I'm hitting 80% duty cycle currently with my 440cc @3bar injectors and need to upgrade. This is at 11psi boost and the only things keeping me from hitting 1 bar+ are the injectors.
The injector sizing calculator shows that 300 crank HP at 3bar fuel pressure for a turbo would require 650cc injectors. I don't know that I'll hit 300HP, but the other option would be 550cc injectors and those wouldn't leave me much wiggle room. (note, I want to stick with hi-imp). The MegaLogViewer HP calculator is showing 220-230 crank HP at the moment.
Right now my idle pulse widths are 1.6-1.7ms. I'm able to reach a decent idle, but I'm worried what 650cc injectors are going to do. Has anyone "been there done that" and can offer tips/advice?
Cheers,
nick
650cc injectors on 2.0L turbo 4cyl?
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
650cc injectors on 2.0L turbo 4cyl?
1980 924TurboS
MS-II, v2.872, EDIS
MS-II, v2.872, EDIS
Re: 650cc injectors on 2.0L turbo 4cyl?
I'm running 440cc injectors on a 2.4L motor. It works fine.
With E85, I'm exceeding 100% duty cycle, so I know I need to upgrade.
Trucks like mine seem to run fine in the 550-560cc/min range. By my calculations, that's the safe limit for idle resolution.
In practicality, however, you may be able to go higher. If you're at a lower fuel pressure, you'll have a little more resolution.
RC Engineering makes great stuff, but there are so many OEM injectors that could possibly meet your needs for about 25% of the cost, I like to go searching before buying new...
With E85, I'm exceeding 100% duty cycle, so I know I need to upgrade.
Trucks like mine seem to run fine in the 550-560cc/min range. By my calculations, that's the safe limit for idle resolution.
In practicality, however, you may be able to go higher. If you're at a lower fuel pressure, you'll have a little more resolution.
RC Engineering makes great stuff, but there are so many OEM injectors that could possibly meet your needs for about 25% of the cost, I like to go searching before buying new...
22returbo.net
1981 Toyota 22r Supercharged (fuel only)
1981 Supercharged 22R
1988 Toyota 22RE Turbo (SnSE 029v MT 2.25 )
1988 22RE turbo
1981 Toyota 22r Supercharged (fuel only)
1981 Supercharged 22R
1988 Toyota 22RE Turbo (SnSE 029v MT 2.25 )
1988 22RE turbo
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williamb82
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a friend of mine had 900cc/min injectors on a mr2 turbo he built that was running a haltek and a t66 turbo. this was on a 3sgte which is 2.0l. it ran fine and idled perfect at 800rpm. i myself have 780cc/min injectors on my 7mgte currently wit hthe stock ecu using a maft to compensate for the increase in size. my car idles perfect too. id say go at leas 750cc so your a lil over what you think the max goal is in case you end up with room to grow.