radianation

See, that's what I'm scratching my head about. The concept of the different turbo is only one suggestion. Other things we've discussed is upgrading the valve springs and trying to get a higher redline? Maybe running E85 fuel conversion? This is kind of a newbie question and I'm sad to ask it, but if I go to a 3.5" exhaust should I match that with the exhaust housing on the turbo? Looks like the housing I was going to choose had a 3" vband out. BTW - Fuel seems to be there right now with no signs of slowing down anytime soon?

421.3 HP / 314.16 KW @ 20 PSI 93 octane pump gas RB25DET (R33 Series 2) powered S14 240sx Wiseco 20 over forged pistons Eagle Rods ACL bearings ARP studs Cometic HG Tomei Poncams 256 8.5 Tomei adjustable exhaust camwheel Bullseye S362 Turbo Custom 3" Exhaust Greddy Intake w/Q45 TB Lovefab Exhaust manifold HKS GT-II 60mm wastegate HKS SSQV BOV LS2 Truck Coil Conversion Denso 850cc Injectors Nismo FPR Walbro 255lph pump 300zx Fuel Filter AEM EMS and More...

Suspension work is getting there, but not complete. Coilovers, polyurethane bushings, sway bars, ruca, tension rods, etc. upgraded the brakes and wheels/tires too. Not 100% where I want it, but it handles great and I can drive it with the throttle mostly at auto-x (obviously not for circuit racing hehe) I just need to be able to find a GTX3076 with a cover?? Looks like Garret assumes you'll use your existing one? ***edit** I found the housings. I see you buy them separate.

Yep. I am aware of the differences in numbers, but since I've always had tuning done on Dyno Dynamics I want to stick to that as my benchmark. The car feels great, but I think it could be better. I have a hard time comparing it to anything? I have a 370z nismo that has a lot more torque feeling, but no high end power.

Yes, I definitely do *not* mean illegal street racing. I have been doing auto-x for a few years to get a better understanding of my car, and I'm looking to do some HPDE track days this coming year for fun and hopefully get into the sport competitively within 2-3 years once I have more experience. My original power goal was around 550rwhp, and while the car drives absolutely fantastic right now.... I think that hitting that goal is more of a personal challenge. I'd love to find a turbo that has the best of both worlds. I'm going to do some research on the turbos you have recommended. And yes, that S362 is very capable of making the power (I've seen it on a 2JZ), but it seems the RB doesn't flow enough to get me where I need to go with this turbo?

I've been told that I have a turbo that is a bit too large for my (mostly) built RB25DET because it doesn't produce power until higher in the curve. Can anybody give me some additional opinions and insights on the comparison between a Bullseye Power S362 .70 A/R and a Garret GT35R .82 A/R? It looks like the S362 (what I currently have) doesn't really start producing power until the RB is out of RPMs. I'm only hitting around 421 rwhp with this turbo, but I would like to hit 550rwhp. Any help is appreciated. I'm looking for the ideal turbo choice for this engine. I plan on doing road racing...

Thank you for the warm welcome. I am posting a pic of my engine bay and the outside of the car below.

Hello from Louisville, KY / USA. I currently own an S14 240sx with a fairly modified R33 RB25DET S2 motor (almost 3 years now). I previously had an R32 RB20DET stock motor in this car (4 years ago). Oh, and I am the original owner of my S14. Swapped the motors when the KA24DE failed. I'm trying to build my motor to achieve 550RWHP on a Dyno Dynamics using pump gas, but I'm hitting some limitations (currently @ 412psi). I'm coming to this forum because it seems that the amount of "technical support" for this motor is lacking in the US. I hope you'll welcome me, even though my engine sits in an S chassis. =)

True. The comparison dyno chart was not made specifically to test the camshafts, and my other adjustments make it hard to determine what's accurate. If you're not going for big power then you might want to skip on them, but I've not yet hit my goals so they are a step in the right direction. Again, I hope it helps you make a decision either way. Obviously, you've used my chart to show that there is no reason to upgrade so it's worth something? ; )

I saw a mild gain after installing Tomei Poncams on S2 RB25DET. I retained VCT on the intake cam. I did some pulls with/without VCT on and the low/mid torque and spoolup times were significantly different, justifying keeping VCT in my situation. The cams really seem to open up the RB25DET head for further upgrades. The install is not terribly difficult and if you plan on doing more in the future go ahead and upgrade your valve springs while it's out so you can increase your redline. I'm going back to do that now. Blue line = After Camshaft @ 20 PSI (and smaller exhaust housing on turbo hence quicker spool) Red line = Before Camshaft @ 18 PSI I hope this helps you in your decision. I'm pleased with the upgrade.

I upgraded to LS2 Truck Coil Packs. No more ignition problems and they outperform the others.

421.3 HP / 314.16 KW @ 20 PSI 93 octane pump gas RB25DET (R33 Series 2) powered S14 240sx Wiseco 20 over forged pistons Eagle Rods ACL bearings ARP studs Cometic HG Tomei Poncams Tomei adjustable exhaust camwheel Bullseye S362 Turbo Custom 3" Exhaust Greddy Intake w/Q45 TB Lovefab Exhaust manifold HKS GT-II 60mm wastegate HKS SSQV BOV LS2 Truck Coil Conversion Denso 850cc Injectors Nismo FPR Walbro 255lph pump 300zx Fuel Filter AEM EMS and More...