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Title: Grey motor Post by: weddo on February 21, 2007, 01:03:41 AM Hi all,
I had the chance at the weekend to puy my new grey motor on the dyno. It was the only old school vehicle amongst all the jap / turbo boys. My old motor in comparison was putting out 49.5 HP at 4200 revs and 125 Kph. The new motor even though it was running very rich, pulled 100 Hp at 160Kph and a tad under 7000 revs, and what a great sound ;D. The young boys couldn,t get over it because it put some of their cars to shame ??? There was one older guy there ( local mechanic) and he said it made his day. I'm still smilin :) weddo Title: Re: Grey motor Post by: Sheriff on February 21, 2007, 02:03:14 AM Good stuff. Weddo. You'd better let us know now the specs of your new grey motor. Just what have you done to it to make 100hp. Cheers, Mike.
Title: Re: Grey motor Post by: Rusty_T on February 21, 2007, 02:11:40 AM :o :o :o
Yep weddo, Some specs and photos please. Cheers Rusty : Title: Re: Grey motor Post by: weddo on February 21, 2007, 05:10:06 AM Engine specs,
Crank ground 40thou, probably not ideal, but the best we had, bearings to suit, and bearing bridges. Bored 40thou, polished rods, JP ? step top pistons (brand new, bought at a garage sale a few years ago for $50.00) machined to suit, Mazda rings 10:1 compression Head- late model commodore valves with turned down stems, 308 valve springs and caps, hardened seats, chambers reshaped, opened ports and port matched to suit extractors and Lynx manifold. Crow cam 63 -30 grind, flywheel lightened, engine fully balanced. SU high 38 carbies and manifold altered to 4 bolt connection. Engine builder was John Brookfield who built Brock’s early motors and is a head building wiz. This was the last motor he built before he retired at the end of last year. I will post some photo's as soon as I figure out how to upload them. cheers weddo Title: Re: Grey motor Post by: weddo on February 22, 2007, 04:06:45 AM Here are some pics I hope it works
(http://i165.photobucket.com/albums/u65/weddo_album/fc034.jpg) (http://i165.photobucket.com/albums/u65/weddo_album/fc032-1.jpg) (http://i165.photobucket.com/albums/u65/weddo_album/fc029.jpg) (http://i165.photobucket.com/albums/u65/weddo_album/fc038.jpg) (http://i165.photobucket.com/albums/u65/weddo_album/fc023.jpg) (http://i165.photobucket.com/albums/u65/weddo_album/fc043.jpg) regards weddo Title: Re: Grey motor Post by: FC_fer_me on February 22, 2007, 06:58:48 AM That's a mean looking head for a grey motor. Wish I had a workshop like yours, how do you keep it so clean? Well enough dreaming, back to work. Cheers, Dave ;D
Title: Re: Grey motor Post by: Ed on February 23, 2007, 05:09:31 AM you gotta love a good head job eh fellas?
nice work Weddo. some serious grey power mumbo there mate. Cheers Ed Title: Re: Grey motor Post by: Hewart on February 23, 2007, 06:28:26 AM Great looking grey motor...!!
Gotta say I love the tools on the bench too in those old wooden boxxes!! Sweet!! Cheers Les... Title: Re: Grey motor Post by: TAYZ on February 23, 2007, 06:48:30 AM I would certainly love to go for a ride in that FC!!!! I bet its got a great note to it
tayz Title: Re: Grey motor Post by: fastjbav6 on February 27, 2007, 12:34:29 PM Did you modify the firewall to fit the tripple su's?
Regards Seb Title: Re: Grey motor Post by: weddo on March 01, 2007, 02:10:32 AM Fc_fer_me I gota admit that was not my workshop, mine isn't so clean, and there is usually a car of some sort on my hoist all the time.
Taz it has a great note like all good grey motors should, especially when the cam drops in and the sound gets deeper. Fastjbav6 I was fortunate (or not so fortunate) I had to removed a heater from the fire wall which left a 4 inch dia hole that I put a backing plate behind and that was enough to clear the air filter. The high 38mm Su's, being a vertical carby don't have the clearance problems a standard SU with side fuel bowl has, so all I will have to do when I next take the motor out, to detail the engine bay, will be to weld a plate in the hole and just massage the fire wall a little. regards weddo |