What forged pistons

hollandgalant · Post by **hollandgalant** » Mon Sep 28, 2009 8:16 pm

I want to put forged pistons in my starion 4g63 SOHC. I have a RPW stage 2 cam. Does anyone knows what pistons can be used to behold the valve clearance? I was thinking about the wiseco 9.0:1

OLD FART · Post by **OLD FART** » Tue Sep 29, 2009 3:44 am

SOHC motors are not interferance so if you break a cam belt nothing hits and gets bent so your choice of pistons will be fine :)
If the same thing happens in a DOHC $$$$$ :(

Entaran · Post by **Entaran** » Tue Sep 29, 2009 7:58 pm

wiseco's make a shitload of noise. Rattle like bastards.

Good piston tho.

Anchor · Post by **Anchor** » Tue Sep 29, 2009 8:18 pm

Can you get a cam so massive that it makes it interferance??

When i got that head off you rad i remember i couldn't put it flat as a few valves were below the bottom of the head...

OT: i used CP's.

OLD FART · Post by **OLD FART** » Wed Sep 30, 2009 5:51 am

Anchor wrote:Can you get a cam so massive that it makes it interferance??

When i got that head off you rad i remember i couldn't put it flat as a few valves were below the bottom of the head...

OT: i used CP's.

BUT Did the valves line up with the flycuts in the pistons ??????

docile · Post by **docile** » Thu Oct 01, 2009 8:11 am

OLD FART wrote:
Anchor wrote:Can you get a cam so massive that it makes it interferance??

When i got that head off you rad i remember i couldn't put it flat as a few valves were below the bottom of the head...

OT: i used CP's.
BUT Did the valves line up with the flycuts in the pistons ??????

No would be the answer to that unless you get custom.

hollandgalant · Post by **hollandgalant** » Thu Oct 01, 2009 6:12 pm

OLD FART wrote:SOHC motors are not interferance so if you break a cam belt nothing hits and gets bent so your choice of pistons will be fine :)
If the same thing happens in a DOHC $$$$$ :(

But is it still non interferance when you use pistons with a comp ratio of 9,0:1 and a stage 2 cam?

RiceThief · Post by **RiceThief** » Thu Oct 01, 2009 7:00 pm

My understanding has been that using dohc pistons in the sohc will make it an interference engine.

redzone · Post by **redzone** » Thu Oct 01, 2009 7:06 pm

a forum member down south tried that out and they're still not interference ;)

RiceThief · Post by **RiceThief** » Thu Oct 01, 2009 7:10 pm

redzone wrote:a forum member down south tried that out and they're still not interference ;)

I stand corrected then, good to hear though.

Starion VR4 · Post by **Starion VR4** » Thu Oct 01, 2009 7:18 pm

redzone wrote:a forum member down south tried that out and they're still not interference ;)

I'll 2nd that... they WON'T hit on a stage 2 cam.

Lummy · Post by **Lummy** » Thu Oct 01, 2009 8:48 pm

Entaran wrote:wiseco's make a shitload of noise. Rattle like bastards.

Good piston tho.

So it's the brand of the piston and not the tolerance that made the noise?

Wow.

enthuzed · Post by **enthuzed** » Fri Oct 02, 2009 9:27 pm

redzone wrote:a forum member down south tried that out and they're still not interference ;)

Two of us in Melbourne (same suburb too, amazing!) have used VR4 style pistons and yes this is correct. Also drops the comp ratio a bit :)

Anchor · Post by **Anchor** » Tue Oct 06, 2009 2:26 pm

I used DOHC 9.0:1 CP's and a massive cam. Still no interferance. :)

Entaran · Post by **Entaran** » Wed Oct 07, 2009 5:49 pm

Lummy wrote:
Entaran wrote:wiseco's make a shitload of noise. Rattle like bastards.

Good piston tho.
So it's the brand of the piston and not the tolerance that made the noise?

Wow.

It's more to do with the quality of the alloy and the heat properties of it rather than the tolerances.

If the piston shrinks or expands more than another BRAND's alloy then yes, it will make less or more noise.

Metallurgy is a fun subject! So is thermodynamics :/

Austarion

What forged pistons

What forged pistons

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