[RAIV-Z]

Originally Posted by Tom Vaught

Ideal situation would have been to trim the lifter bosses before the whole assy went together. Would have to install cam bearings in the block and install the camshaft that would be used and measure the tie bar clearance at every position. Then if necessary put the .080" clearance milling in the block bosses. Not Rocket Science.

Tom Vaught

Let’s all be grateful this wasn’t a rocket.

Let’s all be grateful this wasn’t a rocket.

I agree, BES should have done that. On a side note, if these heads are still being made, you might want to double check your intake pushrod tube location.

[67'7F6'Bird]

Originally Posted by RAIV-Z

The cam has been changed, the rocker bar clearance does look tight on a #1 and #3 which are the only 2 which have been installed with the new cam. The block has some marks indicating clearance issues which I don’t believe happened while the new cam was being degreed using test springs.

But were you using a 3/4 inch drive to turn the motor over or a 1/2 inch drive when you were degreeing the Cam in? We all know how forceful you can be.

[RAIV-Z]

Originally Posted by cgeise

Call Crower - you want a raised seat lifter with pin oiler and offset if you need them - they now have the bushing style also -

Were any lifter or additional block modification required to run these?

[LiL Jack]

I had to grind my IA block the first go around so the bars would not hit.
I would rather grind a little on the block then the tie bar.

[RAIV-Z]

Originally Posted by LiL Jack

I had to grind my IA block the first go around so the bars would not hit.
I would rather grind a little on the block then the tie bar.

I agree with you Jack, grinding the lifter tie bars is not the right way to fix this. Where there were obvious clearance issues when the engine was initially built, not sure why it wasn't done right the first time...

The current lifters are Crower 66260:
Full Body Mechanical Roller Lifters (.842" dia. / .750" Bearing) V8 (Pontiac/Oldsmobile) Pontiac 1955-Up 326-455ci, Oldsmobile 1964-1984 260-455ci (Set of 16) Full Body Mechanical Roller Lifters

Looks like these will be ending up in the spare parts drawer. I think I'm going to need a bigger drawer.

[johnta1]

Haven't you tore this engine down again?

Why didn't you grind the block this time, especially since you knew this was a problem?

[RAIV-Z]

Originally Posted by johnta1

Haven't you tore this engine down again?

Why didn't you grind the block this time, especially since you knew this was a problem?

Yes, the McCarty/BES Racing Crate Engine after only 2 N/A dyno sessions which were performed by BES was torn down after I received it.

I have no excuse for not having the 2nd machine shop fix an issue that would have been a non-issue if either the first shop addressed the problem or simply used another lifter like a Crower 66294. These roller lifters feature a special alloy body, a lightweight design, and a heavy-duty blade that has been moved up to fit late model blocks.

[cgeise]

Originally Posted by RAIV-Z

Were any lifter or additional block modification required to run these?

it is a .903 lifter - but it clears everything

[RAIV-Z]

Originally Posted by cgeise

it is a .903 lifter - but it clears everything

Did you perform the oil hole to oil band scribe line mod?

[cgeise]

The lifters are made by Crower for pressure pin oiling - We have bushings in the block with a .030 oil hole and get PLENTY of oil up top

[RAIV-Z]

Crower Enduramax lifters (66294E) arrived today, just as Curt said no block clearance issues with these. I will need a slightly longer "0.050" pushrods, they should arrive tomorrow. The original pushrods were 9.750 long.

[cgeise]

And thats not even the raised seat unit

[67'7F6'Bird]

Originally Posted by RAIV-Z

Crower Enduramax lifters (66294E) arrived today, just as Curt said no block clearance issues with these. I will need a slightly longer "0.050" pushrods, they should arrive tomorrow. The original pushrods were 9.750 long.

Was BES looking to see the effects of gasket material going through the Oil Filter Housing.

[PonchoV8]

On the oil slotted mains, didn't I read a couple yrs ago that Dude does that mod? Anyone else remember that?

[cgeise]

these are the raised seat style

[RAIV-Z]

Originally Posted by cgeise

these are the raised seat style

I believe Crower calls those Hi-Seat.

I ended up with the SEVERE-DUTY CUTAWAY ROLLER LIFTERS Crower’s Severe-Duty
Cut-Away style rollers feature a superior, billet alloy body, lightweight design and a heavy-duty blade, raised to fit late model blocks.

[cgeise]

I believe you can get the hi-seat in severe duty also- just have to talk to the right guy -- good luck the hi-seat is nice for a shorter pushrod ---

[RAIV-Z]

Just about ready to run it on the dyno NA to break it in again...

[jdw_poncho]

I must be living life wrong. You have a pool right at the door of your garage? Holy smokes!

Id never get anything done if I had that staring at me every day. LOL

Good luck, see you at Norwalk.

[David Holmberg]

Originally Posted by RAIV-Z

Just about ready to run it on the dyno NA to break it in again...

Looks good!