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 Posted: Jul 16, 2019 06:14PM
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Quote:
Originally Posted by Dan Moffet
Maybe driving on two wheels much of that time, with the engine on end has something to do with it.
Ya think!

 

Michael, Santa Barbara, CA

. . . the sled, not the flower

      Poser MotorSports

 Posted: Jul 16, 2019 03:03PM
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CA
Maybe driving on two wheels much of that time, with the engine on end has something to do with it.

.

"Hang on a minute lads....I've got a great idea."

 Posted: Jul 16, 2019 09:34AM
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WOW! I wouldn't want to do that but I'm sure for those few hours it is a blast to drive haha

 Posted: Jul 15, 2019 01:50PM
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I saw a video the other day with Nick Swift talking to Chris Harris. Chris asked Nick about horsepower. Nick said his car was getting around 120 HP. I was envious until Chris asked about engine longevity. Nick said he gets 8 to 10 hours per engine. I was no longer envious.

 

Michael, Santa Barbara, CA

. . . the sled, not the flower

      Poser MotorSports

 Posted: Jul 15, 2019 11:58AM
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Quote:
Originally Posted by Alex
43 at the wheels is more than BL/Rover claimed for the later A+ at the crank...
I got the car from Japan using an auction service so no clue what may have been done to the motor other than the exhaust and wont know until I pull it out to replace it if anything is aftermarket so I just assumed it was stock. There are holes drilled in the dash for aftermarket guages and it has an electric fan that can be switched on if the car starts to get hot but thats all I really know about it. If I find any other modifications I will update. But that may be a while as I am currently daily driving the car.

 Posted: Jul 13, 2019 09:53PM
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GB
43 at the wheels is more than BL/Rover claimed for the later A+ at the crank...

 Posted: Jul 12, 2019 03:14AM
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Here are some dino numbers.

 Posted: Jul 10, 2019 02:31PM
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Quote:
Originally Posted by Alex
Great thread resurrection.

Can't find the printout right now, but the 998 in Betty did 60whp and 62 torques on a very accurate road with a 255 cam (essentially an SW5) which has now been upgraded to a 270 - should be a bit more in there.
I am pretty sure mine is stock with a K&N Air Filter and a slightly larger exhaust. We just ran it on the dyno for fun to get a baseline to compare when I ever get around to installing the B18 Honda motor I have for it. I wasn't able to find to many stock (stockish) dyno numbers so I had no clue what to expect and figured it would be good to share for people that are curious.

 Posted: Jul 9, 2019 10:34AM
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GB
Great thread resurrection.

Can't find the printout right now, but the 998 in Betty did 60whp and 62 torques on a very accurate road with a 255 cam (essentially an SW5) which has now been upgraded to a 270 - should be a bit more in there.

 Posted: Jul 7, 2019 09:53PM
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Youtube Mini 998 Dyno Run

43whp at 4500 rpm. She was still making power but i didn't want to push her any harder

 Posted: Jul 20, 2017 03:06PM
 Edited:  Jul 20, 2017 03:36PM
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2009. Not many race weekends on it but the last weekend before getting on the dyno I tried my new super handmade intake manifold which did not work, leaned it out to >16:1 so I had to back off just to finish the session.  Hoped I hadn't damaged the motor.  1293.  MED prepped block, crank, rods, pistons.  Ancient Longman inclined valve head.  Kent or Boffo cam, can't remember which, I think Kent.  Remote change early BMC SCCR box.  I think I had the 3.97 welded diff in it.  LCB with a muffler.  Electramotive crank trigger ignition. 

Got it on the dyno with the old single 45 Weber on a port-matched Warneford manifold and baselined it at 91hp and was very pleased with that.  Then put the splits on and made 90hp.  Dyno time is expensive and I wanted to know what was up my new manifold so that went back on and we started learning.  Over the next 90 minutes we made a bunch of jetting changes and finally figured out what the manifold wanted from the carb.  I ended up making 89 with the new manifold just before bangdadangdadangdadingbadadadadadada the #1 piston cracked.  Oh well, must have hurt it running too lean for too long.  But that manifold showed promise, it accelerated the dyno load from 4500 to 7500 in 4th faster than the other setups.

edit ... forgot to mention this was on Peter Shadowen's dyno.  All I did was sit in the car and try to put the throttle pedal through the floor, Peter did all the jetting changes.

 Posted: Jul 19, 2017 08:22PM
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Quote:
Originally Posted by Cheleker
In general, the more power you get out of a Mini engine with the usual changes (hot cams, for instance) the less drive-able it is. Great for a race track, but not something you'd want to hop into and drive to the grocery store.
I've got a hot cam and a bunch of other stuff that makes going to the grocery store a bit of a challenge. Low revs and big torque sounds pretty appealing. That being said, I'm impressed with the amount of low-end torque I do have. I've had a number of early turbo cars & a few bikes that had nothing until 5k RPM. I never knew what I was missing. Torque is good. I'm liking it!

 

Michael, Santa Barbara, CA

. . . the sled, not the flower

      Poser MotorSports

 Posted: Jul 19, 2017 07:59PM
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In general, the more power you get out of a Mini engine with the usual changes (hot cams, for instance) the less drive-able it is. Great for a race track, but not something you'd want to hop into and drive to the grocery store.

Add a good supercharger and back off on the compression (I was running 8:1) and you get an easy car to drive as well as one with LOTS of torque starting at low revs and lots of hp. The hard part is the "good supercharger" bit.

 Posted: Jul 19, 2017 06:47PM
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Good thread going on here. This has been enlightening as my "butt dyno" is not well calibrated. Personally, I've ridden in only three classic Minis, including my own. So I have no idea what to expect from a given build. And I suppose it matters if for no other reason than from a cost/performance perspective. Dollar$ equal horsepower and I'd like to think that I'm getting my money's worth. So, thanks for the lively discussion. 

Quote:
Originally Posted by Cheleker

...when it had the 1360cc engine with the supercharger running 8 psi. Taken in 84F degree weather. At the wheels. 110 whp at 6500 rpm (still climbing a little, but we backed off). 102 lb ft torque ~5100 rpm. (70 lb ft already at 1500 rpm)

That's BIG power. I was interested in supercharging my motor until I heard a couple of stories from fellows who were disappointed in the power gains they saw. The manufacturer claimed a 40+% increase in HP & torque. The consensus from these fellows was more like an 15-18% gain. Seemed like a lot of money for an additional 7 or 8 HP. Could'a been a tuning issue I suppose. Cheleker's numbers sound more like what I would expect.

I've been talking with a former Moss Motors employee at my local Cars & Coffee who, along with a "well known" parts manufacturer has developed a dedicated A-series blower that they claim produces big power without the usual reliability issues. He says it'll be on the market in a few months. Of course, he's been saying that since last August.

 

Michael, Santa Barbara, CA

. . . the sled, not the flower

      Poser MotorSports

 Posted: Jul 19, 2017 01:54PM
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Right, Jemal. Different dynos, but listing two car on the same dyno does give a hint. I have information from maybe 15 or more runs on that same dyno, but I thought the two opposites were more than enough for what this thread is about.

 Posted: Jul 19, 2017 10:46AM
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Just to be clear, those two were run on the same dyno, but not THIS one in the Sacramento area, right Chuck?

And yes, the 850 is the kind of engine that almost can't hurt itself.  Remember the Chrysler Slant Six?  Many decades ago my brother and I used to frequent the junkyards in East Palo Alto.  Back then wasn't too uncommon to drive a used-up car to the junkyard for beer money... those that knew the area then probably know what I mean  This old fellow was trying to junk a late 60s Dodge Dart and found a yard that gave him 10 bucks!  But he had to wait while they unloaded a truck of crushed cars.  He was antsy for his beer so we gave him $9.  Our auto-shop teacher loved the slant six! Used to say it was so bulletproof that you could put a brick on the gas pedal and it would just keep running.  Here was our chance to try it, right outside the junkyard gate!  We were sure it would either seize up dramatically, or (we hoped) blow up even more dramatically!  We got it running, jammed the gas pedal and "looked busy" a short distance away under the hood of our GTO.  We waited for the inevitable with baited breath.  A few guys looked out the gate, as did some passers-by, but they just shrugged and went about their business.  The 4-door Dart just made sort of a hissing sound at full throttle, among a slew of abandoned cars. 

We were impressed- and disappointed!  15, 20 minutes went by, but finally..... it ran out of gas!!  Later that day, we got the $10, and the yard-man poured some gas from a jar into the carb, and drove it in to it's grave.

 Posted: Jul 18, 2017 07:13AM
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The two I ran were done on the same dyno in slightly different weather. I've edited the post.

 Posted: Jul 18, 2017 05:50AM
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As Jamal say's with "this dyno" torque and horsepower numbers vary greatly with temp, humidity, barometric pressure, altitude, even latitude is taken into account for some reason with SAE correction factors. Still to read these numbers from a little tractor engine is amazing!

 Posted: Jul 17, 2017 07:34PM
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It's really only a comparison on a given Dyno, and I'm careful to say on THIS dyno.   I did notice the readout on my old run says "Flywheel Power", but that was the very same setup from the guys at Driving Ambition, and it does measure at the wheels.  The Unit connects to the drive flanges in place of your wheels.   A couple of years ago, our good friend Bruce Blair of Bruce's Morris Garage brought his absolutely stunning lavender '59 commemorative edition Minor, yes one of the "One Million" serial number cars.  Featuring a rebuilt 998 (rear wheel drive of course), this car was like going back in time, and he'd just driven it over the Sierra Nevadas so it was running perfect.  It huffed and puffed it's way to 22.5 HP on THIS dyno.

The day we ran mine was hot. Over 100 degrees, and the dyno area smelled like coolant from all the expansion overflow.  Other classic Minis that day included some 1380s I had built to the Mini Mania specifications. Those showed about 60 WHP on THIS dyno.  I always counseled AGAINST claiming HP numbers as MM does.  Certainly the claim of 113 or 120 HP from a 10 to 1 engine running standardish valve sizes is fiction!  These numbers make an interesting comparison, sometimes just to confirm what the "Butt dyno" tells us.

 Posted: Jul 17, 2017 05:38PM
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Quote:
Originally Posted by RedRiley
The only dyno my car will ever be on is the Butt Dyno. I couldn't care less how my car compares with anyone else's, or how many HP it's got. As long as it puts a smile on my face when I drive it, that's what it's all about.
I'm with RedRiley on this my 1293 does an honest GPS measured 103mph, how much HP does it make? 80?  Who cares it keeps up with traffic 

 

 

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