13 replies to this topic

[Litre8]

The power turtle's I recall seeing advertised quite a while ago actually looked like a turtle. They were made of metal and were designed to be epoxied onto the manifold floor, below the carb. The idea was they helped with mixture distribution by creating some turbulence and preventing fuel pooling in the manifold.

[Litre8]

Hard to work out what its meant to achieve, maybe a stronger vacuum signal to the carb courtesy of the extensions?

[Struggler]

It is a fairly average attempt to reduce turbulance where the air and fuel leave the carb base and enter the manifold plenum. You can purchase blended 1 and 2" spacers that do a better job (marketed as Super Suckers or similar). As to whether they work or not that depends on your combo. They seem to work best on engines with too much plenum volume.

Hope this helps.

[arrimar]

while on the plenum volume subject and the shape of the maxi-torque manifold, there is a train of thought that says the "hump" in the chamber restricts fuel to the rear of the engine whilst only operating on the primary side of the carb.

any thoughts struggler?

[Litre8]

When in doubt add in a fuel pressure gauge to see if your pump is up to scratch if that's what you mean?

[Struggler]

while on the plenum volume subject and the shape of the maxi-torque manifold, there is a train of thought that says the "hump" in the chamber restricts fuel to the rear of the engine whilst only operating on the primary side of the carb.

any thoughts struggler?

I have only ever used the Maxitork on forced induction engines. In this application they work well (due I believe to the turtle).

I have found that by removing the Maxitork from an aspirated engine and fitting a standard manifold with an adapter, torque is improved markedly. I would never use one on a naturally aspirated engine.

As an aside, if you thought the turtle was hurting fuel distribution then add a spacer. This will fix it.

[Struggler]

In order for the secondaries to open on say a Holley (non mech secondaries) the engine needs load and vacuum which would be produced quicker if there was no restriction of fuel from the primaries. So yeah, it would be an issue when running down the quarter. Does that sound about right?

I assume you are talking about a vac. sec. Holley ?

The secondaries are not activated by manifold vacuum (this is a common misconception). They are activated by vacuum created in the venturi by high air speed through the carb. This normally occurs when there is little to no manifold vacuum.

Yes the engine must be loaded to create enough air speed through the carb. You won't get them to open on a free rev.

If I haven't answered your question please be a bit more precise.

Hope this helps.

[arrimar]

when you say standard struggler,you are implying holden yeah?

Edited by arrimar, 27 April 2007 - 09:20 PM.

[Struggler]

when you say standard struggler,you are implying holden yeah?

Correct.