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general notices, announcements, invitations, & social stuff (like meets & car shows)

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Mr. T
Tony Andrews
Kent Island, Maryland
(153 posts)

Registered:
10/23/2007 03:59PM

Main British Car:
'75 mgb, '74 grille, morspeed bumpers Rover 3.9

authors avatar
Dyno results?!
Posted by: Mr. T
Date: November 29, 2009 08:38PM

Sure would be nice to see the results of those dyno runs from the 2009 Meet!


mowog1
Rick Ingram
Central Illinois
(1502 posts)

Registered:
10/17/2007 09:36PM

Main British Car:
1974.5 MGB/GT 3.9l Rover

authors avatar
Re: Dyno results?!
Posted by: mowog1
Date: November 29, 2009 11:05PM

Maybe Max has them.


TR6-6SPD
Ken Hiebert
Toronto Ontario
(248 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

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Re: Dyno results?!
Posted by: TR6-6SPD
Date: November 30, 2009 12:15AM

Tony,
While we're waiting for the results, here's a video of one of the participants:
[www.youtube.com]


Mr. T
Tony Andrews
Kent Island, Maryland
(153 posts)

Registered:
10/23/2007 03:59PM

Main British Car:
'75 mgb, '74 grille, morspeed bumpers Rover 3.9

authors avatar
Re: Dyno results?!
Posted by: Mr. T
Date: November 30, 2009 09:43PM

"DynoBeast",

Have your specs changed from the 2007 dyno (255hp/301tq)? She is a beauty (the car Ken :)) and I'll say it again - those wheels you switched to were the icing on the cake!


TR6-6SPD
Ken Hiebert
Toronto Ontario
(248 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Dyno results?!
Posted by: TR6-6SPD
Date: December 01, 2009 10:33AM

Hi Tony,

You know they say a dyno test results should only be used as a tool and not bragging rights since the numbers can vary and looking at the two charts for this car, I believe that to be true.

The first test on a Dynojet unit using a "standard" correction factor. I spoke with the shop this morning and they used to do a print out using the standard CF and the "SAE J1349" CF. Now, for some reason, they just print out the results using standard, (suppose to give about an 8 HP increase). Chart:
tr6 top mod 021.jpg
So, now it's off to Carolina Auto Masters at the BV8 meet. I also spoke to them this morning. They're using a Dynojet unit appling the SAE J1349 CF. I expected a lower reading based on the fact that the standard CF displays a higher number. The guys at Carolina do alot of work on these LT1/LS1 engines and before they did a run, he had correctly predicted the HP and Torque results. They know their stuff. Chart:

KenHiebert-SL.jpg

So why was the SAE CF test higher than the Standard CF test? Beats me.


tr6turbo
Dale Knapke
Sidney, Ohio
(169 posts)

Registered:
08/24/2008 09:44PM

Main British Car:
1972 Triumph TR6 Ford 2300, 4 Cyl Turbo

Re: Dyno results?!
Posted by: tr6turbo
Date: December 01, 2009 05:27PM

Tony, I had my TR6 at the V8 Meet but put a rod out the side of the block on the way down doing some drag racing. Anyway I was very disappointed not being able to take part in the dyno session. When I got home i put a new short block in the car and I was off to the dyno to see what it could have done at the meet. It did 400 HP and 400 ft lbs at the rear axle. Now I am even more disappointed that I was not able to make that run in front of my peers.


kstevusa
kelly stevenson
Southern Middle Tennessee
(943 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

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Re: Dyno results?!
Posted by: kstevusa
Date: December 02, 2009 08:14AM

Dale! us V8 guys are tickled you did not make a Dyno pull. Would have been embarassing. We were not pleased that you had the engine problem. You have some very impressvie numbers and look fwd to seeing you at Indy. Really glad the head was not damaged.


MGBV8
Carl Floyd
Kingsport, TN
(3946 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

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Re: Dyno results?!
Posted by: MGBV8
Date: December 02, 2009 05:41PM

THE head?!

Somtin' wrong with dat! ;)


Mr. T
Tony Andrews
Kent Island, Maryland
(153 posts)

Registered:
10/23/2007 03:59PM

Main British Car:
'75 mgb, '74 grille, morspeed bumpers Rover 3.9

authors avatar
Re: Dyno results?!
Posted by: Mr. T
Date: December 02, 2009 06:47PM

Ken - vairdy inderestink......your hp is fairly close, but your torque was 20% higher (that's a lot lot) in Durham vs Toronto and on your second run in Durham it was 10%+ (that's a lot) lower than the first run - #'s higher overall ilo the higher o/s temp and humidity too.

Dale - yeah, I saw the grenade pics. Try to post results - would love to see the curves. Assume you were in fighting trim with 35 lbs of boost?

Anyone got a guestimate on what to add back-in for flywheel #'s on a Mustang dyno (much more expensive dyno than the dynojet type and supposedly more accurate)? I always assumed I had a stock rover 3.9 cam in mine - that panned out on the torque curve on a dyno run I had quite awhile ago - looked like a brazilian cliff diver @ 3000 rpms.


tr6turbo
Dale Knapke
Sidney, Ohio
(169 posts)

Registered:
08/24/2008 09:44PM

Main British Car:
1972 Triumph TR6 Ford 2300, 4 Cyl Turbo

Re: Dyno results?!
Posted by: tr6turbo
Date: December 08, 2009 05:52PM

I don't have my curves in digital form and i am not sure how to post it here. Let me see what I can do. I was at 24 pounds of boost. 26 is about max for me since I only run pump gas.


madmax
Max Fulton
Durham, NC
(186 posts)

Registered:
10/19/2008 07:45PM

Main British Car:
1974 1/2 MGB 1972 MGB 1977 V8 project 1972 B r 1860 cc

Re: Dyno results?!
Posted by: madmax
Date: December 10, 2009 07:45AM

Hey All:

I believe I gave the full list of dyno results to Curtis to post in the "overview" of the meet (with all the other "results", like karting, etc.)

First, Ken's runs: a) the "high" torque of the first run is the tire slip when he's first engaging. (The "premature peak".) These are usually ignored. b) Ken's computer isn't properly tweaked and you can see in both the Toronto and Durham runs that his mixture slowly tanks as the revs go up. This explains his curve "flattening out". Usually the torque and HP curves will cross at 5250 rpms and the HP will continue upwards. With the mixture dropping below 12 to 1 Ken is losing hp.... c) Yes, my dyno guy Jeff nailed it on the head. Asked if it was a stock LT1, then said "It'll do 270...." :-)

RE: driveline loss. Jeff says the modern cars are around 15%. Though we didn't get a chance to PROVE it (this is what Targett's racecar was going to be for. He has ENGINE dyno numbers and we would then have been able to compare with Chassis Dyno numbers. Alas, he broke his clutch at the Gold Cup!) we've found the "older" drivelines to lose more like 20%, and sometimes nearly 25%... It seems the lower the output, the more likely the loss is a higher percentage, probably due to overcoming inertia that is more dependent on number of gears, moving parts, etc., than what is actually thrusting down the shaft... :-)

M


kstevusa
kelly stevenson
Southern Middle Tennessee
(943 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

authors avatar
Re: Dyno results?!
Posted by: kstevusa
Date: December 10, 2009 09:53AM

Thanks Max for the update on the number's. Hopefully Curtis will have the next issue & info ready soon. The Drive line loss #'s are helpful and generally used for 15% to 18% as representative #'s for FWHP & Torque. Thanks again for a GREAT meet!


danmas
Dan Masters
Alcoa, Tennessee
(577 posts)

Registered:
10/28/2007 12:11AM

Main British Car:
1974 MGBGT Ford 302

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Re: Dyno results?!
Posted by: danmas
Date: December 10, 2009 03:23PM

"Usually the torque and HP curves will cross at 5250 rpm"

Torque and HP curves will ALWAYS cross at 5250. HP will ALWAYS be higher than torque above this point, and will ALWAYS be lower below this point.

The dyno measures torque, and then calculate HP using this formula:

HP=torque*RPM/5250

RPM/5250 is less than 1 below 5250, more than 1 above 5250, and equal to 1 at 5250.

Just one of the reasons I consider HP to be a worthless number.


rficalora
Rob Ficalora
Willis, TX
(2683 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: Dyno results?!
Posted by: rficalora
Date: December 10, 2009 04:06PM

Now that's vairdy inderestink.


Mr. T
Tony Andrews
Kent Island, Maryland
(153 posts)

Registered:
10/23/2007 03:59PM

Main British Car:
'75 mgb, '74 grille, morspeed bumpers Rover 3.9

authors avatar
Re: Dyno results?!
Posted by: Mr. T
Date: December 10, 2009 06:26PM

Hey Max - thanks for responding to pm and posting. You and Emily did a GREAT job.

After that afternoon of karting, I actually had to pass on the pizza and beer - I beat the @$%& out of myself -
all muscle and no finesse!


"He has ENGINE dyno numbers and we would then have been able to compare with Chassis Dyno numbers." - Uh, Robbie - is your engine out of your car while it's being painted ;>)


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5935 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Dyno results?!
Posted by: BlownMGB-V8
Date: December 11, 2009 09:42AM

OK dyno guys, answer me this if you can. How much airflow does it take through the engine to produce 1 hp? (or 300, or 500) and what is the conversion to mass?

Jim


tr6turbo
Dale Knapke
Sidney, Ohio
(169 posts)

Registered:
08/24/2008 09:44PM

Main British Car:
1972 Triumph TR6 Ford 2300, 4 Cyl Turbo

Re: Dyno results?!
Posted by: tr6turbo
Date: December 18, 2009 05:58PM

Thanks to Curtis here are my dyno results. As you can see it does not have much torque down low. Nothing like what Ken has.

DaleKnapke-DynoResults[1].jpg


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