97 NAS D90 dyno daze - Defender Source
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  #1  
Old May 9th, 2007, 01:41 PM
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97 NAS D90 dyno daze

For all those that have asked about chips and such we are doing a project now that will find out the real data. On Friday we will be doing some dyno pulls on a low miles 97 D90 for base line. Then we will be installing a Pursuit 4.6 that we will test, then upgrade the ECU and more tests, all on the same vehicle.
So the answer to what the stock ECU does with a 4.6 under the hood will be answered with hard data. It'll be on the ECR site as we get it done.
We will be doing the same with the 14CUX system later this summer.
Just FYI.
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  #2  
Old May 9th, 2007, 11:20 PM
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Mark M
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Thanks Mike for sharing this information. It should be very interesting. There's a shop close by that I've been told will do three pulls for $60. My truck has had heads, trumpet, exhaust, and Mark's chip so interested to see how it compares to stock and 4.6 Pursuit. The odd variable is the 5600 ft altitude. Mark
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  #3  
Old May 10th, 2007, 11:08 PM
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sorry in advance to those I make mad, but why? replace a crappy motor with another crappy motor? it is a bop factory setup, so why is everyone so against technology for a real replacement with distributer less operations. spent some time on the dyno last week and turned out 578rwhp on the vette.
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  #4  
Old May 11th, 2007, 06:22 AM
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Hows that 'vette run on the trails.....


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new expansion complete. Not only are we the only Rover shop in Eliot Maine...now we're also the biggest.

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  #5  
Old May 11th, 2007, 06:50 AM
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Quote:
Originally Posted by huck1974
sorry in advance to those I make mad, but why? replace a crappy motor with another crappy motor? it is a bop factory setup, so why is everyone so against technology for a real replacement with distributer less operations. spent some time on the dyno last week and turned out 578rwhp on the vette.

Well... #1 because it is what our customers want.
#2 because it retains the vehicles resale value being "all Rover" (agree with that or not it is part of the market.) I'm not a purist so don't get into that debate. One of the more fun trucks I have built was a SIII 88 with a Ford 5.0 an NV4500 and a Dana 300.
#3 because the 97 D90 is a distributorless ignition system that is fully tunable (hence the reason we are going to show the dyno results)
#4 because it bolts in with no mods needed.
#5 because I've worked on 100s of Range Rovers with well over 200K miles on those "crappy engines"
#6 because I get emails every day asking about the details of 4.6 installs

How about you start your own thread that is something like "why not to install a 4.6" or "facts why Rover V8s suck", because jumping into this thread with your dislike for the subject is just you shooting off your mouth. If you don't care for the subject, don't read it. Your post didn't add anything to the info and you didn't put forth any options either.

My Mustang with the Saleen blower puts out about 430 RWHP... but so what. Its a Mustang. That has nothing to do with offering some data to the large number of folks here that have, or want to install a 4.6 into their 90s.
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  #6  
Old May 11th, 2007, 11:30 AM
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I guess I went a little defensive a little too fast at someone who was just talking to talk...not to answer or help.
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  #7  
Old May 11th, 2007, 01:54 PM
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Just back from the dyno.
Stock '97 NAS D90 4.0 was 133 WHP and 171 WT
Nice torque curve though, it just needs more of it.
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  #8  
Old May 11th, 2007, 01:59 PM
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Charles Galpin
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Mike, for the benefit of the noobs, can you speak slower and spell out the meaning of the readings so we can learn?

WHP = Something Horse Power?
WT = Something Torque?

Shouldn't there be an rpm reading with those?

thanks
clueless
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  #9  
Old May 11th, 2007, 02:07 PM
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The HP readings are at the wheel (WHP) not at the flywheel, so they seem low, but a lot of HP is being lost because the DynoJet measures what the truck puts to the pavement, not what the typical factory figures are where they measue in a best case situation at the flywheel.
I'll be posting the graphs to the ECR site, but just wanted to post those basic figures as soon as I had them.
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  #10  
Old May 11th, 2007, 02:16 PM
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Thanks for your effert Mike I can't wait for some other numbers
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  #11  
Old May 11th, 2007, 02:36 PM
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Sure would be cool if someone Dyno'd a 14CUX D90 with a stock 4.6 biuld (3.9 top end) with a RRC 4.2 chip and crower cam. Before and after of course.
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  #12  
Old May 11th, 2007, 03:46 PM
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For those interested before I have time to write things up for the web site, here is the dyno sheet:

http://www.eastcoastrover.com/Dyno/pass1large.jpg

Its the pull shown in Red, the Blue one was just a test to make sure everything was working.

This is a 1997 NAS D90 with less than 50K miles that has no known issues and has been well taken care of.
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  #13  
Old May 11th, 2007, 05:12 PM
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Mike, Thanks for sharing!

The most impressive numbaer was that the truck hit 95 MPH strapped down to the dyno!
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  #14  
Old May 11th, 2007, 05:24 PM
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Quote:
Originally Posted by mhansen
Mike, Thanks for sharing!

The most impressive numbaer was that the truck hit 95 MPH strapped down to the dyno!
Its amazing how fast they seem without the wind resistance.

Just under 95mph is where the speed limiter kicks in with the stock ECU. Max torque and HP were prior to that though, so it didn't really matter.
With the new ECU chips the speed limiter will be gone.

The guy at the dyno place has a 700 RWHP Supra... he says it can hit near 200 mph on the Dyno... yikes (fun, but yikes). I saw the car... I believe him.
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  #15  
Old May 11th, 2007, 05:35 PM
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Is this F1 dyno down in portland?
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  #16  
Old May 11th, 2007, 06:25 PM
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I can understand keeping everything rover. good numbers. I can understand meeting your customers needs. Thats good business. I just don't have a problem using the same (gm technology) except much newer to put out better economy and power. That is not for everyone though. I will not call anyone names.
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  #17  
Old May 11th, 2007, 08:30 PM
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Mike, how do they deal with the all wheel drive.....
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new expansion complete. Not only are we the only Rover shop in Eliot Maine...now we're also the biggest.

"Dedicated to the resurrection of junk through engineering?"
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  #18  
Old May 11th, 2007, 09:43 PM
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there are awd dynos. The closest one to me is Kansas City. if that is what you are asking
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  #19  
Old May 11th, 2007, 10:16 PM
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Thanks for the explanation Mike.

I have another question though. Just like WHP is a more realistic number than at the flywheel, does the fact that there is no resistance on the dyno end up giving similar skewed results compared to reality then? Or would the horsepower and torque numbers be exactly the same but at lower speeds on the road? Or does the dyno give road like resistance already and were just talking a lack of air resistance here? Just curious.

thanks
charles
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  #20  
Old May 11th, 2007, 11:37 PM
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Yeah, F1 in portland has an AWD dyno.
http://www.f1dyno.com/
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