ok i am confused now

[1mean88z]

i am trying to figure what the hell this head is:
782 casting (TS) stamped on the side of #4
crossdrilled. i removed this head from a 89 es tbi
i don't know the history of the head so i am changing the exhaust valves anyway i just want to make sure that the roller cam is the same. i don't cam timing to be off!

[Shelby VNT]

A 782 casting number means it is a cross drilled 'fastburn' head. These heads were used in both throttle body injection cars, as the donor you pulled it from was, and our '86 ( I believe) and newer turbocharged cars. The valve springs are different but the valves are the same. If you want to run this on a turbo car you will need stronger valve springs. Otherwise it should work fine.

[86Shelby]

You can use the head itself with no problems. You will need to change the valve springs and the exhaust valves. The turbo exhaust valves are made of a stronger material, the TBI exhaust valves will end up burnt in a short time when used in a turbo engine.

EDIT: As far as the cam goes. If you are using it on a common block engine '89+ there will be no cam timing problems. The cam sprockets were machines slightly differently over the years. If you're using it on a pre-common block engine the cam timing will be off just a couple degrees. Nothing much to worry about, the low or high RPM end will be a bit stronger than the other as result of the slightly offset cam timing. If you don't like the way it performs buy some camshaft offset keyways from Mopar Performance to tune it as you like.

[1mean88z]

my engine is a 88 2.2 shelby z. the donor was an 89 n/a.
still not clear on what is going on. i talked to cindy and she said just change the exhaust valves nothing about springs. i also run a square tooth sprocket if that makes a differance.

[macncheese]

ok, time for me to learn something. i thought the TS stood for tapered shroud and was only used on the turbo cars. is it possible this head was swapped onto a n/a car? and of course if it was swapped, the valves could have been replaced with n/a units as well, but is there a way to tell? they have to have a different shape/weight, right?
tony

[glhs727]

if using on your 88 head, you will need to use the cam sprocket from the 88 to match your crank sprocket, and I would also keep the cam from your old head or use an adjustable sprocket as the 84-88 cams/sprockets had a different centerline than the 89 round tooth set-up. Yes, you should change valve springs as a good idea, but definitely have to change the valves. Also not all 782 are crossdriled. The early 782's were not crossdrilled.
later,
Cindy

[glhsken]

T/s is tapered shroud and only on the turbo cars.

[1mean88z]

thanks everyone

[turbovanman]

Quote:

Originally posted by glhsken T/s is tapered shroud and only on the turbo cars.

What does that mean for performance? I bought a used early turbo log 782 head I am having flowed and ported. Whats the deal? I will be probably run oversize valves.

[Dan Culkin]

Quote:

Originally posted by Shelby VNT A 782 casting number means it is a cross drilled 'fastburn' head. These heads were used in both throttle body injection cars, as the donor you pulled it from was, and our '86 ( I believe) and newer turbocharged cars. The valve springs are different but the valves are the same. If you want to run this on a turbo car you will need stronger valve springs. Otherwise it should work fine.

Two things ...

A 782 casting may or may not be cross drilled. You have to look at the gasket side of the head to see if it's cross drilled. 86-88 T1s and NAs all could have non-cross drilled 782 heads.

Change valve springs? Maybe ... I've found it to not be necessary, but I know NA (and I think turbo ones too) spring rates changed over the years.