Valkyrie 370Z vs. Porsche GT3 Cup!

a.m. Brian

This is a stock VQ37 block from a junkyard, with HR heads with JWT's most aggressive drop in cams. It is just a test motor, and the goal right now is to get the chassis working right, all the complicated electronics, the gearbox, etc. So yeah we are just trying to get laps on the car right now.

We will be putting a JWT built 4.0L high compression stroker motor with flow benched heads with custom machining for giant cams, eventually. That motor will rev to 8500ish if we go with the billet crank. That is phase II of this rebuild of the car. Get it working probably and get everything we can out of the chassis, then start adding power. Ultimate goal is the 25 hours of Thunderhill, so we will always run the engine slightly conservative.

__________________
-Brian Lock

BGTV8

Sounds like my spec (I have the Bryant Racing billet stroker), but we are still fiddling with the Motec - will maybe have an installed/running engine with flat-shift for the Quaife ready for winter testing (our winter).

Rusty

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

a.m. Brian

Please let me know how that crank works out!!!

__________________
-Brian Lock

BGTV8

Brian

I can tell you that with the JWT rod/piston combo, the bottom of the piston "just" kisses that crank counter-weight and we had to machine the counterweight about 2mm to be really happy - that meant re-balancing the entire rotating assembly which cost the project some time and unplanned spend.

Apart from that, it looks mint .... the proof will be when we get it on the dyno (will run the engine first time on our hub dyno).

It is an extended process because we are fitting the Jenvey ITB (including DBW throttle motors - 1 for each bank) on the OEM engine first, before we swap engines .... so it takes time as my project is not the shop's bread and butter - I get to use quiet time in their schedule tokeep costs down - a bit like you working on a shop project which means revenue forgone rather than customer work that pays the bills.

a.m. Brian

I'd love to do ITB's, but that is probably not in the budget anytime soon. Let us know how it goes!

__________________
-Brian Lock

Elmo370z

Wait so you're doing a DWB itb set up?

BGTV8

I was convinced by Mr Motec (Richard Bendell) to stay with DBW rather than cable pull ... means we can run our own (adjustable) traction control and launch control strategies .........

So ..... now having a pair of Jenvey BDW stepper motors - one on each bank. Is more complex but ultimately better.

Project has slowed down because I am working remotely - 2000km flight on Monday, back on Friday and I am so time poor these days.

Engine is built, just needs a concentrated week to put ITB on the OEM engine and get the Motec working and then we can swap engines.