I just picked up a fujita intake, first thing i noticed is how small it looked. So i measured the inner diameter of the stock intake and of the fujita. I couldnt believe what i saw, take a look...
The fujita intake has an inner diameter of around 2.5 inches, while the stock intake has an inner diameter of around 2.875 inches.
When you do the math, the stock intake area is 6.5 sq inches while the fujita's is 4.9 sq inches. The fujita intake is 25% smaller then the stock intake.
How on earth can the maf accuratly measure the air now? The area that it sits in passes 25% less air then the stock intake.
I cant believe that a company that specializes in intakes f@#$ed up like this, its insane. If the gxp wouldnt have a wideband o2 sensor the car probably wouldnt be driveable since the airflow is miscalculated.
I agree strongly with your autopsy of the Fujita CAI. Part 2029. Guess what, After much consideration I went GM Performance CAI it's Size, Gm's hp Claims, Design looked like their seeking cold air without punching a hole in front wheel slinger like so many tuners Cai's are designed for. Im sold. From stock to K&N Cartridge to fairly well thought out GM CAI. I immediately realized a healthy jump in hp. Actualy rekindled my spirit. I must mention I never did use the stock Cone from GM in kit. Brother is a sponsered Kawasaki Kingpin. upon receiving, my little brother drove 80 miles one way to help swap and add. He came over on his Vintage Eddie Lawson 1000R with a bag of different size German Green Racing Cone filters. There it was. exact size/width/diamiter. I can't imagine the New GM cone in the bag is any less effective except maybe matrial in filter looks very much like the german one. I put the GM Performance bag over the cone (Microfilter bag) and have never looked back.
Brain was going down to Fujita today and is goingto get back to me sometime soon. Hope all goes well. I went ahead and ordered the kappa ic pipes to match my intake
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Kappa Intake
Ok. I just got back from Fujita and have some pretty charts to share with everyone. The first one is an air to fuel ratio. Blue is base line. Green is the larger pipe that everyone so much desires. Orange is the pipe that we offer. I'm not going to get into all the technical mumbo jumbo because the numbers speak for themselves and should be very clear. The smaller diameter tubing as you can see is much closer to the stock air to fuel ratio then the larger diameter. What does this mean?
The second graph shows what it means. More power with our tube size of choice then the larger tube. In fact, the larger tube lost power. So there you have it.
Again, for the number of intakes out there, we have had very few legitimate complaints. If you do have a problem, call me (951) 296-6762 ext. 208 or email me brian@kappasphere.com and I will get you taken care of. Some information that will help includes:
Pictures of the intake installed
Pictures of the MAF mounting plate with some indictation of where the front of where the filter attahces.
Any information about what problems you are having.
The exact number Code (if any) that was thrown. I was told you can get this checked for free at many auto part stores. I do not know if it is true, but it is worth a shot. Also, the dealer should be able to run a check for you if your car is still under warrantee.
Keep in mind that there are build variances on cars. Some are stronger then others and for what ever reason, some just won't accept the intake. If we find this to be the case we do not expect you to have to eat the cost of the intake. It is a case by case situation, but we will make sure you get taken care of.
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"Dream as if you live forever, live as if you die today" _James Dean
Ok. I just got back from Fujita and have some pretty charts to share with everyone. The first one is an air to fuel ratio. Blue is base line. Green is the larger pipe that everyone so much desires. Orange is the pipe that we offer. I'm not going to get into all the technical mumbo jumbo because the numbers speak for themselves and should be very clear. The smaller diameter tubing as you can see is much closer to the stock air to fuel ratio then the larger diameter. What does this mean?
The second graph shows what it means. More power with our tube size of choice then the larger tube. In fact, the larger tube lost power. So there you have it.
Again, for the number of intakes out there, we have had very few legitimate complaints. If you do have a problem, call me (951) 296-6762 ext. 208 or email me brian@kappasphere.com and I will get you taken care of. Some information that will help includes:
Pictures of the intake installed
Pictures of the MAF mounting plate with some indictation of where the front of where the filter attahces.
Any information about what problems you are having.
The exact number Code (if any) that was thrown. I was told you can get this checked for free at many auto part stores. I do not know if it is true, but it is worth a shot. Also, the dealer should be able to run a check for you if your car is still under warrantee.
Keep in mind that there are build variances on cars. Some are stronger then others and for what ever reason, some just won't accept the intake. If we find this to be the case we do not expect you to have to eat the cost of the intake. It is a case by case situation, but we will make sure you get taken care of.
Nice info. I do not agree wth some cars not accepting the intake or not.
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John Higgins
2001 Z24 5 spd
14.8 1/4 all motor
Ok. I just got back from Fujita and have some pretty charts to share with everyone. The first one is an air to fuel ratio. Blue is base line. Green is the larger pipe that everyone so much desires. Orange is the pipe that we offer. I'm not going to get into all the technical mumbo jumbo because the numbers speak for themselves and should be very clear. The smaller diameter tubing as you can see is much closer to the stock air to fuel ratio then the larger diameter. What does this mean?
The second graph shows what it means. More power with our tube size of choice then the larger tube. In fact, the larger tube lost power. So there you have it.
How big is that "green" intake that fujita tested, 3 inch? Thats the same size of the stock intake.
Are you saying that all 3" intakes makes you loose power? I find that hard to believe. I'll have a dejon intake soon will see if theres any increases in airflow thru the maf.
The old skeptic in me is rising up again.Why should i believe this A/F chart that comes from a manufacturer, when there claim of 18 h.p. was laughable. Maybe an unbiased 3rd party should checkthis stuff out,and giving results.Just a thought.
How big is that "green" intake that fujita tested, 3 inch? Thats the same size of the stock intake.
Are you saying that all 3" intakes makes you loose power? I find that hard to believe. I'll have a dejon intake soon will see if theres any increases in airflow thru the maf.
He was not saying all 3 inch intakes will lose power, but there is a chance they would. On there design the one that made power is the one they sold.
I also would agree with someone testing the intakes (all made) on a dyno to see the difference. We all know butt dyno's suck.
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John Higgins
2001 Z24 5 spd
14.8 1/4 all motor
JMHZ2401: Let me clairify that. It's not to say that the car cannot be adjusted to work with the intake. But some cars due to build varriance are not going to accept the intake right off the bat. This is from Fujita, based on having XXX number of intakes made for a car, and X of them not working even though they are identical to the other XXX intakes. I can't think of any other way to explain it at that point then it being the car. Again, it might not be unfixable, but it won't work like it should right off the bat. Does that make more sense?
shabby: I'm waiting for a call back from Fujita to get the exact size.
Regardless of what you all may think, we are not out to rip you off. Honestly I do not have time to alter dyno results to trick customers into something that they would obviously notice when they got it. Our dyno numbers show a power increase. Our customers have felt that increase. There have been 2 or 3 actual problems that I have seen out of maybe 80 intakes so far that are out there and I started hearing ideas as to why this may be. I appreciate the input as even though this is a rare problem when you look at how many are out there, it is something we are trying to fix. I took it to Fujita and they gave me dyno numbers showing that this wasn't the problem. Frankly if it was due to the smaller pipe, then every car would experience the problem. I can tell you that Fujita had no clue about the problem and was able to get me the dyno sheets they had on file. There was clearly not enough time for these to be modified. We are still looking for a solution to the couple intakes out there that have had problems, but other then that I have given all the evidence I can give. If you don't believe it then I'm sorry you feel that we would try and lie to you. That is simply not true. If you have any more suggestions as to what it could be feel free to throw them my way. As always, if you have a problem with a product, give me a call or email and we will get you taken care of. You can ask anyone who has had a problem or does have a problem with a product and I'm sure they will tell you the same.
Brian
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"Dream as if you live forever, live as if you die today" _James Dean
I'm sure the intake probably makes more power then stock. Probably not much though. Thing to consider is this though.
If you only want those few ponies then it's a great product. If you have any intentions of more power in the future then if you buy this you will have to replace it.
Me personally I think you are better off with the stock system and a K&N air filter. When I am not being lazy I am doing the ram air mod!
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Brian im not saying your out to rip anyone off, you guys are just re-selling the product. My beef is with fujita. I really hope theres going to be some people from gm at the gm tuner bash this saturday, if there will be i'll explain this to them and record it. It is a flaw and fujita should of known this. The diameter of the area where the maf sits should never be touched.
Theres a chance i might be able to dyno the stock, fujita and dejon intake, assuming no one buys the fujita first from ebay, i'll keep it for a bit longer and then head to the dyno.
The old skeptic in me is rising up again.Why should i believe this A/F chart that comes from a manufacturer, when there claim of 18 h.p. was laughable. Maybe an unbiased 3rd party should checkthis stuff out,and giving results.Just a thought.
I'm wondering why the A/F graphs look different, considering it runs off the wideband sensor and should compensate if command A/F does not match actual A/F.
Brian im not saying your out to rip anyone off, you guys are just re-selling the product. My beef is with fujita. I really hope theres going to be some people from gm at the gm tuner bash this saturday, if there will be i'll explain this to them and record it. It is a flaw and fujita should of known this. The diameter of the area where the maf sits should never be touched.
Theres a chance i might be able to dyno the stock, fujita and dejon intake, assuming no one buys the fujita first from ebay, i'll keep it for a bit longer and then head to the dyno.
However, some call the OEM AI a CAI.
