My thread has now evolved to a point i dont even know / cant understand, whats being said lol

I would have thought that a dyno is a tool for measuring either improvements or degradation of engines before and after modification. The CHANGE of figures surely is the important bit. HP figures by themselves dont mean a great deal to me.Lap times and 1/4 ET's mean more to me.

I agree, but quarter mile and lap times are not a direct correlation to engine hp. Change your tyres and your quarter mile/lap times will change. I think they're more important for measuring a car as a whole package, but not much good for comparing cars.

By the same token, modifying an engine and testing it on the track is (well, I think anyway) the best way of testing your changes. It gives a 'real world' scenario. So you change your carby and get more power and torque - but if you lose engine responsiveness that might not show until you hit the track. But doing a lap after each tune isn't really an option.

Not sure what the confusion is.

You asked what is the most HP. The biggest claims so far are quoted as BHP recorded from an engine dyno. Some people are considering that the correction factors are some how inflating the results, possibly true, but of little consequence if pre corrected torque at rpm is shown.

I have suggested that the dyno calibration be shown. If it is done correctly and the numbers correlate then that's it. Done.

There is no reason engine dynos in good working order that are calibrated should read differently by more than a couple of %.

Maybe one of these massive BHP engines could go to another engine dyno?

Surely if you back your product and the figures a calibration to start and arrange to run on another engine dyno should be a great opportunity?

Where are any other engine dynos locally?

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Breaking heaps of stuff isn't the same as R&D since the "R" implies you actually did some research

G&H is the most applied practice by performance engine builders

G = Guess & H = Hope

Hi gulabill
Why don't you come around and I will do it while you are here.
Graham Russell

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"It's better to be not informed than ill-informed"

Well for starters I'm too far away to just drop in, more importantly though, showing me isn't going to achieve anything as I'm not questioning your dyno or results or your CF I'm simply stating that if you do those things and it's all good that should put an end to it, the numbers will be legitimate and they'll be on here for all to see.

As for putting one of your engines on another engine dyno, which would also require proof of calibration, the numbers should come up about the same, the proof goes on here, job done.

Question answered = A series with most hp

_________________
Breaking heaps of stuff isn't the same as R&D since the "R" implies you actually did some research

G&H is the most applied practice by performance engine builders

G = Guess & H = Hope

Same dyno, same day.

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

Looks like this thread was going drop off page 1 so I thought I bring some useful information to it.

http://www.superstreetonline.com/how-to ... ower-loss/

_________________
Breaking heaps of stuff isn't the same as R&D since the "R" implies you actually did some research

G&H is the most applied practice by performance engine builders

G = Guess & H = Hope

But just for fun lets contradict the previous post.

Hours fun from this one.

http://www.mk5cortinaestate.co.uk/calculator4.php

106 WHP (Wheel Horsepower) to BHP (Brake Horsepower) for FWD with Manual = 129 BHP (Crank)

And lets throw SAE J1394 CF at it = 86F 35% 29.9"Hg = 1.001 = 1.001 x 129 = 129.129 BHP

And with SAE J1394 AUG 1994 (revised) as above = .983 = .983 x 129 = 126.807 BHP

Edit. 1994 should be 2004
In August 2004 the SAE released J1349 Revised AUG2004 which specifies that the preferred method of determining the friction power used by the motor accessories is actual measurement, and that the assumption of 85% mechanical efficiency (as formerly used in SAE J1349 Revision JUN90) should only be used when actual friction data are not available.
Section 5.1 of the SAE J1349 AUG2004 revision also makes it clear that this correction factor is not intended to provide accurate corrections over an extremely wide range, but rather that the intended range of air temperatures is 59 to 95 deg F, and the intended range of dry air pressures is 26.58 to 31.01 inHg.

Or

115 WHP to BHP = 139 BHP

Or

How much WHP do you need to make 160 BHP ? = 134 WHP

GR how's the calibration coming along?

_________________
Breaking heaps of stuff isn't the same as R&D since the "R" implies you actually did some research

G&H is the most applied practice by performance engine builders

G = Guess & H = Hope

My 2c...
I'd say a Mini gearbox has far more power loss through it (in 3rd gear) then your usual FWD box, which has no drop gears.
On the MRC Castle Hill (dyno dynamics) dyno it was usual to run turbo Minis in 4th gear, all other Minis in 3rd. Another variable...

[edit]
I have just been down and checked GR's dyno setup; the 50lb calibrated weight, 3lb arm weight, and radius is 2.0 ft- laser measured, and the loadcell gauge was reading 105 ft/lb. Should read 106, it's 1ft/lb short.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

In August 2004 the SAE released J1349 Revised AUG2004 which specifies that the preferred method of determining the friction power used by the motor accessories is actual measurement, and that the assumption of 85% mechanical efficiency (as formerly used in SAE J1349 Revision JUN90) should only be used when actual friction data are not available.
Section 5.1 of the SAE J1349 AUG2004 revision also makes it clear that this correction factor is not intended to provide accurate corrections over an extremely wide range, but rather that the intended range of air temperatures is 59 to 95 deg F, and the intended range of dry air pressures is 26.58 to 31.01 inHg.

What the above SAE statement is saying is that from June 1990 through to August 2004 the correction factor made provision for items like the alternator, power steering pump and A/C compressor.

The CF prior JUN1990 was changed as it had unrealistic weather baselines.

_________________
Breaking heaps of stuff isn't the same as R&D since the "R" implies you actually did some research

G&H is the most applied practice by performance engine builders

G = Guess & H = Hope

Thread locked. We know who you are and what is happening.

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates