SCAT'S Split Ports With New Rocker Box Design

[doc]

Gentlemen, gentlemen. After 60 years, the silly little deflectors still inspire debate. It will never end.

Wonderful pics and stories of past experience. So few of us really build the high end stuff, but i always love the stories.

doc

[Clatter]

The angle of the pushrod tubes into the rocker box bugs me.
I know that the T1 did that to a certain extent, but...


Did they bear the shafts unevenly, or smack the thrust side of the rockershaft?

[Type 4 Unleashed]

The angle of the push rod tubes into the rocker box bugs me.
I know that the T1 did that to a certain extent, but...


Did they bear the shafts unevenly, or smack the thrust side of the rocker shaft?

The heads were designed for the Type 1, and are just re drilled for the Typ lV stud pattern. so on the No. 1 & 4 cyl's the exh lifter on a Type lV is in a different location than a Type 1, and so are angled.

They wouldn't smack the thrust side of the rockers, but put continuous pressure. And due to the rockers being closer together and the shafts are shorter and secured at 3 points, I see a far stronger setup with very little if any shaft deflection compared to the stock Type lV setup.

[Type 4 Unleashed]

Here are a set of the old style for the Type 1: Scat Split Port Heads

[Piledriver]

Here are a set of the old style for the Type 1: Scat Split Port Heads

Minus the rockers to boot...

[Frallan]

Any updates?

Anyone know of any new style Scat Split ports being sold/installed/used?
Any flow numbers around?

[Wally]

Yeah, friend of mine over here has them installed on a 71x103 engine in a vert with a rotrex on top. He is still tuning afaik.

[Frallan]

Thanks Wally!
Any way to get more information out of him?
On delivery, quality, general satisfaction and more?

[Wally]

He isn't in forums and I don;t even have his email or contact details.

I did see the heads just before assembly though and he had them ported and detailed to the max. They looked GREAT!
Understood he was very happy with them, and liked the new construction a lot. Said port lay-out was more symmetrical between left-right heads and of course no more rocker shafts through the rocker walls helped too.
He ran the old type before these (and lost a seat iirc), so if anyone can compare...

Also understood they were back ordered for a looooong time and then all of a sudden arrived after some phone calls or something. Don't know exactly anymore what the story was.

[Frallan]

That is a lot of information and I like it.
I would consider ordering them rough and finish them with JM7 bronze seats and own detailing then.
Now ordering and backlog time, is a turn-off that mean lost business from my side.

I will see if I can get someone with leverage to get a real answer on delivery time, in that case. Or no go.

2366 with Danish Supercharger...I like it!

[Arnoud]

Hey is this the convertible with the Scat splitport heads?
http://www.youtube.com/watch?v=YeBxbXZ7eFY

[Wally]

Yep, he then had the old type split ports still on them.

[Frallan]

http://www.nitrousbeetle.com/nyheterdetailE.asp?ID=98

Cross information from a new thread I started on the same topic, looking for more information in Europe.
...and look!
Flow numbers from JPM. 225 CFM at 25" That is after Johannes ported them. Interesting. ...and THANKS Beetle Bug for sharing.

[Steve Arndt]

http://www.nitrousbeetle.com/nyheterdetailE.asp?ID=98

Cross information from a new thread I started on the same topic, looking for more information in Europe.
...and look!
Flow numbers from JPM. 225 CFM at 25" That is after Johannes ported them. Interesting. ...and THANKS Beetle Bug for sharing.

225 after hand porting? weak sauce? Must have insane port velocity.

[Arnoud]

@Wally:is the builder of the original splitport engine the one that has the purple dragster?