FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#1
|
|||
|
|||
Heads, whick one cools the center ex the best ?
Is there a consensus with the aftermarket PMD style heads as to which ones have the best cooling around the center exhaust ?
Is there much of a difference ? Tiger, High Port E head ect. |
#2
|
||||
|
||||
The E head pro port with its coolant feed hole in the center of the head.
A thermal coating applied inside the center ports on any head (especially Aliuminum) helps a good amount with burning head gaskets and extremes of thermal expansion that takes place there to chew up the head gasket over time.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#3
|
||||
|
||||
Quote:
|
#4
|
|||
|
|||
Quote:
|
#5
|
||||
|
||||
Can't say slowbird as the head gaskets have yet to fail, but test with a thermal gun show 45 degree drop in temp at the junction of the spark plug hole roll over point and the head surface just above the deck of the block.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#6
|
||||
|
||||
In regards to common available aftermarket heads I can't say , but I would tend to think that a factory iron Block with its far greater gap in between each Bore and hence coolant flow would cool the center of the motor down each bank better then a aftermarket Siamese Bore block , or a near Siamese Bore block .
Just guessing here! You can apply the same added center hose deal as the E pro port heads even to factory iron heads no less aftermarket heads. The iron heads have plenty of wall thickness to drill and tap a 1/2" pipe hole in the side wall of the heads.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#7
|
|||
|
|||
Ram air 5 layout
__________________
Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow. |
#8
|
||||
|
||||
There are a couple of pro ports out and about. :-)
__________________
"Artificial intelligence is no match for natural stupidity". 1966 GTO Post Coupe, 467ci. N/A Pump gas, best 1/4 11.6 118mph 1966 GTO Post Coupe, "The Bright Idea" 535ci. N/A Pump gas, best 1/4 9.58 141mph |
#9
|
||||
|
||||
I have dealt with old '61-'63 sd heads over the years and on one set of 980s someone had drilled a hole in the water jacket of the dual center exhaust on both sides and tapped them. I have no way of knowing if they had been NASCAR heads or drag race but the only reason they would have done this IMO would have been to install a heater hose pipe in that location on both sides to get the heat out more rapidly. Additionally I've had several sd dual quad intakes with additional threaded holes on the rear flanges both sides which too would have been to screw heater hose pipes in so heat could be more readily removed from the back of the engines/heads. These same tricks could be done on any Pontiac head. How efficient this was I haven't a clue.
|
#10
|
||||
|
||||
With a Billet head it doesn’t matter about any coolant mods.
Head gasket issues are a thing of the past.
__________________
First Pontiac powered street car in the 7's 7.940@170.84. 3460#s |
#11
|
||||
|
||||
Quote:
George |
#12
|
||||
|
||||
__________________
1978 Pontiac Grand LeMans.......out next year Previous - 2001 Jerry Haas-built P/S Grand Am - former WJ car, Hoffman Racing 535" IA2, Tiger Heads/Intake, Single Dominator, PG Best ET: 7.776 @ 175.94, 1.096 60', 2375 lbs. |
#13
|
||||
|
||||
__________________
67 Firebird 3440 lbs, Pump gas 537 IA2, tiger heads, 4.86 rear, 32 x 17.5's, full interior, 4 mufflers, street shape 1.36 60', 6.11@113.42 1/8 mi. 5.67@123 on small shot. |
#14
|
||||
|
||||
DCI RAM AIR V
|
#15
|
||||
|
||||
But can the ra5 heads match or exceed the power potential of the other heads?
|
#16
|
||||
|
||||
Before or after the head gaskets blow between the center ports? 😝
|
#17
|
||||
|
||||
Quote:
HAHAHAHAHHAH |
#18
|
|||
|
|||
We all know the RAV does away with that extra heat. High Port, Tiger or E head. Are they all the same or is one better.
I thought that High Ports had better cooling there. Do they ? Last edited by Dragncar; 09-13-2019 at 11:40 PM. |
#19
|
|||
|
|||
I STILL don't believe a head with a pushrod in the port will out perform NA head without.SHOW me!And I breath and bleed RA V!Tom
|
#20
|
||||
|
||||
Quote:
GTO George |
Reply |
Thread Tools | |
Display Modes | |
|
|