Are you the guy that has the "hp record" that z1 tuned and video'd? I thought you had eps TB's? Did you tune on them? Did you take them back off and re-tune? I personally will not be using bigger throttle bodies on my build.

With the right amount of money, anything is possible.

Austin, good to see you here. Great job on your Gridlife participation :tup:

My assumption about engine power, with a 4.0L stroker and cams, our engines can hit 400whp, but this require a lot of money and a good engine builder, and race fuel, I am entertaining the idea of trying this route to see if my assumption are right, nobody tried this route for NA build, even for FI, nobody dynoed a built engine before adding snails.

Thanks! Ended up placing 1st in the Gridlife Street class season against much higher hp cars.

For reference, the top guys I ran with this season:
Evo9 @ 360-370whp
Sti @ 370-380whp
Evo10 @ 390-400whp
M3 @ 330-340whp
My Z @ 320-330whp

The class says nothing about engine builds :stirthepot: so guess what the plans are for next season? Haha, this is why I have decided to go down this road. Plus if I ever get tired of GridLife, I can also add some slicks and aero and jump into NASA TT. GridLife street class is in for it next year if everything goes well this off season. They wont know what to do if I have the same power as they do!

Side note: comparing data to guys making only 30-40whp more than I do could gain anywhere from 1-2 seconds down the straightaways, depending on track, that I would have to claw back from shear corner speed. Maybe this extra power will allow me to not try to kill myself through the corners haha.

Yes, that's me. I did have them on there. The car would rev between shifts, it idled retarded high on startup (cold or not), and several times when I left it running to just run in a store for a drink or somthing, I'd come back out and my car would basically be 2 stepping. It would rev and hold, and then quit. Rev, hold, and quit at about 2k rpm for a couple seconds. I switched them out for my factory set that I held onto just in case due to hearing the not so good stories about these. The car has been completely flawless since.

So, long story short, yes, the record was broken with them, but no, they are no longer on the car. I couldn't tell any difference, though.

Somebody else beat my numbers and took over the NA title anyway, but I have no plans on chasing it.

Who publicly has higher numbers than you do NA? I only know of a few race teams so far, but those are all HR head swap guys.

Sam is all I know. He's from NC. RZG tuned his car, a 6MT Q. There has been some suspicion around it due to the lack of mods on the car, but I'll send it you on ig

Wow talk about bringing my old thread back from the dead. I was going through with the build, even brought the 5k to put down on the billet crank. Just not worth the money if I wasn’t going to up the compression to something that would only run race gas, and if I want to run pump 93 I would have to run some sort of stand-alone then tuning and finder a tuner to keep up with the updates swayed me
Into going boost and just running wastegate during track events

Soho did 391whp with a built motor.

Yeah I sold my pair as well, myntuner said sell now.

*w/ a 92mm stroker crank in it.

Ahhh ok, yeah 391whp is awesome! I'd be super happy with those numbers, but I'm trying to get there without going with an aftermarket crank. Custom grind C2 cams (not the off the shelf ones), imsa spec 12.5:1 high compression pistons, vk56 valves, headers, intake porting, and e85 is the plans.

In the Pirelli World Cup. Doren Racing had to change stock cranks after every race because of the crank cranking the nose in the oil pump area. The 2nd year. They was allowed to run billet cranks.

Correct. But this was due to them pushing there rpms over 8k. the harmonics and vibration of the crank around 8100 (quoted from JWT) is very stressful and causes fatigue and eventually cracks. When you have a Nissan backed budget supplying them with 10 billet cranks, who cares? I will get around this issue by staying under 8k and running a suckerpunch billet pump/gear set. Most VQ's will make peak hp under 8k anyways.

Side note: Doran is very close to me. Check out my profile image. It is one of there front bumpers straight off there Pirelli challenge car. Haha. I've got a lot of "intel" from the Doran guys on different things they experienced, parts used, and trials and tribulations to there builds.

When a rotating mass (crank) goes up in rpms. It goes through what is call a critical stage at different rpm limits. Some worse then others. You never want to operate at one of these critical stages for any length of time. A critical stage is when a shaft starts to stress it's self. Basically going from a solid shaft to a flexible shaft. It bends and bows. The stock crank has one one these critical stages just above 8,000 rpms. Doren was operating at this rpm. This is also why you see problems with the oil pumps too that had been here.