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Pistons For Your Rb30

gtst25

By gtst25,
in Engines & Forced Induction

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Endless26/30 Newbie

Endless26/30

Posted
Posted

Isn't the point of having an engine built by an engine builder the fact that they figure all that stuff out?

Hes a good mate doing in his own time so im trying to help out where ever i can. im supplying all the parts etc

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bubba
bubba

Wisecos, 8.5:1 (apparently), oem headgasket.

WMDC35
WMDC35

Maybe better off to look for a good stocker?

  • 3 months later...
AngryRB Grand Master

AngryRB

Posted
Posted (edited)

has anyone used a Tomei piston, from my search's people say they are a good piston and that Japanese pistons can be fitted tigher ( 1.9 to 2.2thou), if so it sounds like a good quiet piston apart from the extra cost of them,

how do Japanese pistons compare to the American stuff, any better or just a waste of money????? oh and im obviously referring not referring to an RB30 piston cause they don't make RB30 pistons I don't think

Edited by AngryRB
scotty nm35 Grand Master

scotty nm35

Posted
Posted

Isn't the point of having an engine built by an engine builder the fact that they figure all that stuff out?

This^

I assume most just laughed at you, as they don't want to see their newly built engine throw a rod or split the bore. Keep the compression under 10:1 imo or cylinder pressures will skyrocket.

has anyone used a Tomei piston, from my search's people say they are a good piston and that Japanese pistons can be fitted tigher ( 1.9 to 2.2thou), if so it sounds like a good quiet piston apart from the extra cost of them,

how do Japanese pistons compare to the American stuff, any better or just a waste of money????? oh and im obviously referring not referring to an RB30 piston cause they don't make RB30 pistons I don't think

Anything Tomei is generally top shelf.

No issues with the Manley pistons in my evo either. It's all down to the machinist.

AngryRB Grand Master

AngryRB

Posted
Posted (edited)

Looking at the CP and wiseco pistons in comparison to the Tomei, they have more cooling channels, so probably allows greater head expansion which suits street applications better, a titanium coated top ring sounds good but machining would have to be spot on to bed it in , there's a strange cut out on one side of the tomei skirt , not sure why.. im sure any forged piston will do the job though, just good to compare designs as the jap's seem to do a good job with the engines compared to US specs.

tomei pics are on RhdJapan website

Edited by AngryRB
Blackkers Experienced

Blackkers

Posted
Posted (edited)

I'm aiming for 10:1 with a 26 head and Nitto +7cc dome pistons; depending on how much we have to remove from the head to do so keeping acceptable quench and HG thickness etc etc.

should be interesting on E85. Can't decide whether to keep the GT-SS's or grab some -5s/2530s

edit: the nitto pistons are actually JE's

Edited by Blackkers

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