tooter's manifold adventure...

[cali yaris]

That bone stock dyno chart is not your car, correct? There will be natural variation in that number (note the 93 degree temps for example, warm day!) You've been a big proponent of posting charts for the same car, under the same conditions, on the same dyno, which are awesome when someone bothers to do it, as you have.

The before and after tooter dynos were especially helpful.

Tooter, how did you get the car to rev to 6500? I thought stock rev limit (as shown on the stock dyno) was 6250.

I'm also not sure the difference between SAE and STD smoothing -- anyone know?

[mario98c]

Originally Posted by cali yaris

That bone stock dyno chart is not your car, correct? There will be natural variation in that number (note the 93 degree temps for example, warm day!) You've been a big proponent of posting charts for the same car, under the same conditions, on the same dyno, which are awesome when someone bothers to do it, as you have.

The before and after tooter dynos were especially helpful.

Tooter, how did you get the car to rev to 6500? I thought stock rev limit (as shown on the stock dyno) was 6250.

I'm also not sure the difference between SAE and STD smoothing -- anyone know?

The stock rev limiter is 6,500rpm.

[tooter]

Originally Posted by etherdude

Tooter,

I would estimate you have optimized the volumetric efficiency of this particular air pump. A gain of 20 hp at the wheels is awesome. Without changes to cam timing, fuel map, and injectors (meaning access to the ECU), I cannot imagine there is anything left in a naturally aspirated Yaris. Think about it...your at the crank hp is pushing 125+.

I know nothing about the electronics and so chose to leave them totally untouched while focusing solely on the physical aspects.

And the dyno runs tell only part of the story. In normal daily operation nothing was conceded to drivability or to getting excellent gas mileage. I believe this is because I didn't alter the factory electronic engine management and instead turned my attention to the issue of flow.

[tooter]

Originally Posted by CrankyOldMan

While it's disappointing to see that there isn't an appreciable improvement, it's certainly unique.

The other side is that there isn't any appreciable loss either, so it's break even. The et wasn't intended for sale anyways as it takes way too much work to build one. It was just to satisfy my own curiosity.

Have you considered changing the runner length on a "standard" tooter for comparison?

Yes, I'm considering longer runners and also a larger plenum using the et as a test bed for further experiments. This stuff is as addictive as crack. You're always asking yourself... well, what else can I do?

[JustDidIt]

Originally Posted by tooter

So with:

Intake
Throttle body
Intake manifold
Header
Axle back exhaust

I have 22% more horsepower, and 15% more torque with the stock ECU, no tuning, and regular 87 octane pump gas. Latest gasoline fillup today: 39.4 mpg.

Total cost: $1,350

That's impressive considering you haven't modified any electronics and let the stock ECU make any corrections.

Tooter, I really plan on coming up in the next 2 wks or so. I'd like to meet up and talk with you about my ideas for my 1NZ-FXE. It includes a few items like the ones below...

[tooter]

Originally Posted by JustDidIt

That's impressive considering you haven't modified any electronics and let the stock ECU make any corrections.

Tooter, I really plan on coming up in the next 2 wks or so. I'd like to meet up and talk with you about my ideas for my 1NZ-FXE. It includes a few items like the ones below...

Sounds like fun!

PM me in advance before you come so that I can set some time aside from work, and we can explore the possibilities. Oh oh, stainless. That's a lot harder to work with than aluminum. But it's still buildable material.

Greg

[japle]

This should be interesting....

[tooter]

It should be. The Prius engine operates within different parameters than the Yaris engine does.

[YotaYaris]

Originally Posted by cali yaris

That bone stock dyno chart is not your car, correct?

I would also like to know about this.
Different Dyno?
Different Day(Humidity/Temp)?
Different Car?
Different Altitude?

Post 1375 is at HK MotorSports in CA
Post 1378 is at Keith's Pit Stop in PA

[tooter]

Originally Posted by YotaYaris

I would also like to know about this.
Different Dyno?
Different Day(Humidity/Temp)?
Different Car?
Different Altitude?

Post 1375 is at HK MotorSports in CA
Post 1378 is at Keith's Pit Stop in PA

I picked the other dyno run because it had higher results than this one, but since you asked, here's a stock dyno run from the same shop and the same dyno machine.



With the stock engine making 106 at the output shaft, 15 horsepower in drive train losses seems to be the norm.
I believe that the first two charts are of auto transmissions, so manual transmissions would naturally have less drivetrain losses. So you can spot them a few more horsepower if they were manuals.

Interestingly enough, we had the same issue with information dropping out on the graphs, but resolved it by grounding the chassis to a bolt in the concrete floor.

Here's another with intake and exhaust mods for comparison.



These are all posted in the dyno thread sticky in this section. It's an interesting read.

[tooter]

Another tooter rolled off the assembly line...



It's available on ebay for $545 with free shipping.

The tooter Build Your Own Intake Manifold Kits are also available on ebay for $295 with free shipping...

[fnkngrv]

Originally Posted by mario98c

The stock rev limiter is 6,500rpm.

I would like to know how you have come to this conclusion? I wouldn't go totally off the tach that you are showing if that is your evidence. I have had several dyno runs and the software logging without a shadow of a doubt that 6250 is indeed where the stock ECU begins to force the AFR into a serious lean condition which is how Toyota actually "rev" limits as opposed to other methods.

[Bluevitz-rs]

I don't know what post that's from but on my Echo it is indeed 6500rpm. It's different between models.

[fnkngrv]

http://www.yarisworld.com/forums/sho...postcount=1382

[fnkngrv]

So after close to 1400 posts I guess my question is what does this intake actually gain someone? if HP/TQ are negligible are we talking an FE gain at this point? I apologize, but with this many posts even digging back on a couple hundred can be muddled.

[Bluevitz-rs]

The PR spec cars might be. The PR spec '03 HB I drove a long time ago had a 6700 redline.

[fnkngrv]

^ very good and valid point! I had forgotten that.

[cali yaris]

I'll test and video JR's car today. We should be able to hear the fuel cut at 6250... or 6500.. or 6700...