Valkyrie 370Z vs. Porsche GT3 Cup!

a.m. Brian · 03-24-2017, 02:40 PM

Thought I'd share this here since a lot of folks have been following this build for year. Well it's finally done, and done right! Still needs the big motor, this is a test motor which is mostly stock except for JWT cams and a dry sump.

Valkyrie 370Z vs. Porsche GT3 Cup!

GaleForce · 03-24-2017, 04:51 PM

Nice!

TerribleONE · 03-24-2017, 04:56 PM

BGTV8 · 03-24-2017, 07:09 PM

Are you running HR heads or VHR heads Brian ............... rev limits seems conservative but that comes with a 3-hour race I suspect ........... BUT very well done

a.m. Brian · 03-24-2017, 08:12 PM

Quote:

Originally Posted by BGTV8

Are you running HR heads or VHR heads Brian ............... rev limits seems conservative but that comes with a 3-hour race I suspect ........... BUT very well done

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.

KE_1508 · 03-24-2017, 08:17 PM

Subbed.

TreeSemdyZee · 03-24-2017, 08:18 PM

Quote:

Originally Posted by a.m. Brian

Thought I'd share this here since a lot of folks have been following this build for year. Well it's finally done, and done right! Still needs the big motor, this is a test motor which is mostly stock except for JWT cams and a dry sump.

Valkyrie 370Z vs. Porsche GT3 Cup!

This should help

BGTV8 · 03-25-2017, 05:46 PM

Quote:

Originally Posted by 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.

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 · 03-25-2017, 11:37 PM

a.m. Brian · 03-27-2017, 01:40 PM

Quote:

Originally Posted by 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).

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

Eagle · 03-27-2017, 04:36 PM

Project Shamu lives!!!

BGTV8 · 03-28-2017, 04:50 AM

Quote:

Originally Posted by a.m. Brian

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

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 · 03-30-2017, 02:35 PM

Quote:

Originally Posted by 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.

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

m13s · 04-07-2017, 07:44 AM

that is great!

Elmo370z · 04-09-2017, 11:58 AM

Quote:

Originally Posted by 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.

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

03-24-2017, 02:40 PM	#1 (permalink)
a.m. Brian Base Member Join Date: Dec 2010 Location: Scotts Valley, CA Posts: 55 Drives: Valkyrie 370Z Rep Power: 14	Valkyrie 370Z vs. Porsche GT3 Cup! Thought I'd share this here since a lot of folks have been following this build for year. Well it's finally done, and done right! Still needs the big motor, this is a test motor which is mostly stock except for JWT cams and a dry sump. Valkyrie 370Z vs. Porsche GT3 Cup! chubbs, phunk, Trips and 24 others like this. __________________ -Brian Lock Last edited by Trips; 03-24-2017 at 08:20 PM.

03-24-2017, 04:51 PM	#2 (permalink)
GaleForce A True Z Fanatic Join Date: Aug 2011 Location: Ontario, Canada Posts: 21,749 Drives: Varis Arising II Rep Power: 51865	Nice! __________________ >>>GaleForce's Build<<< >>>FaceBook @3GsCustoms<<<>>>Instagram @GaleForce370z<<< Varis Kamikaze-Z

03-24-2017, 04:56 PM	#3 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5850	__________________ 638WHP 541WTQ @ 13.5PSI Build thread

03-25-2017, 11:37 PM	#9 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,180 Drives: 2011 Nismo GM 6M Rep Power: 2684437	__________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

03-27-2017, 04:36 PM	#11 (permalink)
Eagle Track Member Join Date: Jan 2011 Location: South Orange County, CA Posts: 885 Drives: 2011 370z Red 6MT Rep Power: 10656	Project Shamu lives!!! cv129 and Rusty like this. __________________ nismo\| EVO-R High Wing \| *Stillen* Gen 3 CAI \| SEIBON TS Hood \| Z1 34 Row Oil Cooler \| VMR 810 Wheels \| Endless MX72 Pads \|*Sabelt* GT-140 Seat \|Fly1Motorsports RS1 Fenders \| Hotchkis Front Sway Bar \| Berk HFC \|

03-24-2017, 07:09 PM	#4 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39973	Are you running HR heads or VHR heads Brian ............... rev limits seems conservative but that comes with a 3-hour race I suspect ........... BUT very well done

03-24-2017, 08:17 PM	#6 (permalink)
KE_1508 Base Member Join Date: Dec 2016 Location: AZ/GA Posts: 72 Drives: 08 Nismo 350Z # 1508 Rep Power: 8	Subbed.

04-07-2017, 07:44 AM	#14 (permalink)
m13s Base Member Join Date: Dec 2016 Location: MA Posts: 49 Drives: 2009 370z Rep Power: 8	that is great!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
NASA West Coast Champs - Valkyrie Autosport 370Z In-car	a.m. Brian	Track / Autocross / Drifting / Dragstrip	13	12-03-2014 04:03 PM
The Valkyrie 370Z lives on! Testing this weekend at Sonoma Raceway	a.m. Brian	Track / Autocross / Drifting / Dragstrip	20	11-10-2014 02:06 PM
Honda S2000 vs BMW 135i vs Nissan 370Z vs Porsche Cayman S vs Porsche 911	JvKintheUSA	Nissan 370Z Photos / Spyshots / Video / Media Gallery	2	08-04-2009 02:48 PM