Thread: New VE-T blogger, dyno low boost 6-10-10.

Eh not bad, Your torque is very very close to your hp, That shows me your getting to the end of the efficiency of the turbo or close to it. You can see your torque is a good 80 ft-lbs less than your hp at the lower boost levels but once you broke the 400 mark your torque was moving closer and closer to your hp. Which at 446whp you made 401wtq.

how many psi was that at on the 446 run.

You need to dyno this a little better.

You should have made dyno runs at 10 psi 15 psi and then 20 psi. and also have comparisons at the same boost level from before, comparing diffrent boost levels makes no sense.

Everything is a little confusing.

So far I got 308 WHP at 10 PSI

and

maybe 363 WHP at 14 PSI.

You can come to a clear assumption that you will make about 432 WHP at 20 PSI which would put you way ahead of where you were before.

Here is a comparison of 15-16psi on the log manifold vs 13-14psi on this current setup. The 16psi run was off Absolute, so about 18psi up here. The 14psi is relative boost. Basically this is like comparing a 17psi run to 14psi.

Ok so you are still not being to clear but lets see if I got this right

16 psi long = 361 WHP

14 psi new setup = 363 WHP.

Again when you make dyno runs for proper comparison alwasy do the runs at the same boost levels as before or make run at 10psi, 15 psi, 20 psi and 25 psi. This also shows you incremental WHP gain for every 5 PSI of boost.

^I was thinking the same thing, but I'm not a turbo guru, so I didn't want to be the first to say this. Why did you do the comparisons like that Coheed?




^Increment FTW.

Edited to explain a little better.




no, the 446whp run was a comparison to my older graph. Open DP, 25psi boost, 100 oct, 2.0 cams.



25psi, see above, that dyno was from october last year.



Ya, sorry it is a manual boost controller that I decided to change on the fly. Best run on 10psi was 317whp. Best run on 14psi was 363whp. Overall, power wasn't all that much different from my last fresh motor. The revs make it faster for sure, and it is making similar power on 2-3psi less boost.

I really tried to keep everything about the same, but I was really reluctant to push this too far. I know 14psi isn't really pushing it for pump gas, but I'd rather be safe. This motor only has about 200 miles on it.

What concerns me the most is the way power drops up top. The 1.6 cams actually don't seem to be making that much more power than the VET cams did. The power seems to drop really quick on the top end, which may be because of? Exhaust? Cams not a good combo for this motor?

I am going back to the dyno in a little while to see what she does on 100octane.

But I would like to see what timing will do with higher octane fuel. I keep getting the feeling like the tune needs some work. But I don't wanna get on that subject.

yeah your graph is much smoother and you have an extra 1k rpm of power band or more. So it will seem faster and would help your times when your at the track.

Coheed, we are tight but this still makes no sense.

You say over all power was not that diffrent from your last motor, then you say the new motor is making similar power numers on 2-3 psi less.

let me show you something

10 PSI 317 WHP
14 PSI 363 WHP

Thats 11.5 WHP per every pound of boost.

So at 2-3 PSI less you are making similar numbers which is roughly a 23 to 34 WHP gain with 2-3 PSI less. Let me tell you at lower boost levels that is a damn monster gain. The percentage diffrence at high boost levels will go up.

I bet at your old 25 PSI @ 446 WHP

will be more like new 25 PSI @ 490 WHP.

Thanks MIKO. It def seemed to respond a lot harder to more boost. I noticed a big difference running 12psi over 10psi on the street. Perhaps with more time, this motor will perform with the #s I've always wanted. But to be completely honest, I am really happy with the power it makes now. It just feels great!