Club Cobra - Pro-Systems

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- Pro-Systems Carburetors (http://www.clubcobra.com/forums/pro-systems-carburetors/)

- - Pro-Systems (http://www.clubcobra.com/forums/pro-systems-carburetors/65680-pro-systems.html)

I have a general question, on your website you have street and rod type carbs, and Competition style carbs eg Blaster 950 etc,
I realise the Competition is more responsive etc to do the job on the track, but as far as going down the highway at cruising speed with either of the two carb applications is there any great difference in the already poor economy?

I suppose primary jetting may come into this if one wanted to change jets between road and track?

The best thing to do is be realistic on what your goals are with your program.

For example in our SCCA Trans Am series carburetors we have versions that get better fuel mileage for less fuel burn and weight percentage loss as the race progresses.

Although the wide open throttle program will still make great power, the improved part throttle fuel economy program does affect instantaneous throttle response. However, the reduced fuel burn keeps the chassis settings/percentages more consistent as the race continues and the car doesn't get loose as the race continues.

We used this design concept to complete a whole race in the SCCA series without a fuel pitstop (they had recently introduced a reduced fuel cell size in order to mandate pitstops). The rest of the field was required to pit for fuel, we were not (this drove the tech guys crazy looking for a hidden fuel tank, which did not exist), this minor loss in throttle response gave us a major advantage in passing by the "fuel can guy". So thats what you want to do, is weigh your options. You can get mean with the response and lose some fuel mileage or you can lay it back and get better cruise mileage at a slight loss in throttle response.

If you want the horses to run, you gotta feed 'em hay. : )

Thanks I will leave in the capable hands of my engine builder!

Just one point I know he is going to use one of your carbs 950, I am talking part throttle here say at 3200rpms cruising, not laying into it.

But I am building the car for performance and it will need the hay, I thought at part throttle it would only be getting what it needs!

Pro systems carbs are great! My friend Jon Hartline had them build him a carb for his 406 Mustang drag car. Bolted it on the car and it really pick up the ET's with no adjusting! After I get all the things bought for the Cobra I want I am going to let them build one for my 87 LX drag car! Mark