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Thread: Safe max rev on SRXXVE cams

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Posts: 181-190 of 190
2012-10-11 06:11:27
#181
Originally Posted by niZmo
Originally Posted by vqman
reading this, its pretty unclear to me.. and I feel as though some people who may be extremely knowledgable don't pay attention to detail when they write.. for example, they might call N1 cams/springs SR16 cams/springs... instead of specifying N1 or NON-N1



So here is my question:
On a standard (non-20V) SR20VE motor, do SR16VE N1 cams require stiffer springs/retainers to continue getting power beyond 7000 rpms in every instance, or is it just sometimes??


how far beyond 7000rpm do you plan to go?

peace
8000 or so.. But it isn't just that i want it to rev safely to 8000, i want to continue making power beyond 7000... I thought i read some of the SR20VEs have weaker springs that will cause valve float and a loss of power... And you only know you will have this issue after you install cams and dyno the car, and see no power beyond 7200 or something....

Is that only the case with certain cams? Do the N1 cams work just as good with both the "weak" and "strong" springs? While other cams need the strong springs??

I just don't want to do my cam install twice..




Originally Posted by ashtonsser
No you dont need stiffer springs and titanium retainers to rev past 7k with n1 cams. Again most people at least take their n1's to 8000-8500 without issues. My buddy took his to 9k with no issues, 3 years+ on stock sr20ve standard springs and retainers.


Originally Posted by b12sr20ve
Again i just did rev my 20ve n1 cams to 9k using nemu Rt. It just keeps pushing since i have fuel and timing past 8k.using stock springs
Last edited by vqman on 2012-10-11 at 06-12-20.
2012-10-11 06:30:25
#182
your confusing the valve float issue with the use of stock sr20ve cams. Not the n1 cams.

Some have come across depending on the year of the motor, 2 different sets of springs. Either way they are close to each other. Stock VE cams will begin to float the valves after about 7200 on one set and about 7700 on another set.

N1 cams you dont have to worry about what set you have, it will hold power well past 8000 even on a basic setup. It will peak around 7600 or so but hold close to peak power to 8500 or so. Doesnt matter what spring set your motor came with in this instance. Ive yet to see a ve that didnt act the same way.
2012-10-11 07:10:04
#183
OK, finally i feel clear on the subject.. Depending on how finishing up my VE install goes this weekend, we may drop the N1 cams in too then.
2012-10-11 07:51:39
#184
do it and dont look back. lol
2012-10-11 08:54:56
#185
Drop them n1 in youll have that smile in ya face when the vvl pops and it keeps pushing til 9k without valve float.
2012-10-11 17:51:32
#186
From what I've read the stock VE cams have a more aggressive ramp angle than the N1 cams which contributes to the valve float at the designated RPMs with stock springs. I road race my 91 SE-R at 8.2K RPM with N1s and stock springs all out up to 8 20 minute sessions on a race weekend and not a hiccup. Power holds, pulls hard. Just do it.
Last edited by blusteelsr20 on 2012-10-11 at 17-53-44.
2013-05-12 15:12:28
#187
what is safe limit for 20v cams w/ 20v head (stock springs and retainers)?

I see ti retainers here: http://www.sr20-forum.com/forced-induction/31564-f-s-20v-supertech-titanium-retainers.html

curious what kind of limits there would be with those in dual spring but i'm not sure how many people have run them.
2013-05-12 18:03:56
#188
Originally Posted by jasonb
what is safe limit for 20v cams w/ 20v head (stock springs and retainers)?


Check post #2 in THIS thread.

And then there's also this.

More info for your consideration.
2013-05-13 02:16:12
#189
^^ thank u sir. good info there (seat pressures etc) but no datapoints for 20v cam + 20v head. I guess i'll assume stock rev limit. Say, what is the stock rev limit?
2013-05-13 19:33:57
#190
Originally Posted by jasonb
^^ thank u sir. good info there (seat pressures etc) but no datapoints for 20v cam + 20v head. I guess i'll assume stock rev limit. Say, what is the stock rev limit?


SR20VE 20V factory redline is 7800 rpm.
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