Can this head work with the 3SFE

[almc2242]

Can this head work with my 3SFE block. Even though I have a 3SFE manifold with a turbo on it?

[IMG][/IMG]
[IMG][/IMG]

[fredk]

yep, but build a bomb shelter around it if you turn up the boost, i think you will have to build up the bottom end just so it will stay together

[almc2242]

I will go into a 3SFE that is ina 1997 RAV4. I'm thinking of a 5SFe crank or even a 3SGTE Crank. Boost, at a cool 7 pounds for the street. Come Back.

[silverstreakin]

what gen ge head is that?

it looks nothing like the gte head i have.


7 lbs should be fine as long as you tune it decently...but i think thats with any engine.

i hear the ge head on the fe bottom will actually make the compression drop. deep and i have had that conversation before

[Tommy]

you cant change the head on a FE to a GE..wont work sorry its been discused before, valve clearence is off, youll kill everything if you do it, these saddly arent like honda engines

nice manifold and turbo though...good luck with that.

[88 LE]

Originally Posted by almc2242

I'm thinking of a 5SFe crank or even a 3SGTE Crank. Boost, at a cool 7 pounds for the street.

I hope you know that a 5S crank has bigger rod journals vs. a 3S crank. So your existing rods will not work with it.

Your stock crank will hold up fine with 7 psi.

[Pineapple]

Originally Posted by Stevethecleric

you cant change the head on a FE to a GE..wont work sorry its been discused before, valve clearence is off, youll kill everything if you do it, these saddly arent like honda engines

nice manifold and turbo though...good luck with that.

Somehow people are able to use 3S-GE head on 5S-FE block without valve clearance problem. I'll think the 3S-FE is the same.

[Tommy]

I was always told and read on here before that you cant put the GE head on the FE. If this isnt true.....someone needs to explain how!

[Pineapple]

I believe there is a write up for 5S-GTE build up in the sticky. Also there is a few 5S-GTE running in Camry and Celica, even Corolla. The only thing is only a certain gen GE head fit a certain gen 5S block. I believe it is late GE head and early 5S block. This doesn't apply to 4A-FE to 4A-GE convertion. Only work with 5S-FE to 5S-GE convertion.

[white90dx]

Originally Posted by Pineapple

Somehow people are able to use 3S-GE head on 5S-FE block without valve clearance problem. I'll think the 3S-FE is the same.

Those people have fully custome engine internals - the GE or GTE head does not directly swap over to a motor with FE internals. Early S motors have the same water/oil passeges, later 5s motors are not compatible (and possibly later 3s motors, I'm not sure...). Also, as 88LE said, you have to be careful when mixing cranks, block, rods, pistons, etc... They don't just automatically bolt up. Also, remember that everybody that has a hybrid motor is also probably running a standalone ECU.

It CAN be done, but its not nearly as simple as just changing the head.

-Charlie

[Pineapple]

The one I know that runs great is all stock 3S-GTE top and 5S-FE bottom. You can't mix piston and crank, they just won't fit. ECU is another thing, most like stock 3S-GTE or 3S-GE ECU will work. No sensor on the block, just the head. Of course you'll need something to tune the fuel a bit.
I believe Wraith have a write up with 5S-GTE build. I think its in Carmy forum.

[Pineapple]

Here:
http://www.toyotanation.com/forum/t8316.html

[white90dx]

Originally Posted by Pineapple

The one I know that runs great is all stock 3S-GTE top and 5S-FE bottom. You can't mix piston and crank, they just won't fit. ECU is another thing, most like stock 3S-GTE or 3S-GE ECU will work. No sensor on the block, just the head. Of course you'll need something to tune the fuel a bit.
I believe Wraith have a write up with 5S-GTE build. I think its in Carmy forum.

If you are truly talking about Justin's (Wraith's) car, you are sorely mistaken about the stock 5s-fe bottom. The internals are fully re-worked. The block itself is mostly original.

Like I said, the pistons (at least) need to be changed (from the thread):

"°87.5 mm Forged pistons( basically a 5S-FE rod but with 3S-GTE top piston design) with 8.8:1CR and 5S-FE wrist pin hieght(which is stock on USspec. and J-spec. 2nd gen 3S-GTE), but you can run any compression you want. "

-Charlie

[Pineapple]

I'm not talking about his engine. The one I know was in a Corolla. Stock everything. No custom piston or any internal parts. The guy's dad is Toyota mechanic. I believe they're fitting that engine in a MR2 now.
When I was looking for a head for my 5S, his dad offer me a 3S-GE head and say just bolt it on.
I think with the bigger valve angle on GE head, the chamber is higher and the valve has more horizontal travel and less vertical travel then the FE head. The FE piston is caved and will have lower CR with a GE head which is better for turbo.

[fredk]

yes, the fe piston is dished because the chaimber in the fe head is alot smaller than the one in the ge head because the val;ves in the fe head are more straight up and down whitch makes the chaimber flatter. Yes the fe piston DESIGN is better for a turbo, but it is not strong enough to take much of a pounding, your better off getting pistons for a 3sgte and good rods or at least the rods from the gte or ge with good bolts in them