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'85 Piston in '86 Engine
Posted: Fri Feb 01, 2008 4:00 pm
by 79vwrabbit
Has anyone put a (stock) '85 piston in an '86 barrel? Are the piston dimensions the same? I know the '86 has a recessed dome and the '85 doesn't. And I really need to know if the '86 head fits comfortably with enough squish clearance. I haven't ordered my piston yet, and I'm trying to decide if I should get an '85 piston instead of the '86. Thanks in advance.
Posted: Fri Feb 01, 2008 5:53 pm
by MySpree
it works
Posted: Fri Feb 01, 2008 6:18 pm
by Kenny_McCormic
i thought that 85s were dished and 86s were domed?
Posted: Fri Feb 01, 2008 6:22 pm
by chevyguyjay
u r true kenny. 84-85 pistons r dished. 86-87 r dome. id get a dome piston and use a 84-85 head cause of the smaller combustion chamber. but yes, u can interchange pistons and cylinders. wont hurt anything. 
Posted: Sat Feb 02, 2008 8:43 pm
by uspmale
Yep, on all my Spree rebuilds, I use the 1986 piston.
No prblems to date.
Posted: Sun Feb 03, 2008 1:57 am
by wikked_spree57
I ordered an 85 piston for my 85 I had... I got a domed one instead of dished. I did notice a difference in power, but it wasn't enough to boast about.