| Author |
Message |
58Dub
Samba Member
Joined: June 02, 2004
Posts: 1713
Location: Davison, MI
|
 Posted: Tue Mar 18, 2014 5:20 am Post subject: Cylinders and boost |
 |
|
Im looking for a little info from folks with experience.... With my current build, I am planning on using AA thickwall 92 cyls, run E85 FI and a turbo. This will be my first turbo... so Im no expert. I keep debating if I should stick with this plan or switch to 94mm cyls and the squishy pistons from Aircooled.net. I have read stories of people cracking cyls from boost,... but how much boost will a 94mm cyl take on a regular basis? This will be a street car and not just a limited use drag car.
Any feedback would be appreciated
Matt
_________________
58 Beetle (now just a pile of parts in the corner)
60 Beetle (2221 turbo under construction)
70 Beetle Baja project |
|
| Back to top |
|
 |
VWCOOL
Samba Member
Joined: June 02, 2006
Posts: 1821
Location: Down under
|
| Posted: Tue Mar 18, 2014 5:34 am Post subject: |
|
|
My engine builder Stan Pobjoy runs (I think) 20psi through his 1916 from an ex-Mustang Eaton blower. It's in an open wheeler and runs injected meth  |
|
| Back to top |
|
|
madmike
Samba Member
Joined: July 11, 2005
Posts: 5292
Location: Atlanta,Michigan
|
| Posted: Tue Mar 18, 2014 5:54 am Post subject: |
|
|
Hey Matt, I've runn 15-18lbs without issues 
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works" |
|
| Back to top |
|
|
mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
|
| Posted: Tue Mar 18, 2014 9:44 am Post subject: |
|
|
| a lot of new cylinders are jagged on the top id and or od.get rid of the jagged edges and you have a lot less chance of spliting/cracking them. I have a set of AA's that are horriffic. |
|
| Back to top |
|
|
modok
Samba Member
Joined: October 30, 2009
Posts: 26790
Location: Colorado Springs
|
| Posted: Tue Mar 18, 2014 4:53 pm Post subject: |
|
|
Go 94 and get the squishy pistons.
It is true that with more heat and compression the service life of the cylinder will be shorter, but cracking one is almost always a detonation problem, no matter if they admit it or not. |
|
| Back to top |
|
|
yamaducci
Samba Member
Joined: March 30, 2010
Posts: 2335
Location: Mount Airy, Maryland
|
| Posted: Thu Mar 20, 2014 11:56 am Post subject: |
|
|
I have split an AA cylinder with boost and too much heat. You won't be running reliably anything more than about 12Lbs on the street so you should be fine as long as your cooling system is up to par and your timing never allows detonation. Both combinations are great. The thickwalled Turbo or the squishy 94's. I went with wiseco's and 94's but if I was really going for reliability I would have gone with thicker cylinders for the insurance.
_________________
-John Cox
My 2498 Turbo Re-Build Thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=5578697#5578697
3rd Brake Light Safety Stars- I still have a couple with blue light left. Email me if interested. |
|
| Back to top |
|
|
|
