intake.

From one of the links above. Looks like the 351c 2V heads are what I'm after.

Q- Is the 302c 2V heads different to the 351 2V?

Great links Guys keep it coming.

YES...keep us posted on your journey to locate all the parts you will be needing to build this little monster...still not a believer that it would be a good street motor SO....lets see what you can do with it...

Albany, I have some original literature on the B&A StreetBoss/TrackBoss build including spec's and parts. I'll scan it in tomorrow for you.

Not sure what comp ratio you'd end up with, but I'd be looking for a set of 302 clevo heads: 2v ports with quench chamber.
2v 351 heads are usually open chamber - low compression

Cheers

Thanks David that would be great. I was going to go 351 stroked to 408 but will now go 302 stroked to 347. This way I can use the current block in the Cobra.

Quote:

Originally Posted by David Hodgson (Post 1086220)

Not sure what comp ratio you'd end up with, but I'd be looking for a set of 302 clevo heads: 2v ports with quench chamber.
2v 351 heads are usually open chamber - low compression

Cheers

That's interesting.....I thought all the Aussie 351C-2V heads were closed chamber design (what do I know, I'm from America where we had it ALL screwed up)....is it possible that the Aussie 302C was the only Aussie Cleveland with the closed chambers (I realize the Aussie 302C was based on a full size 351C block)?

Cheers from Dugly :cool:

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

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

http://www.clubcobra.com/photopost/d...evor_page1.jpg

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

http://powerheads.com/images/FLOW-TEST-aussie-2V.gif

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

LoBelly

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.

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

Thanks for that, David....answers a lot of questions, for sure!

Cheers from Dugly :cool: