300whp 951 on a budget

[MoeMonney]

Is there an aftermarket snorkel available? I read of a carbon fiber option a company made but don't think they make them anymore.

[Tom]

Is there an aftermarket snorkel available? I read of a carbon fiber option a company made but don't think they make them anymore.

I don't know if any. It would need to be combined with a new air filter box lid. The lid has the opening for the stock snorkel, and that opening would prevent a bigger snorkel from adding much, if any, additional flow.

[86Porsche951]

I just had to have the turbo rebuilt on my 86 and I used Tim’s Turbos out of Virginia. He machined the hot side and added a wheel that matched the cold side. What a difference in lag time and throttle response. I know a new Wastegate and MBC will help immensely but I chose to do the Lindsey master hose kit and upgrade the ignition wires cap and rotor and this all started because the cam housing gasket was leaking again. I would give Tim a call and talk to him about rebuilding the K26/6.

[Spencan]

"Is there an aftermarket snorkel available? I read of a carbon fiber option a company made but don't think they make them anymore."

I just heard back from ETG via email and this is what he said regarding the snorkel:

"We can ship the snorkels for 450 Euro. I have to check the shipping cost as they are expensive.
At the moment they are out of stock. They will be available again in march.
As a friend is flying to Florida in april, he could take a snorkle and send it from there. This would be much cheaper."

[Tom]

The pinch point on the factory snorkel is the small, triangular, cross-sectional area where the snorkel slides into the air filter box. From what I see, this ETG snorkel does not address that, so I would not expect a meaningful increase in flow. When the corvette had a similar restriction, their solution was to take the top off the filter box and zip tie the filter in place. From a pure performance perspective, doing that and/or drilling holes in the air filter lid would offer much better flow.

[Thom]

@Tom
Are you sure? The last time I used a piece of string to evaluate the variation of circumference of the snorkel, the triangular section was the largest and the bottleneck was clearly upstream. I am pretty sure the ETG unit adresses this.

FWIW at least, as it's a very long time since I have had a factory snorkel in hand.

ETG does good stuff. He has rewritten the Motronic code to replace the AFM with a MAP sensor and probably still has one of the fastest road going 951 ever, the last time I heard with 600 hp out of a 3l 8V. It was making "only" 500 hp when I drove it before he started playing with cam profiles but was bonkers fast already.

[Tom]

@Tom
Are you sure? The last time I used a piece of string to evaluate the variation of circumference of the snorkel, the triangular section was the largest and the bottleneck was clearly upstream. I am pretty sure the ETG unit adresses this.

FWIW at least, as it's a very long time since I have had a factory snorkel in hand.

ETG does good stuff. He has rewritten the Motronic code to replace the AFM with a MAP sensor and probably still has one of the fastest road going 951 ever, the last time I heard with 600 hp out of a 3l 8V. It was making "only" 500 hp when I drove it before he started playing with cam profiles but was bonkers fast already.

I measured a long time ago and concluded that it was done in a very Porsche way, where the air box opening was 'big enough' for the tube, but just barely. I imagine air restrictions are a cumulative affair, so if the ETG opens up the tube, I'm sure it reduces the overall restriction. The 968 Turbo S essentially cut off the tube, presumably for the same reason. So I was probably too hard on that snorkel with my comments. That said, if ETG did not open up the triangular inlet section, I do believe (based on the cross-sectional area, but no flow data) that's still a meaningful restriction and that the corvette approach would outflow it.

[Thom]

For the 968T and from what I can remember of the under hood layout they probaby chose to get an air feed from the hood because of the lack of room for routing any sort of snorkel. Isn't the AFM inlet smaller than the air box cover inlet anyway?

[Spencan]

Here’s some more snorkel information from them:
It’s a carbon fiber snorkel for $450.