SCAT Split-Port Heads

V-DuB · Post by **V-DuB** » Thu Feb 19, 2004 6:24 am

Has anyone used Scat split-port heads before on there type 4? If so how was the install? I'm trying to get a feel for after market heads for my rebuild coming up. Thanks for the help.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Thu Feb 19, 2004 7:04 am

Used ONE set- thats the last set.

They need to be re-engineered. You can make them work with alot of machining and improvision.

Most all aftermerket heads share on issue, lack of cooling fins and fins that are the wrong shape/size and positioned incorrectly on the head for optimum cooling.

Post by **Piledriver** » Thu Feb 19, 2004 10:10 am

Talk to Bobtail--- The 911 heads setup might work out less expensive by the time you get it finished...

I looked at the split ports a few years ago, and by the time you actually had all the parts actually required (not knowing about the fit issues) it was going to cost more than twice what they advertise.

59Eldo · Post by **59Eldo** » Sun Feb 22, 2004 7:18 pm

All I can tell you is, if I were you I wouldnt touch them with a 50 ft....no excuse me 400 ft pole pole if you can help it. I ran them on my 2600 cc t4 and had valves locking up in the heads do to lack of oil the valve stems would recieve. The engine would run for maybe 5 to 10 minutes then a valve would lock up and good ol' mister piston would be right there to ram that vanvle home bent. Not to mention that they leak like niagra falls and is pretty much impossible to setup rocker arm geometry. And if you do decide to get them stay away from the .687 rocker shafts. Do yourself a favor and buy .707's. Scat never stocks the .687 rockers and you are forced to but Autocraft needle bearing rockers which wear quikly. One last thing. GOOD LUCK finging a pushrod tube. T4-T1 tubes are hard to come

lol

Post by **Piledriver** » Sun Feb 22, 2004 9:41 pm

Sound like a voice of experience.
:-(
I feel your pain.

I cannot honestly say I have ever spoken to anyone with any good words about the split ports...

59Eldo · Post by **59Eldo** » Mon Feb 23, 2004 8:31 am

The only person I have spoken with that seems to love these heads is Damon Harmon. He seems to swear by them and by how fast his Quater Toy is I wouldnt doubt his exp. with them has been a good one. I have never used them on a Type 1 but Im sure its much less involved getting them to work right on type 1's then type 4's.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Mon Feb 23, 2004 9:22 am

Damon had to totally rework his heads. I have used these heads once and thats the last time.

Scat and I have talked about redesigning them for the TIV to make them better- don't think it will happen.

59Eldo · Post by **59Eldo** » Mon Feb 23, 2004 11:12 am

Im sure Scat wont move on that either. If I recall...in the machining process I lost a whole fin on each head to get type 4 barrels to seat, and one fin on those heads is 20 % of the heads cooling! Thats one thing they could imporve on. The most irratating thing about all of this is that while going through all of my problems with these heads the least help came from Scat. They had so little knowledge of their own product it was embarrasing.

59Eldo · Post by **59Eldo** » Mon Feb 23, 2004 11:13 am

Im sure Scat wont move on that either. If I recall...in the machining process I lost a whole fin on each head to get type 4 barrels to seat, and one fin on those heads is 20 % of the heads cooling! Thats one thing they could imporve on. The most irratating thing about all of this is that while going through all of my problems with these heads the least help came from Scat. They had so little knowledge of their own product it was embarrasing.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Mon Feb 23, 2004 11:17 am

The precise measurement is .330" and thats more than a whole fin.

They have tones of split port castings made with no machining done to them.

They could/can be made better but its not fun.

Russ1302 · Post by **Russ1302** » Tue Feb 24, 2004 9:00 pm

The Machinest that did my heads showed me pictures of a T4 he built using scat split port heads. He does the best heads around. If want a set contact Petrucci Racing Engines in Farmington Michigan.
Russ

John Massengale · Post by **John Massengale** » Wed Feb 25, 2004 6:09 pm

the Split ports I got on my 2600 type 4 are running well, Had to build valve oil squirters to stop seizing valves, But 50 by 40, type 1 plug location, and exhaust location, type 1 exhaust, (moded a little) all worth it to me, oil cools the heads, running with not much problems now, cooled by DTM, 9.9CR, in California Now

fits in car well, exhaust is perfect fit, plenty of room either side, not any harder to fit then other type 4 stuff, and maybee the same as any dual carbed type 1.

John

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Wed Feb 25, 2004 7:43 pm

They are a good idea, but they just can't be used off the shelf... Maybe I'll try to talk Scat into selling me some blank castings and do all the machine work myself.

59Eldo · Post by **59Eldo** » Mon Mar 01, 2004 2:13 pm

John glad to see that you have all the problems worked out. BTW did you ever end up bending any valves?