Engine Dyno testing of Renesis
06-13-2006, 11:38 PM
#228
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if mazda did knowingly exaggerate it that much, thats horrible... but honestly, does it really matter?
If someone buys a car stricly based on paper figures and not the drive, screw em.
-hS
If someone buys a car stricly based on paper figures and not the drive, screw em.
-hS
06-14-2006, 02:02 AM
#229
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I absolutely agree. Anyone buying cars just for paper figures is missing the whole point.
However, the Renesis real output debate never ceases to amaze.
JDM models are supposed to actually have 250 Ps at the crank. Emissions issues don't seem to apply there. BUT the car, even in JDM PCM tune, is just putting out what we've seen all around in our respective markets (USA and Europe).
Don't you just love them rotaries?
I really do!
However, the Renesis real output debate never ceases to amaze.
JDM models are supposed to actually have 250 Ps at the crank. Emissions issues don't seem to apply there. BUT the car, even in JDM PCM tune, is just putting out what we've seen all around in our respective markets (USA and Europe).
Don't you just love them rotaries?
I really do!
06-18-2006, 06:48 PM
#232
Originally Posted by rotary crazy
what I really would love to see its someone that gets the maximun hp from bolt ons and ecu upgrades
06-19-2006, 12:38 AM
#235
Our tests of engine performance have been done on an engine dyno, so the transmission doesn't come into it at all. Although out numbers where a fair bit less than what Mazda said, it was not our intention to prove or disprove those claims. The testing we did is to form the baseline for our on-going performance development of the engine, including forced induction.
Cheers,
Hymee.
Cheers,
Hymee.
06-19-2006, 01:51 AM
#236
Originally Posted by TeamRX8
Mazda's engine power claim is actually reasonable, the transmission is really that sh-tty, that's where most of the engine power is lost, it their dirty little secret ...
Originally Posted by Marlew
The trans is straight out of China and is sourced also for the Nissan S15 Silvia ( 200 SX ) and the lexus is200
No where as good as the S6 RX7 and definitly not as strong
No where as good as the S6 RX7 and definitly not as strong
This is the same tranny as the Miata, which only seems to suffer a 12% - 15% driveline loss in that car.
Must be the pistons...
06-19-2006, 08:36 AM
#237
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If we accept that the engine is making 210~215 fwhp when it's actually in the car (Hymee's is making 222, but under the best possible conditions, right?), then 12%~15% drivetrain loss would give us about 180 rwhp. Which is close to what most people see on a dyno, right?
06-20-2006, 07:33 AM
#240
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Originally Posted by BaronVonBigmeat
If we accept that the engine is making 210~215 fwhp when it's actually in the car
But later on, you do say RWHP, so I guess it's okay.
06-20-2006, 09:37 AM
#242
how many people do you know who tested before and after rather than make assumptions?
I know at least one knowledgable source that claims a 70 hp loss in the RX-8 trans, the power loss is one of the reasons they don't last long when pushed hard; the internls can't take input/output stress differential. An RX-8 doesn't make any more torque than a Miata, yet eats transmissions at several hundred percent higher rate than it does
if the drivetrain doesn't account for the loss, then the only other dirty lil'secret is they're still lying about the power output ... which is hard to do given the new independent-verification standard ...
as for the dyno testing, the assumption that the Motec is programmed better than OE is only another assumption, not a fact
I know at least one knowledgable source that claims a 70 hp loss in the RX-8 trans, the power loss is one of the reasons they don't last long when pushed hard; the internls can't take input/output stress differential. An RX-8 doesn't make any more torque than a Miata, yet eats transmissions at several hundred percent higher rate than it does
if the drivetrain doesn't account for the loss, then the only other dirty lil'secret is they're still lying about the power output ... which is hard to do given the new independent-verification standard ...
as for the dyno testing, the assumption that the Motec is programmed better than OE is only another assumption, not a fact
06-20-2006, 09:43 AM
#243
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Originally Posted by TeamRX8
as for the dyno testing, the assumption that the Motec is programmed better than OE is only another assumption, not a fact
06-20-2006, 10:09 AM
#244
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Originally Posted by TeamRX8
I know at least one knowledgable source that claims a 70 hp loss in the RX-8 trans, the power loss is one of the reasons they don't last long when pushed hard; the internls can't take input/output stress differential
06-20-2006, 12:10 PM
#246
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The tranny casing says the same name as the transmissions that are used in the S2k, I think the manufacturer is Astin or something like that. You don't hear too many stories of S2k cars having alot of tranny problems and power lose, I don't think the tranny is the problem.
06-20-2006, 12:19 PM
#247
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Originally Posted by TeamRX8
if the drivetrain doesn't account for the loss, then the only other dirty lil'secret is they're still lying about the power output ...
06-20-2006, 12:52 PM
#249
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its not just the tranny. that rear dif sucks quite a few horse. as well as the stock flywheel. where did 70 hp come from. the car dynos at 185 -190. thats 40-45. or 21% using 185 and 232(current advertised number) nemesis8 runs 200rwhp with a flywheel change along with several other people. call the flywheel a 1owhp benifit and now you are only talking a 30ish hp loss for the tranny and rear dif etc. is that out of the realm of physics possibilities? everyone knows how hot the tranny is from the cup warmers
06-20-2006, 12:54 PM
#250
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dont start with the 250. htey sold the car with 247 down to 238 which = 232 under the new standard. the tested number that hymee got is within the legal allowed variance.