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Holley Sniper 2GC EFI proof of concept
Posted by: hjackson3149 ()
Date: May 29, 2020 04:00PM

good evening all

here is a link to the first start of the Holley sniper 2gc (2bbl) EFI
on my 69 110 pg.
fired up first try and sat there and idled, more to come

[photos.app.goo.gl]

Hank Jackson
South Florida
69 Monza PG
everybody has to believe in something and
I believe I will have another.
one for the Road!

hank_jackson@hotmail.com


The Three Stages of Christine

;;

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: MattNall ()
Date: May 29, 2020 04:15PM

Great Results!

How high is the fuel pressure?I couldn't read the gauge.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: hjackson3149 ()
Date: May 29, 2020 04:30PM

60 lbs

Hank Jackson
South Florida
69 Monza PG
everybody has to believe in something and
I believe I will have another.
one for the Road!

hank_jackson@hotmail.com


The Three Stages of Christine

;;

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: 63turbo ()
Date: May 29, 2020 07:58PM

Heck of a job!!

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Holley Sniper 2GC EFI proof of concept
Posted by: wv-geo ()
Date: May 29, 2020 08:26PM

How did you handle the water temperature gauge?

Dan Stark
Hurricane, WV

1961 Lakewood 500, 80HP, PG
1964 Corvair 500 Coupe, 140HP, 4spd (Christine)
1965 Mustang Coupe, 6cyl, 3spd

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: OttawaCorvairGuy ()
Date: May 29, 2020 08:50PM

Sounds nice. thumbs up

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: Seth Emerson ()
Date: May 29, 2020 11:42PM

Are you using the Sniper to control ignition timing?

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: FLSteve ()
Date: May 30, 2020 05:32AM

Looks and sounds great Hank. This car has unique history and an owner that has taken this car into the modern times. The work Hank does is top notch and I am always enjoying seeing his modifications.

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: hjackson3149 ()
Date: May 31, 2020 11:40AM

good afternoon all

a little update
put around 30 miles on the generic base tune not perfect by any means but runs better then it ever did with carbs.waiting for programming cable to arrive and will be getting into the fun part

Dan
we used brass fittings , 1/8 nipple rethreaded to the size of the shroud bolts,
and threaded the inside of nipple to 1/4 20 bolt size and plugged the bottom of nipple then 1/8 to 7/16 adapter then a 7/16 to 3/8 ( size needed for sensor )
filled the now made adapter with light tool oil and heat shrunk the whole thing but the sensor with marine heat shrink. it is installed on the pass side right behind the intake port,its working great temp runs from around 155 to 180.

Seth
not yet was going to give you a call and discuss if a magnetic pickup can be used with a stock dist or if one of your dist could be made to fit with ac.
do plan on it as soon as i figure that out

more to come

Hank Jackson
South Florida
69 Monza PG
everybody has to believe in something and
I believe I will have another.
one for the Road!

hank_jackson@hotmail.com


The Three Stages of Christine

;;

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: TedBrown ()
Date: May 31, 2020 12:17PM

Great Job Hank,

My first design was as a center mount and the sniper really simplifies the design and looks good. Interested in the icing issue EFI vs Carb.

Tuning is the fun part. Keep us informed.

Ted

**NEW** Dual TBI KITS are now available through Clarks Corvair 1 Jan 2021
**2 & 4 TBI units are available through Corvair-EFI.com
Ted Brown
Anderson, SC
[www.Corvair-EFI.com]
Brown Injection Facebook
68 Monza Convert Auto - EFI
61 Loadside - PGlide - EFI
61 Rampside - 4 speed - EFI
61 Greenbrier 4 speed - EFI
61 Greenbrier 4 Speed - Bad Motor

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: Brizo ()
Date: May 31, 2020 01:37PM

hjackson3149 Wrote:
-------------------------------------------------------
> good afternoon all
>
> a little update
> put around 30 miles on the generic base tune not perfect by any means but runs better then it ever did with carbs.waiting for programming cable to arrive and will be getting into the fun part


hjackson, from your desription above, the basic Sniper tune must be real close as is, or your carbs were way off. Would you elaborate please? Thanks

Dan Brizendine, Circle City Corvairs
'64 8 door Greenbrier, +.060 stroked 186 ci.140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"



Edited 1 time(s). Last edit at 05/31/2020 01:37PM by Brizo.

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: hjackson3149 ()
Date: May 31, 2020 04:36PM

good evening all

Ted

89 degrees and 70% humidity hit the key she came to life and within 30 seconds was frosting the runners. didn't really notice how long it took to go away
will see next time but did not seems to effect startup or Idle

Hank Jackson
South Florida
69 Monza PG
everybody has to believe in something and
I believe I will have another.
one for the Road!

hank_jackson@hotmail.com


The Three Stages of Christine

;;

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: Seth Emerson ()
Date: May 31, 2020 08:20PM

Hank - It sounds like you are close as is. The only issue for using my distributor to control timing is that clearance from the A/C mount. I don't think it will clear the low mount compressor like you have for the Sanden unit. Because it won't clear the Sanden unit on my Corvair motor.<grin> - I am considering changing to the high-mount bracket kit from Clarks for mine, so I can clear the distributor. That said, you might be able to install a Chrysler 6-cylinder pick-up inside the stock distributor. I built a dozen of them back in the 70s. The pulse would be fine. You would have to lock-out the advance, not too hard of a job. Years ago, when I started handling the Stinger distributors, I sent all my Chrysler stuff to Bob Coffin in NC. He may still have enough to build one. basically, you remove the part of the points plate that the points mount onto, and throw it away. The magnetic pickup is mounted on the lower plate. You take the points cam and grind the tips off - on a lather or grinder, I don't think you could do it by hand. Then press-on the reluctor, with one of the reluctor tips lined up with the rotor tip. That is about it.(as long as you have locked out the advance.) Use a good rotor and cap, and plug the two-wire output into the Sniper! With the advance locked out, you are basically using the distributor as a crank trigger. Call me if you want to talk about it. Seth

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: v8vair ()
Date: June 01, 2020 04:57AM

The Long tubes will always be and issue with the Carb or any FI with the injectors in the throttle body on a center mount. Untill the injectors are in the log or at least at the base of the center mount tubes its going to frost. Maybe it can adjust the mixture to compensate till it gets some heat ???

1965 Crown V8 Racer
1964 Bill Thomas Monza Replica Racer
1964 Spyder Street Car
1979 Mazda RX7

Mike Levine

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: diegocorsa ()
Date: June 01, 2020 08:02AM

I run a center mount with the heated oil chamber under it and have no frosting issues....

-Cory
'66 Corsa
Nebraska

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: American Mel ()
Date: June 01, 2020 09:12AM

Heated, or unheated, frosting of the tubes is NOT a problem!
Over the years, people have heard the term Carb Icing, and have mistakenly identified frost on the runners as a bad thing.
The only time a cold manifold is an issue, is if all the little variables come together, to create The Perfect Storm, and you have actual FUEL freezing.
Does not seem to actually happen as often as the reputation claims.
Hmmmm, seems to be a familiar Corvair theme right there. eye rolling smiley
I have run my center-mount unheated year-round without any adverse affects.
Here is a picture of it sitting by the Seashore in 26* weather. Yes, I drove it there, and to work every day that winter.
Considering he is in Florida, I doubt Hank will have any problems.

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
Have; '66 Monza Coupe - 140, 4-spd. Daily driver beater
'67 Monza Vert. - 140, 4-spd. Daily driver beater
'67 A/C Moredoor Monza
Have had; '61 Monza coupe, 80hp, PG
'62 Monza Wagon, 4spd.
'63 Spyder,
'65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dually, approaching 400K
'03 Honda Del Sol
17'Terry
[corvaircenter.com]

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: hjackson3149 ()
Date: June 01, 2020 01:58PM

good afternoon all

FLSteve thanks for the kind words they help keep me going.

as for the frosting tubes I don't believe it will be a problem,
ran well with them frosted. that is the last thing to worry about
as said I live in South Fla

Hank Jackson
South Florida
69 Monza PG
everybody has to believe in something and
I believe I will have another.
one for the Road!

hank_jackson@hotmail.com


The Three Stages of Christine

;;

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: 63turbo ()
Date: June 01, 2020 06:19PM

On an EFI car, it doesnt matter if the tubes get frosted up. In open loop, the fuel numbers are rich enough to compensate for the lack of evaporation, and the fuel droplets leaving the injectors are small enough that they generally stay mixed with the air (if the injectors good aiming). When the engine is warm enough to be in closed loop, then the sensor information is used to correct the fuel mixture to vary based on load... generally to be around 14.7:1 under light loads, around 13.5:1 at moderate loads and 12.5:1 under hard loads, and on turbos, 11.5:1 when into boost.
On a carbureted engine, when manifolds get frosted up? it USUALLY doesnt matter either, although if the carb gets too cold, then the jets start to ice up and then the engine will begin to skip. My weber used to get frosty every time when it was cold out, and never had a problem even in the winter, except for one time when I was experimenting with a richer primary jet... it brought on a lean skipping. Back to the more normal jet the problem went away and never came back. The ice comes from the water in the air, and not "frozen fuel".
Aweseome job Hank!! EFI is a lot of fun!!

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Holley Sniper 2GC EFI proof of concept
Posted by: hjackson3149 ()
Date: June 30, 2020 07:43AM

good morning all

a little update

spent this weekend running her in all kinds of situations
heavy traffic light traffic highway speeds, stop and go
the temps were in the 90s and we ran the ac continuously.

had been having a restart issue after running for awhile and then stopping for a while for lunch or gas etc. the temp averaged between 175 and 190.
but after stopping she would heat soak the temp up to 240 or so and the sniper wasn't quite sure what to do with that, tuned around it all was well again.

idles between 650 and 700 in gear and the ac on, nice and steady

throttle response is excellent and she pulls real good.
still not using the sniper to control the timing yet.

will work on that this weekend.

will be back

Hank Jackson
South Florida
69 Monza PG
everybody has to believe in something and
I believe I will have another.
one for the Road!

hank_jackson@hotmail.com


The Three Stages of Christine

;;

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Re: Holley Sniper 2GC EFI proof of concept
Posted by: Paulsgt ()
Date: June 30, 2020 08:02AM

Wow! Beautiful installation!

Enjoy the Corvair!

Paul Sergeant
CORSA Central Division Director / CORSA Treasurer
Lee's Summit, MO
CORSA since 1975
Member – HACOA, Corvair Minnesota, CORSA, Little Indians, POCI


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