Dyno Results
#61
Sigh, can't please everyone I guess. I just thought the community would like to see verified dyno charts from two different dynos with two different operators!! with my mods I ran the dynos within 2 days of each other as well with the only thing changing being the octane of the fuel. Didn't realize there would be this much scrutiny even with charts!
That being said, I'm going to politely step out of my own thread. If anyone does have questions, feel free to PM me and I'll be more than happy to help. I just hope that people that are contemplating or have a similar build/tune don't get detracted from some of the naysayers here
That being said, I'm going to politely step out of my own thread. If anyone does have questions, feel free to PM me and I'll be more than happy to help. I just hope that people that are contemplating or have a similar build/tune don't get detracted from some of the naysayers here
Come on guys! Its not like he is making obscene power claims on a Honda forum without dyno charts (oh my honda b16 NA made 400whp and smoked a zr1). He has supplied us with dyno charts and the dyno shows that his 951 is not only beautiful, but a beast as well. Great numbers!
Also are those 18" wheels on your 944 in your avatar photo? Thanks.
#62
Come on guys! Its not like he is making obscene power claims on a Honda forum without dyno charts (oh my honda b16 NA made 400whp and smoked a zr1). He has supplied us with dyno charts and the dyno shows that his 951 is not only beautiful, but a beast as well. Great numbers!
Also are those 18" wheels on your 944 in your avatar photo? Thanks.
Also are those 18" wheels on your 944 in your avatar photo? Thanks.
Yep, those are 18" 997 replicas. They look great but I don't currently have them on my car as they're way too heavy for the track.
#64
#66
Why the hell do you start your runs so high up the revs? Do a 1/4mile run.. dont care about time.. just mph. 400whp at 3Klbs = 120mph trap.. on an average run.. an exceptionally poor run will net a few less mph. So.. weigh car.. tell us altitude/temp and then record it. that is truly all that is needed. Well, and some sticky tires if your running that kind of power.
#67
Not really... and the answer as to why is long and detailed... but the short version is that water and/or meth injection is a band-aid solution to the real problem... fuel quality.
And it's more than the R+M/2 octane rating that dictates how a particular engine will run on a given fuel...
Nothing like burning real race fuel.
TonyG
And it's more than the R+M/2 octane rating that dictates how a particular engine will run on a given fuel...
Nothing like burning real race fuel.
TonyG
#68
Not really... and the answer as to why is long and detailed... but the short version is that water and/or meth injection is a band-aid solution to the real problem... fuel quality.
And it's more than the R+M/2 octane rating that dictates how a particular engine will run on a given fuel...
Nothing like burning real race fuel.
TonyG
And it's more than the R+M/2 octane rating that dictates how a particular engine will run on a given fuel...
Nothing like burning real race fuel.
TonyG
#69
I realize that dyno's, like any other instrument, can have errors. One of the biggest things, that i rarely see posted on dyno sheets is correction factors. Here in Denver that really matters as typical summer factors are 1.25 to 1.30. If that is applied applied to a turbo car it is somewhat misleading.
The NHRA applies half correction to turbo cars which is probably more realistic. However, when I get dyno sheets in Denver, I like to see uncorrected numbers.
If I take the car to a dragstrip, the ET/MPH gives me uncorrected time which should match with the dyno.
Case in point. The Dyno Dynamics vodoo machine "measured" 255rwhp uncorrected for my car. Using a 15% loss, that should be about 294crank hp in Denver. At the dragstip the car posted 103.89mph. On the dragstrip scale with all the crap in the car (fuel, me, spare tire, etc) the car weighed 3290lbs (it needs a diet).
Using the generally accepted formula >>> hp= (trapspeed/234)^3 * weight <<< it shows my car should require 292crank hp to reach that mph.
I have just shown you an instance where a dyno shows the same number as real life within a small window of error. You shouldn't believe all dynos lie.
-Dana
The NHRA applies half correction to turbo cars which is probably more realistic. However, when I get dyno sheets in Denver, I like to see uncorrected numbers.
If I take the car to a dragstrip, the ET/MPH gives me uncorrected time which should match with the dyno.
Case in point. The Dyno Dynamics vodoo machine "measured" 255rwhp uncorrected for my car. Using a 15% loss, that should be about 294crank hp in Denver. At the dragstip the car posted 103.89mph. On the dragstrip scale with all the crap in the car (fuel, me, spare tire, etc) the car weighed 3290lbs (it needs a diet).
Using the generally accepted formula >>> hp= (trapspeed/234)^3 * weight <<< it shows my car should require 292crank hp to reach that mph.
I have just shown you an instance where a dyno shows the same number as real life within a small window of error. You shouldn't believe all dynos lie.
-Dana
#70
^Isn't that based on a lot of other things though Dana? Driver, traction, wheel pressure, suspension, skill whatever....just because you got 102mph. Someone else might have got 110mph or 95mph? Or am I missing something here...?
#71
I realize that dyno's, like any other instrument, can have errors. One of the biggest things, that i rarely see posted on dyno sheets is correction factors. Here in Denver that really matters as typical summer factors are 1.25 to 1.30. If that is applied applied to a turbo car it is somewhat misleading.
The NHRA applies half correction to turbo cars which is probably more realistic. However, when I get dyno sheets in Denver, I like to see uncorrected numbers.
If I take the car to a dragstrip, the ET/MPH gives me uncorrected time which should match with the dyno.
Case in point. The Dyno Dynamics vodoo machine "measured" 255rwhp uncorrected for my car. Using a 15% loss, that should be about 294crank hp in Denver. At the dragstip the car posted 103.89mph. On the dragstrip scale with all the crap in the car (fuel, me, spare tire, etc) the car weighed 3290lbs (it needs a diet).
Using the generally accepted formula >>> hp= (trapspeed/234)^3 * weight <<< it shows my car should require 292crank hp to reach that mph.
I have just shown you an instance where a dyno shows the same number as real life within a small window of error. You shouldn't believe all dynos lie.
-Dana
The NHRA applies half correction to turbo cars which is probably more realistic. However, when I get dyno sheets in Denver, I like to see uncorrected numbers.
If I take the car to a dragstrip, the ET/MPH gives me uncorrected time which should match with the dyno.
Case in point. The Dyno Dynamics vodoo machine "measured" 255rwhp uncorrected for my car. Using a 15% loss, that should be about 294crank hp in Denver. At the dragstip the car posted 103.89mph. On the dragstrip scale with all the crap in the car (fuel, me, spare tire, etc) the car weighed 3290lbs (it needs a diet).
Using the generally accepted formula >>> hp= (trapspeed/234)^3 * weight <<< it shows my car should require 292crank hp to reach that mph.
I have just shown you an instance where a dyno shows the same number as real life within a small window of error. You shouldn't believe all dynos lie.
-Dana
I'm actually at a similar elevation to you as well. My dyno operator says the 413whp number on the Dyno Dynamics was uncorrected. My dyno operator for the dynojet run says it was with an SAE correction whatever that means?
#72
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Trap speed is a pretty good indicator of HP. ET is much more representative of skill, traction, ect.
#73
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That is why their is a discrepancy between the two... The correction number should be something like 1.10 or or so. This means that they multiply your uncorrected HP number by the correction factor to get the corrected hp number.
#74
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Some, but not as much as you might think. You could do a 15sec 1/4mi @100mph, due to spinning and slow shifting. But that same 100mph might get you a 13sec 1/4mi. The difference is how well the car launches and your shifting. But both cases the same HP.