No B.S... How much Horse Power?
- Thread starter HILCLMR
- Start date
H
hatchers
Well-known member
dude you dont get the point, a dyno number can be tweeked in every direction....its not a "apples to apples" type of thing
Actually it is you who does not get the point......the question again "No ones ever dyno'd a M8 Turbo?"
I did not ask to compare apples to turbos or oranges or any other kind of fruit, nor did I ask how a turbo works or the engineering theory on it or who's kit is the best. I simply wanted to know what people are getting for horsepower on their sleds (specifically M8).
If you don't have a dyno number then ok, but I did not ask for a tutorial on turbocharging. Nor do I need one.
I have otherwise got some very good advice from some builders out there and has helped me make the decision that is right for me.
thanks so much for the replies.
Very interesting to watch this thread turn into a run away like it did.
For all the good (off topic information and discussion) its a pretty good thread.
But,, NONE of the discussion was directed to the original posters question..
there is no reason to be shy about what your combo makes on the pump..
T7 / I wont name the Kit,,, p gas, 16 psi 239 hp/ 159 lbs. with meth inject.
could give you more if customer is open to it.
Gus
see.... easy,,
But,, NONE of the discussion was directed to the original posters question..
there is no reason to be shy about what your combo makes on the pump..
T7 / I wont name the Kit,,, p gas, 16 psi 239 hp/ 159 lbs. with meth inject.
could give you more if customer is open to it.
Gus
see.... easy,,
No, not easy...Are those SAE corrected numbers or straight off the dyno? If not you should have provided barometric pressure and intake temps. If you want dyno numbers you had better understand dyno numbers, lest you make a bad decistion using data you don't understand.
I appreciate the fact that you even ask,,
I am not selling a kit nor providing data as an advertisement.
Just answering a straight question using the sample I was given.
Is it all encompassing ? NO
Is it representative of ALL f7 kits? No
Just information to address the actual question.
Check back in the 1994 snowgoer mag, truth in dynoing article I did with Olav.. I may know more than you think about using and extrapolating dyno data..
I have always been against the use of STD corrections too.
Like using the heated air temp of the turbo as the factor for correction,, seems plausible but is woefully off the wall when used.
If the shots were NOT directed towards me then I apologize,,
Gus
But I think pernikm's point was that the info you gave is so unspecified as to be useless. Those numbers could be adjusted numbers where they would make sense to most, or they could be on a dyno at 9000 feet, you do not state that & we can't assume that.
With how high the hp is, I'm guessing that's adjusted, but SHOULD we assume? no.
His only point (what I saw) was that a simple number doesn't answer the question.
Yes, I except that end of the post.
testing was corrected to sae conditions which are sea level.
It really would not matter if the test was performed on the moon, just how it is corrected if,,,,,, corrected ( for lack of a better word ) data is what you are after.
You see, when riding at high altitudes I am of the school that takes observed data only as ( correct answer ) to the question.
You won't see those fiqures at 8000' ( observed ) . your clutching tells you whats coming out of the pto end for power at any riding altitude.
bottom line, more power than you would expect is a good answer but not the correct answer to the mans question.
I hope ALL realize I was not and AM not taking shots at anyone,,,the thread as I stated above is very good just got off target and turned to a physics and thermodynamics discussion.
Gus
testing was corrected to sae conditions which are sea level.
It really would not matter if the test was performed on the moon, just how it is corrected if,,,,,, corrected ( for lack of a better word ) data is what you are after.
You see, when riding at high altitudes I am of the school that takes observed data only as ( correct answer ) to the question.
You won't see those fiqures at 8000' ( observed ) . your clutching tells you whats coming out of the pto end for power at any riding altitude.
bottom line, more power than you would expect is a good answer but not the correct answer to the mans question.
I hope ALL realize I was not and AM not taking shots at anyone,,,the thread as I stated above is very good just got off target and turned to a physics and thermodynamics discussion.
Gus
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OP has spoken, I deleted my posts. Sorry to all I have offended.
I was fine with it pernikm,, sorry the OP ?? got to you.. whoever OP is
I know O.T ,,,,,not op,, but do know opp,, you down whithdat !! ??
gus
And YES,, ALL the wetern riders would benefit from a mobil dynomite with a good pump at the 8000-9000 ft range to help get our collective heads around what being put through the clutchs up there..
OP = original poster
C
CBX
Well-known member
Good point.
That depends on the means of forced induction. At best turbo's are 75% efficient. That would account for most of the reason why HP output isnt double by 2x ATM.
Now if the intake air was compressed externally by other means (for test purposes an didnt use energy from the test engine) or assumed at 100% efficency things would be different.
Great post Kelsey.
D
Dano702
Well-known member
I dont know any #'s but my 8 makes enough power i will never ride another N/A sled again . End of story !
I am looking for Sunoco cash like a crack head with the twitch. I hope to spend most of my year on a race gas M1000 , but when i am on my 800 12 psi will be the slow setting.
At 12 psi the 8 is a really fun sled , and will make any big bore look dumb . IMHO.
Dano that's exactly what I wanted to hear, after my last 2 years I'm ready for a change to a turbo!
D
Dano702
Well-known member
You will never regret it . Go race gas and dont look back . You could always turn it down to slow if you want .
I think the race gas M8 at around 15 psi should be ABOUT 240-260 HP. but I have never seen one on a dyno, there at least I contributed something on topic
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Ditto that, maybe not ANY, but 99.9% of them.
Put the smelly gas in the tank & it'll put a
on your mug!!!
Ditto that, maybe not ANY, but 99.9% of them.
Put the smelly gas in the tank & it'll put a
gotta love that smelly gas, it's just too bad it is so damn expensive
VOHK, your first post was easy for us common folk to understand, and why I come on snowest. Perhaps the best post I've seen in a very long time. Some of you other morons however, make me wish for a Drama filter. I'm new to the turbo world, but the reason I came into it was I spent way to many days in the trailer last year wrenching on a wicked big bore m7, while my buddies were riding. A race gas turbo M8 for this year is ready to go, and the mod m7 gets to stay in the trailer. Power quoted as I was told is 260ish for my sled (Intercooler, full race gas, other mods, and weight loss), depending on elevation and boost settings. All I know is it looks friken fast sitting in the trailer , and if it makes even 200 HP at elevation and I can ride it all year without fail, I'll never go back to a big bore again.
, and if it makes even 200 HP at elevation and I can ride it all year without fail, I'll never go back to a big bore again.
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Those of us who ocassionally ride the flat lands will relate to this since I used to drag race and have been clutching sleds for a long time (yes Im old) you can ALMOST interpolate a horspower by looking at the clutch weight, By that I mean that at sea level where everything is corrected to you know your Hp there . for example a dragon is supposed to make 150 hp (mabe) and the rule of thumb 33% loss at 10,000 feet You roughly have 110hp your seeing,,,, I know this because at sea level I may pull 74 gram arms at sealevel or 600 feet in the Up of michigan,, but at Vail pass only pull like 56-60 grams ,yes I know the helix and spring and gearing combo make alot of difference too,, but roughly speeking,, now I install my turbo on my dragon and clutch it at 10k and guess what?? Im pulling mabe 70-74s at 12psi so how much power do I have ???? Im betting not the 200-250- every one claims more like like 150-175 ,,the sled shure feels like it ,,,I know because I know what it feels like at 600 feet just a week earlier(I have a dragon 800 121 at 600 ft) You can call around and see what weights every one is running at sea level,, I think a turbo is a great high altitude compensator!!LOL thats why I run 12 psi,, at that HP level the motor feels like Im used to in the flat lands 14-16 feels like one of my ported and piped mod sleds in the flats. I had a a Hoopper 3 cylinder cat that made 234Hp at midwest Dyno (cousin to Dyno tech) and I can honestly say that it takes 18Psi++++ on my Dragon to come close to the tug on the bars that thing had , and Im not shure My 2871 garrett will last at those boost pressures I know an AERO wont even go there ,,not to mention my rings, any way this is just my seat of the pants Dyno Talkin cuz every one owns one of those Dynos
thats why I run 12 psi,, at that HP level the motor feels like Im used to in the flat lands 14-16 feels like one of my ported and piped mod sleds in the flats. I had a a Hoopper 3 cylinder cat that made 234Hp at midwest Dyno (cousin to Dyno tech) and I can honestly say that it takes 18Psi++++ on my Dragon to come close to the tug on the bars that thing had , and Im not shure My 2871 garrett will last at those boost pressures I know an AERO wont even go there ,,not to mention my rings, any way this is just my seat of the pants Dyno Talkin cuz every one owns one of those Dynos
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