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Nissan 370Z Forum (http://www.the370z.com/)
-   Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)
-   -   Jim Wolf Cam testing for the VQ37VHR -- Results inside! (http://www.the370z.com/engine-drivetrain/107674-jim-wolf-cam-testing-vq37vhr-results-inside.html)

Spooler 07-23-2019 11:08 AM
Quote:
Originally Posted by johnnydrama (Post 3868866)
Here is the graph. The 342whp run is from May 2018 before the Cam installation. Temp./Humidity was also much more favorable during that session as well. You can clearly see the loss in midrange torque.
Your Tq curve is very very flat. That's a good thing. It would be nice to see the before and after on the same graph. The heat did kill your power levels for sure.

johnnydrama 07-23-2019 12:21 PM
Quote:
Originally Posted by Spooler (Post 3868883)
Your Tq curve is very very flat. That's a good thing. It would be nice to see the before and after on the same graph. The heat did kill your power levels for sure.
The before run is the Red line at 342 WHP 271 WTQ

OptionZero 07-23-2019 12:23 PM
wonder what the most someone's made on 91

chuckie311 07-23-2019 01:24 PM
21whp and 8wtq on 91


Quote:
Originally Posted by OptionZero (Post 3868892)
wonder what the most someone's made on 91

hustleman222 08-26-2019 08:41 AM
3 Attachment(s)
So I started doing the cam install Saturday, actually pulled #1 valve spring and went to replace with the jwt supplied valve spring but the retainer didn't fit the supplied valve spring. I talked to someone at JWT and they told me that I would need an earlier model valve spring retainer (that's been discontinued). Did anyone else come across this problem, I would like to know what year they apparently changed to the beehive style valve springs.

johnnydrama 08-26-2019 12:14 PM
Quote:
Originally Posted by hustleman222 (Post 3874845)
So I started doing the cam install Saturday, actually pulled #1 valve spring and went to replace with the jwt supplied valve spring but the retainer didn't fit the supplied valve spring. I talked to someone at JWT and they told me that I would need an earlier model valve spring retainer (that's been discontinued). Did anyone else come across this problem, I would like to know what year they apparently changed to the beehive style valve springs.
:confused:

I'm not sure, was not an issue for me and my install on a 2011. Hopefully someone here can assist or give an explanation.

Spooler 08-26-2019 12:27 PM
Quote:
Originally Posted by hustleman222 (Post 3874845)
So I started doing the cam install Saturday, actually pulled #1 valve spring and went to replace with the jwt supplied valve spring but the retainer didn't fit the supplied valve spring. I talked to someone at JWT and they told me that I would need an earlier model valve spring retainer (that's been discontinued). Did anyone else come across this problem, I would like to know what year they apparently changed to the beehive style valve springs.
That may have changed in 2015. Several things did.

Elmo370z 08-26-2019 05:47 PM
1 Attachment(s)
Quote:
Originally Posted by hustleman222 (Post 3874845)
So I started doing the cam install Saturday, actually pulled #1 valve spring and went to replace with the jwt supplied valve spring but the retainer didn't fit the supplied valve spring. I talked to someone at JWT and they told me that I would need an earlier model valve spring retainer (that's been discontinued). Did anyone else come across this problem, I would like to know what year they apparently changed to the beehive style valve springs.
Cheap heads. Don’t know what year these came off of

hustleman222 08-26-2019 09:13 PM
Quote:
Originally Posted by Elmo370z (Post 3874943)
Cheap heads. Don’t know what year these came off of
I hope noone buys these...I asked if he disassembled them and he said yes... that's a huge no no. Those are trash now unless maybe you are a master tech. The ladders are disassembled and ruined.

Spooler 08-26-2019 09:38 PM
Quote:
Originally Posted by hustleman222 (Post 3874966)
I hope noone buys these...I asked if he disassembled them and he said yes... that's a huge no no. Those are trash now unless maybe you are a master tech. The ladders are disassembled and ruined.
LOL, they are not ruined. How do you think they build motors, do valve jobs, and replace the valve guides, etc.

hustleman222 08-26-2019 10:01 PM
Quote:
Originally Posted by Spooler (Post 3874970)
LOL, they are not ruined. How do you think they build motors, do valve jobs, and replace the valve guides, etc.
By leaving the vvel ladders alone...they are machined together

Elmo370z 08-26-2019 11:17 PM
Quote:
Originally Posted by hustleman222 (Post 3874974)
By leaving the vvel ladders alone...they are machined together
I sold a pair of heads like this to a forum
Member. Heads are installed and car is very closed to being tuned. How do you think people install c2 cams? Have to remove the ladder to removed the oem exhaust cam.

Elmo370z 08-26-2019 11:20 PM
Sirnixalot. I sold
Him heads, vvel girdle was disassembled. He had a spare vvel girdle and used them on the heads I sold him. Those heads are a steal.

Spooler 08-26-2019 11:26 PM
Quote:
Originally Posted by hustleman222 (Post 3874974)
By leaving the vvel ladders alone...they are machined together
They can be rebuilt. MA-Motorsports can do it.

hustleman222 08-27-2019 04:32 AM
1 Attachment(s)
Ok, maybe I shouldn't be worrying as much then. The factory service manual says that they can't be mixed and matched (ladders & heads). It looks to me like the control shaft has been removed, which the fsm clearly states never remove the black bolts on the control shaft or make adjustments to the rockers.


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