I made 996whp at 28psi of boost and 1004whp at 29psi of boost. This shows that my turbine wheel hit a limit. It was done. My high IAT's, which started to climb at 25psi, were caused by overspinning the compressor to make boost. It creates heat and that is exactly what we saw. I can correct the turbine limit by going to a larger exhaust housing which will add some lag, which I need. The only way to help the high IAT's is to run less boost. If I go back to 11:1 compression I won't have to run as much boost to get the same cylinder pressure to make the same whp.

I've got to decide if I want to chase a whp number or optimize what I have. This is going to take me a while to figure out.

All the research I have done says to go up in turbo size and keep the same .82 AR on the exhaust side. It will out perform my current turbos with the larger exhaust housing and have the same response (lag). I will gain a larger compressor wheel and correct the high IAT's also. I will also gain more whp.

Comparing to a GTR track car that has tested the G30-900's and has swapped over to the G35-900's with .61 AR. So many questions.

I read up since 10/25. Sucks to hear about the engine. I'm shocked that there wasn't a fail safe built into the tune. Oh well, not going to help now.

-edit

Also think it's cool as heck you are sharing the complete build. That's exactly what I'm doing with my LS thread on this forum too. Someone will pick out useful bits of information, and that's awesome.

No failsafe that you can write for lifting the heads. LOL It goes into the chit happens box.

I am leaning toward keeping my existing turbo's and upgrading my trans to hold more abuse. My trans has been on borrow time for a long long time. LOL, I almost forgot about the stock drive shaft. Need one of those too.

I need to do something with the trans before it eats itself. More like explodes. LMAO

The thing with an MLS headgasket is when the heads start lifting they will seal back up. They will gradually get worse and worse, then boom. If you have a pressurized coolant system you have somewhere for the coolant to go and when done it will be sucked back into the engine via the return. You will never know it until it goes boom. I was lucky this time. I caught it way before then.

I have been looking at GTR forums trying to figure out how they are getting as much WHP out of their cars with smaller turbos. The only thing I really see is they are running massive intercoolers. 6in. deep cores and 3in piping. How the heck are they making those smaller turbos work?

Most likely. You'll twist the input shaft into 2 pieces and then over rev the motor.

Driving yourself crazy.

Nah, think about it every couple of days and give it a break for a while. That's what I do.

Have you installed a driveshaft loop yet?

No, it is not a 1/4 mile drag car and I do not launch it. If I did the input shaft would break.

No joke stick shift 1/4 mile record was set.

They all run 4.5 inch intercooler cores if you look up the specs for any of the race intercoolers that's the thickness. They also run 3.5 inch intakes to the turbos 3.0-3.5 inlets from the intercooler to throttle bodies and 3.5 inch twin down pipes. They rarely run small A/R on the turbine side and choke them. This is why there are so many of them riding around with 800 plus WHP on pump 93 they have been doing this for years.

I'm not sure what you are doing for an ECU, but I know you can 100% monitor that with MS3Pro and a Rife combo sensor (pressure and temp). Then a trigger can be set to take your car to limp mode of your choosing. If you currently don't have that functionality then you may have found a great reason to upgrade.

A pressure sensor only tells you when they lift. It won't prevent it. Once they lift, they keep getting worse and worse with a MLS. No combo of ECU will prevent it. Once it is done, it is done.

Sounds like you got it all figured out. Good luck.

I have figured out what doesn't work. LOL Maybe this next step I will get it right.

I am not as good as Dylan is at SOHO on breaking chit but I am running a close 2nd place. That's for damn sure. I am ready for somebody else to take the lead on killing engines. If Dylan can't kill his engine, It should hold up to my abuse.

Only works for ls not vq, duh! :happydance:

Haltech Nexus looks promising but the ecu isn't the issue here, the bargain basement engine block we got saddled with is (my opinion). If mine goes pop again I'm going VK.

Hah, kinda sorta. I've been talking to Frank with motorvate (sp?) and he is looking to decode the BCM to make a plug and play to MS3Pro. That could open doors for people doing what ever swaps/VQ.

That reminds me... I need to poke that bear again.

I am not giving up. I got the right folks to help me push through all this BS so I can finish my build the way I want it. I have not been able to do my Motec upgrade or my transmission upgrade because the dang headlift issue.

The Haltech Nexus may be a good option instead of a Motec. Motec traction control is going to be hard to beat.

I am hoping for the best for you. I don't ever intend to chase the power level's you are at, the cost disparity between 700whp and 1k is too much for me. That and where the hell am I even going to use what I have on a 75sq mile island :rofl2:

There isn’t a plug n play available, you would have to pay someone to make. But it does have can protocols and supports the vvel.

WOW, maybe I know something you don't. That is not saying I am going that way by any means.

whats better about motec traction control vs nexus
nexus traction control suite looks pretty full featured to me


https://www.haltech.com/tag/traction-control/

dunno if advanced torque control is available on the nexus. not sure why it wouldn't be tho. maybe a license fee?

out of the box tho:

https://youtu.be/CvO-bswMwic?t=921

think there are a variety of cut methods, ignition and boost i think, not sure what others.
you can set slip table, slip % vs road speed vs gear

think you can have a trim input for multiple levels of traction control as well.

Motec has their own algorithm that takes those inputs and adjust for what to do. So NO, they are not the same.

Ordered my new Nissan heated O2's today. Want to install them this weekend if I have time. I have been procrastinating.

Sitting here twiddling my thumbs. I really did want to work on my car on my day off. I am ready to go for a drive but not with the O2's acting up.

Well, my parts delivery date got moved from today to Friday. I should get them, I hope.

My Antigravity Lithium Ion battery is still doing good. The bluetooth battery tracker is awesome. Just walk close to the car and get a battery check notification to check on the charge status.

Got my parts delivered. Yippie, guess I got some work to do this weekend.

If anyone wants the Antigravity kit that comes with a the bluetooth tracker and a CTEK battery tender for a Lithium battery. Get with CJ Motorsports. Phunk can help you out. It is so silly but I do enjoy it. I never have to worry how my battery is doing when the car is parked for a while. I need to add it is only 8lbs.

The original singer, Steelheart was the band. Miljenko Matijevic was a great singer in the early 90's until a stage accident. The set fell on his head and he was gifted with a brain injury. He is not as good as he once was but to be in his 50's and still be able to sing like this is nuts. I have the original Steelheart CD in my collection. He sang this song on "The Rockstar". Yes, it was him.

Finally found a dyno graph for a Fast Intentions kit with the Stage 3 turbos. Carbon Z's car. It is a 4.0liter but I can see enough where I think they will work perfect and hump out 1100 to 1200whp without too much trouble and no more lag than we tuned into my car on purpose at 1004whp.