Anderson Engineering Manifold Spacer

They help increase airflow through the throttle body on really old carb and fuel injection systems. They have basically no affect on modern fuel injection systems.

 

Ah, thank you.

 

Thanks.

 

@shotgunbilly420 installed one a little bit ago. Review was good. Maybe he will chime in. I believe @PapaRee will change the tune up a bit if you have one of these and a KDMax tune.

 

I think youre confusing this spacer with a throttle body spacer which definitley does not do anything on modern engines. This spacer sits below the intake plenum ontop of the intake runners.

 

Ya and increases air flow and extends the runner for air flow which ultimately does dick. OK a dyno would probably show negligible change.

 

Anyone asked them to provide a dyno graph? Certainly would be nice to see one.

 

They have one on there instagram page

 

Watch kdmax tread for dyno results on aftermentioned user. He did the dyno but no results available

 

Its not about "increasing airflow" exactly, it is about more cylinder filling however, longer runners have a lower frequency resonance response which moves the constructive frequencies lower. Like a 2 stroke pipe.

High RPM, high frequency, short runners. Low RPM, low frequency, long runners.

There is also something to be said for the moving airmass.

Couldn't tell you if this one is effective on this engine but intake runner length plays a BIG impact in where the powerband is. Similar effect as long tube vs shorty headers.

This is why you see long runner intakes on chevrolet LS truck motors and short runner intakes on LS performance car motors. I don't think this intake is different from the minivan intake so this mod, if it works, would do the same thing and tune the powerband to be "more truck like".

 

Some excerpts from various instagram posts:

• "It allowed the truck to reach it peak torque at 1000 less rpms and within that lower rpm range gave +18 ft.lbs and +8 hp more. But everything is a give and take, it did lose 6 total hp at 6000+ rpm but it is typically rare for everyday drives to bewithin that rpm range"
• Dyno results below, for which they say "The top chart is before and the bottom chart is after with the spacer."

As a MT owner, this claimed shift in peak torque in lower RPM would be game changing. Again, it just seems too good to be true. If it was true, wouldn't we all be queuing up for this 'must have' mod?

(I should caveat that my knowledge level of mechanical engineering should be considered as below peasant-level, hence posting here for wisdom and advice).

 

Sooo if this thing is so great and brings the power band down, why didn’t Toyota install it from factory.

 

I've been around tons of dynos in my lifetime. That dyno graph looks like it was generated on a cell phone app lol. Plus, why does it say Top RPM 18837. Its not an F1 car lol.

 

Interesting the address on the page is a small house….

 

Every dyno graph I've seen of this spacer is completely wrong. They don't start the pulls at the same RPM, rendering the tests completely useless.

You need to dyno the truck back to back, same day, and start the pulls from WAY low in the RPM band.

IIRC their "after" dyno graph was started MUCH earlier in the RPM band, so their spike that they claim adds torque was in an area not even tested on the "before" dyno graph.

18ft lbs would be great, if it was consistent through the RPM band or at least more than a brief surge for 1000rpms at best.

Carry on.

 

Yeah this all sounds a bit fishy. I'll be waiting for more independent verification before I even place myself on the fence for this.

 

Tacomaworld has dozens of dynos for the stock motor, comparions of 4.0 vs 3.5, y-pipes etc and they all basically show the the 3.5 generates like 95% of its torque at 2600 rpms and peaks at about 3300rpm.

Anyone here can run a quick googlesearch for Tacomaworld Dynos and see that the numbers here dont align align with the others we have.

 

Cost

Why make a new part when the one you have is "good enough".

Toyota isn't exactly known for throwing money at these trucks.

 

Have any dyno results to show? I couldn't see any rpm on the one posted.

You are correct that the runs should be on the same truck and on the same day but there are corrections you can apply. Aside from that a value at any rpm doesn't change based on what rpm you started the run at.

 

They posted them somewhere in the past.

It absolutely does change. If you quote 18ft lbs increase at 2300rpm but don’t start the before dyno graph til 3200rpm, numbers mean nothing. That’s why you can’t compare dyno graphs, all dyno graphs read differently. You must compare the same truck, same day, etc.