jgkurz

My block is O ringed and I use an OEM Nissan head gasket. I have had no issues since the engine was built about 5 years ago. The engine has seen as much as 26psi boost on race gas.

363rwhp at 15psi must be fun to drive. Congrats on a great build. As for the GT35R, I'm not sure there is a better turbo that can still support 600hp.

Happy Birthday Ron!

Nice job Hugh. I knew your car could go way faster than 15.5. I can't wait to the see the improvement that all your upgrades will make.

This is me throwing you a "virtual" party. Happy birthday...!

Wow! peak power at 6800 with an L6. That's impressive. You must have some decent head work done. Do you have a custom intake?

Excellent advice. Thank you everyone for your responses.

Stunning car!!!!!! The red is beautiful. The best part is under the hood... I agree with lowering it a bit to finish off the look.

I called Porterfield and they want 175.99 for the R4 front Toyota S12W pads. Wow... My rear 240SX pads will likely be in the same ball park. I think I'll pass on a purchase and just run some cooling ducts.

Update: I have started correspondence with SSAC on arranging shipment and payment. He seems to be under the impression that he is selling all the Group Buy headers to a retail shop for resell to HBZ. At least that's my first impression. Also, he will be needed some guidance on how to design the header and what options it should have. Unfortunately this all may be a mute issue. After taking some more time looking at clearances and measurements, I've come to the conclusion that my header needs MAJOR modifications to ever fit non-tube chassis S30. To work properly, the flange cannot simply be moved closer to the block without ruining the merge collector. The S130 would not even be close to fitting at his point. I can't in good conscience send the header to SSAC knowing that it is not an accurate template for what this group has/is desiring. This is a major bummer for me as I'm out $800.00. on good faith that the header would fit. My only recourse is to spend an estimated $200.00 to $300.00 to have the header re-worked to hopefully fit my car. I'm still willing to send the header to SSAC but I don't see how this helps anyone. If someone has a different take on this mess then I'm all ears....

Ok, I did some more reading on the Porterfield site and apparently they can make custom pads. I doubt they could do anything before next Friday but If they can I think the R4 or R4-1 might be a good choice. I don't have any extra cooling mechanisms for keeping the brakes cool so I expect to be running quite hot on the track. Anyone have an opinion of either the R4 or R4-1 pads?

Hi folks, I run the Toyota S12W calipers on my Z with Z31 vented rotors. On the street I use Porterfield R4S pads and have been very happy with their performance. I am attending a track day with my car next Friday and would like to temporarily install some much higher temp pads. Porterfield and Hawk do not have any pads above the R4S. It seems that because these calipers were originally used on a truck that no one really offers track pads. Any ideas where I could buy some racing pads for the S12W calipers? Thank you!

So I guess that means my aluminum fuel rail will have to go....?

I just bought a Stant 20psi radiator cap for just these reasons...

Thanks... No wonder I couldn't find it using keyword 20psi.

Tony, I searched for for John Coffey's comments on a 20psi cap but found nothing. Can you post the thread? I run the LD28 water pump and have no issues that I'm aware of. Next Friday I'm going to take the Z out for a track day but with the boost set on stun rather then kill. I'm worried about cyl #5 and 6 under sustained boost. Maybe the 20psi cap would keep flow moving in the head better then my 13psi cap?

I added three more pics with descriptions to the main album (48,49 & 50). I doubt if I got all the measurements you requested. After reading your request over and over I wasn't positive what you were asking. If you are dying to get more measurements then I'll take some more pics but I'd like to be done for now.

I'm willing to send the header to SSAC after my modifications are complete but I can't make a commitment to a completion date. Due to other non-Z priorities it could take months before I get the work done to my satisfaction. Also, if I wait to send the header I risk SSAC not being interested compensating me. Another note, I will likely keep a T4 flange on my header even if I modify the flange location. The pipes merge into a collector like area that is much larger then a T3 flange. A new header might not have this issue if it's designed for a T3 flange right out of the gate.

He never tried it out, although it looks like it had been used at some point. The good thing about it is the welds and material are seriously heavy duty. The pipes almost feel like cast iron. I plan to modify the turbo flange so that I can fit at Garrett BB turbo, probably the new HTA GT35R. After measuring several times, I'll just cut off the old flange with some unknown length of pipe then TIG on the new turbo and wastegate flanges.

Of course. I'll work on that ASAP.

What I'm trying to figure out is what T4 turbo was used when the header was built? Even if the header was used on a right hand drive car there still would be fender issues. Maybe a larger T4 would barely fit since it would be mounted slightly higher then the T3. The A/C hose and brake switch would need to be relocated as well. I provided a photo with the block to flange measurement but I hesitate to make a dimension recommendation.

Does the group still want me to still try and find an S130 or should I arrange to send the header to SSAC now?

It should fit with some minor modifications. The Group Buy header will just need to have the turbo flange moved closer to the block. Also worth considering is that I mounted the T3 in a worst case mounting position and it still has "just enough" clearance. The header has a much larger T4 flange so the bolts don't line up with the T3. It really shouldn't be a big deal to make some design changes. Does the Holset use T4 or T3 flange?

Remember the turbo I used in the pictures is a T3 not a T4. The larger T4 flange on the header allows either the T3 top two bolts or the bottom two bolts for mounting. I chose the bottom two for the pics. If the top two are used it would bring the turbo up about a half inch. Fitament will all depend on how SSAC welds the flange. I'd suggest having SSAC move the flange up and in to accommodate the larger compressor housings. On a different topic, I have to laugh a bit about trying to fit a tuned turbo header in these cars. My header is a compact design that still is tight. Earlier in this thread there were some folks who wanted the group buy header to be tuned with equal length pipes. It's clear to me that you'd have to seriously hack up your car to make that work.

Go to my main album here: http://s362.photobucket.com/albums/oo64/jgkurz/ Then on the left side click on "L6 Turbo Header", then click on "S30_L6 Header" I'd have to mock it up on an S130 to say for sure. Are you voting to wait for S130 pics before I send to SSAC?