Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: Ringland Weakness

+ Reply To Thread
Posts: 31-40 of 46
2012-03-22 14:46:17
#31
Originally Posted by Scrildo
Very good information man thanks a lot dude. Now all I have to worry about is the VE valves making contact with the det pistons lol. What's a good rev limit to set this thing at? 8000rpm???


If your going to get the head resurfaced make sure they take off only what's needed. Many just say I'll take off this much and not spend much time.
De/det pistOns will clear 2.0 with no issues.
I am currently running sr16 cams on de pistons and boost.
I have been running using de bottom ends on my car and as well as customers since 2005 with no issues.
The only one that mildly touched the intake valves was on a head I had resurfaced 3 different times.(personal head).Went boost then all motor then back to boost.
Speaking from my personal experience not others.
2012-03-22 14:56:00
#32
On ve pistons its different, I ran my stock 2.0 cams on my ve to 8500 rpm in 1st and 2nd gear and im sure there was some valve float but not enough to hit the pistons. On de/det pistons that could be a different story. You definitely dont want valve float on a boosted motor as power will significantly suffer when there is.

Kinda got to make a choice if your limited on funds.

DET pistons but with aftermarket springs and retainers in the head to let you rev higher on the 2.0 cams without having valve float,

Spend money on aftermarket pistons that will clear a set of sr16 or other cams you may want to use.

Its all dependant on what you want to do and accomplish with it.
2012-03-22 15:03:36
#33
Aston^ when your de/ve setup was up and running how long was your power holding that it required to rev past 8000 Rpms?
2012-03-22 15:09:51
#34
Originally Posted by cory
This is always a touchy subject. I know your not the first or the only one to say this, but I ran my stock ve for a yr to 8k and never had any bent valves so idk what to think..


guys, just to be CLEAR... I have seen Sr20det piston + vvl stock cammed head setups... and they ALL bent valves running to 8000rpm... The valves are only bent slightly but they do bend...

Im not saying that a N/A VVL Setup with stock VVL cams and stock VVL pistons will bend valves with > 8000rpms...
2012-03-22 15:19:00
#35
^^^^ 8head swaps no problems 6were boost. 2 were det pistons 5 on de pistons 1 was a roller rocker bottom end.I can't explain why you guys are bending valves.
Including when I'm running 1.6 cams on de pistons plus boost.
Last edited by gio94sr20ve on 2012-03-22 at 15-19-57. Reason: Added info
2012-03-22 15:21:20
#36
Originally Posted by gio94sr20ve
Aston^ when your de/ve setup was up and running how long was your power holding that it required to rev past 8000 Rpms?


Not sure as I never dynod it. That was my stock cam VE. I didnt have a rev limiter set as I had an old calum ecu back before there was the capability to have the rev limiter past 8k which ended up costing me the motor on a full throttle mis shift, lol.

All I know is that that it seemed to pull hard past 8k in 1st and 2nd but 3rd you could definitely tell power fell off badly as soon as you hit about 7900-8k.

It pulled soo hard through 1st and 2nd anyways that it was hard to shift before 8k.

I will say one thing, VE motors on stock cams dont like about 12k rpm that for sure. First time I full throttle mis shifted I got away with it. 2nd time it bent and dropped valves.
2012-03-22 15:25:49
#37
Originally Posted by ashtonsser
Not sure as I never dynod it. That was my stock cam VE. I didnt have a rev limiter set as I had an old calum ecu back before there was the capability to have the rev limiter past 8k which ended up costing me the motor on a full throttle mis shift, lol.

All I know is that that it seemed to pull hard past 8k in 1st and 2nd but 3rd you could definitely tell power fell off badly as soon as you hit about 7900-8k.

It pulled soo hard through 1st and 2nd anyways that it was hard to shift before 8k.

I will say one thing, VE motors on stock cams dont like about 12k rpm that for sure. First time I full throttle mis shifted I got away with it. 2nd time it bent and dropped valves.

Ok Aston the question again,when you had your DE/ve<- key part of the question. Not a full Vvl motor.
2012-03-22 15:31:35
#38
Originally Posted by gio94sr20ve
^^^^ 8head swaps no problems 6were boost. 2 were det pistons 5 on de pistons 1 was a roller rocker bottom end.I can't explain why you guys are bending valves.
Including when I'm running 1.6 cams on de pistons plus boost.


well its cool... i dunno y myself....
2012-03-22 15:33:20
#39
Originally Posted by blo0d
well its cool... i dunno y myself....


Head gasket used?thickness. Was the head resurfaced?how much was removed.
2012-03-22 15:35:06
#40
Only one that I did on a DE/VE when I built my buddies hybrid DE/VE setup on his 200sx. He was also running n1 cams as well and reving to 9k. When we took the head off the car when it spun a bearing due to lack of oil due to a bad leak, there was evidence of very very slight p2v contact. But I will say his cams were set to +5,-5 as well. It wasnt enough to bend valves though. Compression was still perfect across the board. I had to really look at it to tell it was that faint.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top