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  #21  
Old October 6th, 2003, 11:49 AM
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Josh
1994 #1695 Not stock.
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Rick,

As far as research on the sc, I did some, both my uncles are mechanics. Yes a supercharger does shorten the life of a motor, so does any hard driving. I had a supercharged Volkswagen Corrado, that I put 150,000 miles on and had no problems with the motor. As long as you care for the enigine, it should take care of you.

I purchased the SC used, it had 15,000 (I think)on it was around 1,500 dollars. About 18 hours of install time, very straight forward.

Many people suggested regearing, I went away from it as my defender is my daily driver, and I do a lot of highway miles.

Let me know if you have any other questions.

-Josh
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  #22  
Old October 17th, 2003, 08:43 PM
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Rick Carlisle
1997 Alpine White D-90 SW
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Well, for those interested, I received my ECU back today with the RPI chip installed and can give the following feedback.

While the 90 is still far from "fast", I am satisfied that my goal of having a bit more zip around town has been met. It is a similar experience to what I had previously with my BMW 528e. The truck seems to be on top of the power curve just a bit more and is more responsive. This is important to me as the vast majority of my driving is around town. The truck just doesn't seem to be as "sluggish" as before. Is it fast? Again, no it is not. But there is a difference.

I expect to get a little more zip when I install the Borla exhaust and the K&N filter. Again, I am not expecting a ton of power. Certainly not like you would get with an engine change. Just more drivability in town. And I would not begin to suggest this to everyone as I am sure many would not think the difference is significant enough. But for me, it is enough to warrant the expense.

Rick
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  #23  
Old October 19th, 2003, 12:00 PM
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Phillip
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coool. what was the cost and do you think there will be any positive effects on your fuel consumption
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  #24  
Old October 19th, 2003, 05:48 PM
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Yousef Hamzeh
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Glad to see that they worked for you.
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  #25  
Old October 19th, 2003, 07:50 PM
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Phillip,

I don't know about gas mileage. I've never checked it. It sucked before the chip and I imagine it still sucks!.

Rick
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  #26  
Old October 19th, 2003, 09:49 PM
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the cost was $490 plus I had to ship my ECU to California.
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  #27  
Old October 20th, 2003, 11:37 AM
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Josh
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How many HP do you think it gave you?
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  #28  
Old October 20th, 2003, 12:52 PM
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Jeffrey Rosbrugh
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Guys, sorry to fail/take long on the follow through. Hypertech does not currently offer any products for the D-90. Wrote them and e-mail, then called. They claim they don't have anything in their current product offering. Sorry it too me so long to follow back up, but work always seems to get in the way of the important stuff. Thanks Rick for the great feedback on the RPi chip. Now I have to figure out what to do! Not that I can afford to do anything, but that is secondary anyway. Thanks again!
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  #29  
Old October 20th, 2003, 01:51 PM
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Troy Smith
1995 D90 SW
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Question Speaking of chips??

I purchased some parts about a year ago for my 1995 D90 SW from a guy liquidating his Land Rover inventory. One of the parts is a "Cold Start Prom Chip" brand new in the box. What is this and what is it supposed to do exactly? Any advice is appreciated.

Thanks!

Troy
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  #30  
Old October 20th, 2003, 04:18 PM
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Dave Souza
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Troy:

The following is an excerpt from an email to the d-90 yahoo list from Doug Aitken re: the Eprom. I saved it because I was interested in getting one as well:

<snip>

I finally got round to swapping out my EPROM for the "Cold start" EPROM for a 3.9 ('94, '95) Disco to get rid of the annoying speed limiter which kicked in at just over 70 mph with my 4.10 R&P......

It could be purely psychological, but it seems like the engine runs much smoother and pulls better throughout the rev range (as well as the removal of the "brick wall"!).

Anyone else who has done this mod notice the same thing?

BTW: The part number has changed on this item: used to be PRM 3360A: it is now PRM 3652.

Doug A

<snip/>


I think you should install it and let us know if you see any difference!

-Dave
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  #31  
Old October 20th, 2003, 06:22 PM
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Josh,

They advertise hp increase from 188 to 206, and torque increase from 250 to 272. This is with the Gold 93, which requires 93 octane gas. I don't know if those are the increases I actually got.

I was thinking that one of the best ways to tell the difference is if you could have the new chip installed, drive the truck a few days, and then put the old chip back in. That way you could really see the difference. Unfortunately, it doesn't seem to be just a "plug and play" sort of change-out. At least, I don't think it is. That's why RPI requests you send the ECU to them to change out.

BUT, if those D90 owners out there who were more skilled with the electronics could do that, I think a truer picture of what the chip does would be realized. I only know I can tell a difference and I am satisfied.

Rick
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  #32  
Old October 21st, 2003, 11:59 AM
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Josh
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Thanks for the info Rick, I will most likely be doing this mod next month.
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  #33  
Old October 21st, 2003, 06:09 PM
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Jeffrey Rosbrugh
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Any idea where one might find one of these chips for sale? I could definetely change it out again and back to perform the test and would love to see the difference first hand.
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  #34  
Old October 21st, 2003, 06:16 PM
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Rick Carlisle
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Neo,
I purchased mine through Rover Connections.
Rick
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  #35  
Old December 2nd, 2003, 11:54 AM
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Arthur Maravelis
97 SW
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Anyone familiar with the RN offering for the '97 D90 - "The awesome Superchip"?

I'm thinking about what RPI says about a better setup motor - not just more power. Not that I find my D90 needs it. I do have an NRP, if that matters, but it feels pretty fast to me. Then again, this could be a false sense after the pain of driving a SIII 88 for a while!
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  #36  
Old December 2nd, 2003, 12:27 PM
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Doug Walker
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Mike Green at www.offroadexperience.com says that the stock camshaft on the 3.9 4.0 is pretty flat. Rover de-tuned the engines by flattening the cams. (BTW, Mike's dad built the first V8 LR here in the states under contract to LRUK.) Replace cam, but be sure to do it so that you still meet your state's emissions standards.

DW
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