Thread: SR20VE w/ n1 cams dyno issue

i am surprised the motor survived @ +11 degrees on intake

this throws a lot of what is said on here into question...

like 'most you can advance cam gears is 6 degrees'

but...

peace

^^^I am sure he refers to +11 crank degrees = +5.5 cam degrees ^^
You have yours @ +10,-10 crank degrees and the motor its running strong right???

well he didnt say crank degrees

yes. mine is set @ +5,-5 and yielded 195whp/149tq and feels strong

my slick size/gear box combo is not the best but will see what she will do on the 1320 this month end

peace

If he didnt meant to say +11 crank degrees were did he got a cam gear that allow him to advance +11 cam degrees since there its none in the market most cam gears are rated @ +10,-10 cam degrees.... ???

only he would have to say that

i cant think for him or assume

first he said 12 degrees, then 11. so i really dont know.

peace

I was told by the first place that took the car that the setting were +12 IN, -7 EX. I got the second place to verify this which returned with +11 IN, -4 EX meaning that the first tuner gave me the wrong information in the first place.

I spoke to the new tuner this evening and was discussing the tune as i had a feeling the previous was out of whack and i guess i was on the money.

They didn't feed it much timing and after the second tune was done it made 124KW with identical cam gear timing.

The cam gears are BC cam gears and allow for an adjustment of +15,-15.

The second tuner expressed his concern for valve damage from the excessive cam timing.. compression test was done just to be sure and everything came back A1.
I'll explain it so i no longer confuse you guys haha.

Dyno sheet 1 =SR20VE cams WITH TUNE vs N1 cams WITH TUNE
- Tune was done at the same place.
- (RED)SR20VE cams WITH TUNE(no dialing) = 111.7KW
- (BLACK)N1 cams WITH TUNE(dialing, +12, -7 *even tho it was actually +11, -4* = 114.9KW


Dyno sheet 2 = N1 cam + tune from previous place VS N1 cam + tune from second workshop
- (RED)N1 cams WITH PREVIOUS TUNE(dialed to +11,-4) = 116.2KW(within 1 kw of the previous dyno)
- (BLUE)N1 cams WITH NEW TUNE from second workshop(+4, -2) = 131.3KW


In saying this i would assume that if i dynoed my car on the first dyno provided conditions were the same, i would be within 1KW of the final tune.

Regardless I am extremely happy with how the car is performing apart from wondering how the stock cams would have performed if they were taken to the second shop

BC cam gears you mean Brian Crower ?
If they are brian crower they are advertised @ +10 -10

I was also stumped by this, as on the cam gears -15 and +15 are evident.



Pictures were taken when they were bought awhile back

i find this very interesting.

that's why i didnt assume, payu

carry on guys. i am learning

peace

Glad you got it all figured out and running better.