Toymods Car Club Inc: Tech & Conversions => 7MGE bore spacing and overbore limit

Toymods Car Club
www.toymods.org.au

F.A.Q.

Home

Members

Toymods » Tech & Conversions » 7MGE bore spacing and overbore limit Show: Today's Posts :: Show Polls Email to friend

Author

Topic

ed_ma61
Forums Junkie

Location:
Lost in the K hole
Registered:
May 2002

Re: 7MGE bore spacing and overbore limit

Wed, 13 August 2003 14:46

gianttomato wrote on Thu, 14 August 2003 00:14

The 7M is 32.5 and the 2JZ is 34mm. Not sure where the piston crown for the 7M sits relative to the block deck, but Ed will know for sure...Hopefully the 7M piston sits 40 thou (1mm) shy of the block deck at TDC

bzzzzt!

no such luck im afraid... 7m pistons are almost smack on flush with the deck height (give or take 1thou)

gianttomato wrote on Thu, 14 August 2003 00:14

so potentially you could then correct for the 2JZ piston sitting 0.5mm proud of the 7M block by using a thicker head gasket. What all of this will do to your squish area is something else to consider.

OR, you could simply machine the top of the 2jz pistons down. if theyre anything like the 7m pistons, there is *plenty* of meat, and valve/piston clearance to be very enthusiatis in piston crown modification (maybe not 2.0mm worth, but enough to put you in a workable ballpark)...

but this thought proces is futile as the bore spacing is too prohibitive to be considering this option.

gianttomato wrote on Thu, 14 August 2003 00:14

Certainly Jun, HKS and Toyomoto (in the States) offer stroker kits for the 2JZ(GTE) which bring the capacity out to 3.2 or 3.4 litres (depending on manufacturer)

and it'd end up being a tractor engine like the 7m
ok if you were going to push lots of boost through it, and not rev it out, but i dunno about that configuration for an NA application...

gianttomato wrote on Thu, 14 August 2003 00:14

Sounds like a real tinkery kind of thing to do. I'd probably get a stuffed 7M and a 2JZ piston, have one bore bored to 86 mm and start measuring things.

yeah, i think that road would end in tears... sorry Sad

cheers
ed

[Report message to a moderator]

[Message index]

-=] Back to Top [=-

Current Time: Mon Jul 28 23:09:41 UTC 2025

Total time taken to generate the page: 0.07929801940918 seconds

.:: Contact :: Home ::.