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

brucelidat · 07-24-2016, 04:12 PM

Any idea when you'll have her on the dyno for a tune? Were the pistons expensive? I wonder how much of a difference the higher compression makes.

ban25 · 07-24-2016, 04:48 PM

Quote:

Originally Posted by brucelidat

Any idea when you'll have her on the dyno for a tune? Were the pistons expensive? I wonder how much of a difference the higher compression makes.

I don't have a cost breakdown for the individual engine parts, but the whole thing was $6400. The main goal is to create a highly reliable track-oriented build. Hence it also has the CJM oil pan, road race pump, and eventually I'll add the RJM oil pump gears.

It's on the dyno now for break-in, so I'll have numbers soon, probably next week. Starting from my previous EcuTek tune, we had to adjust the throttle table down a bit because it was too twitchy with all the extra torque.

brucelidat · 07-24-2016, 05:42 PM

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.

ban25 · 07-24-2016, 06:28 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, 09:08 PM

'lobe lobe lobe'

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

brucelidat · 07-24-2016, 09:33 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, 10:33 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.

Elmo370z · 07-24-2016, 11:03 PM

Quote:

Originally Posted by ban25

Yep, all stock except for suspension and oil cooler. The new one will have all that, and higher compression (11.5:1) and a new exhaust to mate up to the LTHs -- haven't decided which one yet, I'd like to get the F.I. one, but it takes too long to make.

Also, the 3.9 final drive will skew the new dyno numbers a bit.

There is one on the forums for sale

ban25 · 07-25-2016, 12:09 AM

Quote:

Originally Posted by Elmo370z

There is one on the forums for sale

Ooh, good catch!

brucelidat · 07-25-2016, 01:25 AM

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

abm89 · 07-25-2016, 12:01 PM

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, 01:11 PM

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

Slartibartfas · 07-25-2016, 05:44 PM

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

abm89 · 07-25-2016, 07:08 PM

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

Elmo370z · 07-25-2016, 08:18 PM

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

07-24-2016, 04:12 PM	#196 (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: 31	Any idea when you'll have her on the dyno for a tune? Were the pistons expensive? I wonder how much of a difference the higher compression makes. __________________ 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, 05:42 PM	#198 (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: 31	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. __________________ 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, 09:08 PM	#200 (permalink)
Slartibartfas Track Member Join Date: Apr 2016 Location: Houston Posts: 551 Drives: 2011 G37S sedan Rep Power: 10	'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, 09:33 PM	#201 (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: 31	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, 10:33 PM	#202 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39974	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, 01:25 AM	#205 (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: 31	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, 01:11 PM	#207 (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: 31	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, 05:44 PM	#208 (permalink)
Slartibartfas Track Member Join Date: Apr 2016 Location: Houston Posts: 551 Drives: 2011 G37S sedan Rep Power: 10	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, 07:08 PM	#209 (permalink)
abm89 A True Z Fanatic Join Date: Feb 2013 Location: Austin, Texas Posts: 1,386 Drives: 11 370Z \| 24 EL450 Rep Power: 64763	5th is 1:1 with the 3.69 Final drive (stock 6MT) __________________ Complete Parts List: https://github.com/abm89/ztouge-build

07-25-2016, 08:18 PM	#210 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	I thought 4th is 1:1 (3.69)5th would read higher mumbers.

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