Thread: dyno results

Hey dynoed my sr20ve with the following mods and got this result

Sr20ve w/sr16 cams
SSAC Header, 2.25 till flex pipe, 2.5 following to muffler
Calum Basic, will attach rom also will attach datascan data log
Fidanza Flywheelwheel
3in WAI arm w/pod filter w/ vstack
cams at 4800 in/ex

made 169whp/130wtq std or, 166/128 sae....

now my reasearch has shown that the majority sr20 normally makes >135 wtq... even in stockish form so I wanna know what do you guys think could be the reason for my extremly low torque output?


a/f



Timing
7500 - 37
7200 - 36
6800 - 35
6400 - 35
6000 - 34
5600 - 34
5200 - 33
4800 - 32
4400 - 26
4000 - 25
3400 - 23
3000 - 23

For starters you are turning the cams on to early. Change your switch pint to about 5200 or 5400 RPMs. That will get tid of that nasty dip in power

What MAF are you using?

What is base timing on the Distributor?

What spark plugs are in the car and if you did change them did you gap them?

Bring AFM up to 13.5 to 1. This seems to have worked best for me and others.

You need to pick up about 18 WHP to be in the ballpark of WHP you should be getting.

Try VVL at 5100 rpm.

I am in worst situation than you. Dynoed 160, 129, that is after getting 175 and 134 after my first tune. Wonder what were are doing wrong compared to our counterparts in the USA?

Not too worried about it thou. My set-up is in my signature.

Peace

a/f



If you read his post and look at the graph you will see that you are off by a bit.

He clearly states that he switches the cams at 4800 RPMs. On the gragh one can clearly see the switch point is listed as being 4600 RPMs.

The cause for this is the graph to RPM corolation is off by 200 RPMs.

So, if you move the graph up by 200 RPMs to 4800 RPMs where he clearly states his switch point is, we can summarize that the optimal switch point is between 5200-5400 RPMs.

@ Dre,

Cool.

Point taken.

Dont take me serious, I just like to argue sometimes.

Dont have a problem with that at all. As long as it makes sense...

Andreas, you see gains all the way up to 13.5:1 AFR? That's news to me.

I agree cam switch point should move to 5,200 at least.

As for your ignition timing, that looks super retarded off cam and a bit advanced at torque peak and on cam. I'm thinking more something like this:

Timing
7500 - 31
7200 - 31
6800 - 30
6400 - 30
6000 - 30
5600 - 30
5200 - 32
4800 - 32
4400 - 34
4000 - 34
3400 - 33
3000 - 31

This is taking into account the cam switching at 5,200 rpm. Did you try anything like this on the dyno? I'm sure you could use more timing early on, and then you look too advanced past 4,800 rpm.

If you look at the guys from Miami with VEs they are between 13-14 to 1 AFR ratios. I ran my VE in the 13.8 to area up top and 12.5-13.0 to area in the mid range. Thats just me. I ran mine richer on the mid range to make sure I got no pinging in the heavy load area.