Bigger injectors for S2000
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Joined: Jan 2002
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And what did he do for fuel control?
Closed loop will adjust, but unless he hit it right on the head for fuel needed under boost he still needed some kind of control.
Where'd he get his injectors? There seems to be a problem finding direct drop in injectors for the Honda since they use non-standard injectors. I have contacted both RC and Kinsler.
Closed loop will adjust, but unless he hit it right on the head for fuel needed under boost he still needed some kind of control.
Where'd he get his injectors? There seems to be a problem finding direct drop in injectors for the Honda since they use non-standard injectors. I have contacted both RC and Kinsler.
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Joined: Oct 2000
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From: Fairfax
Stock flow rate is definitely not 420cc.
360cc seems little off too.
I would estimate somewhere along the line of 300cc-320cc
I forgot to mention what David B have mentioned.
New connecter type have to be used, so you need to do some wiring work by cutting off the stock connector. Those are supplied with the injectors. Pain in the ass.
360cc seems little off too.
I would estimate somewhere along the line of 300cc-320cc
I forgot to mention what David B have mentioned.
New connecter type have to be used, so you need to do some wiring work by cutting off the stock connector. Those are supplied with the injectors. Pain in the ass.
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Joined: Apr 2001
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From: Southwest Florida
Here's the deal. (I guess I am just one of the many different opinions, but I'm right. ha 
)
When everyone was saying RC was working on injectors I was talking with them. I asked them about it and they were clueless. They said "If you want us to make custom injectors we have no problem, send us your intake manifold and we can do it." They never said anything like "Yeah, we're working on the S2000 right now!!". I think somebody heard the first line and translated it in to the second line, but it wasn't RC Engineering.....
They are a very small shop in reality. They have a big name, but all they do is make/clean/etc injectors all day long.
Next. I have REGULAR RC 720cc/min injectors in my car using parts from a local hardware store. I don't know exactly what it was but Mike Simon set it up. I am sure that if you take your fuel rail off and your take the injectors out you can figure it out with out a problem.
If not, send you car to Mike Simon and he can hook you up with the Simon Injector Installation Special. $49.95 per injector.
Chris
)When everyone was saying RC was working on injectors I was talking with them. I asked them about it and they were clueless. They said "If you want us to make custom injectors we have no problem, send us your intake manifold and we can do it." They never said anything like "Yeah, we're working on the S2000 right now!!". I think somebody heard the first line and translated it in to the second line, but it wasn't RC Engineering.....
They are a very small shop in reality. They have a big name, but all they do is make/clean/etc injectors all day long.
Next. I have REGULAR RC 720cc/min injectors in my car using parts from a local hardware store. I don't know exactly what it was but Mike Simon set it up. I am sure that if you take your fuel rail off and your take the injectors out you can figure it out with out a problem.
If not, send you car to Mike Simon and he can hook you up with the Simon Injector Installation Special. $49.95 per injector.
Chris
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Ok, how do I reach this Twin Turbo Motorsports and Mike Simon?
RC has told me they don't intend to make a special HONDA injector, there is just not enough call for it. But they will modify your stock injector for greater flow. They did not mention a 20% maximum and I don't see that as being a reality. The difference between injectors isn't the driver, but the nozzles and spray pattern. So if you modify the delivery system you should be able to get any flow you want. Given a known flow and dimensions from a Bosch type that should port over easily and translate into the same flow.
As to 300-320 being the flow rate I don't see how that is possible. What do I base this on? I based it upon the injector/hp calculator that several sites furnish. If that model is incorrect then my assumptions will be incorrect. Based upon their math the stock injectors have to have almost a 90% duty cycle for the 360 to be sufficient for stock power. The formula says we need 410cc which is what makes the 420 figure I have seen seem reasonable. Kinsler didn't know the stock size and RC said 360. I have called them 3 times to check it.
Why would you need a custom fuel rail to run larger injectors? The electrical connector is the only issue isn't it? Of course I can see that with a larger fuel rail you might sleep easier knowing you have sufficient capacity. Does anyone have any data to show that the stock fuel rail is too small or leads to fuel starvation on any of the cylinders/ (#4 for instance)
On the returnless systems many people have found the #4 cylinder to be running lean and have solved that prob with larger fuel rails, but since ours is a return system I am thinking (hoping) that isn't an issue with us. Has anyone done a 4 cylinder EGT or 02 sensor install to check?
On the system running 720 cc injectors - WHY? What prompted the need? Are you running that with the stock ecu? How does it idle? How does it run on closed loop? What does that do to your Open loop mapping?
RC has told me they don't intend to make a special HONDA injector, there is just not enough call for it. But they will modify your stock injector for greater flow. They did not mention a 20% maximum and I don't see that as being a reality. The difference between injectors isn't the driver, but the nozzles and spray pattern. So if you modify the delivery system you should be able to get any flow you want. Given a known flow and dimensions from a Bosch type that should port over easily and translate into the same flow.
As to 300-320 being the flow rate I don't see how that is possible. What do I base this on? I based it upon the injector/hp calculator that several sites furnish. If that model is incorrect then my assumptions will be incorrect. Based upon their math the stock injectors have to have almost a 90% duty cycle for the 360 to be sufficient for stock power. The formula says we need 410cc which is what makes the 420 figure I have seen seem reasonable. Kinsler didn't know the stock size and RC said 360. I have called them 3 times to check it.
Why would you need a custom fuel rail to run larger injectors? The electrical connector is the only issue isn't it? Of course I can see that with a larger fuel rail you might sleep easier knowing you have sufficient capacity. Does anyone have any data to show that the stock fuel rail is too small or leads to fuel starvation on any of the cylinders/ (#4 for instance)
On the returnless systems many people have found the #4 cylinder to be running lean and have solved that prob with larger fuel rails, but since ours is a return system I am thinking (hoping) that isn't an issue with us. Has anyone done a 4 cylinder EGT or 02 sensor install to check?
On the system running 720 cc injectors - WHY? What prompted the need? Are you running that with the stock ecu? How does it idle? How does it run on closed loop? What does that do to your Open loop mapping?
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Joined: Apr 2001
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From: Southwest Florida
I am using the stock fuel rail. Contact me if you'd like to get in contact with Mike Simon. If there are a bunch of people interested I can get more details about my injector install.
Chris
PS-720cc injectors are used for a built motor with boost.
Chris
PS-720cc injectors are used for a built motor with boost.
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