Grey Power !!!

mrs ratbox · Post by **mrs ratbox** » Mon Oct 26, 2009 4:34 pm

35/75 is getting up there if it's a car yor driving around in alot of traffic you prolly don't want any more than 30/70
there was a mob doing dual grind cams for reds (prolly others) think he got it through american autos at homebush, a mate had one in a red 6 in an EK 650 holley

tons of head work mid to high 13 second 1/4's had the idle only a mother could love (and me

) would lite up big rear tyres 1,2,3 and spin into 4th but with the dual grind thing was quite drivable

Thommo · Post by **Thommo** » Mon Oct 26, 2009 4:38 pm

Thats all good advice FB MAD.
Another little we did to my motor, was to place a couple of small washers
behind the relief spring in the oil pump to raise the oil pressure.
A lightened flywheel will also help it pick up revs a little quicker.

Pics and info on my engine can be found on the link below 'My Old School Sedan'

The Video Stewart took at the nats can be seen here

Hop in

Cheers
Jeff

Stygian · Post by **Stygian** » Mon Oct 26, 2009 6:19 pm

Good stuff Jeff and ratbox

Thanks!

Jeff, your FB is awesome

...love the video that Stewart took and totally love the sound of that hot grey screaming in second... I always thought Stew was into original cars, but you seem to have converted him...

You're also tempting me to ditch the planned Weber / Repco combination for the triple Stromberg / Speco set up I have sitting on the shelf...

Final question. Red motor valves. I notice with the specs of Jeff's beast that he runs 179 valves with relieved chambers. I have been told that the biggest size you can go without relieving are 161 valves. Is this right or are all red motor valves the same size?

Thanks for your patience but this stuff is gold for me...

parisian62 · Post by **parisian62** » Tue Oct 27, 2009 6:38 am

Hey Andrew,

I fell in love with hot greys when I went to my first nats at Bathurst and I saw the Crupis wagons. Jeffs FB is awesome.

Old Timer is getting a good dose of period hot up equipment...speco triples, headers and finned rocker cover, cam, bigger valves and port and polish and whatever else my wallet can throw at it...

Stewart

Stygian · Post by **Stygian** » Tue Oct 27, 2009 8:41 am

The Crupis wagons were something...I remember those from the 2001 Taree Nationals...they had a rather trick progressive accelerator linkage on their triple setups if I remember rightly...

Good to hear Old Timer is getting the hot grey treatment...one day Old Timer and Edna can both fly past El Presidente on a club run when he has broken down yet again in one of his factory originals...

Cheers mate, Andrew

Thommo · Post by **Thommo** » Tue Oct 27, 2009 6:26 pm

Edna Blueflash wrote: You're also tempting me to ditch the planned Weber / Repco combination for the triple Stromberg / Speco set up I have sitting on the shelf...

Final question. Red motor valves. I notice with the specs of Jeff's beast that he runs 179 valves with relieved chambers. I have been told that the biggest size you can go without relieving are 161 valves. Is this right or are all red motor valves the same size?

Thanks for your patience but this stuff is gold for me...

Is that Weber or Weber's? on a Repco Cross Flow Head?

Click here for more info on that set up.

I'm no technical expert on greys, but when my motor was built, the intake
valves were turned down in diameter just a little to fit.
They are listed on the spec sheet as 'Red Valves', sorry I cant be any more specific.

BTW I think I may have converted Stewart

Thanks for the nice comments on my car too

Cheers
Jeff

parisian62 · Post by **parisian62** » Tue Oct 27, 2009 7:08 pm

BTW I think I may have converted Stewart

...I think so too Jeff

Stygian · Post by **Stygian** » Tue Oct 27, 2009 7:44 pm

Hi Jeff,

I'm planning on putting on the prototype Repco Highpower manifold for the standard grey head that I asked you and others about in the makeover of Edna...it came with a single two barrel downdraught Weber...

Thanks for the link to the scanned story about the crossflow FJ... incidentally, I phoned the gentleman who is making the repo crossflow heads and told him about my prototype manifold...he got a bit excited about it, so I sent him an email with photos and the story behind it...never heard back...

BTW I think I may have converted Stewart

I KNEW it!

Thommo · Post by **Thommo** » Tue Oct 27, 2009 8:02 pm

Ah ha, the Repco manifold, thats right,
Sorry I got a little excited there

Here's a combo for ya

Stock balanced bottom end,
Lightened flywheel
Shaved head with mild porting,
Triple strommies with progressive linkages,
Recurved electronicly converted dizzy,
Steel timing gear,
30/70 cam
Extractors

I reckon thats a good formula

Stygian · Post by **Stygian** » Wed Oct 28, 2009 5:42 am

I reckon thats a good formula

Based on Stewart's video, who could disagree?

Sorry for hijacking your thread Dave Mac... I hope that you have found the replies to my posts as informative and helpful as I have...

FB MAD · Post by **FB MAD** » Wed Oct 28, 2009 7:27 am

Progressive opening linkages on tripples is a very good idea as has been said.It helps stop fuel overload/flat spot when the engine is at the lower rpm speeds and allows the other two carbs opened up when the engine is ready to take the extra fuel.

Can provide a smoother/quicker reving engine and in theory could give some economy when only running on the single carb at lower engine speeds.

Ideally the extra two carbs should be well open at the throttle position point when the engine is "coming on cam ".

A dyno is the best place to find the point where the engine needs all the carbs working at once and to find at which engine speed that it is producing it's best power output.

Stygian · Post by **Stygian** » Wed Oct 28, 2009 2:27 pm

Thanks FBMAD.

Hmmm, dyno tuning is expensive, but I agree. It's probably a necessity with a progressive linkage setup. By the way, where do you get the bits to make the linkages?

Thommo · Post by **Thommo** » Wed Oct 28, 2009 3:43 pm

FB MAD wrote:Progressive opening linkages on tripples is a very good idea as has been said.It helps stop fuel overload/flat spot when the engine is at the lower rpm speeds and allows the other two carbs opened up when the engine is ready to take the extra fuel.

I had the venture restrictors recomended to me to fix that.
There is no flat spot in mine at all.

Cheers
Jeff

FB MAD · Post by **FB MAD** » Wed Oct 28, 2009 6:30 pm

Where did you get your venturi restrictors from Thommo??

All I can find out is that one of the Holley carb models has a venturi that nearly fits the grey carby but can't find out which one??.

EKjimmy · Post by **EKjimmy** » Wed Oct 28, 2009 6:59 pm

Thommo- what does raising the oil pressure do? is this in a red motor? just curious
Jimmy