Mopar Muscle Association UK

When I built my very 1st V8, a Poncho 400, back when I was a skint teen I just turned the lifter upside down

What pushrods are you using Carl ????????????

Dave wrote:

Carl wrote: lifting the rockers will push the roller closer to the exhaust side.

You sure?

Raising the rocker will mean it has to rotate down more. It rotates in the direction of the inlet side yes?

I might be wrong. You had better check.

Not totally as two ways of looking at it, if the rocker is high it will start on the exhaust side and roll in towards the inlet side, as you say.

My theory is lowering the adjuster side to raise the roller side the roller will start on the inlet side and roll towards the exhaust side. I've only come up with my theory by looking at the mark on the valve stem, the roller is starting in the centre and rolling out towards the exhaust.

Jon Connolly wrote:What pushrods are you using Carl ????????????

Non really as such Jon I have just tried a set of old 273 pushrods as reference point and they are the closest I can get although slightly too long still, I have shortened the adjustable rod but still no difference in the mark left on the stem all that happens is im just winding the adjuster down and not changing the geometry.

Carl wrote:I am using a solid lifter too Pete.

I get that, Carl.

I assume you measured and recorded the clearance with the hydraulic lifter, I would be interested to see the comparison against the solid one when you do it again.....

To do the checking I used and old hydraulic lifter and opened it up and put a load of washers in it and then put it back together now I have a solid lifter for all my PTV and geometry tests.

I think this is a problem with Eddy heads as well as the shaft system, finding compatible rockers for correct geometry.

Yes your probably correct there about the rockers.....as long you got .40 thou left to the edge of the valve which it looks as though you have, your ok.

Les

Les Szabo wrote:Yes your probably correct there about the rockers.....as long you got .40 thou left to the edge of the valve which it looks as though you have, your ok.

Les

Excellent, nice one Les where in business

Most rockers are based on Chevy dimensions and modified to fit Mopars.

That's why I used Hughes Engines rockers. They are designed for mopars from scratch and give you perfect geometry.

Dave wrote:Most rockers are based on Chevy dimensions and modified to fit Mopars.

That's why I used Hughes Engines rockers. They are designed for mopars from scratch and give you perfect geometry.

Very true Daveman
Amazin how many cam & valvetrain manufacturers utilise Chevy pattern components and mod em to suit Mopars.
Hughes are made specifically for Mopar

Ah I didn't know that, I know mopar and Chevy are quite similar I thought they were all engine specific. Perhaps I will invest in a set of Hughes rockers one day, I will see how I get on with the ones I've got first

Cheers

Sure the ones you have will work fine mate.

Most aftermarket cams are ground on Chevy blanks too, Hughes arn't.

Im sure they will, im probably just being over cautious and want to get it right because of what got me in this position in the first place.