Paxton Blower and Sniper EFI - Vintage Mustang Forums

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post #1 of 11 (permalink) Old 05-12-2017, 01:37 PM Thread Starter
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Paxton Blower and Sniper EFI

Hello, everyone! I just finished my install of Paxton's entry line blower for our cars, the Novi 1200SL. I'm running a blow-through setup with a Holley Sniper EFI. I just wanted to throw this up here not only because I'm really excited with the results, but other people may be wondering how well it works. It's pretty impressive... very fast Still lots of work to do, but I'm very pleased. The kit was a super easy install and only took a few hours with a buddy.
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Boom and 67Modcoupe like this.

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post #2 of 11 (permalink) Old 05-12-2017, 01:57 PM
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Looks nice. I'm running a vintage paxton unit on mine. I've been wanting to try that carb hat. I like the way they look. Have fun.
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post #3 of 11 (permalink) Old 05-12-2017, 03:32 PM
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Here is an 8 injector Sniper making 1100 HP.

STEVE MORRIS ENGINES BOOSTED SNIPER 8 INJ Testing
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post #4 of 11 (permalink) Old 05-12-2017, 06:18 PM
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Did you have to do anything special to run the Sniper with the blower?

-Brett
1968 Mustang coupe 5.0/T5
FiTech EFI
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post #5 of 11 (permalink) Old 05-15-2017, 10:47 AM Thread Starter
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Originally Posted by Boom View Post
Did you have to do anything special to run the Sniper with the blower?
I reset the EFI and allowed it to self tune again. I'm only running about 5-6 lbs of boost, and it is handling it out of the box. I read a lot of stuff back and forth with some people saying you needed a software update, and others saying it would work out of the box, so I decided to just try it and see. It works great!

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post #6 of 11 (permalink) Old 05-15-2017, 11:27 AM
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How is the A/F ratio when you get it under full throttle?

Darreld
1968 Convertible

333 with 555 rwhp and 486 rwtq, EFI, Vortech V2 trim blower with 11.5 lbs of boost, H2O/Meth Injection, T56 6 speed, JMC clutch, Steeroids rack, Ron Morris Front and TCP G-bar Rear Coilovers, Cobra brakes, NewGen wheels. Basically a money pit. http://www.youtube.com/watch?v=zrqA9...ature=related#
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post #7 of 11 (permalink) Old 05-15-2017, 12:34 PM Thread Starter
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Originally Posted by 68EFIvert View Post
How is the A/F ratio when you get it under full throttle?
I have the target set to 13.5, and it sticks very close to that number, even under WOT. Initially, it went a little lean and then corrected, but it seems to anticipate it now. I've been keeping an eye on it, and it's doing a great job.

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post #8 of 11 (permalink) Old 05-16-2017, 11:31 AM
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That is good to hear. I have always wondered how fast these systems "learn". Was it before or after you blew up your engine? LOL!

Darreld
1968 Convertible

333 with 555 rwhp and 486 rwtq, EFI, Vortech V2 trim blower with 11.5 lbs of boost, H2O/Meth Injection, T56 6 speed, JMC clutch, Steeroids rack, Ron Morris Front and TCP G-bar Rear Coilovers, Cobra brakes, NewGen wheels. Basically a money pit. http://www.youtube.com/watch?v=zrqA9...ature=related#
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post #9 of 11 (permalink) Old 05-18-2017, 10:02 AM
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What you doing about timing?

1965 Mustang
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post #10 of 11 (permalink) Old 05-22-2017, 11:49 AM Thread Starter
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What you doing about timing?
There was a slight ping at partial and wide open throttle, so I retarded the timing a bit until it quieted down.

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post #11 of 11 (permalink) Old 05-22-2017, 11:49 AM Thread Starter
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Originally Posted by 68EFIvert View Post
That is good to hear. I have always wondered how fast these systems "learn". Was it before or after you blew up your engine? LOL!
Before, mercifully! It seems to learn the big stuff very quickly, then spends more time fine tuning.

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