New TC cylinder heads

[garyeanderson]

I would like to see the intake and exhaust flow numbers on an independent persons flow bench in stock form and "ported" forms against a known set of heads. HP and torque figures on an engine dyno with similar spec heads with the same short block too would be nice too. Then you could do the 20k mile report if it made it that far... yes I know I'm dreaming.

Gary

[Dag-Henning]

- running the cams directly in the casting is not something new. Cosworth BD engines has been like that from the start I believe, although the cam carrier is a seperate item from the head....Do not think that has caused any severe trouble so far.

Dag

[alan71]

QED are still selling heads, ?2275 + VAT (+ set of cam bearings)

Alan.

[Robbie693]

Aren't the buckets matched to the head? In which case one would assume the new heads would be supplied with buckets..?

[cabc26b]

I went to the burtons site and saw the listing, what I recall from the quick trip is that the call it a "Sprint Spec" head ? I would love to know what the ports are like in their casting(s). Qed on the other hand offered a choice port size( one claimed to be big or race etc) . Getting a head start on the porting at the time was the attraction for me. However I can't say as I would buy a new head to send to somebody like John McCoy, Tony Ingram to port over a stock one if it was still serviceable for a hot street motor. If i am a racer looking to replace a hammered/worn out head and need want the do all you can do , I buy the new kit, However I still look for the big ports cause that can keep couple of thou in the pocket because porting is expensive no mater who does it.

my two cents

George

Other - strange the high Number of players now appearing in the gaem ( makes me think are there that many new patterns or are these guys new channels ) might/should drive the price down on donor motors and also flood ebay with tried leaky heads...

[wojeepster]

I have one of these new modern engines (mazda miata 2000ls). Unfortunately for me mazda made a run of bad ones where the engine thrust bearings fall into the sump. Without thrust bearings crankshaft and block grind together every time you step on clutch and the resulting swarf ruins every bearing in the engine. So I have a cylinder head that is ruined too. Total junk unless you want to tie your boat up to it. I like replaceble bearings....

[CBUEB1771]

I just noticed the following in the Dave Bean catalog:

"An unrelated MK2 change was the introduction of iron tappet guides to the inlet side of the head. Most heads eventually get linered -- both on the inlet and exhaust sides -- so this is not an accurate indication of the head vintage. This change was to ostensibly correct wear to the "soft" aluminum bores, although experience has shown conclusively that when you have both iron and aluminum tappet bores in the same head, it's always the iron bores that are worn. If one stops to think about it, it makes a lot of sense. Aluminum has excellent bearing characteristics, including one very important one called "imbedability". Larger abrasive particles in the oil tend to get imbedded in the soft aluminum bores and, because the tappet is relatively hard, does not wear out anything. An iron liner has little or no imbedability, so abrasives stay in suspension to lap up and down between tappet and bore. Thus the hardened tappet wears less than the softer iron bore, which is vastly harder to renew. Our solution to this is to fit heat treated aluminum liners to the head and change the oil often. This will increase service life of the tappet/bore to essentially infinity."

I make no claim regarding accuracy or currency of this information but it is interesting.