[242177P]

Originally Posted by ponjohn

Here ya go 350 bucks on facebook marketplace.

Includes cam and timing gear set that won't be used.

Gonna need a BIG hammer.

Ford ------> .875
Pontiac --> .842

[68hotbird]

I got my ls7 lifters today and they will not work. The oil hole is to high and comes out the top of the bore with a mild lift cam. Going to talk to comp and see if they can grind the pontiac cam on a smaller base circle to allow use of these lifters. Realize this could be an option if your ordering a custom grind cam anyway. Still looking at other possible cost effective lifters to evaluate. The ls7 oil band location is ok they have moved the oil hole up and put a notch out of the oil band to get oil to the hole. Hope this info helps I will keep updating as I research and test more.

[hurryinhoosier62]

Originally Posted by 242177P

Gonna need a BIG hammer.

Ford ------> .875
Pontiac --> .842

.033 can be reamed, then honed out of the lifter bosses.

[hurryinhoosier62]

Originally Posted by t money

I wonder if this is what MrPBody was working on back in 2013. He has not posted on any forums for a long time. Hope he well.

Jim Lehart is doing OK. I forgot all about this.

[Jack Gifford]

Originally Posted by tom s

... if the factory lifters will hold up to a performance cam and spring pressures...

As for the SBF roller lifters- I chose them as a starting point because I like the generous roller width and rugged body support of the axle. I've had no problem with them in the hemi V8, even with its heavy valvetrain and 625 lb. spring loads.

[Formulajones]

Originally Posted by hurryinhoosier62

.033 can be reamed, then honed out of the lifter bosses.

That's where I'm going to start to lose interest. As more things have to be modified the costs start to go up and the difference between this and a retrofit lifter starts to come closer together.

Plus you're modifying the block beyond no return which makes it useless for stock stuff, and it's not something most here would want to convert over if it requires now taking the block to a machinist just because a guy wants a roller cam.

I'd only be interested in this type of deal if a drop in lifter can be found to be used.

[Formulajones]

Originally Posted by ponjohn

Here ya go 350 bucks on facebook marketplace.

Includes cam and timing gear set that won't be used.

I posted earlier I've bought brand new dog bones, spider, and roller lifters from Ford Racing for just $175. So that price seems a bit high, even if it were new.

[hurryinhoosier62]

Originally Posted by Formulajones

That's where I'm going to start to lose interest. As more things have to be modified the costs start to go up and the difference between this and a retrofit lifter starts to come closer together.

Plus you're modifying the block beyond no return which makes it useless for stock stuff, and it's not something most here would want to convert over if it requires now taking the block to a machinist just because a guy wants a roller cam.

I'd only be interested in this type of deal if a drop in lifter can be found to be used.

What is the difference between reaming lifter bores to install bronze bushings to correct lifter geometry or reaming then honing a lifter bore to install larger diameter lifters? In my opinion there is none. IF someone wanted to return to the OE diameter lifters it would be a simple case of installing bronze lifter bushings to return the bore back to standard size.,

[tom s]

Simple yes,just numbers in a check book!Not small numbers.Tom

[hurryinhoosier62]

Originally Posted by tom s

Simple yes,just numbers in a check book!Not small numbers.Tom

Agreed, Tom....for most folks. I have access to a Bridgeport mill.

[Scarebird]

Originally Posted by Formulajones

That's where I'm going to start to lose interest. As more things have to be modified the costs start to go up and the difference between this and a retrofit lifter starts to come closer together...

Kinda hard to do with a assembled motor in the car also.

[Formulajones]

Originally Posted by hurryinhoosier62

What is the difference between reaming lifter bores to install bronze bushings to correct lifter geometry or reaming then honing a lifter bore to install larger diameter lifters? In my opinion there is none. IF someone wanted to return to the OE diameter lifters it would be a simple case of installing bronze lifter bushings to return the bore back to standard size.,

The difference is that now you're talking about stripping a block, pulling the engine, and getting machine work done for anyone that wants to swap over to a roller cam that can normally be done in an afternoon. That's a huge turn off.

That's not even taking into account the added expenses.

[Formulajones]

Originally Posted by Scarebird

Kinda hard to do with a assembled motor in the car also.

Yep

[JC455]

https://www.summitracing.com/parts/cca-31-1000/

Spider and dog bones from Summit Racing.

[goatwgn]

How about Pontiac 2.5 Iron Duke roller lifters?? I think I heard Mr. P Body talking about using those at one time? I am pretty sure they are the right diameter. I am not sure if the oil band height is correct though.

[242177P]

Originally Posted by goatwgn

How about Pontiac 2.5 Iron Duke roller lifters?? I think I heard Mr. P Body talking about using those at one time? I am pretty sure they are the right diameter. I am not sure if the oil band height is correct though.

If the pic on Summit's site is right, it looks like an LS type lifter?
Notch above oil band is feed hole, post #42 says it's too high.

[Scarebird]

It is, I have a spare HT2148B. This seems to be the go to lifter for corporate motors since the SBC went roller in 87. To me of equal concern is the the main barrel of the body also pops out of the bore - this would wreak havoc on the dogbone!

I tested this with a Summit 2801 cam (yes, it is a flat tappet but I figure the base circle and max lift would be the same).

[ponjohn]

ANY way at all to grind the slot as Paul Carter has done with an assembled shortblock?

[JC455]

I was thinking about roller lifters last night, and had a thought... Harley V-Twins have had hydraulic roller lifters in them forever.
Anyone have a spare H-D lifter to measure?

["QUICK-SILVER"]

Originally Posted by 68hotbird

This concept is stolen from a longtime Pontiac friend of mine who has several of these setups running with thousands of miles street and track.

What parts did the friend use?

Clay