tooter's manifold adventure...

[Bluevitz-rs]

No updates yet I guess...

[tooter]

Sorry, Blue.

I've been distracted with developing another tooter product...





And just got the prototype running on my truck today...




It made the intake runners 12% longer and really lowered the torque curve. I can slip the clutch in first gear with no gas pedal and the truck doesn't stall out even down to just 400rpm.

The Yaris is running great...

...and It'll be on the dyno soon after we drive it a while to make sure everything gets settled in.

[tooter]

I cut about half of the bend off of the slilcone coupling to straighten the intake because the air filter didn't need that much bend. So it's all ready to run...



Just called Harry...

...dyno test is on for Saturday.

[cali yaris]

Cool!

[tooter]

...and the Tacoma hits the dyno next week if I can find the free time.
I already did the baseline dyno, so the next one will be with the tooter II.VII.

[Viperoni]

Sweet!

[tooter]

On the dyno, the tooter et didn't perform any better than the regular tooter, but it didn't perform any worse either. With 111hp and 105tq the graphs are basically the same. So for all my tinkering around, I didn't actually change anything!

[etherdude]

Tooter, please remind us. How do your fully modded figures compare with "bone stock"?

Thanks, Doug

[CrankyOldMan]

While it's disappointing to see that there isn't an appreciable improvement, it's certainly unique. Have you considered changing the runner length on a "standard" tooter for comparison?

[tooter]

Originally Posted by etherdude

Tooter, please remind us. How do your fully modded figures compare with "bone stock"?

Thanks, Doug

Here's bone stock dyno runs from the dyno chart sticky thread:



The results.

Stock:

91hp

91tq

Tooter:

111hp

105tq

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

[tooter]

I'd also add that none of these modifications has altered the basic reliability economy or longevity of the engine. My wife's car is still just a regular daily driver that always needs to be in service.

Now it's just way more fun to drive...

[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+.

[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