blacky83
MR2 Scholar
- Total Posts : 198
- Scores: 16
- Reward points: 1984
- Joined: 2011/08/14 14:50:43
- Status: offline
Re:Rice or nice?
2012/03/21 16:15:03
(permalink)
^^You're better off with a properly tuned collector. Exhaust scavenging will give you power benefits over individual pipes. Also it doesn't hurt to chuck a turbo in there somewhere.
|
TRD2000
MR2 Aficionado
- Total Posts : 565
- Scores: 13
- Reward points: 6022
- Joined: 2011/04/07 19:51:15
- Location: Tassie and St Kilda
- Status: offline
Re:Rice or nice?
2012/03/21 17:17:26
(permalink)
4 pipes... 4 turbos.... muhaha.
little ones lol.
|
Tree
MR2 Deity
- Total Posts : 1334
- Scores: 98
- Reward points: 2970
- Joined: 2011/04/07 19:51:15
- Location: VIC, S.E.
- Status: offline
Re:Rice or nice?
2012/03/21 18:55:59
(permalink)
My mate had dual oval tips, not bad but nothing beats four little quads for moi hehe. I know straight thru mufflers are the way to go for minimum back pressure and max gas velocity but what do you guys like about a larger tri/reverse flow muffler design for a small output engine? According to autospeed it's recommended to avoid reverse flows, but on a small output engine like the gen 2 3SGE, Julian says you can get away with quiet OEM mufflers (and save $$) so long as they have big inlet and outlet diameters and are from high output cars like 160kw+
post edited by Tree - 2012/03/21 19:08:07
|
artymr2
MR2 Deity
- Total Posts : 1105
- Scores: 45
- Reward points: 7867
- Joined: 2011/04/07 19:51:15
- Location: WA
- Status: offline
Re:Rice or nice?
2012/03/22 01:59:22
(permalink)
To get the most from a free-er flowing exhaust, you should really do a retune, which is not possible with the stock ecu AFAIK.
Cheers
Black SW20 GT Turbo T-top 
|
wiz
MR2 Aficionado
- Total Posts : 196
- Scores: 8
- Reward points: 2920
- Joined: 2011/04/07 19:51:15
- Location: Albion Park NSW Australia
- Status: offline
Re:Rice or nice?
2012/03/22 10:55:53
(permalink)
artymr2
To get the most from a free-er flowing exhaust, you should really do a retune, which is not possible with the stock ecu AFAIK.
Cheers
Yeah....that is the problem (if you can call it that) with the stock ECU in an N/A as you are only are only virtually able to adjust the timing. These ECU's are very well designed by Toyota IMO to get the max out of a 2 litre engine. Once you start advancing the timing a little you tend to get pinging especially in the later model SW20's ('94 on) with the higher compression and 125kw ATF. I installed a piggyback powerchip on my '97 N/A many years ago to try and coax a bit more power out of it and ended up getting rid of it coz all it did was confuse the computer and make the car ping on light throttle etc. These chips may work on some cars though especially turbos. 
|
TIPSIDUECE
MR2 Aficionado
- Total Posts : 201
- Scores: 7
- Reward points: 1934
- Joined: 2011/10/01 19:17:40
- Location: victoria
- Status: offline
Re:Rice or nice?
2012/03/27 21:46:49
(permalink)
exhaust fabrications finished except the tips, how do u upload vids here?
Why do people say "grow some balls"? Balls are weak and sensitive if you really wanna get tough, grow a vagina! Those things take a pounding!
|
Tree
MR2 Deity
- Total Posts : 1334
- Scores: 98
- Reward points: 2970
- Joined: 2011/04/07 19:51:15
- Location: VIC, S.E.
- Status: offline
Re:Rice or nice?
2012/03/28 00:42:24
(permalink)
Just post it up on youtube and link it :)
|
Senol
MR2 Scholar
- Total Posts : 1111
- Scores: 21
- Reward points: 2497
- Joined: 2011/04/07 19:51:15
- Location: Brisbane Queensland Australia
- Status: offline
Re:Rice or nice?
2012/03/28 01:02:52
(permalink)
wiz
artymr2
To get the most from a free-er flowing exhaust, you should really do a retune, which is not possible with the stock ecu AFAIK.
Cheers
Yeah....that is the problem (if you can call it that) with the stock ECU in an N/A as you are only are only virtually able to adjust the timing. These ECU's are very well designed by Toyota IMO to get the max out of a 2 litre engine. Once you start advancing the timing a little you tend to get pinging especially in the later model SW20's ('94 on) with the higher compression and 125kw ATF.
I installed a piggyback powerchip on my '97 N/A many years ago to try and coax a bit more power out of it and ended up getting rid of it coz all it did was confuse the computer and make the car ping on light throttle etc. These chips may work on some cars though especially turbos.
Sorry to go a bit off topic but it is interesting that you had pinging. My car on the standard ecu didnt ping at 11.3:1 compression, that's a full one point increase in compression over the later generation sw20's.
|
MRTurbo
SA Moderator
- Total Posts : 2894
- Scores: 81
- Reward points: 4791
- Joined: 2011/04/07 19:51:15
- Location: Adelaide SA Australia
- Status: offline
Re:Rice or nice?
2012/03/28 09:30:31
(permalink)
Engines 'ping' because people often feed them cheap petrol...
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i 
|
Tree
MR2 Deity
- Total Posts : 1334
- Scores: 98
- Reward points: 2970
- Joined: 2011/04/07 19:51:15
- Location: VIC, S.E.
- Status: offline
Re:Rice or nice?
2012/03/28 15:43:41
(permalink)
Hmm that is interesting cos they say production cars are made to run rich...also shouldn't the ECU retard the ignition timing automatically when it starts to knock? I read somewhere (Toyota source) the ECU runs as lean as possible until it knocks then retards until no more knock.
Also instead of a retune, can't you just reset the ECU if it's small changes to the air fuel ratio? ie for intake/exhaust mods?
|
MRTurbo
SA Moderator
- Total Posts : 2894
- Scores: 81
- Reward points: 4791
- Joined: 2011/04/07 19:51:15
- Location: Adelaide SA Australia
- Status: offline
Re:Rice or nice?
2012/03/28 15:54:11
(permalink)
If it has a knock sensor then yes.
I don't think they run as lean as possible, if that were the case people wouldn't be mucking around inside the AFM to lean them out (not recommended). Toyotas seems to be tuned rich and in the case of turbos, excessively so.
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
|
SW20_3sgte
MR2 Scholar
- Total Posts : 1337
- Scores: 14
- Reward points: 4539
- Joined: 2011/04/07 19:51:15
- Location: Rowville, Victoria
- Status: offline
Re:Rice or nice?
2012/03/28 16:00:13
(permalink)
Tree
Hmm that is interesting cos they say production cars are made to run rich...also shouldn't the ECU retard the ignition timing automatically when it starts to knock? I read somewhere (Toyota source) the ECU runs as lean as possible until it knocks then retards until no more knock.
Also instead of a retune, can't you just reset the ECU if it's small changes to the air fuel ratio? ie for intake/exhaust mods?
From the many dyno sheets i've seen in the past of stock Toyotas they have always been severely rich throughout most of the rpm. I'm not so sure the ECU can run as lean as possible safely without a Wideband, it does take in measurements from the o2 sensor but under wide open throttle the car takes in its predefined tune.
1998 Toyota Caldina GTT Manual
|
Tree
MR2 Deity
- Total Posts : 1334
- Scores: 98
- Reward points: 2970
- Joined: 2011/04/07 19:51:15
- Location: VIC, S.E.
- Status: offline
Re:Rice or nice?
2012/03/28 16:32:26
(permalink)
Hmm this will sound like personalised intuitive retarded logic but if it runs so rich, can we use lower octane fuel? Aus delivered N/A specify 95 in the manual but my carbon deposited JDM N/A doesn't need 98 does it? Compression numbers range from 185 to 195 psi
Also have octane 100 with 10% ethanol around my area :P
|
MRTurbo
SA Moderator
- Total Posts : 2894
- Scores: 81
- Reward points: 4791
- Joined: 2011/04/07 19:51:15
- Location: Adelaide SA Australia
- Status: offline
Re:Rice or nice?
2012/03/28 17:02:11
(permalink)
an N/A should be able run even on 91 shouldn't it? doesn't it have a knock sensor? timing plays a big part too.
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
|
Tree
MR2 Deity
- Total Posts : 1334
- Scores: 98
- Reward points: 2970
- Joined: 2011/04/07 19:51:15
- Location: VIC, S.E.
- Status: offline
Re:Rice or nice?
2012/03/28 18:32:41
(permalink)
Yeh the previous owner ran 91  I suspect the ECU knocked back the timing a bit. Can't remember how it felt back then. Just installed a new knock sensor (2nd hand, tested by R&T) and new oxygen sensor (old one was original from 1990!) and it's prob just me but it feels slightly stronger. Timing should be base at 10 deg assuming the dizzy hasn't been adjusted since May last year Bit off topic but just got home and noticed that sometimes a bit of smoke coming out the exhaust while driving, nothing while idling. I think it's just carbon. Electrodes are pitch black and I only installed them October last year :( hopefully the new O2 sensor corrects the AF ratio and carbon gets "burnt" off...
|