GermanLook Forums  

Go Back   GermanLook Forums > Technical Section > Engines

Reply
 
Thread Tools Display Modes
  #1  
Old January 25th 2004, 19:03
boygenius's Avatar
boygenius boygenius is offline
Registered User
 
Join Date: Nov 2003
Location: Spring Hill. Florida
Posts: 1,663
Don't forget about the labor costs of having your case and heads machined for the larger cylinders and special tools for engine assembly.
__________________
I love my money pit, uhm, err, I mean my car.
1969 beetle in the works... 2.0 type 4 DTM...
2004 Suzuki GSX-R 1000 crashed
www.volksport.net Volksport Kfer Gruppe
Reply With Quote
  #2  
Old January 25th 2004, 19:06
super vw super vw is offline
Registered User
 
Join Date: Jul 2002
Location: Bend/Sunriver, Oregon
Posts: 695
Yeah, i know... im forced to have my case bored and taped for full flow at Rymco down in california. Localy no one can do this kind of work (well at least no one knows VW's)
Reply With Quote
  #3  
Old January 25th 2004, 19:06
fast70's Avatar
fast70 fast70 is offline
Registered User
 
Join Date: Jan 2003
Location: Gibson City, IL
Posts: 54
I'm not sure, but I think that the Scat kit uses a cast crank.

fast70
Reply With Quote
  #4  
Old January 25th 2004, 19:08
super vw super vw is offline
Registered User
 
Join Date: Jul 2002
Location: Bend/Sunriver, Oregon
Posts: 695
Quote:
Originally Posted by fast70
I'm not sure, but I think that the Scat kit uses a cast crank.

fast70
I think is does aswell, is there any thing wrong with a cast crank? is the stock crank cast?
Reply With Quote
  #5  
Old January 25th 2004, 19:13
fast70's Avatar
fast70 fast70 is offline
Registered User
 
Join Date: Jan 2003
Location: Gibson City, IL
Posts: 54
The stock crank is forged, because when Ferdinand was designing the engine they found that the cast cranks had the fault of snapping after spirited use. Therefore, since you said you want to use your car for Auto-X, I would stay away from the cast crank and buy a forged. From what I hear, CB Performance now makes 76mm forged cranks for the same cost as a 69mm. So for maximum displacement on a budget that is what I would go with.

fast70
Reply With Quote
  #6  
Old January 25th 2004, 19:19
boygenius's Avatar
boygenius boygenius is offline
Registered User
 
Join Date: Nov 2003
Location: Spring Hill. Florida
Posts: 1,663
I think the stock crank is forged. The scat cast crank is supposed to be good for 5,500 rpm and 125hp.
__________________
I love my money pit, uhm, err, I mean my car.
1969 beetle in the works... 2.0 type 4 DTM...
2004 Suzuki GSX-R 1000 crashed
www.volksport.net Volksport Kfer Gruppe
Reply With Quote
  #7  
Old January 25th 2004, 19:20
boygenius's Avatar
boygenius boygenius is offline
Registered User
 
Join Date: Nov 2003
Location: Spring Hill. Florida
Posts: 1,663
What is the biggest stroke crank you can run without clearancing the case???
__________________
I love my money pit, uhm, err, I mean my car.
1969 beetle in the works... 2.0 type 4 DTM...
2004 Suzuki GSX-R 1000 crashed
www.volksport.net Volksport Kfer Gruppe
Reply With Quote
  #8  
Old January 25th 2004, 19:21
super vw super vw is offline
Registered User
 
Join Date: Jul 2002
Location: Bend/Sunriver, Oregon
Posts: 695
Quote:
Originally Posted by boygenius
What is the biggest stroke crank you can run without clearancing the case???

I think its the stock 69mm
Reply With Quote
  #9  
Old January 25th 2004, 22:30
fast70's Avatar
fast70 fast70 is offline
Registered User
 
Join Date: Jan 2003
Location: Gibson City, IL
Posts: 54
The biggest without clearancing is 76mm although a 78 will fit with just minor clearancing. The stock crank is forged. To be safe, if you are comming anywhere near the HP threshold number, I would go with forged. It is cheap insurance. I have a friend who made the mistake of buying a cast crank and has had to have the crank turned down twice with only a couple thousand miles on the motor. So even though it is not that expensive to have turned:
1. It weakens the crank even farther
2. By the time the cost of the crank and cutting are added you have exceeded the cost of a forged crank.
3. Each time they need to be cut, the motor has to be torn down and new oversize bearings bought. So factor in the cost of a couple of sets of bearings.
4. You are taking unneccessary chances and stretching the rubber band to save a few bucks.

fast70
Reply With Quote
  #10  
Old January 25th 2004, 22:36
Eurolook71 Eurolook71 is offline
Registered User
 
Join Date: Aug 2002
Location: Alhambra, Ca
Posts: 116
You can run up to a 76 crank without doing anything to the case, but the rods will need a little clearancing where the bolts are...or is that a 74???.... ... i know a 74 will fit for sure....


I would stay away form a cast crank like the plauge, but that's my opinion.
Its just extra insurance knowing the heart of your well balanced engine wont snap if you wanted to have a little fun.


Maybe wait a while till you can get a Scat Volkstroker 2 kits, (that cast crank is the volkstroker 3 kit)

These are more expensive but, well, in the end you have a more reliable crank....you got what you paid for.

For the VS 2 kit and full flow parts and pushrods, etc, etc...go to aircooled.net

They have a full-flow kit, with modified and blue-printed pump and everything you need for I think $130. Also, if you get your carbs here, they help you set them up with the right jets and stuff. Check it out....

I wanst aware that CBP was selling their 76 cranks for the same price as a 69....i'll have to check that out...I havent bought my new crank yet soo....
__________________
=EuroLook71=
71' Super Beetle
1.6L DP - Kadrons, stock heads P&P by me

Last edited by Eurolook71; January 25th 2004 at 22:43.
Reply With Quote
  #11  
Old January 25th 2004, 19:20
super vw super vw is offline
Registered User
 
Join Date: Jul 2002
Location: Bend/Sunriver, Oregon
Posts: 695
So is it SAFE to use a cast crank? i dont plan to go past 5500 rpm, but im sure i will have damn near 120hp once done
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:09.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
© www.GermanLook.net 2002-2017. All Rights Reserved