Greddy Turbo Installed - Details Inside!!!!
01-21-2005, 08:11 PM
#952
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so I take it the you did both 3rd and 4th gear pulls. Philodox hit 240rwhp on one of his 4th gear pulls. How many minutes did you take between runs to have the engine cool? Also, was there a fan blowing on the engine? If so, was it a small fan or some big jet fan like the one dinan has?
01-21-2005, 08:13 PM
#953
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Originally Posted by Kooldino
Not sure you'd gain much at such a low PSI.
Dunno what setup Jeff is running, but I'd guess around 240whp for Jon.
Dunno what setup Jeff is running, but I'd guess around 240whp for Jon.
01-21-2005, 08:15 PM
#954
Rangers Lead The Way!
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Originally Posted by blksf8
so I take it the you did both 3rd and 4th gear pulls. Philodox hit 240rwhp on one of his 4th gear pulls. How many minutes did you take between runs to have the engine cool? Also, was there a fan blowing on the engine? If so, was it a small fan or some big jet fan like the one dinan has?
I have to go out for a little bit guys.. be back in a few hours.. hopefuly Jeff can field a few questions while I'm out
01-21-2005, 08:18 PM
#955
Let's see how the math works. note my prior calc of the density ratio of 1.388. Or 1.388 times the base. So Jon says he had 174 hp before so 1.388 X 174=241.5
This isn't the final word but it seems to work.
It also shows that guessing by pressure does not work and that was the lead argument.
This isn't the final word but it seems to work.
It also shows that guessing by pressure does not work and that was the lead argument.
Last edited by Richard Paul; 01-21-2005 at 08:23 PM.
01-21-2005, 08:18 PM
#956
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Okay, I took the first dyno, estimated the hp numbers to about the nearest 5, used 93.3 mph in 3rd gear at 9000 rpm, and this is what I got.
I also assumed 5252 was the torque/hp factor. Do I remember correctly?
Source for 93.3 mph:
https://www.rx8club.com/showthread.p...onomy+gear+rpm
Enjoy!
~ Matt
*** EDIT *** I took a closer look at the 93.3 mph post and I think it isn't right. Let me know the real number and I'll update the spreadsheet.
*** EDIT #2 *** I tried searching, but couldn't find the right number. Now it is time for me to go home, so someone else will have to finish it. Still, the numbers look reasonable.
I also assumed 5252 was the torque/hp factor. Do I remember correctly?
Source for 93.3 mph:
https://www.rx8club.com/showthread.p...onomy+gear+rpm
Enjoy!
~ Matt
*** EDIT *** I took a closer look at the 93.3 mph post and I think it isn't right. Let me know the real number and I'll update the spreadsheet.
*** EDIT #2 *** I tried searching, but couldn't find the right number. Now it is time for me to go home, so someone else will have to finish it. Still, the numbers look reasonable.
Last edited by Vaillant; 01-21-2005 at 08:35 PM.
01-21-2005, 08:20 PM
#957
Originally Posted by blksf8
so I take it the you did both 3rd and 4th gear pulls. Philodox hit 240rwhp on one of his 4th gear pulls. How many minutes did you take between runs to have the engine cool? Also, was there a fan blowing on the engine? If so, was it a small fan or some big jet fan like the one dinan has?
I never did a run in 4th. In Jon's case, it netted a slightly higher power figure.
I spent most of my time (all of it, actually) just tuning. I didn't look at the peak HP numbers until I started to get the A/F right.
01-21-2005, 08:35 PM
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^^^I would trust that they are making at least 225 and 240rwhp. If there are issues w/ the DSC kicking in to cut the gas (since front wheels are stationary and the rear wheels are going at 10+ mph faster), then they are probably really making more than what the dyno reads.
01-21-2005, 08:37 PM
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Originally Posted by RX-Nut
Interesting..
Do you folks trust the dynos numbers even with its inability to read RPMs and the RX-8's history of poor dyno run results?
Do you folks trust the dynos numbers even with its inability to read RPMs and the RX-8's history of poor dyno run results?
01-21-2005, 08:38 PM
#963
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Originally Posted by blksf8
^^^I would trust that they are making at least 225 and 240rwhp. If there are issues w/ the DSC kicking in to cut the gas (since front wheels are stationary and the rear wheels are going at 10+ mph faster), then they are probably really making more than what the dyno reads.
Way to go guys.
Now if it can be tuned to remove the popping richness and possibly even result in more 'oomph'........ hhmm
01-21-2005, 08:58 PM
#964
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is it cutting gas or adding gas to be fast and rich?
Since he has the A/F ratio on the graph, if your near your target A/F ratios of 12 to 1 or whatever you're shooting for and you make 225 or 240...then that is what your car makes to the wheels. No dyno crying or making excuses about it. If you tune for 12 to 1 and your dead on it, you can't blame it on the stock ECU and the DSC or try and say you'd be making more if isn't wasn't for this or that kicking in.
with the greddy kit, can you adjust timing any?
Tim
Since he has the A/F ratio on the graph, if your near your target A/F ratios of 12 to 1 or whatever you're shooting for and you make 225 or 240...then that is what your car makes to the wheels. No dyno crying or making excuses about it. If you tune for 12 to 1 and your dead on it, you can't blame it on the stock ECU and the DSC or try and say you'd be making more if isn't wasn't for this or that kicking in.
with the greddy kit, can you adjust timing any?
Tim
Last edited by Tim Benton; 01-21-2005 at 09:04 PM.
01-21-2005, 09:16 PM
#965
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^^^relax guy. no crying by anyone on these dyno results. Philodox got 60+ horses to the wheels from his Greddy Kit. Maybe the DSC kicks in and he could be making a little more if it doesn't...maybe not. Nobody is complaining at the results. take a pill man.
01-21-2005, 09:25 PM
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Philodox baselined at 174rwhp or so. most dead stock 8s will baseline at around 169 rwhp. Of course there are some stock 8s that will dyno higher or lower.
01-21-2005, 09:27 PM
#969
No DSC. No limp mode.
I ran the CanScan as we dyno'ed and there was nothing odd about the ignition timing or throttle.
We did NOT pull the rear wheel sensors.
The myth about dynoing the the RX-8 is busted.
There are only three ways the RX-8 could do anything like a limp mode:
1) Pull throttle
2) Pull ignition timing
3) Add a LOT of fuel (though, really, that wouldn't do much but make the car run like crap)
After 16 consecutive dyno runs - the last 11 without turning off the ignition at any point - nothing like the above ever happened.
I ran the CanScan as we dyno'ed and there was nothing odd about the ignition timing or throttle.
We did NOT pull the rear wheel sensors.
The myth about dynoing the the RX-8 is busted.
There are only three ways the RX-8 could do anything like a limp mode:
1) Pull throttle
2) Pull ignition timing
3) Add a LOT of fuel (though, really, that wouldn't do much but make the car run like crap)
After 16 consecutive dyno runs - the last 11 without turning off the ignition at any point - nothing like the above ever happened.
01-21-2005, 09:40 PM
#970
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This is for sure...the 8 will only get more toy's built for it with time, the ECU will be figured out, turbo's/sc will get better, add on's will get better, and our car will become a near perfect sports car!!!
01-21-2005, 09:46 PM
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65HP is great, but and I hate to say this...it appears that either the rotary is hard or does not dyno right, 27% loss (Flywheel hp to whp) is normal/standard for a rotary, or our 8's make less than the 238HP Mazda tells us.
Not to nock our great car...I'm just saying, but does anyone know what loss the RX7 rotary had...or what whp it made? I just wonder about that heavy 27% loss....
Not to nock our great car...I'm just saying, but does anyone know what loss the RX7 rotary had...or what whp it made? I just wonder about that heavy 27% loss....
01-21-2005, 09:59 PM
#974
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Originally Posted by rx8wannahave
65HP is great, but and I hate to say this...it appears that either the rotary is hard or does not dyno right, 27% loss (Flywheel hp to whp) is normal/standard for a rotary, or our 8's make less than the 238HP Mazda tells us.
Not to nock our great car...I'm just saying, but does anyone know what loss the RX7 rotary had...or what whp it made? I just wonder about that heavy 27% loss....
Not to nock our great car...I'm just saying, but does anyone know what loss the RX7 rotary had...or what whp it made? I just wonder about that heavy 27% loss....
