5sfte Valve's?, Peformance preffered Options

[NeverBeGosu]

I heard the 3sgte valves work in the 5sfte build but I was hoping for something a little more performance wise. Anyone have experience with this? Wanting at least 350 hp.

[NeverBeGosu]

cuase I want to be different and its fun, and it will be one of a kind if not just very few.

Anyways, looking at some numbers here should I lower my compression to 8.5:1 if im planning on boosting?

Choosing the right Static Compression Ratio is dependent on your goals. Is this gonna be driven daily? Track-only? A mix of both? What octane/alternative fuel will you be using?

I'm going to run stock 9.5:1 compression ratio. New turbocharged engines come with 9.5:1 static compression. I find it's the best compromise in "low" CR and off-boost drivability. The lower your static CR, the more of a slouch the car will be off-boost, but the more boost you can run "safely" (I put it in quotation marks because this is where fuel comes into play)

3SGTE engines come with 9.0, 8.8 and 8.5:1 compression ratios, and some engines have come with as low as 7.5:1 CR in the past (Hyundai Scoupe)

If you're gonna be running on E85, you can run 9.5:1 CR and tons of boost very safely, vs running 91 octane and lots of boost. It all depends on how you want the car to behave. Static CR also directly impacts turbo spool time, which is something else to take into consideration. (lowering CR to use a huge turbo kinda hits hard on spool time, so a dual ball bearing garrett or precision turbo unit is recommended, for example)

Gonna be running on 91 oct
Thinking of running the 8.5 compression. I really don't care how fast it is in the low gears/rpms but really want to be able to have some upper end. So I think the 8.5 will allow more boost for the engine. So I will probably have to go with a dual ball bearing garrett. Any recomdations on the turbo? again looking for 350 easy and room for more if wanted. The block will handle it with all the forged internals. (I hope

The car is going to be a show, and also a trip car for when I drive distances over a few hours. I like know it sounds dumb, but that's what I want. I don't do the track, nor do I street race, but would like to be able to pull away from the gt's out there. I think 350 hp is plenty enough for the street, if even a little to much, but like I said, I am looking for more control high end then I am early. So will the compression being lower, and my valves selected/along with the 5sfe pauter rods and the springs, be able to get me better high end? Even move the redline to the right a little?

Like I said guys, I am very humble and thank you all for the support and knowledge. Its a dream, but I only have the time and the money, and you all have the knowledge.

[Syaoran]

Gonna be running on 91 oct
Thinking of running the 8.5 compression. I really don't care how fast it is in the low gears/rpms but really want to be able to have some upper end. So I think the 8.5 will allow more boost for the engine. So I will probably have to go with a dual ball bearing garrett. Any recomdations on the turbo? again looking for 350 easy and room for more if wanted. The block will handle it with all the forged internals. (I hope

The car is going to be a show, and also a trip car for when I drive distances over a few hours. I like know it sounds dumb, but that's what I want. I don't do the track, nor do I street race, but would like to be able to pull away from the gt's out there. I think 350 hp is plenty enough for the street, if even a little to much, but like I said, I am looking for more control high end then I am early. So will the compression being lower, and my valves selected/along with the 5sfe pauter rods and the springs, be able to get me better high end? Even move the redline to the right a little?

Like I said guys, I am very humble and thank you all for the support and knowledge. Its a dream, but I only have the time and the money, and you all have the knowledge.

If you're gonna be on 91, I recommend a 9.0:1 or 8.5:1 static CR. It'll help control pre-ignition a little better.

The thing about lower compression is makes you lose power down low, which means more gas wasted than before and less willingness to go up a hill off-boost. It's not about track or street race and, as a matter of fact, I would actually try to keep as high a compression ratio as possible if it's gonna be just a cruising car. I don't really get why you would want a low compression, 350whp car if you're never gonna race it.

As for headwork, you'll need cams more than valves like I mentioned before. Cams are the most important mod on the 5S-FE head to unleash true potential. Webcams 294 cams allow you to retain stock shim-over buckets, stock springs, retainers and valves and they let you have a higher redline while at it.