cylinder heads problem

Very much doubt that but so long as the end result is good.

 

I do this for a living on Ferrari comp cars..
which is to say-in lay terms-clearances are more criticak than in street cars.
The width of berth for error-slop-is MUCH greater in street cars..
that said, most of the stuff being said is incorrect, and frankly just plain wrong...
for what reasons... is not germain to obtaining what it is you require, desire, and PAID FOR...

NOS cams have NOT been available for 25 years, so there...
re-grinding, and re-welding the lobes has been a common-and largely unsuccessful-remedial process for the interm time period.
New, reproduction, gundrilled blanks, ground on a Landis CNC camshaft manufacturing,
machine are available in both europe, and here in the US.
NOT cheap, and inspection of final product includes an RC hardness test on the heels of the basecircles...60-62, no more, no less.

Installed valve/spring height is a "god reference"
One makes all neccessary repolacement parts as is required inorder to maintain a midrange target dimension whilst maintaining these boundary dimensions...

Improper seat manufacture from genericly available blanks, out of box new valves, as opposed to made from s-steel "blanks", and the loss of original cam's base circle diameter ALL contribute to your conditions here...
DINO/four cam 275s....are the ONLY cars to have the large base circle cams, and the failure rate in valvetrain components is well documented over the last 40 years....
the accelleration/decelleration speeds9inertial momentum) and the lack of oil supply are principle component factors in these failure rates... in my expoerience.
Thus, altered cams tend to exacerbate an already unsure footing...

Personally, I would move on-despite expenses involved-and get the job done properly, AND TO SPECIFICATION-poeriod....
god luck, and,
FWIW...

 

$9,000 paid and the job is not correct....something is wrong here" Dino Specialist' my......
If the guy does not take the heads back and provide a decent set.....I don't know.... post his/their name to make sure no one else gets ripped off!

 

i do this for a living to and i can supply a set of N.O.S cams no problemas

 

cant tell his name, he is a polstergeist

 

I can only add, that I buy all my parts in the UK not in Germany.....

 

FWIW I think we are all singing from the same hymn sheet.

 

always good to be prepared if you deal with this "specialist".....

 

do you have the heads or are they with the special one?

 

as long as you buy the cams from them right?
At the end of all this will you end up with a one off set of Dino heads or, will the heads and, cams be brought back to standard specs

 

the only thought I had was, legal = money and delay, in the meantime they hang on to your heads. Possession being what it is

 

1. Messing things up
2. Forcing an upsell to fix items messed up in 1.
3. Keeping customer goods until all open bills are paid up front

Sincerely hope he does not go that routine again...