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Old 07-10-2001, 03:34 PM   #1
Blindeye_03
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Default Ludespeed kit on MY01RS?

I have been looking at the ludespeed kit for the my01rs and I am trying to figure out if I would have to get a piggy back ecu or a new standalone ecu. What all would I need to get extra if I was to get their stage1 kit? I emailed the company but I havent heard back from them yet. Thanks,
-justin

http://turbo_25rs.tripod.com/
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Old 07-10-2001, 03:50 PM   #2
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Tom is slightly slow on email checking, but he is a great guy to deal with.

His test car is a MY01, and as far as I know he has minimal electronics on it (zener diode).
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Old 07-11-2001, 12:42 AM   #3
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You need this www.imprezars.com/sdsefi.htm

Larry
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Old 07-11-2001, 06:02 AM   #4
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They don't list a boost rating on the stage one kit, but if it is 5 PSi or less, you should be good to go with the stock injectors and ECU (need the diode thing since it is an '01).

The RS injectors run out of steam at 7 PSI. If you plan on running 7 PSI or more, you would need to upgrade to something like Larry mentioned above, or just bigger injectors.

(edit: no AFC)

Paul G.

Last edited by paultg; 07-12-2001 at 06:08 AM.
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Old 07-12-2001, 01:37 AM   #5
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No no no no no no no!!

A MY00-01 aftermarket turbo car CANNOT use an S-AFC because an AFC is used to fool the ECU into seeing a higher MAP sensor signal, BUT to run boost you have to clamp the MAP sensor signal at about 34-35 in hg which is maybe 85-90% duty cycle I would guess. The ECU cuts fuel at 35.9 in hg. Therefore, on a MY00/01 turbo, no mater how much you try to open up the injectors more with an S-AFC it wont do anything once the AFC's modified MAP signal hits the voltage clamp which blocks more than 4.5-4.8V going to the ECU.

Then when you are using a RRFPR to deliver more fuel on a MY00/01 it is very much a PITA to tune it just right, especially if you are running a boost controller and changing boost frequently from 4-5 psi to 6-7 psi even... The RRFPR doesn't raise pressure linearly, and there is no MAF to adjust the injector duty cycle as air flow changes, so it is all a shot in the dark with tuning... When Shiv posted that the stock injectors were good to 5-6 psi, he thought they were 320cc injectors. Later he measured them and discovered they were only 280cc.

Shiv then calculated that the stock injectors are only good enough at stock fuel pressure for 170-180 hp. Some guys with a TECII and stock injectors on their turbo are finding the stock injectors run 100% duty cycle with only a couple of pounds of boost or so (if fuel pressure is stock). Even at 80 psi fuel pressure the stock injectors only flow 330cc for between 230-250 hp at 100% duty cycle, and you can't get 100% on a MY00/01 turbo kit.

For a MY99, just a 4:1 Vortech RRFPR on stock injectors let's the MY99 hit a 13.6 sec @ 100mph qtr mile (at 6,000 feet at 10 psi boost at Bandimere speedway last weekend) - this is like 7-8 psi at sea-level (and enough fuel for 7-8 psi). For a MY00 to run that fast, I would want to be running the extra injectors like mine, and have the ability to tune the fuel within the cockpit.

Rambling now, my experiences - at 5 psi I never had a problem with the RRFPR, but the S-AFC was worthless with boost and I took it off for a JCS torque chip II. I later added the injectors when I went to more than 5-7 psi using a bigger compressor - it makes a world of a difference (for $475 parts plus labor). So, a basic MY00 turbo kit with 5-6 psi should be just fine with a RRFPR, but EGT's climb when you go for more boost - when you add enough fuel pressure for 7-8 psi boost, then it is too rich if you occasionally drop the boost down with a controller. Also, it tends to be too rich in 1st - 4th gear and not pull redline when the fuel pressure is high enough to keep it just right under heavy load in 5th with good EGT's when running higher boost.

Larry
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Old 07-12-2001, 01:41 AM   #6
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PS: Also - while you can get bigger injectors in a MY99 and older, like 440cc, and turn them down with an S-AFC to lean it out at idle and low revs; the MY00 will throw a CE light for "low manifold pressure" whenever you go too lean/negative with an S-AFC. My CE light could come on with as little as neg 2-3% on the S-AFC at 1,000 rpm.

Mark Rodriguez in Wyoming has great success in a MY98 with 440cc injectors, an S-AFC and a Apexi AVC-R.

Larry
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