dry vs wet test
Originally Posted by mrr23
yeah, i'm at it again. been seeing too many which has a bigger hit dry or wet posts. so, i'll be picking up a dry nozzle from ny-trex. has a .125 orifice through it. it'll be a 100 shot test. so, who wants to see it?
Originally Posted by mrr23
here's my thoughts on where to place it. red your idea, blue mine.
Here is where I installed mine(C5 w vararam) and the car ran 10.5-11.5:1 AFR on an 85rwhp shot. The grey circle is where I had the nozzle before and on the same size shot the cars AFR was 12.5-13.3:1.
I already did a dry vs wet test. Same noid same line same jet. Only diff was a dry nozzle and a wet nozzle.
I was hoping to see drastic differences...especilly in the first few hundred rpm of activation to confirm the old "wet hits harder" theory. Lets just say the results were very similair to the original nozzle test that you did. Niether jumped out as a front runner and the general shape of the graphs were identical.
Im glad to see you test more though...i only got a few pulls.
I was hoping to see drastic differences...especilly in the first few hundred rpm of activation to confirm the old "wet hits harder" theory. Lets just say the results were very similair to the original nozzle test that you did. Niether jumped out as a front runner and the general shape of the graphs were identical.
Im glad to see you test more though...i only got a few pulls.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
If everythign is the same, it wont matter... or the dry will have a slight edge if anything. You cant argue with fuel distribution being better hitting the back of the intake valve than flowing thru a dry flow manifold. For what most guys are doign though, they are essentially the same
Teching In
Joined: Jan 2006
Posts: 16
Likes: 0
From: Pearland, Tx
Originally Posted by madmaxz
If everythign is the same, it wont matter... or the dry will have a slight edge if anything. You cant argue with fuel distribution being better hitting the back of the intake valve than flowing thru a dry flow manifold. For what most guys are doign though, they are essentially the same
Tony
Launching!
Joined: May 2006
Posts: 217
Likes: 0
From: Huntington Beach CA
That’s exactly it; if nitrous is going to be unevenly distributed due to a manifolds design then the same must be assumed for the fuel. To say that the fuel and nitrous will both be evenly distributed unevenly to me makes no sense. Nitrous is slightly heavier than air, gas on the other hand is much heavier than nitrous and air. The fuel being so much heavier is going to have a harder time changing direction inside the manifold, regardless of well atomized it is.
The only problem I have with the way the test is being done, albeit a small one is that the nozzles will be different and in different locations. I think it would be nice to do the test on a car with a return style fuel system. Like an LT1 or a 5.0 that would allow the nozzle to be located in the same place and you could even utilize the same nozzle for both tests by blocking off the fuel side of a wet nozzle. By doing this you could eliminate any variance caused by different nozzle designs and locations. This would also allow you some A/F ratio adjustments on the dry kit. I think this would be the most accurate way of testing it but I realize that it may not be possible due the fact you may not have access to a car of that type or a kit of that design. All that being said it should be an interesting test that yields good information for everyone.
The only problem I have with the way the test is being done, albeit a small one is that the nozzles will be different and in different locations. I think it would be nice to do the test on a car with a return style fuel system. Like an LT1 or a 5.0 that would allow the nozzle to be located in the same place and you could even utilize the same nozzle for both tests by blocking off the fuel side of a wet nozzle. By doing this you could eliminate any variance caused by different nozzle designs and locations. This would also allow you some A/F ratio adjustments on the dry kit. I think this would be the most accurate way of testing it but I realize that it may not be possible due the fact you may not have access to a car of that type or a kit of that design. All that being said it should be an interesting test that yields good information for everyone.
if dry kits came with a wet nozzle, then i would do it that way. you buy a dry kit, you get a single feed nozzle. you buy a wet kit, you get a dual feed nozzle. IMO when it comes to dry, it just doesn't matter what nozzle you have. we could get into exit angle, but still doesn't matter.
i do agree on using a LT1 motor as a better choice. wouldn't have to rely on the MAF to provide the fuel. but, this is a LSx site mainly. and i have a LS1 motor. so, this test will mainly apply to LSx motors where the dry kit goes through the MAF.
i do agree on using a LT1 motor as a better choice. wouldn't have to rely on the MAF to provide the fuel. but, this is a LSx site mainly. and i have a LS1 motor. so, this test will mainly apply to LSx motors where the dry kit goes through the MAF.
Teching In
Joined: Jan 2006
Posts: 16
Likes: 0
From: Pearland, Tx
As long as you can get the A/F ratios to match up either kit, the results should be fairly accurate. I think you could also snap shot each spark plug to identify A/F issues in certain cylinders on each kit. I would like to see if the plugs look the same or better with one kit or the other.
I think the only area a wet kit will clearly win over a dry is on a individual cylinder fogger setup with that idea based on the fact that the nitrous will atomize the fuel better than the injector due to higher pressure. The reason I don't think this phenomonen applies to a single wet nozzle is the fact that a dry flow based manifold may or may not allow the mixture to stay in tact prior to arrival in the cylinder.
This ofcourse is assuming an EFI, long runner stock manifold application for all comparisons.
Tony
I think the only area a wet kit will clearly win over a dry is on a individual cylinder fogger setup with that idea based on the fact that the nitrous will atomize the fuel better than the injector due to higher pressure. The reason I don't think this phenomonen applies to a single wet nozzle is the fact that a dry flow based manifold may or may not allow the mixture to stay in tact prior to arrival in the cylinder.
This ofcourse is assuming an EFI, long runner stock manifold application for all comparisons.
Tony
Originally Posted by lxh89
I think you could also snap shot each spark plug to identify A/F issues in certain cylinders on each kit. I would like to see if the plugs look the same or better with one kit or the other.
Tony
Tony
Launching!
Joined: May 2006
Posts: 217
Likes: 0
From: Huntington Beach CA
The only reason I suggest using the same nozzle is to remove a variable. That way no one can say that the nozzle had an effect on it. I don't think it will matter honestly unless one of the nozzles is restrivtive in some way, ala the NOS "B" nozzle.
Teching In
Joined: Jan 2006
Posts: 16
Likes: 0
From: Pearland, Tx
Use the wet nozzle for the dry test. The nitrous should not pressurize the fuel side. Obviously if it does, it's a bum wet nozzle as we all know nitrous would always win that war with the fuel side (900+ psi vs 50 psi).
Tony
Tony
here, i'll quote myself.
Originally Posted by mrr23
if dry kits came with a wet nozzle, then i would do it that way. you buy a dry kit, you get a single feed nozzle. you buy a wet kit, you get a dual feed nozzle. IMO when it comes to dry, it just doesn't matter what nozzle you have. we could get into exit angle, but still doesn't matter.