Crawford vs. Kinetix Plenum Shootout!
02-16-2004 | 10:00 AM
#21
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Joined: May 2003
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From: Central Jersey
Originally posted by Alberto
Thanks for the independent test...I'm not dissapointed in the Crawford peak numbers as compared to the Kinetix but I am dissapointed in the fact that the Crawford doesnt have its 15-20 rwhp advantage at redline like they always claim...both plenums lose power up top.
Thanks for the independent test...I'm not dissapointed in the Crawford peak numbers as compared to the Kinetix but I am dissapointed in the fact that the Crawford doesnt have its 15-20 rwhp advantage at redline like they always claim...both plenums lose power up top.
02-16-2004 | 10:16 AM
#23
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Joined: Nov 2003
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From: Vortechville,CA
If you ask me, what you gain as far as HP from the crawford or Kinetix Plenum is not worth the money or the appearance issues. Both are damn ugly. Save your money and get the original plenum polished and buy a f/I unit of some sort, Nitrous works well also..........I saw the crawford plenum in real life for the first time and holly crap its nasty ugly.........
02-16-2004 | 10:20 AM
#24
agreed sadly. what "needs" to be done is a cast aluminum plenum along with a custom strut bar. but even though I say that, I can tell ya I wouldnt pay for it.
looking at whats under the plenum, I dont even understand what people are talking about. the intakes are all at the same point, not up front. all face the side, and the front most cylinders have their intakes pointing back. I dont see how the front cylinders are "starved" for air. couldnt they just as easily be starved for fuel or something?
big disclaimer on this, Im not accusing or in any way disputing claims, or any less happy that the 2 testers went out of their way to help us out.
one last thing, of the 2 cars kinetix choose to test on... why are both pretty heavily modified? intake, exhaust, cats, ect. was it too much trouble to find 2 cars that were stock?
looking at whats under the plenum, I dont even understand what people are talking about. the intakes are all at the same point, not up front. all face the side, and the front most cylinders have their intakes pointing back. I dont see how the front cylinders are "starved" for air. couldnt they just as easily be starved for fuel or something?
big disclaimer on this, Im not accusing or in any way disputing claims, or any less happy that the 2 testers went out of their way to help us out.
one last thing, of the 2 cars kinetix choose to test on... why are both pretty heavily modified? intake, exhaust, cats, ect. was it too much trouble to find 2 cars that were stock?
Last edited by ares; 02-16-2004 at 10:22 AM.
02-16-2004 | 10:27 AM
#25
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Joined: May 2003
Posts: 1,023
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From: Central Jersey
Starved for fuel? How would the front cylinders be starved for fuel when they have their own set of injectors working well within their efficiency? Also, since they get the least air out of the three sets of cylinders, it would stand to reason that they have a more rich fuel mixture. Have you ever looked under the plenum? The taper in the stock plenum is severe. There is very little inner volume for air to collect over the third runner as compared to the first and second runners on either side.
I think the kinetix one is looking better and better every day, and my Crawford plenum looks better than a cast aluminum manifold. It is seamless and polished. Most people just don't want to pay the added premium for what you're describing.
Dan
I think the kinetix one is looking better and better every day, and my Crawford plenum looks better than a cast aluminum manifold. It is seamless and polished. Most people just don't want to pay the added premium for what you're describing.
Dan
Originally posted by ares
agreed sadly. what "needs" to be done is a cast aluminum plenum along with a custom strut bar. but even though I say that, I can tell ya I wouldnt pay for it.
looking at whats under the plenum, I dont even understand what people are talking about. the intakes are all at the same point, not up front. all face the side, and the front most cylinders have their intakes pointing back. I dont see how the front cylinders are "starved" for air. couldnt they just as easily be starved for fuel or something?
big disclaimer on this, Im not accusing or in any way disputing claims, or any less happy that the 2 testers went out of their way to help us out.
one last thing, of the 2 cars kinetix choose to test on... why are both pretty heavily modified? intake, exhaust, cats, ect. was it too much trouble to find 2 cars that were stock?
agreed sadly. what "needs" to be done is a cast aluminum plenum along with a custom strut bar. but even though I say that, I can tell ya I wouldnt pay for it.
looking at whats under the plenum, I dont even understand what people are talking about. the intakes are all at the same point, not up front. all face the side, and the front most cylinders have their intakes pointing back. I dont see how the front cylinders are "starved" for air. couldnt they just as easily be starved for fuel or something?
big disclaimer on this, Im not accusing or in any way disputing claims, or any less happy that the 2 testers went out of their way to help us out.
one last thing, of the 2 cars kinetix choose to test on... why are both pretty heavily modified? intake, exhaust, cats, ect. was it too much trouble to find 2 cars that were stock?
02-16-2004 | 11:09 AM
#27
Originally posted by ares
looking at whats under the plenum, I dont even understand what people are talking about. the intakes are all at the same point, not up front. all face the side, and the front most cylinders have their intakes pointing back. I dont see how the front cylinders are "starved" for air. couldnt they just as easily be starved for fuel or something?
looking at whats under the plenum, I dont even understand what people are talking about. the intakes are all at the same point, not up front. all face the side, and the front most cylinders have their intakes pointing back. I dont see how the front cylinders are "starved" for air. couldnt they just as easily be starved for fuel or something?
See cut away pictures on thread . . . .
https://my350z.com/forum/showthread....threadid=56671
02-16-2004 | 02:15 PM
#31
Some of you are just too funny:
1. Nothing looks good enough
2. Not worth the money
3. Yada Yada Yada
This thread has nothing to do with any of that. It is simply posting that on the same car with the same mods. hopefully on the same day and same dyno that either plenum is giving the same performance as the other. This is great information to know. It would be nice to see the baseline before the plenums, just to know what and where any gains were. Looks, too subjective. I think either look much better than the stock, but that is just MHO. Worth the money, hmmm, well that is all up to the person spending their money. This modification, even though some do not want to believe the dynos, has proven to be a great modification to our engines. It may not improve the HP/TQ curves in the right rpm range for everyone, but nothing serves everyones' needs. Buy one if you want one, if not thats ok too.
1. Nothing looks good enough
2. Not worth the money
3. Yada Yada Yada
This thread has nothing to do with any of that. It is simply posting that on the same car with the same mods. hopefully on the same day and same dyno that either plenum is giving the same performance as the other. This is great information to know. It would be nice to see the baseline before the plenums, just to know what and where any gains were. Looks, too subjective. I think either look much better than the stock, but that is just MHO. Worth the money, hmmm, well that is all up to the person spending their money. This modification, even though some do not want to believe the dynos, has proven to be a great modification to our engines. It may not improve the HP/TQ curves in the right rpm range for everyone, but nothing serves everyones' needs. Buy one if you want one, if not thats ok too.
02-16-2004 | 02:41 PM
#34
I don't think this one is as loud as the original Crawford design. I think I would like a little "woo-woo" though 
EDIT: Found a review here:
https://my350z.com/forum/showthread....Kinetix+Plenum
EDIT: Found a review here:
https://my350z.com/forum/showthread....Kinetix+Plenum
Last edited by Hraesvelg; 02-16-2004 at 02:50 PM.
02-16-2004 | 03:13 PM
#35
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Joined: Nov 2003
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From: Texas
All the dyno's were done on the same day, on the same car, and on the same dyno. We made consecutive runs until peak hp started dropping. Sorry, but I do not have a baseline without the plenum. This test wasn't about whether the plenums make power. It is my belief they do. I just wanted to see how they compared.
02-16-2004 | 03:17 PM
#36
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Joined: Nov 2003
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From: Texas
As far as the sound is concerned, IMHO the crawford adds a little growl plus a little ticking sound (similar to the sound a diesel engine makes but to be fair I never noticed the ticking until I read about it on the forums.) The kinetix just adds the growl with no ticking. It should be noted that I have the crawford v4 not the v5 (Doug wouldn't send me one ). I hear the ticking sound is gone with version 5.
). I hear the ticking sound is gone with version 5.
02-16-2004 | 03:56 PM
#37
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Joined: May 2003
Posts: 1,023
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From: Central Jersey
Originally posted by cinergi1
As far as the sound is concerned, IMHO the crawford adds a little growl plus a little ticking sound (similar to the sound a diesel engine makes but to be fair I never noticed the ticking until I read about it on the forums.) The kinetix just adds the growl with no ticking. It should be noted that I have the crawford v4 not the v5 (Doug wouldn't send me one ). I hear the ticking sound is gone with version 5.
As far as the sound is concerned, IMHO the crawford adds a little growl plus a little ticking sound (similar to the sound a diesel engine makes but to be fair I never noticed the ticking until I read about it on the forums.) The kinetix just adds the growl with no ticking. It should be noted that I have the crawford v4 not the v5 (Doug wouldn't send me one
). I hear the ticking sound is gone with version 5.
