All Small Six Roller cam conversion?

[aussie7mains]

Its a big expensive job, save the cost and spend on the cylinder head, thats where the power is. The guys with roller cams are generally the guys who have breathing restrictions, and so, must use as much cam duration as possible, hence they move to rollers, mind you if you hear one of thses engines, they rev like buggery, but run like turds under about 4500rpm. A better breathing cylinder head will give the power without resorting to huge duration cams. Just think of engines like the BMW 24v six, it has 220bhp from 180ci at 6500rpm. Yet it idles like a shopping trolley.

 

[drag-200stang]

So, bringing this thread up since it has more traction.
I e-mailed Tighe and Crow cams in Australia.

Tighe will still make a Roller cam for 680 Australia. = $ 422.38 United States Dollars plus shipping.
Bronze gear $95 - AUD ( If available)
Material used "We make these billet cams from iron. Induction hardened then Tuftrided after completion".
He mentioned we can user Ford 460 roller lifters. I asked Barry for a port number and he said he would be back to me if available.

Crow no longer makes roller cams for the inline six.

Are you sure that he understood that you were talking about a pre cross flow?
If the cam is iron, I would think that a stock iron dist. gear would work, maybe not.

 

[Jmustang_65]

Are you sure that he understood that you were talking about a pre cross flow?
If the cam is iron, I would think that a stock iron dist. gear would work, maybe not.

Yes, I asked for a Pre-crossflow 200/250 Roller cam.
On the website in state he can grind any grind from Holden 6's also.

E-mail response below but I can see were the confusion can be since Aussie named these engine almost the same. I have e-mailed him again to confirm.

"Yes, we still make roller cams for 250 Ford. We do not have kits for them, but we may still have a bronze gear.

New camshaft price $680

Bronze gear $95 ( If available).

Regards

Barry"

 

[Jmustang_65]

Are you sure that he understood that you were talking about a pre cross flow?
If the cam is iron, I would think that a stock iron dist. gear would work, maybe not.

Just responded again with the answer below. @CNC-Dude

Sorry for the redundant questions. Just want to confirm.
These are Roller cams for the 2v Ford 250 Non-Crossflow? Correct?

"Yes, we make our own billets and grind them to any configuration required.

We are doing a pre crossflow at the moment for a customer.

Regards

Barry"

 

[CNC-Dude]

Are you thinking we can drill and tap the center of dog bone into the block to hold the lifter so that we can use standard 302 roller lifters? if the distance was the same? or just cut in have/extend?
View attachment 24762

I was trying to source a busted block to further investigate this several years back, but yes, possible repurposing the 5.0 dogbone or making new ones from 4340 or similar material. Now that this has popped back up if anyone in the N. Ga area has a block they'd like to contribute for the cause.....

 

[drag-200stang]

In a post pmuller said the the 300 the lifters are 2.125 ctc and I measured 2.100 on a 200 the best I could, so in practicality the New forked 300 roller lifter should work if one can get the link over to the other side and hooked up, it may not go, it will have to be tried to know, there is more room in the 250 than a 200. Of course 300 are oil through style and would work for the yella terra rockers and something could be done for the stock non oil through rockers I am sure.

 

[Jmustang_65]

In a post pmuller said the the 300 the lifters are 2.125 ctc and I measured 2.100 on a 200 the best I could, so in practicality the New forked 300 roller lifter should work if one can get the link over to the other side and hooked up, it may not go, it will have to be tried to know, there is more room in the 250 than a 200. Of course 300 are oil through style and would work for the yella terra rockers and something could be done for the stock non oil through rockers I am sure.

I see well that's some good news. The concern that was brought up was cylinder 1 and 6. Do you think it's do-able with removable link bar lifters on these?

 

[comet6]

It looks like you could spin the link bar around and have a right and left version to accommodate cylinder 1 and cylinder 6. Someone with those lifters needs to demonstrate that. If so I think it could work.

 

[pmuller9]

It looks like you could spin the link bar around and have a right and left version to accommodate cylinder 1 and cylinder 6. Someone with those lifters needs to demonstrate that. If so I think it could work.

Yes you can flip the link bar so it can be inserted from either the left or the right side of the lifter.

The "Morel" insignia will be upside down on the flipped tie bars. Not a good look. LOL

 

[drag-200stang]

I see well that's some good news. The concern that was brought up was cylinder 1 and 6. Do you think it's do-able with removable link bar lifters on these?

The forked link bar lifter is still connected to one lifter, but you can separate the other lifter from the pair, that is what is needed on the small six. But the issue is not so much as 1 and six, the issue is the same on all, is to get the link across the water jacket bump out between each pair of lifters and connected. The water jacket is connected at the top of block and is solid for about 1-5/16'' down and then there is a about a .400'' gap wide by 1-5/8'' tall to get the connected link across and connected. There is more room to work with on a 250. Someone will have to try it at each cylinder to know for sure. Having the cam out so the lifter can drop down more should help.

 

[CNC-Dude]

Are the roller cam blanks still going to need connecting rod clearance notches in them or is the cam barrel small enough of a diameter to not be necessary...?

 

[drag-200stang]

I would think so, If the barrel could safely be made small enough, I would think that Ford and after mkt. cams would be made without them to save costs. I have seen some small six cams fully machined and the the barrel was less than OEM casting and still had notches ground in.

 

[alwill923]

I have my 200 on a stand ready to put together. What Morel lifters will fit? I could get a pair and try it in my block. I know I will require one lifter to be a slip on. Will the tie bar be long enough or to long?

I wonder if a lifter manufacturer could/would make a lifter with a special tie bar ??

Looks like it is getting expensive!

 

[pmuller9]

I have my 200 on a stand ready to put together. What Morel lifters will fit? I could get a pair and try it in my block. I know I will require one lifter to be a slip on. Will the tie bar be long enough or to long?

I wonder if a lifter manufacturer could/would make a lifter with a special tie bar ??

Looks like it is getting expensive!

The Morel Hydraulic Roller lifters are being sold by Straub Technologies.
Talk with Chris Straub. 423-391-7774.
They are designed for the Ford 300 six which has a lifter center to center of 2.125"
The tie bar also works with the Chevy/GMC and Jeep inline sixes roller lifters.

Here is the link to the Morel hydraulic lifters being fitted in the 300 six.

https://fordsix.com/threads/installing-hydraulic-roller-lifters-in-a-240-300-block.86793/post-711734

 

[pmuller9]

250 block with tie bar roller lifters.

 

[drag-200stang]

That is a 250 with the about 1.5 taller deck than the 200. I would never remove that much material /strength from the block at least not on a high power effort. There is less abusive ways to do it.
The South Americans use the slotted lifters and pin in the side, they have been racing the small six for a long time. They know how to use a hole saw too.
Just my opinion.