Thread: SR20VE Dyno: Stock Cams vs. SR16VE Cams

Nothing earthshattering here, this is pretty much what is expected when switching to SR16 cams.

Sorry for the HUGE graph, if someone can shrink it, please do so.

Green line is SR20 with factory cams
Blue line is SR20 with SR16VE cams
Switch points: 4400 Intake; 4700 Exhaust

Set Up:
SR16 cams - Calum ECU with bin for VE with Cams (richened up a little with 17* base timing)
SR20 Cams - JWT ECU at 15* base timing

All - 2.5" VRS exhaust with cat, HS CAI, Fuji

Runs were several years apart on the same car, corrected for temp, humidity, pressure.

When I started the runs, I had the switch points at 5000/5400 but this left a 400 RPM lag in the curve. At one point, I had both cams set at 4500, and the dyno operator (a BMW racer) almost jumped out of the car in shock when the cams popped. He said he thought that the engine had blown.

he tail pipe sniffer (data on graph) tracked my Innovate wide band very closely.

I might lean out the mixture a little next time I'm at the dyno.

Oh yea, for those that don't know, the Dyno Dynamics Dyno consistently reads 5-7% lower than many of the more commonly used dynos (e.g., Dyno Jet).

Bringing this back since I just got a set of SR16VE non N1 cams for my SR20VE

I tought the 16VE's would perform better than this, torque curve is not what I was expecting

That made me lol

That's not torque... I believe that is afr...

My bad, didn't notice the scale at the right :o

now some cam gears and some N1 pistons

Well just going to the regular 16ve cams isn't going to be a huge gain, but it looks like more power could have been had by pulling fuel out and tuning the timing map. Sounds like he just used a stock 20ve bin and bumped the base timing to 17*

I went with the 16VE since I'm runing 2.5" header/exhaust and I don't have plans of upgrading it to 3"

I haven't installed the 16VE cams yet, I could even hold a couple of months and get N1's instead but if 16VEs straight up show gains I'd rather stick to them.

I just don't wanna regret of going 16VE cams

Well you will regret them lol. There is really no reason to choose them over the n1's imo. Having a 2.5" exhaust is not one, Plenty of people run n1's with 2.5" including me. The n1's will make more power than the 16ve's pretty much everywhere even with 2.5" exhaust and at 0,0.

People always seem to think that they will lose lowend power going with the n1's, which is false.

N1's all the way. I'll be running N1's on my 2.5" exhaust setup.