Piston for HiComp 3T/2TG hybrid

[Radar]

bore: 88mm
oversize: +3.0
CR: 13.8:1
dome: 34
head cc: 63
comp height: 1.377" (3.070mm)
stroke: 3.070"
rod length: 4.835"
pin diam: 22mm
pin weight: 370gm

I know nothing of pistons as of yet, these any good? Made by supertech

[styler]

are they forgies and how much do they cost for a set of 4 and rings?

88mm is good, 89mm is getting a bit thin in the walls but
can be done on some blocks or sleeve it to suit 89mm or even
90mm (yes its expensive to sleeve)

that head cc is from a 3tc, the 2tg is less and your 2tg
head once skimmed with be even less - measure YOUR head
and do YOUR compression calculations.

34cc dome is huge, no wonder its 13.8:1 on a 3tc with
63cc head. thats a static compression ratio but still would be
suitable for a very wild cam i would say 320 deg etc...
which is not a very streetable cam. and your head is not a 3tc
at 63cc, its a 2tg head at around 50cc (measure it). so those
pistons end up at like 16:1 which is way too high in general.

[Born-Enthusiast]

Where these in a sale or a one time opportunity? I just ask because if you bought them because they where a good price you may not be able to use them and would be better off selling them yourself. Your much better off buying your pistons to suit your actual block and head when you find out what you have and what you want. With the hybrid the pistons need to be fly cut to miss hitting the valves. If these are forged I'm not too sure if you can do that without jeapodising the pistons strengths. The other thing is if these are estimated for a compression ration 13:1 if your thinking about making a street car what fuel are you going to use because I don't think performance unleaded runs that high. You will need gas or ethanol. Please correct me if I'm wrong

Hope this helps
Nathan

[jeffro ra28]

Are they made for a 2tg/3t?
Part number?

[SeptemberSquall]

dearest radar, back to grace us again

[Hurricane]

what do intend to use them for? and race motor? pump fue lwill not cut it

ive got 89mm 12-1comp arias forged pistion to sute a 3t i might be selling.

[SeptemberSquall]

with compression like that, maybe he's reviving the diesel turbo plans...

boom boom... tkish.

also, is that compression height for 2t or 3t crank throw?

[Hurricane]

with compression like that, maybe he's reviving the diesel turbo plans...

boom boom... tkish.

also, is that compression height for 2t or 3t crank throw?

his and mine are for a 3t chamber

[SeptemberSquall]

not cr, the compression height, the height of the piston from the gudgeon pin to the top of the piston skirt

[Gavatron]

dearest radar, back to grace us again

I thought so too. But it's a thread from April.

[Hurricane]

not cr, the compression height, the height of the piston from the gudgeon pin to the top of the piston skirt

ill check compaired to mine and see

[SeptemberSquall]

just google the info if you're interested, i just cbf expending my valuable time and effort to explore an idea presented by mr radar

[jeffro ra28]

Ok found it on their website. http://www.supertechperformance.com/

They also do 2tc pistons at 13.8:1 CR from 86-88mm bore.
What gets me as the dome, and comp height figures dont change on their 10:1 variant piston and the 13.8:1. meh oh well.

Link to catologue.
http://www.supertechperformance.com/...php?id_categ=4

Last page is where its at.