VQ Valve Spring spec. charts

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04-30-2007, 12:21 PM

#41

6spd_Hayes

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Quote:

Originally Posted by SR20DEN

I am revving to 7500 now with the stock valve springs and cams. But there is still no guarantee that the HR springs will do the job to 7500 on cams that have 1.32mm more loft and 24* more duration than the VQ35 OE cams.

There is only one way that question can be answered. Someone has to do it.

Soon..........

04-30-2007, 03:24 PM

#42

SR20DEN

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I just confirmed with Nissan FAST and DAVEB that the VQ35DE REVUP valve retainers are the exact same part number as the VQ35HR valve retainers.

NEW retainer part# 13209-AC700 VQ35DE (REVUP), VQ35HR

OLD retainer part# 13209-6N200 (VQ35DE)

Get pricing from Dave Burnette or your local Nissan parts department.

http://www.vq35de.com/Images/valvesp...etainers01.jpg
http://www.vq35de.com/Images/valvesp...etainers02.jpg

04-30-2007, 05:41 PM

#43

Nietzsche

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Very nice, I've no doubt they can handle the job of an aggressive cam at 7500.

04-30-2007, 07:37 PM

#44

AnDyMaN

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Quote:

Originally Posted by SR20DEN

I just confirmed with Nissan FAST and DAVEB that the VQ35DE REVUP valve retainers are the exact same part number as the VQ35HR valve retainers.

NEW retainer part# 13209-AC700

OLD retainer part# 13209-6N200

Get pricing from Dave Burnette or your local Nissan parts department.

http://www.vq35de.com/Images/valvesp...etainers01.jpg
http://www.vq35de.com/Images/valvesp...etainers02.jpg

sorry, i dont know why i keep getting confused.

so part number is the same. but what is new and old retainer part number? is old the vq35de (fwd)? and the new the rev up/hr?

04-30-2007, 08:32 PM

#45

Theyears02

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Quote:

Originally Posted by AnDyMaN

sorry, i dont know why i keep getting confused.

so part number is the same. but what is new and old retainer part number? is old the vq35de (fwd)? and the new the rev up/hr?

new=HR/revup
old=VQ35DE all except revup

12-09-2007, 06:33 AM

#46

doublea

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Where do you guys get the HR spring & retainer ?

12-09-2007, 09:58 AM

#47

NmexMAX

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Dealer

12-09-2007, 10:43 AM

#48

nismology

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DaveB FTBargain...

12-09-2007, 10:50 AM

#49

NmexMAX

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I got mine from Dave B

12-09-2007, 12:19 PM

#50

spdfreak

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Quote:

Originally Posted by SR20DEN

This means that even with 11mm lift cams you can double shim the HR spring to raise the seat pressure and still not get coil bind (for a total of 12mm effective spring lift pressure).

Good info.
If you could excuse my newbie'ness to this field, I have a question.
Double shim what? I got lost there. I understand what a shim is, and what coil bound is, but whats the gain of double shimming? Where is the shim placed?

12-09-2007, 01:04 PM

#51

nismology

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Quote:

Originally Posted by spdfreak

Shimming increases the seat pressure of the spring by preloading it. The shim goes between the spring seat and the spring.

Also, double shimming isn't absolutely necessary. It depends on the requirements of your particular setup.