5S-FE has a weak head...?

[tHa kNiGHt FaLL]

front wha i just heard... 1jz... valves/springs and retainers are a direct replacement allowing more flow...

i'm just throwing this out there... i haven't done any research on it yet... but i've heard it from multiple sources which to me makes it worth researching.

i mean.... aslong as it seats on compression.... why not... you can get 1jz valvetrain from a junk easily.

imma have to check in on this... nice cause cali CHP can't see this...

[moogleX]

for modding a 5s-fe? my engine needs some work done, been debating on what to do, fix and mod up the 5s, swap 3s etc.
before i spend the money to swap, how much diff does the hard-top vs t-tops really make? my friend rants on and on about hard tops structureal rigidity being a HUGE factor. i understand his point, but i dont think its that big of a deal less your hardcore track racing or something. any thoughts?

[91MR2quickNA]

The 1JZ was never offered in the U.S., but yes, the 2JZ valves fit the 93+ 5SFE head, and the 3SGTE valves fit the 90-92 5SFE head. Either are 1mm oversize.

You should really only consider this after you've already done cams and headers. It complements both. Some port work helps too.

[MR2Jedi]

Originally Posted by moogleX

for modding a 5s-fe? my engine needs some work done, been debating on what to do, fix and mod up the 5s, swap 3s etc.
before i spend the money to swap, how much diff does the hard-top vs t-tops really make? my friend rants on and on about hard tops structureal rigidity being a HUGE factor. i understand his point, but i dont think its that big of a deal less your hardcore track racing or something. any thoughts?

It's somewhat a factor, but I wouldn't call it a major one. there are other ways of sureing up structual integrity. Jeff Fazio (Jeckyl and Hyde Racing)has a T-Top and he's using it for hill climbs-and setting some records on top of that. Given that, I would say it's negligible...

[tHa kNiGHt FaLL]

Originally Posted by 91MR2quickNA

The 1JZ was never offered in the U.S., but yes, the 2JZ valves fit the 93+ 5SFE head, and the 3SGTE valves fit the 90-92 5SFE head. Either are 1mm oversize.

You should really only consider this after you've already done cams and headers. It complements both. Some port work helps too.

that much is obvious...


i thought the 1jz was the second gen supra... the 6 w/ the single turbo...

anyways i read it correctly... maybe they had it wrong.


but its always nice to see performace options for the 5S-FE