SuperCranks back in stock

[Henry Schmidt]

The new batch of Supertec SuperCranks have arrived.
Shameless promotion but I thought you guys would enjoy the art.
Cheers

[jpnovak]

Sweet.

So... 66mm for a 3.0/3.2 case? Correct?

If one was to go 66x98 to get a 3.0SS (or is it super short stroke?) what kind of rpm range could one achieve? The question to me is what does it take to get heads to flow enough air to support the rpm and what cam will utilize the flow.

[Classic 911]

Following


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[M3pilot]

Mine arrived yesterday. Thank you, Henry!!!



I wanted to build a motor for my '70 Coupe and felt pretty strongly that whatever I built, I wanted to retain the short-stroke character. I also wanted strength and a bit of peace of mind that can be challenging to achieve with a mag case. Fortunately, I happen to have a disassembled but low mile 3.0L I bought a few years ago from a retired Porsche mechanic friend of mine and the more I thought about it, the more sense Henry's SuperCrank seemed to make.

My engine will surely be more tame than what is possible with this crank but the basic configuration I am leaning toward is 95mm ~10:1 pistons, Carrillo 130mm rods (or maybe GT3 Pankls), twin plug and DC65 cams which, I am told, make good power to 7500rpm. I believe this recipe would be safe to rev to 8000 on occasion.

[mepstein]

Henry - Do you have a link on your website? Thanks

[Henry Schmidt]

Originally Posted by jpnovak

Sweet.

So... 66mm for a 3.0/3.2 case? Correct?

If one was to go 66x98 to get a 3.0SS (or is it super short stroke?) what kind of rpm range could one achieve? The question to me is what does it take to get heads to flow enough air to support the rpm and what cam will utilize the flow.

We built a 66x100mm that regularly saw 9,000rpm.
Extreme did the heads, DC90 cams and PMO 50mm (specs listed below)
We nevr ran it on a dyno but the power was dropping quickly above 8500.

We have 66mm 9 bolt cranks, 3.0, 3.2 and 3.6 case.
We also built 70.4mm 6 bolt cranks.
2.0-2.7 cases. They also fit 2.8, 3.0 RSR cases and 3.0 Turbo cases.
The 2.7 crank is really a horrible design so for those who what a replacement for the RSR crank, here it. is.

1982 930 Turbo case (GT3 squirters)
Shuffle pins
Boat Tail
Supertec SuperCrank billet 66mm
R&R billet connecting rods (GT3 config: 53mm big end, 21mm small end & 130mm oal)
GT3 Bearings coating by Calico Coating
996 TT oil pump
Racing IWIS chains Supertec idler arms
964 steal countershaft
Supertec Head studs
LN Nickie cylinders 100mm
11.5:1 JE FSR pistons, 60 grams lighter than conventional pistons
Custom DC 90 cams
Early forged rockers w/dry film pads
Extreme Cylinder heads
Port Flow Analyzer v3.0 XTREME CYLINDER HEADS
Test Comments:
Vlv Dia
1.850"
1.575"
Stem Dia.31"
Lift Range Test Flow Leak Corr Pres Pres CFM
Int #1 .100 4 28.00 34.00 .0 67.7
Int #1 .200 4 28.00 79.00 .0 157.2
Int #1 .300 5 28.00 73.50 .0 216.8
Int #1 .400 5 28.00 84.00 .0 247.8
Int #1 .500 5 28.00 89.50 .0 264.0
Exh #1 .100 4 28.00 25.00 .0 51.3
Exh #1 .200 4 28.00 53.00 .0 108.7
Exh #1 .300 4 28.00 75.00 .0 153.8
Exh #1 .400 4 28.00 87.50 .0 179.4
Exh #1 .500 4 28.00 93.00 .0 190.7

50mm PMO Carbs (manifolds 47 x 50mm)
Burnham Motorsport Twin plug distributor
Burnham Motorsport sump cover
Series 900 fan shroud
Supertec Power Pulley
Supertec RSR flywheel

[Henry Schmidt]

Here's a link to the build

http://forums.pelicanparts.com/911-engine-rebuilding-forum/748919-supertec-3-1-liter-short-stroke-9000-rpm-2-valve.html

[Henry Schmidt]

Originally Posted by mepstein

Henry - Do you have a link on your website? Thanks

My signature has my company name in it.
Pelican prefers that I don't link my site being a competitor.
Wayne and I had quite a battle over that. He kept changing my signature and I thought it was something I was doing wrong in the link.
After being banned Wayne explained it. Those early days of the internet had me jumping...I was totally lost about the how and why of computer interaction and function.

[Henry Schmidt]

Originally Posted by M3pilot

My engine will surely be more tame than what is possible with this crank but the basic configuration I am leaning toward is 95mm ~10:1 pistons, Carrillo 130mm rods (or maybe GT3 Pankls), twin plug and DC65 cams which, I am told, make good power to 7500rpm. I believe this recipe would be safe to rev to 8000 on occasion.

We built basically the same engine a couple of years ago.[ MFI of course]
Great little street motor.





https://forums.pelicanparts.com/911-engine-rebuilding-forum/1043243-fun-supertec-2-8ss-build.html

[mepstein]

Originally Posted by Henry Schmidt

My signature has my company name in it.
Pelican prefers that I don't link my site being a competitor.
Wayne and I had quite a battle over that. He kept changing my signature and I thought it was something I was doing wrong in the link.
After being banned Wayne explained it. Those early days of the internet had me jumping...I was totally lost about the how and why of computer interaction and function.

I'm sorry, I was asking about a link on your site to the crank. I was wondering about price.

[Henry Schmidt]

Originally Posted by mepstein

I'm sorry, I was asking about a link on your site to the crank. I was wondering about price.

My website is garbage. Very few of my products are list. I'll PM the price.

[Jeff Alton]

Beautiful looking cranks.

Cheers

[slow&rusty]

Lovely!

[drgouk]

Hello Henry, Have you had any made with conventional oiling, one main feeding a big end? or did you find the Porsche oiling system with the cross drill and grooving works best? Thanks

David Gouk

[Wu.wei]

Beautiful!!!

[jmz]

Nice work. Following

[RDM]

So I have to ask, Henry. What makes a SuperCrank super?

[Henry Schmidt]

Originally Posted by drgouk

Hello Henry, Have you had any made with conventional oiling, one main feeding a big end? or did you find the Porsche oiling system with the cross drill and grooving works best? Thanks

David Gouk

We believe in cross-drilling so we cross drill every crank we install. Taking that into consideration, of course all the custom cranks we have built are cross-drilled.

[911 tweaks]

Any comments on building a motor with his 66 Supertec crank?
What was your build specs & overall experience + and -…?
Thx Bob

[Harpo]

Good morning Henry,

I'm interested in pricing of a 3.2L for a 3.2L SS that I want to build

Thanks

David