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Dual Sniper setup is here #2667038
06/17/19 10:14 PM
06/17/19 10:14 PM
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Oregon
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AndyF Offline OP
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I need to do a little fab work before we can get this on a running engine but all the major bits are here. Should be interesting to see how it works. This is the first one I've seen.

DSC_3643 (Large).JPG
Re: Dual Sniper setup is here [Re: AndyF] #2667039
06/17/19 10:19 PM
06/17/19 10:19 PM
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North Dakota
Azzkikrcuda Offline
top fuel
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Should work good, FAST and FI Tech have had 2x4 setups out for awhile.


The only Carbs I care about are under the hood!
Re: Dual Sniper setup is here [Re: Azzkikrcuda] #2667093
06/18/19 07:23 AM
06/18/19 07:23 AM
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Tulsa OK
Bad340fish Offline
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Do the throttle bodies match or is one of them a slave? Curious if they have two IAC motors, TPS, etc. I run two of the holley 1000CFM throttle bodies on my tunnel ram and I like having the redundant sensors if needed.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Dual Sniper setup is here [Re: AndyF] #2667100
06/18/19 08:03 AM
06/18/19 08:03 AM
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East Aurora (Buffalo) NY
RoadRunner Offline
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I wonder how that would work on a Hemi cross ram?


68 Road Runner (383/4speed, post car w/decor pkg) - Major Project
69 Road Runner w/472 Hemi & 4 speed.
70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project
2023 Ford Mach 1
Re: Dual Sniper setup is here [Re: RoadRunner] #2667146
06/18/19 10:50 AM
06/18/19 10:50 AM
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north of coder
moparx Offline
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and i am wondering about all the responses so far, for a 446 with an original max wedge intake.
andy, if anyone can give honest results, you're the man ! up bow
looking forward to your outcome[s] !
beer

Re: Dual Sniper setup is here [Re: Bad340fish] #2667150
06/18/19 10:57 AM
06/18/19 10:57 AM
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Oregon
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AndyF Offline OP
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Originally Posted by Bad340fish
Do the throttle bodies match or is one of them a slave? Curious if they have two IAC motors, TPS, etc. I run two of the holley 1000CFM throttle bodies on my tunnel ram and I like having the redundant sensors if needed.


The front one is a slave on this setup. No IAC and no TPS. Also they removed the internal regulators so you have to run an external regulator. That isn't really a bad idea at this power level anyway. This isn't a Super Sniper so no fuel pressure or oil pressure sensor hookup which is a bit of a bummer.

Re: Dual Sniper setup is here [Re: AndyF] #2667157
06/18/19 11:14 AM
06/18/19 11:14 AM
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north of coder
moparx Offline
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as the setup contains a slave, my plan was to purchase the 2x4 setup of "???" manufacturer, then get the car sorted out with the main TB, then, switch over to the max wedge intake.
does that make any sense, and can that even be possible ?
beer

Re: Dual Sniper setup is here [Re: AndyF] #2667164
06/18/19 11:40 AM
06/18/19 11:40 AM
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NW Illinois
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MoonshineMattK Offline
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Very cool! I'm excited to see the results!

Re: Dual Sniper setup is here [Re: AndyF] #2667177
06/18/19 12:40 PM
06/18/19 12:40 PM
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S.E. Michigan
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Well now, that's getting pretty fancy smoke


Rich H.

Esse Quam Videri




Re: Dual Sniper setup is here [Re: moparx] #2667359
06/18/19 08:27 PM
06/18/19 08:27 PM
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Bitopia
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jcc Offline
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Originally Posted by moparx
as the setup contains a slave, my plan was to purchase the 2x4 setup of "???" manufacturer, then get the car sorted out with the main TB, then, switch over to the max wedge intake.
does that make any sense, and can that even be possible ?
beer


Does to me, Is a O2 sensor part of this package, that would seem to be the fly in the ointment in the an independent TR set-up, as it would be reading cylinders its not feeding, correct?


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: Dual Sniper setup is here [Re: jcc] #2667452
06/19/19 07:28 AM
06/19/19 07:28 AM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline
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THe 02 would read one bank or the other, so it would get data from both throttle bodies. I am sure the ECU controls them the same, no adjustment between the two. They share a common plenum anyways.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Dual Sniper setup is here [Re: Bad340fish] #2667471
06/19/19 09:03 AM
06/19/19 09:03 AM
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Sidney,Ohio
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challenger1320 Offline
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I am waiting on the 4500 sniper dual setup.

Re: Dual Sniper setup is here [Re: challenger1320] #2667495
06/19/19 10:22 AM
06/19/19 10:22 AM
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back in Georgia
dthemi Offline
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Originally Posted by challenger1320
I am waiting on the 4500 sniper dual setup.


Me too, curious how well it would work on a roots supercharger. I think they'd be awesome on a na tunnel ram, but might have to lie to them about AF on a blower given the distribution issues with roots.

Re: Dual Sniper setup is here [Re: dthemi] #2668973
06/23/19 10:07 AM
06/23/19 10:07 AM
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NYC
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Dartari Offline
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Hi Andy I would like to ask you a question fellow members I would like your opinion and input as well I have built a 512 to into my 63 Savoy with a Indy 440-25 cross ram I went this route because of the NSS rules of intake and carburetor requirements in some of the different associations it’s been well documented here and other cites of potential backfire and explosions of the intake and other potential issues this setup may have. My goals at the time I started has changed and I am more interested in running it at Atco’s 10.00 index and driving it on the street I see a potential benefit in running a dual sniper setup over my current dual 750 eddy carbs any input would be appreciated and welcomed

Last edited by Dartari; 06/23/19 10:09 AM. Reason: Grammar
Re: Dual Sniper setup is here [Re: Dartari] #2669016
06/23/19 12:15 PM
06/23/19 12:15 PM
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Oregon
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AndyF Offline OP
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Sure, if I had that Indy cross ram on an engine I'd put dual Snipers on it. I'd also add the Holley Hyperspark distributor so I had full computer control over both fuel and ignition timing. That is the only way I'd try to run that intake on the street. I don't know how well it will work but I'd think that dual Snipers would give you a fighting chance.

I'm not sure what makes those intakes backfire but it could be fuel puddling and/or vacuum leaks. Does your cross ram have a gasket between the top and bottom half? I had one of those intakes years ago and Indy didn't supply a gasket. So the intake wasn't sealed up in the middle. Not sure why Indy didn't make a gasket for it but perhaps they make one now? The Sniper setup might solve the fuel puddling since you don't have accelerator pumps to squirt fuel in. The amount of cranking fuel can be adjusted and the fuel prime can be turned down or turned off. With the Hyperspark ignition setup you can adjust the ignition timing while cranking which might also help.

Re: Dual Sniper setup is here [Re: AndyF] #2669705
06/25/19 09:20 AM
06/25/19 09:20 AM
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north of coder
moparx Offline
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that sounds like good advice for me as well, when changing over to my original max wedge intake. in my distant memory, i believe i have heard a story or two about a backfire problem, but i don't remember what the outcome was.
beer

Re: Dual Sniper setup is here [Re: AndyF] #2671355
06/28/19 11:00 PM
06/28/19 11:00 PM
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Concord California
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Evil_Ways Offline
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What's this going on? I'm very interested to see how this works out. I'm in the early stages of building a 493 (440) and I just picked up an M1 tunnel ram that I plan on using along with dual snipers and trick flow heads.

Re: Dual Sniper setup is here [Re: Evil_Ways] #2671489
06/29/19 11:06 AM
06/29/19 11:06 AM
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Oregon
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AndyF Offline OP
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It is going on a 505 with Trick Flow heads. The engine made over 700 hp with a single Sniper but was running out of air and fuel so we're interested in finding out what happens with the dual Snipers on there. I have a Weiand tunnel ram for the engine which will be a bit of a choke point since the engine has the 270 heads on it. I was hoping to round up a Indy tunnel ram with the MW ports but no luck yet.

Re: Dual Sniper setup is here [Re: AndyF] #2685881
08/09/19 01:07 AM
08/09/19 01:07 AM
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AndyF Offline OP
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As is usual for these types of projects we hit some snags along the way. We have the engine back on the dyno and ready to make some pulls with the dual Sniper setup so we'll see how it goes. So far we've baselined the engine with both a big QuickFuel carb and a single Sniper setup. The carb + MSD pro billet distributor made 715 hp while the Super Sniper 650 with matching Hyperspark distributor made a best of 710 hp. The Super Sniper is rated at 650 hp and it was really pushed to the limit on this engine with injector duty cycle well past 90%. Basically the injectors are on all the time when the engine is past 6000 rpm.

The Sniper is rated at 800 cfm while the QuickFuel carb is rated at 1050 cfm. The engine was using 920 cfm during the pulls according to the mass air flow setup so I'm a little surprised that the power difference was so small. I'm assuming that the dual Sniper setup will solve the airflow and fuel flow issues but we do have a bit of a curve ball hidden in the test since we're using a standard port Weiand intake on Max Wedge heads. It is a long story but basically I wasn't able to source a Indy tunnel ram with in-line 4150 carb pads. I know they exist but none of my usual contacts were able to come up with one so we modified a Weiand standard port tunnel ram to work.

Re: Dual Sniper setup is here [Re: AndyF] #2685937
08/09/19 09:42 AM
08/09/19 09:42 AM
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So. Burlington, Vt.
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Be interesting to see how it pans out, but I’d expect that motor to peak pretty early with the Weiand TR on it.
They always have on all the stock stroke stuff I’ve run them on.

Couldn’t just get the Indy TR with a blank top?

I know they don’t get much luv, but the Mod Man intake is available with MW ports and the in line 4150 top.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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