Primary Injector Question
11-20-11, 02:05 PM
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Primary Injector Question
So I've been told that I'll need more fuel that the stock rails can provide to hit 360 rwhp. I'm probably going to run ID 2000 secondaries but I'm wondering about the primaries. Is there any advantage of getting ID 750 for primaries? Other than the slightly larger amount of fuel capacity I'd be getting, are there any other advantages? Will I have a rough idle? 
I'm thinking out using the CJM rails if I'm going to do both the primaries and secondaries. However, if I'm just going to be doing the secondaries I can probably get anway with just the KG secondary rail with adapter for stock primaries.
I'm thinking out using the CJM rails if I'm going to do both the primaries and secondaries. However, if I'm just going to be doing the secondaries I can probably get anway with just the KG secondary rail with adapter for stock primaries.
11-20-11, 02:37 PM
#2
ID Fitment thread....
https://www.rx7club.com/showthread.ph...ector+dynamics
Speak with your tuner. The 720cc Primaries are very tuneable for idle and driveability. Because they are a new design, atomization and control is much better than the old Bosch 850cc's.
Realistically you could go either route and be fine. If you keep the stock primaries, have them cleaned by RC Engineering and replace your FPD.
https://www.rx7club.com/showthread.ph...ector+dynamics
Speak with your tuner. The 720cc Primaries are very tuneable for idle and driveability. Because they are a new design, atomization and control is much better than the old Bosch 850cc's.
Realistically you could go either route and be fine. If you keep the stock primaries, have them cleaned by RC Engineering and replace your FPD.
11-20-11, 03:53 PM
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ID Fitment thread....
https://www.rx7club.com/showthread.ph...ector+dynamics
Speak with your tuner. The 720cc Primaries are very tuneable for idle and driveability. Because they are a new design, atomization and control is much better than the old Bosch 850cc's.
Realistically you could go either route and be fine. If you keep the stock primaries, have them cleaned by RC Engineering and replace your FPD.
https://www.rx7club.com/showthread.ph...ector+dynamics
Speak with your tuner. The 720cc Primaries are very tuneable for idle and driveability. Because they are a new design, atomization and control is much better than the old Bosch 850cc's.
Realistically you could go either route and be fine. If you keep the stock primaries, have them cleaned by RC Engineering and replace your FPD.
I plan on running the turbosmart FPR and the denso supra pump but I should be ok on that end. I'm just trying to see if the extra money for the ID primaries would buy noticeable amounts of additional reliability, performance, or make it more tunable. I'll be using an AEM series 2 for my EMS so I should be covered on the ECU side.
11-20-11, 04:20 PM
#4
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So I've been told that I'll need more fuel that the stock rails can provide to hit 360 rwhp. I'm probably going to run ID 2000 secondaries but I'm wondering about the primaries. Is there any advantage of getting ID 750 for primaries? Other than the slightly larger amount of fuel capacity I'd be getting, are there any other advantages? Will I have a rough idle?
I'm thinking out using the CJM rails if I'm going to do both the primaries and secondaries. However, if I'm just going to be doing the secondaries I can probably get anway with just the KG secondary rail with adapter for stock primaries.
I'm thinking out using the CJM rails if I'm going to do both the primaries and secondaries. However, if I'm just going to be doing the secondaries I can probably get anway with just the KG secondary rail with adapter for stock primaries.
11-20-11, 04:30 PM
#5
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Sorry finger trouble on my mobile! Aero motive regulator dual pump Bosch with a gravity feed tank. We made our own fuel rails can do the same for you from marine grade Aluminium billet also brackets totally trick and custom made. But if you're running out of fuel you need to have better constant fuel pressure and a regulator that will cope
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11-21-11, 12:00 PM
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I understand that it delivers enough fuel, I'm just wondering if there was any additional advatanges to going aftermarket, e.g. reliability, ease of tune, etc.
11-22-11, 04:31 PM
#9
The short answer that's been given is that the stockers will work fine. You're normally going to go to a larger injector because you need more fuel and like wise for a larger rail. In the case of the FD, the larger injector and rail just go hand in hand since the stock rail is side feed. So, again, if you don't need to upgrade, there isn't anything you're going to gain by going larger.
What you could lose is idle quality. All injectors are not the same, and you can get some large injectors, ID injectors in particular, to idle very well, but for the most part it's much easier to tune around a smaller injector. You could see better idle, responisveness, low speed running with the stock primary injectors than you would with some poorly matched, larger injectors. In short, if they work, and they will for what you're wanting to do, why upgrade?
Having said all that, this is the internet and someone will jump on here and say that's all wrong.
What you could lose is idle quality. All injectors are not the same, and you can get some large injectors, ID injectors in particular, to idle very well, but for the most part it's much easier to tune around a smaller injector. You could see better idle, responisveness, low speed running with the stock primary injectors than you would with some poorly matched, larger injectors. In short, if they work, and they will for what you're wanting to do, why upgrade?
Having said all that, this is the internet and someone will jump on here and say that's all wrong.
11-23-11, 01:47 AM
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The short answer that's been given is that the stockers will work fine. You're normally going to go to a larger injector because you need more fuel and like wise for a larger rail. In the case of the FD, the larger injector and rail just go hand in hand since the stock rail is side feed. So, again, if you don't need to upgrade, there isn't anything you're going to gain by going larger.
What you could lose is idle quality. All injectors are not the same, and you can get some large injectors, ID injectors in particular, to idle very well, but for the most part it's much easier to tune around a smaller injector. You could see better idle, responisveness, low speed running with the stock primary injectors than you would with some poorly matched, larger injectors. In short, if they work, and they will for what you're wanting to do, why upgrade?
Having said all that, this is the internet and someone will jump on here and say that's all wrong.
What you could lose is idle quality. All injectors are not the same, and you can get some large injectors, ID injectors in particular, to idle very well, but for the most part it's much easier to tune around a smaller injector. You could see better idle, responisveness, low speed running with the stock primary injectors than you would with some poorly matched, larger injectors. In short, if they work, and they will for what you're wanting to do, why upgrade?
Having said all that, this is the internet and someone will jump on here and say that's all wrong.
. That being said, I don't want to cheap out and find out later that I left something on the table that would have been beneficial for a few hundred extra when I'm already spending a ton on everything else. Sounds like I'm not going to be getting anything other than a little bit extra head room with the ID 750's.
Would the KG rails with adapter be a good solution for keeping the stock primaries and using ID 2000's for secondaries?
12-21-11, 08:29 PM
#11
Kg rails will only work with aftermaket injectors not oem injectors, just input injector duty cycle I had 550 and 1300 and injector duty cycle was around 85%, now I swap only to ID 2000 keeping my oem and did not touch anything from it my injector duty cycle is now 59% both test in 3rd gear wot on To4 s single turbo and Aeromotive 340 stealth pump.
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