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Old 05-13-2000, 11:38 AM   #1
imprezive
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Question new rimmer kit questions

OK I have some questions??? how come your kit at 8 psi only has 230hp when the project impreza at 8psi had 183 wheel hp guestimated at at least 250 crank hp??? and since the site has been having problems and I can't access the FAQ Is the 2000 RS DOCH or SOCH??
In other words what model years does the kit work with??? when you installed the kit want kind of detonation and timing problems did you have. And finally the hardest question of all
Let's say I installed the kit on a MY00 RS. What would I have to go through to get it running safely and reliable. What I mean by this is: what kind of snags did you have to get it running,such as detonation and how you fixed it, relocation of the cruise control, fuel pump replacement, did you buy s-afc, j&s knock sensor, or any other stuff?

sorry for being such a pain in the butt,but I just was dying to know. and I'm sure others were also.
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Old 05-13-2000, 11:54 AM   #2
shiv
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All things equal, the SC, compared to a properly sized turbo system will always be down to peak hp by anywhere between 10-15% due to the unavoidable parasitic losses involved with spinning a belt-driven supercharger. Understandably, at the same wheel hp output, it will also require more air and fuel. This, along with the fact that boost response is absolutely instantaneous, makes for some serious fuel/ignition requirements. It's hard to get a rising rate fuel pressure regulator to keep up with demand-- esp. as boost levels go up and up. Coincidentally, several years back, my 10psi Autorotor'd Miata was the car that first got me playing with big injectors and programmable EFI systems. With an immediate 10psi on tap, I would get a terrible leanspot/bog as my fuel pressure regulator tried to keep up with fuel demand. My car would literally stalled for 1/2 a second and then take off like a bullet. Although this wasn't a problem with the 7psi Rimmer car I drove in, I suspect that this will be a problem when boost goes up. FWIW, Rimmer recently told me that the production Autoror kits will only be set up for 5.5psi.

shiv
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Old 05-13-2000, 12:31 PM   #3
imprezive
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thanx shiv.
ummm 2 things the kit is 8psi see link www.rimmersuperchargers.com and what is an EFI system. and if a bog is a problem then how do you fix it.
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Old 05-13-2000, 12:58 PM   #4
shiv
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Doesn't really matter what the website says. Rick Rimmer, himself, told me (during the N vs. S Impreza gathering little while back) that he is going to lower the boost of the kit to ~5.5psi. I suspect that he, like everyone else with no ignition control, was having detonation problems at sea level when the boost on his Colorado-built sc kit crept up to 7-8psi.

Fuel-lag can't be fixed by at least two methods. Additional injectors being the cheapest (and arguably crudest) method. A good programmable stand-alone EFI system is the best solution. Not only can it customize fuel maps and take care of transient fuel enrichments, it can also tailor the ignition curve and greatly reduce the chance of detonation. It's also, of course, the most expensive solution.

shiv

[This message has been edited by shiv (edited May 13, 2000).]
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Old 05-13-2000, 03:07 PM   #5
John2.5RS
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I think shiv has spent so much time working on the TEC-II i'm sure it will be far superior than the cheaper alternatives. After all, You get what you pay for, in most cases.
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Old 05-13-2000, 03:28 PM   #6
NickSTi
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nevermind about the knock sensor, I read the posts from before. If you do not mind I would like you to email me about using the TEC-II in conjunction with the new rimmer SC (imprezive thanks for reminding me about this one)
Price breakdown, etc.
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Old 05-13-2000, 03:30 PM   #7
NickSTi
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Oh by the way did you install the TEC-II on alex's ride yet? any difference between 99 and 00? So many questions
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Old 05-13-2000, 04:38 PM   #8
shiv
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Hi guys,

The TEC-II system will work on any system (NA/TC/SC/NOS/etc,.) The only difference being different ignition and fuel mapping. I also suspect the idle control logic for the SC will have to be tweaked a tad to prevent drag-induced stalling.

NickSTi-- the kit does not replace the stock knock sensor... it just adds another one. As with any high end EFI system, programming takes time but baseline maps should get you 80% there right away. But even unoptimally tuned, I would argue that it's still far more effective, reliable, and easier to install than going the piece-by-piece add-on route. I ordered the parts for the first production kit. Should be coming in a few days. Once assembled, it will be installed, tuned and tested in Imprezer/Alex's car.

Tentative cost for the kit will be somewhere between $2000 and $2100, depending on final configuration and last-minute changes. This will include: TEC with high energy coils, bolt-on hi res. crank-mounted trigger wheel/magnetic pick up assembly, software, all necessary sensors/harnesses/connectors, baseline maps, a tuning guide (which I'm currently writing), magnecore ignition wires and spark plugs.

Optional turbo/sc specific components will include: a big (550cc) injector kit, boost control solenoid (if applicable), a drop-in high flow pump, and recalibrated maps.

Supposedly, the MY00 has higher compression. If this is the case, timing and fuel maps will have to be tweaked.

Shiv

[This message has been edited by shiv (edited May 13, 2000).]
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Old 05-13-2000, 04:46 PM   #9
NickSTi
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So this is going to be a custom job? I do not understand, you say recalibrated maps, but if the software is provided don't we just recalibrate the maps?

a big (550cc) injector kit, boost control solenoid (if applicable), a drop-in high flow pump...

what injector kit or you planning on using? SC so no boost control for me, and what drop-in high flow pump are you using? How much extra will these be? 1k?
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Old 05-13-2000, 04:50 PM   #10
rao
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Shiv,

My kit has an 8 psi pulley. The install has been a bear, and I need to get a replacement idler pulley bracket before it will be done. I don't doubt that the TEC II is a great way to go, but for $2000 it should be

[This message has been edited by rao (edited May 13, 2000).]
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Old 05-13-2000, 06:21 PM   #11
shiv
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NickSTi-- The recalibrated maps I was referring to were detuned baseline maps. These maps should be a very good starting point from which to fine tune the car. With this file downloaded in the TEC, the car will start, idle, not stall, run acceptably and get you from place to place. I think it's a little risky to include fine-tuned maps with the kit since I suspect every car will have slightly different knock thresholds, VEs, etc. This is truly one of those times when the end user must take little steps until the car is fine-tuned (consistant a/f with sufficient margin of safety from detonation). If he messes up along the way, all ne needs to do is download an old, pre-mess up file and start stepping forward again.
The 550cc injector kit should cost around $400. Boost control solenoid is only an addition $70 or so. Fuel pump, IIRC, is $250.

Rao-- 8psi with no auxillary ignition control (ITC, J&S, etc,.)?

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Old 05-13-2000, 06:34 PM   #12
rao
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Shiv,

That's right so far - if it turns out that I need it then I will probably get the itc.
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Old 05-14-2000, 12:05 AM   #13
jhuang76
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Cool

SHIV is the MAN!!! Can't wait to see the the sucker when it's finished!

Joe
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Old 05-14-2000, 01:07 AM   #14
imprezive
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I was not aware of your connections, in that case the s/c is gonna suck, in my opoinion. I would just get a turbo if it was only at 5 psi
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Old 05-14-2000, 01:42 AM   #15
NickSTi
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On that note shiv you gotta make a TEC-II system for the SC guys. How hard would that be? Email me privately if you want, but I am really interested.
Does this system replace a knock sensor? I dont see how but I did a little of reading on what you post. Plus the programming part seems a little hard too, you have to have the laptop and software for it. I still think it would be cheaper to get a $300 AFC, $300 ITC, and J&S Knock sensor. Cumbersome yes, but effective none the less. I am always open to the other side. Thanks.
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