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

Spooler · 07-23-2019, 12:08 PM

Quote:

Originally Posted by johnnydrama

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, 01:21 PM

Quote:

Originally Posted by Spooler

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, 01:23 PM

wonder what the most someone's made on 91

chuckie311 · 07-23-2019, 02:24 PM

21whp and 8wtq on 91

Quote:

Originally Posted by OptionZero

wonder what the most someone's made on 91

hustleman222 · 08-26-2019, 09:41 AM

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, 01:14 PM

Quote:

Originally Posted by hustleman222

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.

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, 01:27 PM

Quote:

Originally Posted by hustleman222

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, 06:47 PM

Quote:

Originally Posted by hustleman222

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, 10:13 PM

Quote:

Originally Posted by Elmo370z

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, 10:38 PM

Quote:

Originally Posted by hustleman222

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, 11:01 PM

Quote:

Originally Posted by Spooler

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 · 08-27-2019, 12:17 AM

Quote:

Originally Posted by hustleman222

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 · 08-27-2019, 12:20 AM

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 · 08-27-2019, 12:26 AM

Quote:

Originally Posted by hustleman222

By leaving the vvel ladders alone...they are machined together

They can be rebuilt. MA-Motorsports can do it.

hustleman222 · 08-27-2019, 05:32 AM

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.

07-23-2019, 01:23 PM	#618 (permalink)
OptionZero A True Z Fanatic Join Date: Apr 2011 Location: Sacramento Posts: 3,224 Drives: 15 370Z Nismo 6MT Rep Power: 214100	wonder what the most someone's made on 91 __________________ OptionZero Build Thread

08-27-2019, 12:20 AM	#628 (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	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. sirnixalot likes this.

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