Which Mahle Pistons / Cylinders?

[Glenn]

Rebuilding a stock late model Beetle fuel injected engine and there are 2 different Mahle sets. Is one better than the other and why?
311 198 069 FFG Engine Piston Set w/ Forged Pistons

311 198 069 F Engine Piston Set Flat; CR 7.7:1

And don't say the bottom because the top only comes with one piston
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

עַם יִשְׂרָאֵל חַי

[Dan Ruddock]

Glenn, the top forged ones are better but on a stock engine they are over kill.
You got my second gift, yes?

[Glenn]

[udidwht]

I'd go with AA myself. The Mahle sets I've run across have been unsightly and off out of the box. I thought I remember hearing that AA was making the Mahle sets these days?
_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires

[bugguy1967]

Heard the same thing about AA and Mahle being the same thing.

The cast pistons have longer skirts, so they'll need to be trimmed if using a C/W crank. I would vote on the forged set, just because of the lean tune of the stock FI system and the higher head temperatures.

Also, because of the a/f ratio, I believe it's important that the static compression gets set per the manual.
_________________
"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine"