tooter's manifold adventure...

[Bluevitz-rs]

So it must be something you feel I the seat of your pants as you drive.

[tooter]

Originally Posted by Bluevitz-rs

So it must be something you feel I the seat of your pants as you drive.

Yes, and it drives just like the dyno chart results show.

Torque feels different from horsepower. Horsepower is the ability to gain rpms quickly, while torque is the ability to hold the same rpms while under a heavy load. Like the difference between acceleration and pull.

The truck pulls strongly at very low rpms. I use my truck as a fully loaded daily driver work vehicle, and am frequently in stop and go traffic. With a stick there's a lot of first gear clutching. On a level roadway I can slip the clutch from a standing start with no throttle and the truck moves smoothly with no bucking or dying out. I tested to see how low, and the breaking point of dying is if the rpms drop lower than 400-500 rpm which is below the idle speed. It runs like a tractor.

[cali yaris]

the intake manifold spacer lowered the torque peak by 2,500 rpm down to just 2,900 rpm.

With an LCE long tube header and this intake manifold spacer, the torque peak is reached at just 2,900 rpm

Is it the spacer alone or the header + the spacer? You've said two different things here. (I think I get the point, by the way).

[Golddeenoh]

Originally Posted by cali yaris

Is it the spacer alone or the header + the spacer? You've said two different things here. (I think I get the point, by the way).

it is magic :P

[tooter]

Originally Posted by Golddeenoh

it is magic :P

Nope. It's just longer intake runners that obey all of the laws of physics

[tooter]

Originally Posted by cali yaris

Is it the spacer alone or the header + the spacer?

Ok. From the beginning...

The first dyno run is with the header alone which lowered the peak torque from 3,800 rpms down to 3,150 rpms.

The second dyno run is with the addition of the spacer as the only change. It lowered the peak torque from 3,150 rpm down to 2,900 rpm.

[cali yaris]

You missed the point, Garm...
It doesn't make gains. It moves the torque curve lower in rpms.

I got it. The spacer lowered the peak torque by 250 rpm.

[tooter]

Originally Posted by cali yaris

I got it. The spacer lowered the peak torque by 250 rpm.

You got it, Garm.
And besides lowering the rpms of the absolute peak by 250... below that peak the tooter's torque curve is also fatter than the stock torque curve at other engine speeds, and it did it without giving up anything at the top end.

[tooter]

The first tooter II.VII production model has been machined...









Here's a vid of a dyno run...

http://www.youtube.com/watch?v=H6ofUy8_-6Q

It's an extremely low rpm 4th gear pull starting to record at only 1,400rpm and up to redline at 5600rpm.

Here's how the truck sounds on the road in 2nd and 3rd gear, from 25mph to 70mph. All that sound you're hearing is coming just from the intake alone, as it's running the super quiet factory stock muffler. Had to suddenly cut the run short as I was headed into a canyon curve.

http://www.youtube.com/watch?v=UFTl75q49e4

[tooter]

Finished the next tooter and put it on ebay.
Did a light polish job on the runners on this one...

[malibuguy]

Nice work. I love your passion in this subject.

Ive been lazy and havent used my tooter flanges yet.

[tooter]

You don't have to worry, Malibu... they won't spoil.

I think my next project will be to develop an intake manifold spacer for our Yaris'. The truck spacers work really neato.

Hey, could you do me a big favor? I don't have any stock intake manifolds any more, so could you measure exactly how much clear space you have between the front of your stock intake manifold and the first thing it would touch if it was moved straight out from the head towards the front of your car? That will help me to determine how thick of a spacer I can make.

The thicker they are the better they work.

Thanks,

Greg

[malibuguy]

2 7/8" from runner #4 to the fan shroud spoke on my sedan.

[CTScott]

Right about the same for my liftback: 2-7/8" to 3"

[tooter]

Hey, thanks guys!

That's great news... and means that a two inch spacer will work. The coiled stock intake runners are about 20 inches long if I recall correctly, so it would mean 10% longer runners. That's enough to make a noticeable difference.

Greg

[malibuguy]

Going to make in plastic as well?

[tooter]

Yes. Machining two inch deep aluminum caused tool issues. so they'll be made out of the same same nylon that the Yaris intake manifolds are made out of.

The spacer also straightens the flow before it enters the head...





My work truck is always loaded with about 600-800 pounds of material and tools, and I'm constantly crawling up and down steep roads in first gear so the spacer really helps in these off idle/very low rpm situations. Feels like you're driving a tractor. It'll be interesting to find out how it will work on our Yaris'. When it's made, I'll do dyno runs and we'll see what happens.

Greg

[malibuguy]

Try making one to run on a tooter as well...I dunno how much more room you can move the 'rolla intake out...but it may make magic or become a new doorstop...