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Re: Dual Sniper setup is here [Re: fast68plymouth] #2685961
08/09/19 10:42 AM
08/09/19 10:42 AM
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Oregon
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AndyF Offline OP
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Just a matter of economics. It isn't my engine and the owner isn't in position to buy a bunch of intakes just for testing. He doesn't want to run a Mod Man on his car so no point in buying one. I've run the Weiand TR before and it does peak pretty early with the long runners but I had one available so we used it. I tried to buy a Indy TR but they never returned my calls so eventually I gave up on that. The Indy TR would probably be the best intake for this engine but I that shipped has sailed as far as the next round of testing is concerned.

Re: Dual Sniper setup is here [Re: AndyF] #2685993
08/09/19 11:40 AM
08/09/19 11:40 AM
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Tulsa, Oklahoma
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Originally Posted by AndyF
I tried to buy a Indy TR but they never returned my calls

OMG I am shocked!

My first rule of dealing with Indy is don't deal with Indy, go through a good dealer.

Re: Dual Sniper setup is here [Re: fast68plymouth] #2686063
08/09/19 02:48 PM
08/09/19 02:48 PM
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So. Burlington, Vt.
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What intake was used for the single 4bbl testing?

Some of what I’ve seen written by more than one of the true gurus of manifold porting is that they don’t even flow them anymore. They’re more concerned with the csa, taper, length, etc.

That being said, when I was playing around flowing manifolds on a head, and seeing how much they would knock the flow down.......on a std port SR head flowing about 340cfm, a Weiand TR with some minor matching and plenum clean up cost about 30cfm on that SR head.

With the combo of the std port manifold on the MW size TF270 head you not only get the restriction of the small intake runner of the manifold, but the big change in csa/poor transition as the air enters the head.

I’m definitely curious to see how it works out.
Sometimes things that seem like they’d be a big problem in terms of power, aren’t.
And sometimes things that seem trivial make a pretty big difference.

On something in the 850hp range, going from an Indy 440-2 with a 4150/4500 adapter and an 1150 carb to the Indy TR with 2x1050’s is worth about 35hp.

On a 650hp 451, going from a TG4500 with an 1150 on it to the Weiand TR with 2x650 Demons was worth about 30hp.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Dual Sniper setup is here [Re: fast68plymouth] #2686305
08/10/19 04:44 PM
08/10/19 04:44 PM
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We used a ported Indy 440-2 intake for the single 4bbl testing. The big QF carb made a little more power than the Sniper up top but the Sniper made more torque down low. Personally I'd run the Sniper on an engine like that even though it gives up 10 hp at WOT since it works better in the range that the engine will be driven.

DSC_3711 (Large).JPGDSC_3696 (Large).JPG
Re: Dual Sniper setup is here [Re: AndyF] #2692223
08/28/19 10:34 AM
08/28/19 10:34 AM
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central il.
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Any updates?

Re: Dual Sniper setup is here [Re: second 70] #2692320
08/28/19 02:34 PM
08/28/19 02:34 PM
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Had an issue with one of the Snipers so we're waiting for a replacement. Should be back on the dyno in a couple of weeks.

Re: Dual Sniper setup is here [Re: AndyF] #2718694
11/23/19 05:07 PM
11/23/19 05:07 PM
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Originally Posted by AndyF
Had an issue with one of the Snipers so we're waiting for a replacement. Should be back on the dyno in a couple of weeks.


Updates?

Re: Dual Sniper setup is here [Re: second 70] #2718707
11/23/19 05:52 PM
11/23/19 05:52 PM
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Originally Posted by second 70
Originally Posted by AndyF
Had an issue with one of the Snipers so we're waiting for a replacement. Should be back on the dyno in a couple of weeks.


Updates?


Never did get the dual Sniper setup to run. Tried them on a different engine and still had problems. Switched back and forth between carbs and the dual Snipers and the carbs worked but the dual Sniper setup didn't. Came to the preliminary conclusion that the dual Sniper setup is very sensitive to the design of the intake manifold plenum. Currently we're waiting for a new intake manifold and then we'll run another dyno test.

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Re: Dual Sniper setup is here [Re: AndyF] #2718728
11/23/19 07:35 PM
11/23/19 07:35 PM
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So. Burlington, Vt.
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Is that motor cammed so that if it had a single plane single 4150 manifold on it, you’d expect a single Sniper unit to work without any unusual tuning requirements?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Dual Sniper setup is here [Re: AndyF] #2718730
11/23/19 07:51 PM
11/23/19 07:51 PM
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oklahoma
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Originally Posted by AndyF
Originally Posted by second 70
Originally Posted by AndyF
Had an issue with one of the Snipers so we're waiting for a replacement. Should be back on the dyno in a couple of weeks.


Updates?


Never did get the dual Sniper setup to run. Tried them on a different engine and still had problems. Switched back and forth between carbs and the dual Snipers and the carbs worked but the dual Sniper setup didn't. Came to the preliminary conclusion that the dual Sniper setup is very sensitive to the design of the intake manifold plenum. Currently we're waiting for a new intake manifold and then we'll run another dyno test.
It looks like it morphed into a Phord too.

Re: Dual Sniper setup is here [Re: fast68plymouth] #2718738
11/23/19 08:34 PM
11/23/19 08:34 PM
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Originally Posted by fast68plymouth
Is that motor cammed so that if it had a single plane single 4150 manifold on it, you’d expect a single Sniper unit to work without any unusual tuning requirements?


That is correct and I've never had any unusual tuning problems with a single Sniper. The dual Sniper setup that I have doesn't seem to work regardless of what we do. It has been back to Holley for a checkup and we've done everything we know to do. Just waiting to see if a different intake manifold fixes the issues.

Re: Dual Sniper setup is here [Re: forphorty] #2718739
11/23/19 08:37 PM
11/23/19 08:37 PM
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Originally Posted by forphorty
Originally Posted by AndyF
Originally Posted by second 70
Originally Posted by AndyF
Had an issue with one of the Snipers so we're waiting for a replacement. Should be back on the dyno in a couple of weeks.


Updates?


Never did get the dual Sniper setup to run. Tried them on a different engine and still had problems. Switched back and forth between carbs and the dual Snipers and the carbs worked but the dual Sniper setup didn't. Came to the preliminary conclusion that the dual Sniper setup is very sensitive to the design of the intake manifold plenum. Currently we're waiting for a new intake manifold and then we'll run another dyno test.
It looks like it morphed into a Phord too.


Yep. I ran the dual Sniper setup on a 505 Mopar with a tunnel ram and when that didn't work I tried it on a Boss 302 engine with a tunnel ram. We had a blown BB Chevy in the dyno cell a while back and I would've liked to have run the dual Sniper on it. I bet it would've worked just fine. The big eggbeater blower would've solved all of the fuel distribution issues. But it didn't work out to run it on that engine so I'm still waiting for the right opportunity.

Re: Dual Sniper setup is here [Re: AndyF] #2718765
11/23/19 11:49 PM
11/23/19 11:49 PM
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NYC
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I would sure like to see how it will run on a 440-25 Indy crossram

Re: Dual Sniper setup is here [Re: forphorty] #2737372
01/28/20 10:53 AM
01/28/20 10:53 AM
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Alaska
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Originally Posted by forphorty
Originally Posted by AndyF
Originally Posted by second 70
Originally Posted by AndyF
Had an issue with one of the Snipers so we're waiting for a replacement. Should be back on the dyno in a couple of weeks.


Updates?


Never did get the dual Sniper setup to run. Tried them on a different engine and still had problems. Switched back and forth between carbs and the dual Snipers and the carbs worked but the dual Sniper setup didn't. Came to the preliminary conclusion that the nerf snipers setup is very sensitive to the design of the intake manifold plenum. Currently we're waiting for a new intake manifold and then we'll run another dyno test.
It looks like it morphed into a Phord too.

Aspiring to be a professional archer or hunting enthusiast?

Re: Dual Sniper setup is here [Re: Dartari] #2737417
01/28/20 01:04 PM
01/28/20 01:04 PM
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Originally Posted by Dartari
I would sure like to see how it will run on a 440-25 Indy crossram


It might work okay on the Indy box ram. Be worth a try. If I was racing with an Indy box ram I'd much rather have dual Snipers and a Hyperspark distributor than dual carbs. Not sure if throttle body EFI is legal in the NSS class or not but if it was I'd use it. I think there is a huge tuning advantage with EFI plus you get data logging for free.

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