Jim Wolf Cam testing for the VQ37VHR -- Results inside!

jrb55gh · 09-24-2015, 10:17 PM

I notice in the 2012 service manual that the bank 2 exhaust cam has about 1.7mm more lift than bank 1. Do these cams have a similar lift difference for bank 1 and bank 2?

Edited typo on cam lift.

DR_ · 09-25-2015, 11:07 AM

This is great news as I don't want to raise the rev limiter too much past 7.5k RPM.

MAMotorsports · 09-25-2015, 11:09 AM

Quote:

Originally Posted by jrb55gh

I notice in the 2012 service manual that the bank 2 exhaust cam has about 1.7mm more lift than bank 1. Do these cams have a similar lift difference for bank 1 and bank 2?

Edited typo on cam lift.

That is strange, the JWT units are identical side to side but let me talk with them and see about this. There have been some weird changes to these motors over the years.

-Daelen

Elmo370z · 09-25-2015, 12:59 PM

Quote:

Originally Posted by DR_

This is great news as I don't want to raise the rev limiter too much past 7.5k RPM.

You shouldn't raise the rev limiter for any reason, the oil pump isnt efficient padt 7500 rpms

Seb@SZ · 09-25-2015, 03:27 PM

Quote:

Originally Posted by Elmo370z

Ipp talk to kyle. You just have to buy built heads

I'm sure the price Kyle quoted is if you give him the heads off the motor already. This is just machining costs and assembly of just the heads. Not actual tear down and reinstall.

Elmo370z · 09-25-2015, 03:41 PM

Quote:

Originally Posted by Seb@SZ

I'm sure the price Kyle quoted is if you give him the heads off the motor already. This is just machining costs and assembly of just the heads. Not actual tear down and reinstall.

Yup sorry i didn't add that.

imjello · 09-25-2015, 04:00 PM

sub

MAMotorsports · 09-25-2015, 04:18 PM

Have tried to keep up with all the PMs and everyone should have a response! Let me know if you have any other questions as I am more than happy to answer!

This is a huge step in the right direction with these motors and I am excited to keep going.

-Daelen

PongSanity · 09-25-2015, 04:31 PM

a very worthwhile mod. would look into this whenever the time comes for a motor rebuild.

1slow370 · 09-26-2015, 01:17 AM

There isnt more lift on one side of the head, the cam is offset on the bucket and runs at a different ratio in order to retain the same timing equipment as previous vq engines. It was cheaper for nissan to make one different cam than to make all new length chains and alter the disign of the block. The vvel is different on each head for the same reason one appears to have more lift than the other. But is actually the same at the valve. Also @ MA Motorsports whats up ray?(unsure who's managing forum duty) i spoke with you a few years ago at the FD of long beach when the shiz happened with essa. Had a bunch of life crap happen. Im working on a new vk56 project will call the shop next week.

1slow370 · 09-26-2015, 01:26 AM

Edit: also at seb my old car is still holding strong with the drysump and ati balancer new owner may be interested in doing 500bhp 9000rpm. Im doing a custom rpm rollbar in it(which fit like **** btw) and i know we already have the airflow so i will give you a call next week as well. hes out your way in ojai and i am way too busy to do it.

Seb@SZ · 09-26-2015, 11:29 AM

Quote:

Originally Posted by 1slow370

Edit: also at seb my old car is still holding strong with the drysump and ati balancer new owner may be interested in doing 500bhp 9000rpm. Im doing a custom rpm rollbar in it(which fit like **** btw) and i know we already have the airflow so i will give you a call next week as well. hes out your way in ojai and i am way too busy to do it.

Sounds good. Hope all is well.

lj909 · 09-26-2015, 01:05 PM

Quote:

Originally Posted by 1slow370

There isnt more lift on one side of the head, the cam is offset on the bucket and runs at a different ratio in order to retain the same timing equipment as previous vq engines. It was cheaper for nissan to make one different cam than to make all new length chains and alter the disign of the block. The vvel is different on each head for the same reason one appears to have more lift than the other. But is actually the same at the valve.

So your saying that the CAMS ARE ACTUALLY different and this needs to be taken into account by aftermarket?

MAMotorsports · 09-28-2015, 11:17 AM

Quote:

Originally Posted by 1slow370

There isnt more lift on one side of the head, the cam is offset on the bucket and runs at a different ratio in order to retain the same timing equipment as previous vq engines. It was cheaper for nissan to make one different cam than to make all new length chains and alter the disign of the block. The vvel is different on each head for the same reason one appears to have more lift than the other. But is actually the same at the valve. Also @ MA Motorsports whats up ray?(unsure who's managing forum duty) i spoke with you a few years ago at the FD of long beach when the shiz happened with essa. Had a bunch of life crap happen. Im working on a new vk56 project will call the shop next week.

Spot on, and this is Daelen but I will get the message over to Ray! Holler if you need any VK info, we are always working on some fun stuff with those.

Quote:

Originally Posted by lj909

So your saying that the CAMS ARE ACTUALLY different and this needs to be taken into account by aftermarket?

Jim wolf is very aware of the situation and this was taken into account. The OE measured the lift from the "base circle" of the cam, and JWT based the design off that also. So the lift/duration does not vary from side to side but the base circle will, the same as the OE. All due to the VVEL system and how Nissan set up the heads.

MAMotorsports · 09-28-2015, 11:35 AM

Also just for future search's:

For the DLC coating on the cam buckets, the 2009 model year for the G7 and 370Z was the only year that some cars came with a motor that did not have the DLC coated exhaust cam buckets. These will need to be purchased to do the install due to how the cams are designed tolerance wise. So make sure you or your installer are aware of this when opening the heads.

These are a mild 263* cam, so as you can see we have more room to make some power with a cam that is more aggressive.

09-24-2015, 10:17 PM	#46 (permalink)
jrb55gh Base Member Join Date: Mar 2013 Location: DFW Texas Posts: 149 Drives: '13 370z black 7AT Rep Power: 12	exhaust valve lift I notice in the 2012 service manual that the bank 2 exhaust cam has about 1.7mm more lift than bank 1. Do these cams have a similar lift difference for bank 1 and bank 2? Edited typo on cam lift. Last edited by jrb55gh; 09-25-2015 at 08:40 AM.

09-25-2015, 04:18 PM	#53 (permalink)
MAMotorsports Track Member Join Date: Jul 2015 Location: Glen Arm, MD Posts: 872 Drives: 370Z Rep Power: 17	Have tried to keep up with all the PMs and everyone should have a response! Let me know if you have any other questions as I am more than happy to answer! This is a huge step in the right direction with these motors and I am excited to keep going. -Daelen chuckie311 likes this. __________________ Daelen @ MA Motorsports MA-Motorsports.com https://www.facebook.com/pages/MA-Mo...C/125379858828

09-26-2015, 01:17 AM	#55 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	There isnt more lift on one side of the head, the cam is offset on the bucket and runs at a different ratio in order to retain the same timing equipment as previous vq engines. It was cheaper for nissan to make one different cam than to make all new length chains and alter the disign of the block. The vvel is different on each head for the same reason one appears to have more lift than the other. But is actually the same at the valve. Also @ MA Motorsports whats up ray?(unsure who's managing forum duty) i spoke with you a few years ago at the FD of long beach when the shiz happened with essa. Had a bunch of life crap happen. Im working on a new vk56 project will call the shop next week. jrb55gh and lj909 like this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

09-26-2015, 01:26 AM	#56 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	Edit: also at seb my old car is still holding strong with the drysump and ati balancer new owner may be interested in doing 500bhp 9000rpm. Im doing a custom rpm rollbar in it(which fit like ** btw) and i know we already have the airflow so i will give you a call next week as well. hes out your way in ojai and i am way too busy to do it. __________________ ANSWER PRICE LIST** Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

09-28-2015, 11:35 AM	#60 (permalink)
MAMotorsports Track Member Join Date: Jul 2015 Location: Glen Arm, MD Posts: 872 Drives: 370Z Rep Power: 17	Also just for future search's: For the DLC coating on the cam buckets, the 2009 model year for the G7 and 370Z was the only year that some cars came with a motor that did not have the DLC coated exhaust cam buckets. These will need to be purchased to do the install due to how the cams are designed tolerance wise. So make sure you or your installer are aware of this when opening the heads. These are a mild 263* cam, so as you can see we have more room to make some power with a cam that is more aggressive. synolimit likes this. __________________ Daelen @ MA Motorsports MA-Motorsports.com https://www.facebook.com/pages/MA-Mo...C/125379858828

09-25-2015, 11:07 AM	#47 (permalink)
DR_ Track Member Join Date: Jul 2009 Location: Dallas Posts: 981 Drives: Touring/Sport M6 PG Rep Power: 17	This is great news as I don't want to raise the rev limiter too much past 7.5k RPM.

09-25-2015, 04:00 PM	#52 (permalink)
imjello Enthusiast Member Join Date: Nov 2014 Location: texas Posts: 285 Drives: F80 M3, S5 B9 Rep Power: 13	sub

09-25-2015, 04:31 PM	#54 (permalink)
PongSanity Enthusiast Member Join Date: Jul 2014 Location: Virgin Islands Posts: 261 Drives: '09 G37s KH3 6MT Rep Power: 11	a very worthwhile mod. would look into this whenever the time comes for a motor rebuild.

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