Does anybody make a cast iron ecotec head? just wondering.
horsepower is the force that determines at what speed you hit the wall, torque is the force that determines how far you take the wall with you after you hit it.
Iron head on aluminum block.... that's a old cadi F up of the 90's....
if you want something like that, may I suggest the old 4 TEC?
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
acctually a cast head on an aluminum block is a good compbo because the cast head retains heat, increasing cylinder temps and thus pressure. the more pressure the more power. if you where to change a cast head to aluminum you would have to increase the compression ratio by aboout .4 just to keep the same amount of power. so thats why im curious as to if anybody made a cast head for the eco. But i've been thinking and startin to wonder if one could ceramic coat an aluminum head? anybody know anout that one?
horsepower is the force that determines at what speed you hit the wall, torque is the force that determines how far you take the wall with you after you hit it.
^^You mean the HT (High-Tech) series engines, that premeired in the early-'80s as an answer to the heavy, reduced displacement V-8s based on the old 472/500ci (That's 8.2L, y'all!) blocks . Between the electrolosis problems (From non-Dexcool coolants at the time) and uneven heating cycle differences (Aluminum's faster than iron) that effected head gasket sealing, this was an effort in desperation to make efficient, smooth-running engine that wasn't up to standards expected by traditional Caddilac buyers, and sales plummeted as a result. In fact, Caddilac engineers knew it was a bad idea pretty much from the get-go, so it saw limited use in the RWD full-size models (Fleetwood Broughams) and the longways-style engine mounting Eldorado until GM decided to drop putting division-specific engines under the hood & just stuck Chevy small-block V-8s in them. The compact FWD models saw use of them (Including the Allante), and displacement increase, until the Northstar was introduced.
They did however help introduce the first digital computer controled TBI systems, and were backed with first OD-automatic transmissions, which made way to other GM models & helped quite a bit in meeting the increasingly strengent CAFE & EPA standards with each passing year... So they weren't all bad. Some even saw hundreds of thousands of miles of trouble-free service, and are still going.
The advantage of an aluminum head is mainly reduced engine weight. And it's been found that up to a full point of compression increase could be had with them whil still running the same octane. As for heat-coating the chambers of aluminum heads... Yes, it's been done. And to much success.
Go beyond the "bolt-on".
02 silver cavy wrote:acctually a cast head on an aluminum block is a good compbo because the cast head retains heat, increasing cylinder temps and thus pressure. the more pressure the more power. if you where to change a cast head to aluminum you would have to increase the compression ratio by aboout .4 just to keep the same amount of power. so thats why im curious as to if anybody made a cast head for the eco. But i've been thinking and startin to wonder if one could ceramic coat an aluminum head? anybody know anout that one?
last I checked every ecotec head is cast. Cast aluminum.
I can guarantee that there are, and will never be, a cast iron head for the ecotec ever.
and increasing heat should never be a way of making more power. there's that thing called detonation...
Cast iron heads do hold heat...
But can cause detonation\spark retard due to hot spots... why do ya think every auto (gas) manufacture went to alum heads?
Once more, if you want one, get a 4 TEC... they even have a DOHC set up for it, but i think it had a alum head.....
PJ, ya beat me to it!
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
DaFlyinSkwir(LS61) /PJ/ OEM+ wrote:02 silver cavy wrote:acctually a cast head on an aluminum block is a good compbo because the cast head retains heat, increasing cylinder temps and thus pressure. the more pressure the more power. if you where to change a cast head to aluminum you would have to increase the compression ratio by aboout .4 just to keep the same amount of power. so thats why im curious as to if anybody made a cast head for the eco. But i've been thinking and startin to wonder if one could ceramic coat an aluminum head? anybody know anout that one?
last I checked every ecotec head is cast. Cast aluminum.
I can guarantee that there are, and will never be, a cast iron head for the ecotec ever.
and increasing heat should never be a way of making more power. there's that thing called detonation...
It's not a matter of increasing heat, but containing heat-loss to the surrounding metal & coolant. That helps prevent loss of potential power & increases efficiency, much like raising the dynamic compression.
Go beyond the "bolt-on".
Taetsch Z-24 wrote:Cast iron heads do hold heat...
But can cause detonation\spark retard due to hot spots... why do ya think every auto (gas) manufacture went to alum heads?
Weight savings, partially... And true, a aluminum head is more forgiving than iron to certain levels of octane used with a given dynamic compression. Diesels even have them, these days...
Go beyond the "bolt-on".
