Build up 5sfe, what to do Options

[Anub1s]

Hey all!

I am starting my new engines class on Oct 19 and found out that I have to put an engine together for THE project in that class. I decided that I would like to just build up a 5sfe. I've been thinking about going F/I but I would rather keep it N/A. I was wondering what everyone else thought about this. I have noticed a lot of people turboing theirs but there are not to many people that have just built up the internals for more h/p. What is everyone's thoughts on this and also what setup would you recommend (parts, compression ratios, brands, item #'s etc.) I've been searching and researching everything needed for this and have come up with some ideas but would like to get some input on this.

Thank you all for the help.

[shid]

search search search. it's been discussed before on threads that got to 5 or 6 pages.

[Anub1s]

DONE THAT I didn't find what I wanted. God.... I;ve told people to search myself don't you think I would have done that?!!?!?! Not to mention you obviouly didn't read the whole post.. so if you decide to be a dick please keep your comments to yourself.

And let me clarify something. I am thinking of doing a GE head swap to help with increased compression ratios and what I need to do with the bottom end I am just wondering what is recommended and what brands I should be looking for.

This post has been edited by Anub1s: Aug 28, 2004 - 6:05 PM

[Kwanza26]

I guess I'll post about it again... ;]

Ummm... the 5SFE will not make a ton of horspower... but there is power to be made. The head can be ported and milled to some degree and flow can be increase in the head at the expense of low-end torque. Being an oversquare motor, the 5SFE will not make a lot of horsepower in the top-end because it lacks the ability to revv. What should be concentrated on should be making power where the engine makes it best... in the mid-range by increasing overall compression, and induction ability.
There is plently of low-end torque, so horsepower modifications can sometimes eat away at the low-end numbers, but give and take... that's how you build n/a. As for piston choices, I believe there may be some, but chances are you're gonna have to go custom. You can always mill the head to increase compression... and things like that, but a set of pistons will be the best bet. I don't know of anyone making pistons that may work. 1MZFE pistons *might* work... but might require custom wrist pins and boring the block. I could see around 10:5:1 compression on the pistons with a milled head with proper valve clearences... but beyond that, you're looking at getting high-comp pistons.
Induction will have to be improved also, if you're looking at increasing compression. Larger sized valves will be wanted/needed... I forget the exact size of the 5SFE valves, but basically try and source some slightly larger ones... a few mm or so. Slide those in, with some upgraded valve springs and retainers and you should be good. A good port and polish with a 3 angle valve job would be good also. All of that is done so you can best utilize camshafts. Get a custom ground set under 280 degrees duration and less than 8.5mm lift... otherwise you'd be in danger of valve float... even with upgraded springs. Slap that together and tune the motor... and you should be good for at least 20-30+ hp at the wheels...

NOTE: Easier said then done... ;]

good luck

[Anub1s]

lol so basically you are suggesting a turbo set up? I appreciate the re-post there kwanza your the best... sorry I guess I just didn't search hard enough to find it. hmm...... makes me think. Anyone else for suggestions? Almost anything is appreciated.

[Junior]

If you're going with a ge head swap, you're better getting a 3sge motor and using 5sfe parts. You'll have to bore out a little, I think it's 1mm. using 5sfe connecting rods with the crank will increase the stroke. Now you have a 2.2 3sge. Balance the bottom end and if you wanna spend the money get new pistons and connecting rods. I suggest 12:1 compression. Port and polish the head, throw in some new cams. There is so much to do, but I would bother with the 5sfe block and a ge head. The blocks are basically the same, just different stroke and bore.

[shid]

[Anub1s]

[Kwanza26]

[recneps]

as for the valves people usually use 1mm oversized (2jz). i know a guys selling them for 100 (a deal). a saw some post on the mrs forum where a guy got 7 hp to the fly with them. he had a couple of other mods though.