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Thread: Safe max rev on SRXXVE cams

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Posts: 161-170 of 190
2012-09-06 20:55:25
#161
Originally Posted by nismo94tuner
I still say guys should get kelfords, an intake manifold, and a real header . They are the truth for these motors. Mine peaks at 9500-9600.

Verdict: Stock cams peak ~7200. N1's with stock IM usually ~7800.N1's with custom IM and proper 4-1 ~8500.


if you ever did a 2.0L vvl, how much did you make with kelfords, custom IM and 'real" header?

thanks

peace
2012-09-06 21:02:11
#162
My last 2.0 made 222whp with crushed 4-1 header and stock IM. Header was destroyed on a parkway when I bottomed out on a bridge and crushed in the bottom pipes along with a fat crack in my collector. That was on a heartbreaker dyno.
2012-09-06 21:34:18
#163
Originally Posted by nismo94tuner
My last 2.0 made 222whp with crushed 4-1 header and stock IM. Header was destroyed on a parkway when I bottomed out on a bridge and crushed in the bottom pipes along with a fat crack in my collector. That was on a heartbreaker dyno.


thanks

what compression? what octane fuel?

peace
2012-09-06 22:01:28
#164
Originally Posted by 5speed
Originally Posted by ashtonsser
Originally Posted by Storm88000
Hey guys, I just had my g/f take this vid of the tachometer/speedometer in the VVL, from 1st gear to the very beginning of 3rd gear. As I said many times, in this car, 1st gear is pretty much useless since I just get spinning tires, so I waited in the vid I until I got up to speed before hitting WOT, but 2nd gear is pretty good. This was also going up a pretty steep hill. I believe I shifted just a couple hundred RPM before fuel cut (which is about 8000rpms) You can see VVL engages at about 5200rpms.
Vid:

SE-R :: 6acd3006949963bd00b6b6f9cfb176ef.mp4 video by jennag812 - Photobucket


And your car is still pulling hard as hell at 8200, just wants to keep going, Again can definitely benefit from more revs for sure.

Here was my stock cam VE with no rev limiter. You can hear the pitch/tone of the motor change at about 7800 which is were power takes a nose dive.



Ashton, your ear dyno needs to be recalibrated. It's a little bit optimistic.

Just take at look at all these dyno charts.

The VE Dyno Post - SR20 Forum



I understand your point but I also want to say that ashton knows what he's talking about.. he has a 10 second SR20..

"I owe you a 10 second car"
Last edited by Storm88000 on 2012-09-06 at 22-02-06.
2012-09-06 22:22:13
#165
Originally Posted by niZmo
Originally Posted by nismo94tuner
My last 2.0 made 222whp with crushed 4-1 header and stock IM. Header was destroyed on a parkway when I bottomed out on a bridge and crushed in the bottom pipes along with a fat crack in my collector. That was on a heartbreaker dyno.


thanks

what compression? what octane fuel?

peace


SR16 pistons with 20ve block/rods/crank. Milled the head and used a VET gasket. Figure compression is roughly 13.2:1 give or take. This was a 93 pump gas setup.
2012-09-06 22:54:15
#166
Originally Posted by ashtonsser

The whole goal is to give yourself the highest possible average whp after each shift throughout each gear. Plain and simple. Even if that means shifting a little into after the power nosedives being if the power where you would end up being after a shift is making a lower whp. GET IT?????? If not then I cant help you anymore.


I have to admit, I haven't read through the whole thread, but from just skimming the last couple pages I gathered my following thoughts:

Ashton, the problem with your logic is that you are robbing yourself of positive momentum. When you shift, now your motor has to work against inertia. Less inertia to overcome with the other school of thought. That is an important variable you seem to dismiss. Additionally, I agree, the idea is to put yourself in the fat end of the powerband - biggest area under the curve (never thought I'd refer back to Calculus :rofl. But let's study your logic further... you seem to easily assume that your logic is always going to give you the highest average HP, however, that is not always the case. It is highly dependent on the slope of the curve before peak vs. after peak.

Basically, both schools of thoughts are right...and equally wrong.
Last edited by SE-Rawkus on 2012-09-06 at 22-57-58.
2012-09-06 22:58:59
#167
Last edited by lynchfourtwenty on 2012-09-06 at 23-00-44.
2012-09-06 23:04:18
#168
LOL
2012-09-06 23:09:30
#169
Originally Posted by nismo94tuner
My last 2.0 made 222whp with crushed 4-1 header and stock IM. Header was destroyed on a parkway when I bottomed out on a bridge and crushed in the bottom pipes along with a fat crack in my collector. That was on a heartbreaker dyno.


SR16 pistons with 20ve block/rods/crank. Milled the head and used a VET gasket. Figure compression is roughly 13.2:1 give or take. This was a 93 pump gas setup.
What ECU did you run? I had the same setup in the 200sx and my car made 216 WHP from what I hear.
Last edited by SE-Rawkus on 2012-09-07 at 01-21-04.
2012-09-06 23:39:20
#170
Calum basic. Simple, simple science.
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