Topic for an argument
Discussion
i dont understand what all the fuss is about over dyno testing !roller dynos have been used for years and work!!,they maybe vary a little but dose it matter? you either want a base run before mods or just to see what it is doing.I was at WRC on saturday and it was spot on,i have been on emeralds dyno to map the motor and the readings are what i would be expecting.I run a bike dyno and we have the same disputes but 99% of the time they are the people that are showing poor power for all the money they have spent !,it would be nice to see a list of modifications and the resulting power (at the wheels is best thats where it gets used!! and torque).I wonder why people didnt run there cars it was free !!! thanks WRC
I did run mine (and have thanked Allen, thank you again)
Not 'cos I am a cheap northerner "owt for nowt and I'm furst the'ere" - Yorkie you know what I mean (damn you got me I am a cheap notherner hehehe) but because I am interested.
I was a virgin up until last weekend and am learning lots.
Add to which I am interested in the other systems, any other systems as I have been invited to a dyno day up here with friends.... so I will be interested in that toooo.
Might be someting to do with my business and profession, but demo, trial and testing is what I am about.
This weekend was the first opportunity I have had to do it and it would be nice to do it again, with you lot???
Not 'cos I am a cheap northerner "owt for nowt and I'm furst the'ere" - Yorkie you know what I mean (damn you got me I am a cheap notherner hehehe) but because I am interested.
I was a virgin up until last weekend and am learning lots.
Add to which I am interested in the other systems, any other systems as I have been invited to a dyno day up here with friends.... so I will be interested in that toooo.
Might be someting to do with my business and profession, but demo, trial and testing is what I am about.
This weekend was the first opportunity I have had to do it and it would be nice to do it again, with you lot???
For the record, i didnt run car as a personal preference. Never seen a damaged car come off a hub machine, and to be honest couldnt see what was being done to the cars to be comfortable putting my hard earned on a machine. If I push it, break it etc fine, but not putting it the hands of someone i don't know to prove something that i dont need to know.
Have a std car. It drives fantastically. looks great, sounds superb, and draws sooo many admiring comments it almost becomes embarassing (almost!) I have nothing to prove by putting on a dyno, and attended as was interested to see other owners, cars and how a shootout happens.
If had known that a condition of attending was to have car on the machine, i would have declined to attend.
This forum was meant to about enthusiasts sharing a common interest, passion and information for similar cars of oz origin. At the moment it seems it is being used like a school playground for petty comments and baiting.
No good to no one, just peoples ego's.
Drive on.
>> Edited by caspy on Monday 15th August 20:52
Have a std car. It drives fantastically. looks great, sounds superb, and draws sooo many admiring comments it almost becomes embarassing (almost!) I have nothing to prove by putting on a dyno, and attended as was interested to see other owners, cars and how a shootout happens.
If had known that a condition of attending was to have car on the machine, i would have declined to attend.
This forum was meant to about enthusiasts sharing a common interest, passion and information for similar cars of oz origin. At the moment it seems it is being used like a school playground for petty comments and baiting.
No good to no one, just peoples ego's.
Drive on.
>> Edited by caspy on Monday 15th August 20:52
It does seem strange that RR numbers annoy people.
A RR is a tuning tool, nothing more. For before and after while mapping a car, it is an excellent tool.
For giving people power estimations, its not so good, as so many things can affect readings.
Ive only been near 2 sets of rollers in my life. Once at Well Lane with my old car about 4 years ago, with an old rover V8 TT. With 6 people sitting on the rear to stop wheelspin ( yes 6....crap rollers ) it claimed 411bhp, and that was with a missfire. I'd be a little sceptical of that figure, but it makes nice reading.
Then 2 years ago, at G-Force. New car, but with a similar RV8 TT engine again. This time, again with missfires it made 280bhp. This didnt make sense, and is obviously not correct. Why it was missfiring is a mystery, as on the road it ran perfectly. The following day it ran 12.5 @ 120mph. A 1700kg car isnt doing that with 280bhp !
It wasnt a fault of the rollers, I was very impressed with their setup.
But it does show that RR results arent the be all end all. Its nice to get big numbers. But its even nicer to have the ability to go fast, despite what the numbers suggest.
RR shootouts are for pub talk, nothing else. Its how it performs on the road or strip that really matters, and will show a cars power better.
That said, I do want to get my new LS1 engine dynoed. Hopefully I wont be plagued by the mystery missfire if I do.
>> Edited by stevieturbo on Monday 15th August 20:57
A RR is a tuning tool, nothing more. For before and after while mapping a car, it is an excellent tool.
For giving people power estimations, its not so good, as so many things can affect readings.
Ive only been near 2 sets of rollers in my life. Once at Well Lane with my old car about 4 years ago, with an old rover V8 TT. With 6 people sitting on the rear to stop wheelspin ( yes 6....crap rollers ) it claimed 411bhp, and that was with a missfire. I'd be a little sceptical of that figure, but it makes nice reading.
Then 2 years ago, at G-Force. New car, but with a similar RV8 TT engine again. This time, again with missfires it made 280bhp. This didnt make sense, and is obviously not correct. Why it was missfiring is a mystery, as on the road it ran perfectly. The following day it ran 12.5 @ 120mph. A 1700kg car isnt doing that with 280bhp !
It wasnt a fault of the rollers, I was very impressed with their setup.
But it does show that RR results arent the be all end all. Its nice to get big numbers. But its even nicer to have the ability to go fast, despite what the numbers suggest.
RR shootouts are for pub talk, nothing else. Its how it performs on the road or strip that really matters, and will show a cars power better.
That said, I do want to get my new LS1 engine dynoed. Hopefully I wont be plagued by the mystery missfire if I do.
>> Edited by stevieturbo on Monday 15th August 20:57
[quote]I didn't know there was a difference - but hey I only drive it. One thing puzzles me though. When I measured the pressure in my rear tyres after the dyno they were only at 30psi. I thought they were all being set at 40psi. Will it make that much difference to the results as the dyno chart shows 40psi as the tyre pressure?
BTW I have now set them to 36psi.
If you all were dyno'd properly, you should of all of had 40 psi in tyres, otherwise you're gonna get false figures.
>> Edited by i just want one on Monday 15th August 21:05
BTW I have now set them to 36psi.
If you all were dyno'd properly, you should of all of had 40 psi in tyres, otherwise you're gonna get false figures.
>> Edited by i just want one on Monday 15th August 21:05
I do want to get it on a dyno for 2 reasons. 1 is of course pub talk lol
The other is to see what sort of power curve my camshaft is giving. It does seem to make a bit of power, and really does sound cool at idle. But I do think a milder cam would give as much top end, and more down low. There's just so much conflicting advice out there, and for me to try different profiles, without a dyno, is difficult.
At least if I had a dyno plot, I could happily swap the cam and get another plot sometime, and compare.
But more importantly, I want to get to Santa Pod. It would be nice if I could do both on the same weekend.
The other is to see what sort of power curve my camshaft is giving. It does seem to make a bit of power, and really does sound cool at idle. But I do think a milder cam would give as much top end, and more down low. There's just so much conflicting advice out there, and for me to try different profiles, without a dyno, is difficult.
At least if I had a dyno plot, I could happily swap the cam and get another plot sometime, and compare.
But more importantly, I want to get to Santa Pod. It would be nice if I could do both on the same weekend.
It would most likely be a short notice thing, although I do appreciate that may make getting a spot on some rollers tricky.
I need to see what RWYB dates are on, but most important...the weather.
Weather forecast must be good, which is why it would be a short notice thing. Im not taking a risk booking 4-5 weeks in advance, only to find forecast says rain.
I'd like maybe mid September sometime. I'm still off the road at present anyway, waiting on a rear wheel bearing. I'm also thinking about fitting an alky kit ( yank speak ) and squirting some methanol.
I do have an aquamist at present, squirting some water/meth, although their pumps arent really up to the job in flow terms.. I havent really done any back to back testing with it though. I just added it as a safety measure, mostly as I intended to do a top speed run at Elvington, which is 1.25 miles flat out.
I need to see what RWYB dates are on, but most important...the weather.
Weather forecast must be good, which is why it would be a short notice thing. Im not taking a risk booking 4-5 weeks in advance, only to find forecast says rain.
I'd like maybe mid September sometime. I'm still off the road at present anyway, waiting on a rear wheel bearing. I'm also thinking about fitting an alky kit ( yank speak ) and squirting some methanol.
I do have an aquamist at present, squirting some water/meth, although their pumps arent really up to the job in flow terms.. I havent really done any back to back testing with it though. I just added it as a safety measure, mostly as I intended to do a top speed run at Elvington, which is 1.25 miles flat out.
In fact, maybe we should have a meet at Santa pod or shakey towards the end of the season at a RWYB day.
Horsew Power numbers is all good, but what can YOU make it do on the track???
As i've posted elsewhere, my best time is 13.9 @100mph.
What do you reckon Jagsy??
I've suggested later in the year as during the summer, the queues get far to long and full of Corsa,s.
Horsew Power numbers is all good, but what can YOU make it do on the track???
As i've posted elsewhere, my best time is 13.9 @100mph.
What do you reckon Jagsy??
I've suggested later in the year as during the summer, the queues get far to long and full of Corsa,s.
Sounds good.
Elvington is even better for me thanks StevieT
Seriously its not a me thing, I'm trying to get ALL involved.
I would love to do both, another dyno and a drag run.
Again a drag run would be good for me as I have not done one yet-----and re earlier posts tonight, if there is interest, why limit it to one drag meet when you can do several, aha just like another dyno run.
Talking of drag.......... no better not go there.
I've said alot tonight, trying to get people together more often to discuss topics of our interest. If you want something setting up whether a dyno or drag meet let me know either on here or via email - it will be nice to see you. If you don't I will sit down quietly smiling.
Elvington is even better for me thanks StevieT
Seriously its not a me thing, I'm trying to get ALL involved.
I would love to do both, another dyno and a drag run.
Again a drag run would be good for me as I have not done one yet-----and re earlier posts tonight, if there is interest, why limit it to one drag meet when you can do several, aha just like another dyno run.
Talking of drag.......... no better not go there.
I've said alot tonight, trying to get people together more often to discuss topics of our interest. If you want something setting up whether a dyno or drag meet let me know either on here or via email - it will be nice to see you. If you don't I will sit down quietly smiling.
I'm intrigued by people who constantly want to measure how much power their engines put out. If your car is fast, it's fast, if it beats all the cars you encounter, it's fastest. if you want a race, go to a drag strip and race it to see how fast it is. Power is nothing without the ability to deploy it. IMHO. LOL.
Anyone suspicious of dyno/rolling road/hub systems figures is not wrong. I've seen plenty of systems where the operator could show the customer exactly the figures either they did, or didn't, want to see depending on what the operator was trying to achieve.
Assuming an honest operator, their skill at using the equipment and setting up the vehicles is also important.
Your best bet is to use the people/equipment you're most comfortable with, and don't worry too much if readings on other equipment are a bit different. A lot different is another issue.
And on that issue, our equipment and WRC's are reading pretty close (not too surprising as they're almost identical). Our vehicle which showed 442bhp was tested to that power (actually nM equivalent - oh don't start) in Oz. If you want to compare our cars with theirs, the DD chassis dyno will do it.
This equipment is primarily a tuning tool, only secondarily useful for power readings (however interpreted or extrapolated). Still, it's fun to have these 'shootouts' as most of us are too old or too chicken to duke it out personally, despite some of the bad tempered posts our little 'community' manages sometimes.
The Monaro/Commodore is a pretty unsuitable vehicle for standing 1/4 miles, but we're all in the same boat, so it's an even playing field. It would be fun to get everyone together for a blast up Santa Pod. No excuses about not liking the equipment then.... Only joking, but if we're going to do this a bit of friendly baiting is pretty essential.
Tim@Linden Special Vehicles, who would also be happy to set a benchmark.
>> Edited by timala on Tuesday 16th August 20:18
Assuming an honest operator, their skill at using the equipment and setting up the vehicles is also important.
Your best bet is to use the people/equipment you're most comfortable with, and don't worry too much if readings on other equipment are a bit different. A lot different is another issue.
And on that issue, our equipment and WRC's are reading pretty close (not too surprising as they're almost identical). Our vehicle which showed 442bhp was tested to that power (actually nM equivalent - oh don't start) in Oz. If you want to compare our cars with theirs, the DD chassis dyno will do it.
This equipment is primarily a tuning tool, only secondarily useful for power readings (however interpreted or extrapolated). Still, it's fun to have these 'shootouts' as most of us are too old or too chicken to duke it out personally, despite some of the bad tempered posts our little 'community' manages sometimes.
The Monaro/Commodore is a pretty unsuitable vehicle for standing 1/4 miles, but we're all in the same boat, so it's an even playing field. It would be fun to get everyone together for a blast up Santa Pod. No excuses about not liking the equipment then.... Only joking, but if we're going to do this a bit of friendly baiting is pretty essential.
Tim@Linden Special Vehicles, who would also be happy to set a benchmark.
>> Edited by timala on Tuesday 16th August 20:18
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