Scott injection hat

Like the name says...

Scott injection hat

Postby rhoads56 » Fri Dec 02, 2011 3:14 pm

Hey guys, just looking for someone who has used the new style Scott Super Slot injection hat. I see they are offering an EFI version, with claims it's good for the street. Anyone used one in a real world situation??

This would be for a show/street car running gas (or petrol as we call it).

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Re: Scott injection hat

Postby MFP1 » Tue Dec 06, 2011 5:50 pm

I know Mark S in NY uses one. Also Dave J in California. Both have everything good to say about it.
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Re: Scott injection hat

Postby rhoads56 » Tue Dec 06, 2011 9:23 pm

Yeah from what I can tell, it all looks like it's an easy setup.

Ive found an vintage Scott, just working out if it's worth it going that direction or new...
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Re: Scott injection hat

Postby MFP1 » Wed Dec 07, 2011 2:17 pm

rhoads56 wrote:Yeah from what I can tell, it all looks like it's an easy setup.

Ive found an vintage Scott, just working out if it's worth it going that direction or new...


The original Scott hats are a butterfly plate with far less controll over fuel delivery. If you are building a dragster for always wide open throttle it is an ok option, but not very workable for street applications. I would lean toward the EFI for that street/strip type of use, much more versitile with the computer controll and injectors.
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Re: Scott injection hat

Postby .MAD MAX. » Wed Dec 14, 2011 5:21 pm

I talk with Mel Scott regularly....a vintage unit could be made to work for the street obviously but far from practical. Dave J in Cali is the guy that makes the EFI units and i know mark has had some good times with his unit. Shelve the vintage unit and do the EFI thing
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Re: Scott injection hat

Postby toecutter » Wed Dec 14, 2011 10:46 pm

Fitting racing kit to street cars is fraught with problems. I had an undriveable car with a 351c with holley 750cfm mechanical secondaries. Changing to a 650 cfm with vac sec made the car enjoyable. If i was on a speedway the mechanical secondaries would have been ideal.

If the new era Scott has efi then that solves a whole lot of problems.
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Re: Scott injection hat

Postby rhoads56 » Fri Dec 16, 2011 4:21 pm

Hey guys, yeah no matter which way I go (old or new) it will be EFI. Im not too sure about the new Scott EFI system though, it really doesnt have the ability to really play with the fuel maps... its all based on turning some knobs and getting it 'rough enough seems good enough'. Im sure that it works good enough, but fuel injection should be able to be programmed perfectly, not 'good enough'. EG: there appears to be no provision for cold starts. For only a small amount more $$$ (less than the Scott EFI + timing setup), I can have a system which controls many more parameters, including ignition, timing, and feedback from oxygenair temp/etc/etc sensors. Also, there is no way of loading up two different tunes, eg: one for high boost, one for low.... different fuel octane quality... or even "with blower/without blower"

At this stage, Im looking at a 16 nozzle plate under the Scott (so I can use any old scoop, it's just I prefer the look of the Scott), which sits over an 8/71, and 572ci.
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Re: Scott injection hat

Postby MFP1 » Tue Dec 20, 2011 3:11 pm

rhoads56 wrote:Hey guys, yeah no matter which way I go (old or new) it will be EFI. Im not too sure about the new Scott EFI system though, it really doesnt have the ability to really play with the fuel maps... its all based on turning some knobs and getting it 'rough enough seems good enough'. Im sure that it works good enough, but fuel injection should be able to be programmed perfectly, not 'good enough'. EG: there appears to be no provision for cold starts.


Actually that is not the case. You need to talk to Dave J about the full details, but I know it has one of the newest and best EFI computers that there is, and has full controls of almost all the pramaters, I am pretty certian is has all the ignition, timing, and feedback from oxygenair temp/etc/etc sensors. Also, there IS a way of loading up mulitple different tunes [eg: one for high boost, one for low or different fuel octane quality etc].

Well worth a few minutes of your time to ask.
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Re: Scott injection hat

Postby the armourer » Tue Dec 20, 2011 5:39 pm

toecutter wrote:Fitting racing kit to street cars is fraught with problems. I had an undriveable car with a 351c with holley 750cfm mechanical secondaries. Changing to a 650 cfm with vac sec made the car enjoyable. If i was on a speedway the mechanical secondaries would have been ideal.


I've always run mechanical secondaries on the street. I just don't get the same throttle response with vacuums. Ran a 750 on the 340 and the 383 and a 850 on the 440 before that. My buddy Dave is an artist with tuning Holley Double Pumper's. I'm looking for a good 700 or 750 if anyone wants to part with one.
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Re: Scott injection hat

Postby toecutter » Wed Jan 04, 2012 4:59 am

the armourer wrote:I've always run mechanical secondaries on the street. I just don't get the same throttle response with vacuums. Ran a 750 on the 340 and the 383 and a 850 on the 440 before that. My buddy Dave is an artist with tuning Holley Double Pumper's. I'm looking for a good 700 or 750 if anyone wants to part with one.


I suspect that could be part of it. i'm more comfortable tuning vac sec carbies. i persevered for a few weeks with the mechanical sec carb, but finally just went with what i know best - and to be honest, its much better on the street, and on long drives.

i might still have it in the garage, i will have a look - shipping would be a bitch though. :shock:

recently ive been fooling with straight lpg (propane) on a 351 Windsor. its fast becoming my new love. :mrgreen:
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