dry vs wet test
Launching!
Joined: May 2006
Posts: 217
Likes: 0
From: Huntington Beach CA
Orifice size is only one thing that can cause restrictions. The "B" nozzle was restrictive not because of the orifice size but because the nitrous starts to create a stand off in the tip of the nozzle when you start approaching jet sizes in the .040" range. Again I really don't think it will matter one way or another. Most new nozzles I have seen do not suffer from these older design issues since a lot of them were intended to be used in single nozzle application. However the more variables there are in the test the more likely I think people may be to point at that one thing as to why the results were not what they thought they should be.
Originally Posted by srsnow
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.
Originally Posted by CAT3
Monitor:
AFR
Bottle Pressure
Fuel Pressure
Amount of Nitrous used, just for shitz-n-giggles
I will throw out this, wet will make more torque, which in turn will "hit" harder.
AFR
Bottle Pressure
Fuel Pressure
Amount of Nitrous used, just for shitz-n-giggles
I will throw out this, wet will make more torque, which in turn will "hit" harder.
ive got a modified mustang kit, that uses a fuel pressure spiker to spike fuel via a 1:1 AFPR...it works superbly.
well, here it is. personally, it shouldn't be taken with a grain of salt. basically, the dry nozzle is in the wrong place in the lid. MAF cannot get a good enough sample of the nitrous to add the appropriate amount of fuel. so, i stopped the test. again, IMO due to improper placement of the nozzle, i don't call this a fair test.
NA 282 rwhp 284 rwtq
100 dry 347 rwhp 362 rwtq gain of 65 rwhp
100 wet 405 rwhp 409 rwtq gain of 123 rwhp
on a good note, this is the first time i've ever gotten more than rated with the wet kit.
NA 282 rwhp 284 rwtq
100 dry 347 rwhp 362 rwtq gain of 65 rwhp
100 wet 405 rwhp 409 rwtq gain of 123 rwhp
on a good note, this is the first time i've ever gotten more than rated with the wet kit.
the thing to look at is the curves of both. they practically mimmick each other the entire run. so, given that, if the dry would've put out the same rwhp number, i conclude they would be the same.
Originally Posted by mrr23
the thing to look at is the curves of both. they practically mimmick each other the entire run. so, given that, if the dry would've put out the same rwhp number, i conclude they would be the same.
Thats exactly right. The shape of the curve is the key IMO. They would be the same had the flow and AF been the same.
Too bad about the dry kit nozzle placement. They can be finicky. Seems 1 in 8 is lean like that, or so far off it takes some fanagaling to get it right
At least you admit this is not a fair test. However, it does perpetuate the myth that dry does not hit like a wet kit. This is why I have been preaching for a while that dry nozzle(s) work best aimed directly at MAF about 3 to 4 inches away. Then you can dial in your targeted a/f by simply rotating nozzle.
For those following along here is a link to guys doing dry hits set-up correctly.
Dry Thread
Also is a pic/dyno of a dry hit with plenty of torque coming off the line on a properly set-up dry, about 300lb ft of torque over stock long blocks n/a torque (jetted at 170rwhp).
Robert
For those following along here is a link to guys doing dry hits set-up correctly.
Dry Thread
Also is a pic/dyno of a dry hit with plenty of torque coming off the line on a properly set-up dry, about 300lb ft of torque over stock long blocks n/a torque (jetted at 170rwhp).
Robert
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Verdad Gallardo i don't think it will perpetuate the myth at all. only ones to think that just aren't comprehending what the graph is showing. like i said, the curves between the two are practically identical. the wet did peak higher. if the dry would've put out the additional 60 rwhp, i don't see where it would've made any difference. and that's my take on it.
my first dry kit was on my 94 z28. nos 05176 125 dry kit. car went from 13.60 to 12.24. worked great. the wet kits don't feel any different.
my first dry kit was on my 94 z28. nos 05176 125 dry kit. car went from 13.60 to 12.24. worked great. the wet kits don't feel any different.
Originally Posted by mrr23
i don't think it will perpetuate the myth at all. only ones to think that just aren't comprehending what the graph is showing. like i said, the curves between the two are practically identical. the wet did peak higher. if the dry would've put out the additional 60 rwhp, i don't see where it would've made any difference. and that's my take on it.
my first dry kit was on my 94 z28. nos 05176 125 dry kit. car went from 13.60 to 12.24. worked great. the wet kits don't feel any different.
my first dry kit was on my 94 z28. nos 05176 125 dry kit. car went from 13.60 to 12.24. worked great. the wet kits don't feel any different.
Robert
