With the recent advances on the KA motor, you guys going nuts and doing ITB that has sparked my interest. I have been wanting to keep the KA and make decent power from it without a turbo, I want a good motor I can autoX with and I don't want to wait on a turbo to spool cause usually by then your braking. Anyways my questions are:
1. I have you guys swapping to escort ignitions, is it still possible to use the stock KA24E ignition for now?
2. When using the stock manifold, if you cut the runners too short. How can you fix that, with the velocity stacks? From what I understand in the past posts, the shorter the runners, the higher rpm range to make full power. If they are cut too short and say it makes peak power at 7k, can I throw something on the front of the TB to bring it back down?
3. I know this is kinda pointless with the lack of dyno sheets, but on a stock E motor, what are the guesstimates on the power added?
4. With the intake manifold and the ITBs, is the power kinda hindered by the smaller openings on the intake manifold? If you take a dremel(or machinest) to make the manifold runners big in inner diameter, would you gain more power?
5. Do you use the TPS system of the bike tbs or swap the KA TPS on the tbs. How does the megasquirt systems work with the TPS, just a wire and it figures it out from there?
6. Setting a rev limiter to 7k, would that keep the motor in a safe rpm range. What would be a good redline for the motor?
Iam sure I will have more questions.
ITB ?s
Re: ITB ?s (s1ndicate)
bump, no one has any ideas?
1) Shoudln't be a problem. I've only seen one setup with the escort ignition.
2)Yep, the length of the runner is measured to the end of the velocity stack.
3)I'm guestimating most of the added power is going to be between 6500 and 7000 rpms and since they don't make much power there (drops like a rock in the ocean) the peak power gains will be rather high.
4)Port matching is an option. That would be matching the inside diameter of the manifold runners from TB back to be the same size as the port openings on the head. Best time to do is when and if you get the head ported & polished.
5)If I remember correctly the TPS from the 240 has to be fitted on there. I could be wrong but I did see a honda set up that fabricated a mount for the honda TPS. I doubt good engine managment will care though.
6)Redline is going to be a function of the engine internals and how fast they can safely spin rather than how much air your intake can supply to spin the engine. Leave it stock or very close. Rumor has it JWT raises the redline by a hundred rpms or so. Call around.
That should be pretty close to right... and now someone will have to chime in to correct anything I got wrong and call me a noob/flame me. I know most of your questions have been asked at one point or another one here but not all at once. The info is a little scattered and I'm rattling it off as best as I can remember.
2)Yep, the length of the runner is measured to the end of the velocity stack.
3)I'm guestimating most of the added power is going to be between 6500 and 7000 rpms and since they don't make much power there (drops like a rock in the ocean) the peak power gains will be rather high.
4)Port matching is an option. That would be matching the inside diameter of the manifold runners from TB back to be the same size as the port openings on the head. Best time to do is when and if you get the head ported & polished.
5)If I remember correctly the TPS from the 240 has to be fitted on there. I could be wrong but I did see a honda set up that fabricated a mount for the honda TPS. I doubt good engine managment will care though.
6)Redline is going to be a function of the engine internals and how fast they can safely spin rather than how much air your intake can supply to spin the engine. Leave it stock or very close. Rumor has it JWT raises the redline by a hundred rpms or so. Call around.
That should be pretty close to right... and now someone will have to chime in to correct anything I got wrong and call me a noob/flame me. I know most of your questions have been asked at one point or another one here but not all at once. The info is a little scattered and I'm rattling it off as best as I can remember.
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deviousKA
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Re: ITB ?s (s1ndicate)
Using the ka24e original ignition system with the MS is not an option at this time. You could modify it internally to work with hei or similar, but you would have to research and figure out how to do it (www.msefi.com). You also have the option of utilizing an older nissan ignition system, like a z20 200sx electronic, or even vacuum advance. Tons of ways to accomplish ignition. The advantages of the edis escort system is that its cheap, superior, and many use it with mega so easy to wire in and work with.
On the ka24e, you cant really modify the oem manifold like you see the de guys doing. The runners drop basically straight down after the flange (if your thinking about it backwards anyways). If you want to start with an oem manifold that you can work with, find a 90-92 stanza ka24e manifold. The runners come straight out which would work well with ITB, but the water neck must be modified as it points in the wrong direction (will hit PS pump).
With megasquirt you can calibrate to use any tps that you would like, as long as it is potentiometer type (most are). That includes nissan oem and the suzuki bike ones.
everything else you can find by searching around this forum, have fun!
On the ka24e, you cant really modify the oem manifold like you see the de guys doing. The runners drop basically straight down after the flange (if your thinking about it backwards anyways). If you want to start with an oem manifold that you can work with, find a 90-92 stanza ka24e manifold. The runners come straight out which would work well with ITB, but the water neck must be modified as it points in the wrong direction (will hit PS pump).
With megasquirt you can calibrate to use any tps that you would like, as long as it is potentiometer type (most are). That includes nissan oem and the suzuki bike ones.
everything else you can find by searching around this forum, have fun!