sp20 dyno charts/graph - Page 2

twilightprotege · 05-11-2007, 10:01 PM

exactly - and you make the most valuable point about why i say torque is for pulling caravans and power is all that matters.

power in your power band is all that matters. you want absolutely maximum power between redline and the lowest rpm point after you change gears. for my sp20 with a 7000rpm limit, the worst i drop to is from 1st to 2nd - or 3899rpm. basically in the last graph between 70kph and 135kph. mind you 1st to 2nd is the worst, the 2-3 only drops to 4978rpm, 3-4 to 5183rpm and 4-5 5740rpm.

so my point being is that i want maximum power in my gear change rpm areas. once you're in that area, and you want to go fast, there's no need for low down torque. as i've said to a lot of people. my car even at 2000rpm is putting out more power than stock. feels gutless compared to the high end, but even if it was gutless, i'm still putting out more power than an highundie excel hos and they drive around just fine.

SIlversp20 · 11-11-2007, 03:18 AM

Quote:

Originally Posted by twilightprotege

but even if it was gutless, i'm still putting out more power than an highundie excel hos and they drive around just fine.

lol i hate those guys think they high and mighty hahah lol

even funnier is that my poorly tuned sp20 has better response with 3 people in it than a vs 6 cyl commodore

hahaha lol was very funny. sorry off topic

btw will a stand alone ecu be better for the car overall or just be a waste of money and time?

cheers matt

twilightprotege · 11-11-2007, 02:34 PM

well let's just say that as soon as i went to a microtech, i gained power everywhere, was able to increase my rev limit and (essentially) dropped 0.4 seconds off my 1/4 mile time - all while increasing my fuel economy! not to mention saving my engine as well (with my mods i was running rather lean under 4000rpm)

chicaboo · 11-11-2007, 05:49 PM

Quote:

Originally Posted by twilightprotege

not to mention saving my engine as well (with my mods i was running rather lean under 4000rpm)

Wasn't the lean issue also partly due to Mazda's closed loop fuel maps being setup more for economy? Or were the cams outside the stock ECU's tolerances (or combination thereof)?

Gav.

twilightprotege · 11-11-2007, 10:10 PM

it'd mainly be the cams that threw it all off, but still i'm getting better fuel economy now than ever before, mainly due to FAR better above 4000rpm maps

Sleepy Gonzalez · 12-11-2007, 08:45 AM

Assuming your'e talking about high load above 4,000rpm, don't you mean OPEN loop? That's about where mine used to change. Now I've set it to go open loop above 50% throttle position.

twilightprotege · 12-11-2007, 09:10 AM

nah, was extremely lean under no load and low rpm conditions (probably above 17:1), extremely rich under high load and high rpm conditions (down in the 10's). you are still in closed loop with the BJ and stock ems until about 4000rpm no matter what throttle position you have.

the main reason why they go to open loop after that is that the sensors and ems cant read everything fast enough, so it just goes off the air coming through the MAF

Sleepy Gonzalez · 12-11-2007, 09:55 AM

Ok, that makes more sense. I thought you were talking about high load/rpm.

As for the no load, the PCM cuts fuel at no load (0% TPS) above a certain rpm and starts again below a lower rpm (Well, my 1.8 did, anyway). I can't remember what it was stock, something like 2,400/1,600. Or am I misreading the post again.

Maybe this is a bit off topic, but may still help new tuners understand what their PCM is doing.

SIlversp20 · 12-11-2007, 01:34 PM

well its all new to me i never worried bout loads and fuel maps before now. hoping that with more knowledge of it all i can get beter power and/or economy.

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05-11-2007, 10:01 PM	#21
twilightprotege Driving a faster car now! Join Date: Oct 2003 Location: Work, always at bloody work... Car: Lotus ....... . Posts: 5,217 View Photos By: twilightprotege	exactly - and you make the most valuable point about why i say torque is for pulling caravans and power is all that matters. power in your power band is all that matters. you want absolutely maximum power between redline and the lowest rpm point after you change gears. for my sp20 with a 7000rpm limit, the worst i drop to is from 1st to 2nd - or 3899rpm. basically in the last graph between 70kph and 135kph. mind you 1st to 2nd is the worst, the 2-3 only drops to 4978rpm, 3-4 to 5183rpm and 4-5 5740rpm. so my point being is that i want maximum power in my gear change rpm areas. once you're in that area, and you want to go fast, there's no need for low down torque. as i've said to a lot of people. my car even at 2000rpm is putting out more power than stock. feels gutless compared to the high end, but even if it was gutless, i'm still putting out more power than an highundie excel hos and they drive around just fine.

11-11-2007, 02:34 PM	#23
twilightprotege Driving a faster car now! Join Date: Oct 2003 Location: Work, always at bloody work... Car: Lotus ....... . Posts: 5,217 View Photos By: twilightprotege	well let's just say that as soon as i went to a microtech, i gained power everywhere, was able to increase my rev limit and (essentially) dropped 0.4 seconds off my 1/4 mile time - all while increasing my fuel economy! not to mention saving my engine as well (with my mods i was running rather lean under 4000rpm)

11-11-2007, 10:10 PM	#25
twilightprotege Driving a faster car now! Join Date: Oct 2003 Location: Work, always at bloody work... Car: Lotus ....... . Posts: 5,217 View Photos By: twilightprotege	it'd mainly be the cams that threw it all off, but still i'm getting better fuel economy now than ever before, mainly due to FAR better above 4000rpm maps

12-11-2007, 08:45 AM	#26
Sleepy Gonzalez AstinaGT Regular Join Date: Aug 2006 Location: Australia Car: 2002 Mazda 323 Astina 2.5 V6 manual Posts: 324 View Photos By: Sleepy Gonzalez	Assuming your'e talking about high load above 4,000rpm, don't you mean OPEN loop? That's about where mine used to change. Now I've set it to go open loop above 50% throttle position.

12-11-2007, 09:10 AM	#27
twilightprotege Driving a faster car now! Join Date: Oct 2003 Location: Work, always at bloody work... Car: Lotus ....... . Posts: 5,217 View Photos By: twilightprotege	nah, was extremely lean under no load and low rpm conditions (probably above 17:1), extremely rich under high load and high rpm conditions (down in the 10's). you are still in closed loop with the BJ and stock ems until about 4000rpm no matter what throttle position you have. the main reason why they go to open loop after that is that the sensors and ems cant read everything fast enough, so it just goes off the air coming through the MAF

12-11-2007, 09:55 AM	#28
Sleepy Gonzalez AstinaGT Regular Join Date: Aug 2006 Location: Australia Car: 2002 Mazda 323 Astina 2.5 V6 manual Posts: 324 View Photos By: Sleepy Gonzalez	Ok, that makes more sense. I thought you were talking about high load/rpm. As for the no load, the PCM cuts fuel at no load (0% TPS) above a certain rpm and starts again below a lower rpm (Well, my 1.8 did, anyway). I can't remember what it was stock, something like 2,400/1,600. Or am I misreading the post again. Maybe this is a bit off topic, but may still help new tuners understand what their PCM is doing.

12-11-2007, 01:34 PM	#29
SIlversp20 Junior Member Join Date: Apr 2007 Location: brisbane, North Lakes Car: 2002 BJII sp20 Posts: 170 View Photos By: SIlversp20	well its all new to me i never worried bout loads and fuel maps before now. hoping that with more knowledge of it all i can get beter power and/or economy.