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

ban25 · 07-24-2016, 05:28 PM

Quote:

Originally Posted by brucelidat

I'm assuming you have the stage 1 cams How does the engine sound? Is there that 'lobe lobe lobe' noise some cars with cams have? a video with audio when it's all done would be great if possible.

Stage 1, yes. It definitely has a different character to it, I'll post up a video along with a full write up about the build soon.

Slartibartfas · 07-24-2016, 08:08 PM

'lobe lobe lobe'

I've heard lumpy idles called many things, but never that!

brucelidat · 07-24-2016, 08:33 PM

i didn't really know how to describe it, but someone else called it that and it stuck, haha. We were commenting on the idle sound from 1slowz's super NA build that had jun cams, a dry sump, custom manifold and other stuff.

BGTV8 · 07-24-2016, 09:33 PM

The term is "cam lope" used by old-school engine builders to describe the characteristic variation in sound of an idling engine with big lift and significant overlap cam timing.

Mr Google ..........

Cam “lope” is caused by the overlap when the exhaust valve is opening and the intake valve is closing. The more of an overlap, the longer and lower the sound of the “lope” will be. This is usually a result of a longer exhaust duration.

brucelidat · 07-25-2016, 12:25 AM

so how do the final drive gears skew dyno numbers? I have 4.08s

abm89 · 07-25-2016, 11:01 AM

Quote:

Originally Posted by brucelidat

so how do the final drive gears skew dyno numbers? I have 4.08s

Your RWHP will read lower with a higher final drive. Of course that's assuming the pulls you are comparing are done in the same gear.

brucelidat · 07-25-2016, 12:11 PM

I believe my runs were done in 5th because of the gears. Are cars usually run in 4th?

Slartibartfas · 07-25-2016, 04:44 PM

Runs are usually in the gear that is closest to 1:1.

abm89 · 07-25-2016, 06:08 PM

5th is 1:1 with the 3.69 Final drive (stock 6MT)

Elmo370z · 07-25-2016, 07:18 PM

I thought 4th is 1:1 (3.69)5th would read higher mumbers.

DEpointfive0 · 07-25-2016, 07:34 PM

Quote:

Originally Posted by Elmo370z

I thought 4th is 1:1 (3.69)5th would read higher mumbers.

5th for auto AND manual

Elmo370z · 07-25-2016, 08:53 PM

Weird, guess different tuners dyno different. Ive ashtrays heard 4th.

brucelidat · 08-18-2016, 01:17 AM

Any update from ban25?

ban25 · 08-18-2016, 01:02 PM

Quote:

Originally Posted by brucelidat

Any update from ban25?

I'm driving it around -- just hit 400 miles on it. Hope to get another 300-400 this weekend, then do an oil change and tune for 100 octane. At that point, I'll have dyno numbers for everyone.

General impressions so far: the idle is a little rough, but honestly not bad at all. It has an aggressive character that, combined with the LTHs and Bassani exaust produce a very nice tone. The car has lots of torque, we had to reduce the throttle mapping a bit in 1st and 2nd to make it more manageable. Here's a first drive video:

I'm looking at 9/5 for the first track day, at Laguna Seca.

Spooler · 08-18-2016, 09:53 PM

Sounds good. I wonder what it sounds like in the 7K RPM range. Guess we will have to wait and see after the break in process.

07-24-2016, 08:08 PM	#2 (permalink)
Slartibartfas Track Member Join Date: Apr 2016 Location: Houston Posts: 551 Drives: 2011 G37S sedan Rep Power: 12	'lobe lobe lobe' I've heard lumpy idles called many things, but never that! __________________ 2011 Journey Sport sedan 7AT \| SPL front, SPC rear camber arms \| ARK Grip cat-back \|

07-24-2016, 08:33 PM	#3 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	i didn't really know how to describe it, but someone else called it that and it stuck, haha. We were commenting on the idle sound from 1slowz's super NA build that had jun cams, a dry sump, custom manifold and other stuff. __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

07-24-2016, 09:33 PM	#4 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,516 Drives: 09 Nissan 370Z M6 Rep Power: 39975	The term is "cam lope" used by old-school engine builders to describe the characteristic variation in sound of an idling engine with big lift and significant overlap cam timing. Mr Google .......... Cam “lope” is caused by the overlap when the exhaust valve is opening and the intake valve is closing. The more of an overlap, the longer and lower the sound of the “lope” will be. This is usually a result of a longer exhaust duration. Spartan 1771 likes this.

07-25-2016, 12:25 AM	#5 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	so how do the final drive gears skew dyno numbers? I have 4.08s __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

07-25-2016, 12:11 PM	#7 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	I believe my runs were done in 5th because of the gears. Are cars usually run in 4th? __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

07-25-2016, 04:44 PM	#8 (permalink)
Slartibartfas Track Member Join Date: Apr 2016 Location: Houston Posts: 551 Drives: 2011 G37S sedan Rep Power: 12	Runs are usually in the gear that is closest to 1:1. __________________ 2011 Journey Sport sedan 7AT \| SPL front, SPC rear camber arms \| ARK Grip cat-back \|

07-25-2016, 06:08 PM	#9 (permalink)
abm89 A True Z Fanatic Join Date: Feb 2013 Location: Austin, Texas Posts: 1,390 Drives: 11 370Z, 2x Kawasaki Rep Power: 64765	5th is 1:1 with the 3.69 Final drive (stock 6MT) __________________ Complete Parts List: https://github.com/abm89/ztouge-build

07-25-2016, 07:18 PM	#10 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,730 Drives: 09 nissan 370z Sp M6 Rep Power: 295380	I thought 4th is 1:1 (3.69)5th would read higher mumbers.

07-25-2016, 08:53 PM	#12 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,730 Drives: 09 nissan 370z Sp M6 Rep Power: 295380	Weird, guess different tuners dyno different. Ive ashtrays heard 4th.

08-18-2016, 01:17 AM	#13 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	Any update from ban25? __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

08-18-2016, 09:53 PM	#15 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,153 Drives: 2013 Nismo 370z Rep Power: 2684394	Sounds good. I wonder what it sounds like in the 7K RPM range. Guess we will have to wait and see after the break in process. cv129 likes this.

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