Lash caps after cam mod

[DesertRat]

If you look at Mr Albans pics he's doing the Can Swap correctly.

He's has the Cam Specs, he's using a Degree Wheel and Dial Indicator.

If you have never used this type of measuring equipment before and have change a Camshaft its a Roll-of-the-Dice when you have issues such as discussed here.

 

[Valaas]

Hi desertRat,
I have used a company which entire business is camshafts. They even manufacture bespoke camshafts. Their camshaft/mods sits in almost every car in the National Street Car series. Several Pro rally drivers, brand dealers and other automotive professionals use them. They are anything but cheap, but they follow their customer to a satisfactory result no matter what. They know cams. That's why I am not too worried.
As per their instructions my next step is to measure "exchange height(?)" at TDC using my dial gauge, after assembly (still waiting for the pistons to arrive).
No roll-of-the-dice, but I am just an engineer without professional mechanic skills, so that considered I guess anything is.

 

[Valaas]

I guess my concern is that a lash cap is a 1950 style thing. The lash caps will gradually wear a groove into the end of the valve stem, but it may not be an issue for you as you probably aren't going to do big mileage. If the cam is a regrind, then they must have done some serious stuff on it to lose that amount from the base circle. Is your bucket ok, in the picture it looks like pieces are breaking out of the inside???

Well, the caps certainly adds another piece to the transfer of force, so it is not ideal. But I guess I can inspect caps and stems at each valve adjustment.
The buckets are all identical and seems solid to me. They all have a "bump" of extra (wear?) material in the bottom centre, which is clearly visible at my picture. Besides that all surfaces are smooth and even without any visible sign of cracks or wear.

 

[Neville Lush]

I'm looking inside the bucket in the picture, it looks like there's some cracking inside. I'm only on my phone, so maybe it's my eyes.

 

[Valaas]

I'm looking inside the bucket in the picture, it looks like there's some cracking inside. I'm only on my phone, so maybe it's my eyes.

Ah. I think I see what you mean. There are smears of MoS/engine oil mix after very generous lubing of all buckets

 

[Neville Lush]

Are you using stock valve springs?

 

[Valaas]

Are you using stock valve springs?

Yes, I plan to keep revlimit 6k. The turbo delivers max boost at 3,5k

 

[Kevin frazier]

Valaas could you snap a picture of cam lobe in a measuring device showing numbers. 8.8mm lift you referenced earlier not really helpful. If you could show the measurement that Neville asked for it might be helpful. I have 3 different sets of Neville's cams all different lifts. What did the cam maker say should be settings for these cams. Did you get a card? If you did can you post it. Did they say what lobe centers should be. Are you just dropping in and using stock tdc.

 

[DesertRat]

Hi desertRat,
I have used a company which entire business is camshafts. They even manufacture bespoke camshafts. Their camshaft/mods sits in almost every car in the National Street Car series. Several Pro rally drivers, brand dealers and other automotive professionals use them. They are anything but cheap, but they follow their customer to a satisfactory result no matter what. They know cams. That's why I am not too worried.
As per their instructions my next step is to measure "exchange height(?)" at TDC using my dial gauge, after assembly (still waiting for the pistons to arrive).
No roll-of-the-dice, but I am just an engineer without professional mechanic skills, so that considered I guess anything is.

We're all trying to help, but without answering our questions and telling us what the Cam Profile/Cam Spec is is like trying to finish a JIgsaw puzzle without all the pieces.

Most of the Guys here who have asked specific questions due to the fact that;

1) Its either a required Engine Building protocol and or;
2) They've seen these issues before and know how to narrow find the solution.

If I'd venture a guess its either one, or a combination of;

1) Worn Valvetrain, Valvetain part(s) out of spec;
2) Cam Installation and Degreeing not accurate or missing a step;
3) The Cam Profile is such that other Valvetrain and/or Head Mods are needed to set the Valvetrain Geometry and make the Valvetrain work with the Aftermarket Cam Profile.

Like Mr. Fraizer has said; Until we can see the Cam Profile/Spec Card we're at an impasse.

 

[Valaas]

We're all trying to help, but without answering our questions and telling us what the Cam Profile/Cam Spec is is like trying to finish a JIgsaw puzzle without all the pieces.

Most of the Guys here who have asked specific questions due to the fact that;

1) Its either a required Engine Building protocol and or;
2) They've seen these issues before and know how to narrow find the solution.

If I'd venture a guess its either one, or a combination of;

1) Worn Valvetrain, Valvetain part(s) out of spec;
2) Cam Installation and Degreeing not accurate or missing a step;
3) The Cam Profile is such that other Valvetrain and/or Head Mods are needed to set the Valvetrain Geometry and make the Valvetrain work with the Aftermarket Cam Profile.

Like Mr. Fraizer has said; Until we can see the Cam Profile/Spec Card we're at an impasse.

I don't have the info asked.

However:
1.How can problems with the valvetrain happen in an engine that ran petfectly with excellent compression values prior to removing the cams, and that hasn't been turned over once yet?
2. Why, I don't understand how this warning ties with the one known fact; lobe heals that has had right around 0.90mm removed?
3. See 2.

I might come forth as defensive here, but as you point out the cam mod is being challenged by forum authorities. So defensively or not: I still cannot see the smoking gun.

Nonetheless, I am following the instructions provided by the cam company as I progress in the assembly to the letter. If that for some reason should end up in tears, they will have to fix it.