Engine Dyno testing of Renesis
#126
The cat in the RX-8 is quite large, and we doubt it causes much, if any, restriction. But no, if you look at the vid, there isn't a cat.
One thing we might be able to do when we go back with the FI mods, is do a pull with our high-flow cat fitted (as per Wildcards car - pics posted earlier in the s/c thread).
Cheers,
Hymee.
One thing we might be able to do when we go back with the FI mods, is do a pull with our high-flow cat fitted (as per Wildcards car - pics posted earlier in the s/c thread).
Cheers,
Hymee.
#129
Congrats Hymee a man of your words...
https://www.rx8club.com/showthread.p...6&page=1&pp=15
So were do you go from here is 100 hp ++++ gains available
https://www.rx8club.com/showthread.p...6&page=1&pp=15
So were do you go from here is 100 hp ++++ gains available
#130
Originally Posted by Dan 8
Congrats Hymee a man of your words...
https://www.rx8club.com/showthread.p...6&page=1&pp=15
So were do you go from here is 100 hp ++++ gains available
https://www.rx8club.com/showthread.p...6&page=1&pp=15
So were do you go from here is 100 hp ++++ gains available
Stay tuned. More dyno time might be available next week.
Cheers,
Hymee.
#131
never give up
So let me get this straight in my head. What we see here is a dyno like the one Mazda did to publish the power to the consumers, or am I wrong?
Some questions: -This is the most hp tha you can measure, being that there are no restrictions here, wheel loss, ECU, etc., so this is the most we can take from the engine?
- So when someone tunes, the most he can get is the hinted number? Or in that area nevertheless?
Nice work for rx community, thanks.
Some questions: -This is the most hp tha you can measure, being that there are no restrictions here, wheel loss, ECU, etc., so this is the most we can take from the engine?
- So when someone tunes, the most he can get is the hinted number? Or in that area nevertheless?
Nice work for rx community, thanks.
#132
New Member
Chassis dyno is the best dyno. kW at the flywheel. You are true tuner Hymee. Very nice - I am sure you had fun. Keep on the good work.
NO SPECULATION EVERYONE. Japanese have chassis dyno a range of Renesis.
DEPENDS ON YOUR LUCK: It can range from 180ps to 220ps. Yes please stop crying
That is why some people dyno their car at the wheel with mods less kW than someone stock
NO SPECULATION EVERYONE. Japanese have chassis dyno a range of Renesis.
DEPENDS ON YOUR LUCK: It can range from 180ps to 220ps. Yes please stop crying
That is why some people dyno their car at the wheel with mods less kW than someone stock
#133
Originally Posted by takahashi
Chassis dyno is the best dyno. kW at the flywheel. You are true tuner Hymee. Very nice - I am sure you had fun. Keep on the good work.
NO SPECULATION EVERYONE. Japanese have chassis dyno a range of Renesis.
DEPENDS ON YOUR LUCK: It can range from 180ps to 220ps. Yes please stop crying
That is why some people dyno their car at the wheel with mods less kW than someone stock
NO SPECULATION EVERYONE. Japanese have chassis dyno a range of Renesis.
DEPENDS ON YOUR LUCK: It can range from 180ps to 220ps. Yes please stop crying
That is why some people dyno their car at the wheel with mods less kW than someone stock
BTW - I don't deserve all the credit. Grandad deserves a fair whack of it as well.
Cheers,
Hymee.
#134
Originally Posted by peloponisios
So let me get this straight in my head. What we see here is a dyno like the one Mazda did to publish the power to the consumers, or am I wrong?
Some questions: -This is the most hp tha you can measure, being that there are no restrictions here, wheel loss, ECU, etc., so this is the most we can take from the engine?
- So when someone tunes, the most he can get is the hinted number? Or in that area nevertheless?
Nice work for rx community, thanks.
Some questions: -This is the most hp tha you can measure, being that there are no restrictions here, wheel loss, ECU, etc., so this is the most we can take from the engine?
- So when someone tunes, the most he can get is the hinted number? Or in that area nevertheless?
Nice work for rx community, thanks.
Yes - this is the most we can get out of this engine in the "standard form". It is the HP measured at the flywheel, using a standard, unopened motor, the standard throttle body, standard intake runners, standard exhaust manifold, then tuned to make the maximum power from the fuel we used (95 RON as recommended).
But I must stress the point of this excercise is not to discredit Mazda, but rather establish a base for continued testing. Next time we go back to the dyno with FI, we can see exactly how much horsepower different things have achieved. It is about as scientific as we can be, without having the big budget of a big car maker.
Cheers,
Hymee.
PS - I'm surprised a little bit that no one to date has made any comments about the oil cooler...
#136
New Member
Originally Posted by Hymee
Taka-san, this is an engine dyno. A chassis dyno is what you use to measure the power available at the wheels. I.e. you drive the chassis on to the dyno.
BTW - I don't deserve all the credit. Grandad deserves a fair whack of it as well.
Cheers,
Hymee.
BTW - I don't deserve all the credit. Grandad deserves a fair whack of it as well.
Cheers,
Hymee.
What oil cooler The yellow can?
Last edited by takahashi; 05-26-2006 at 06:09 AM.
#137
New Member
I was thinking when I watch the video - Why is only the middle tube is red hot on the extractor but not the other 2? Camera angle?
Also how come the shape of the extractor is different from the other that I saw.... wat do you know about extractor Taka...
Also how come the shape of the extractor is different from the other that I saw.... wat do you know about extractor Taka...
#141
Bigus Rotus
iTrader: (3)
These engines are all hand built - does that play into the variances of the power produced ever so slightly? I doubt it, but it is the only thing that is not repeatable to the same exact standard during production. I wonder what the compression is on your test engine as compared to mine?
#142
Mazda Mole
Join Date: Aug 2003
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Originally Posted by Nemesis8
These engines are all hand built - does that play into the variances of the power produced ever so slightly? I doubt it, but it is the only thing that is not repeatable to the same exact standard during production. I wonder what the compression is on your test engine as compared to mine?
Without knowing what Mazda has for tolerances on components, it is hard to know what kind of effect the tolerance stackup have on the engine output.
#143
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Originally Posted by Hymee
You are the closest so far. Lets be more exact, and say the headers gave a 6.3% increase.
Cheers,
Hymee.
Cheers,
Hymee.
I say 212-218 hp
Using 6% and 6.3%
#144
Bigus Rotus
iTrader: (3)
Yes, I understand that - I work in a manufacturing plant that builds severe duty chopper pumps. Our tolerances are critical in achieving the correct clearances to maintain our ability to chop and hold pressure in the pump. So the key is Mazda's tolerances...
Mark - I want those port extractors
Mark - I want those port extractors
Originally Posted by Magic8
It's hand assembled but the components are mass produced. To my knowledge noone is hand filing or polishing the components for fit, unlike a Ferrari or a Rolls-Royce.
Without knowing what Mazda has for tolerances on components, it is hard to know what kind of effect the tolerance stackup have on the engine output.
Without knowing what Mazda has for tolerances on components, it is hard to know what kind of effect the tolerance stackup have on the engine output.
#147
Originally Posted by Hymee
What you are thinking is pretty much spot on. The manufacturer "may" use a different standard, but I am assured the correction factors used in this setup are within 1 HP of SAE corrections. Perhaps the manufacturers tests were without the generator or any other ancillaries, but without being 100% of the "standard", I'm pretty sure that the advertised figures are supposed to be as "production" as possible.
Yes - this is the most we can get out of this engine in the "standard form". It is the HP measured at the flywheel, using a standard, unopened motor, the standard throttle body, standard intake runners, standard exhaust manifold, then tuned to make the maximum power from the fuel we used (95 RON as recommended).
But I must stress the point of this excercise is not to discredit Mazda, but rather establish a base for continued testing. Next time we go back to the dyno with FI, we can see exactly how much horsepower different things have achieved. It is about as scientific as we can be, without having the big budget of a big car maker.
Cheers,
Hymee.
PS - I'm surprised a little bit that no one to date has made any comments about the oil cooler...
Yes - this is the most we can get out of this engine in the "standard form". It is the HP measured at the flywheel, using a standard, unopened motor, the standard throttle body, standard intake runners, standard exhaust manifold, then tuned to make the maximum power from the fuel we used (95 RON as recommended).
But I must stress the point of this excercise is not to discredit Mazda, but rather establish a base for continued testing. Next time we go back to the dyno with FI, we can see exactly how much horsepower different things have achieved. It is about as scientific as we can be, without having the big budget of a big car maker.
Cheers,
Hymee.
PS - I'm surprised a little bit that no one to date has made any comments about the oil cooler...
In these condition, the high power Renesis is officially homologated at 170 kW (231 hp).
Hope it helps.
I'm very impatient to see what kind of figures you'll get though, Hymee. I trust they will come close to the homologated numbers.
EDIT : I just realised you decided not to publish the numbers. Probably a wise decision.
Cheers,
Fabrice
Last edited by Rasputin; 05-26-2006 at 12:45 PM.
#148
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222hp is exactly 4% less than 231hp....
but 222hp wasnt achieved using stock tune anyways
________
KIDS PAXIL
but 222hp wasnt achieved using stock tune anyways
________
KIDS PAXIL
Last edited by Renesis_8; 09-11-2011 at 08:46 AM.
#149
RX8 and a Truk....
Originally Posted by Renesis_8
222hp is exactly 4% less than 231hp....
but 222hp wasnt achieved using stock tune anyways
but 222hp wasnt achieved using stock tune anyways
Keeps coming back to RB's Renesis dyno fo 216fwhp awhile ago.