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| Fuel In Jap Imports | |
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| Tweet Topic Started: Aug 19 2008, 06:44 PM (452 Views) | |
| myblackwrx | Aug 19 2008, 07:42 PM Post #26 |
Doesn't have a home to go to!
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Japanese fuel ratings are and have been very similar to ours for a long time most pumps in Japan are SUL (97 RON). The myth about needing to run 100/102 RON is bollocks as very few few petrol stations actually have this although i would expect the latest generation of performance JDM cars to use 100/102. Alwrx you've got a 92 wrx i would stop wasting your money on octane booster as the early ecus will only advance the ignition so far and that won't be above 99 ron (unless you have a remappable ecu). 1996/1997 seems to have been the start of avaliability of higher octane fuel in Japan although trying to get a definitive date is nigh on impossible. Tescos fuel is not Esso but refined by Greenergy (Esso may supply the fuel but they don't refine it) so using supermarket SUL is perfectly fine 97+ (this argument about supermarket fuel being poorer pisses me off) Any hoo back to TRDCelicas concern 95RON should be fine for your car but to get a bit more pep out of it i would use 97 ron (as the price differance is very small) |
| [GK-customfield]Paul[customfield-GK] | |
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| alwrx | Aug 19 2008, 08:01 PM Post #27 |
Sticking around
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have already cheers got polarperformance chip and running97 all is good in the world of wrx. and was warned off tesco/esso through triton.. what are your views on it???????? .. coz it is cheaper.. would be easyer for me |
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| dc2millz | Aug 19 2008, 08:09 PM Post #28 |
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Strictly Honda
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someone knows there shit !
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![]() VTEC SHOULD BE BANNED ITS HIGHLY ADDICTIVE | |
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| myblackwrx | Aug 19 2008, 08:23 PM Post #29 |
Doesn't have a home to go to!
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I run mine on Tescos and have no problems with it at all BUT V power allows more advance when remapping so is technically a better fuel but if you have a chip to run 97 then any 97 ron fuel will be fine.I've run mine on Total Excellium (great name) and blasted back from Egham to Poole at naughty speeds and didn't miss a beat. The only fuel to avoid is BP Ultimate (and this comes from tuners of imprezas) it might be fine for other cars bjust not imprezas. dc2millz when i was in Japan i just asked some of the people i saw with some fast cars (19 yo with an S15 fully kitted and full of electronics and worked a s a garage attendant ) and he was quite helpful.I got fed up of spending £3 a bottle of booster every tank and the perpetual myth of JDM cars need 100 octane. |
| [GK-customfield]Paul[customfield-GK] | |
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| LegacyTurbo | Aug 19 2008, 08:36 PM Post #30 |
y0
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i near on always use ESSO sul, and my leggy was fine on it. and even though its a UK car it still specifies on the fuel cap 97RON min. Maybe triton only reccomend v-power because they map too close to the limit? just an idea
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[GK-customfield]Lewis[customfield-GK] Starlet GT 1.3 forged engine, tdo4 turbo @ 1.25bar = 252bhp = SOLD ![]() EDIT: Charade GTxx 993cc three cylinder turbo, 173bhp @ 1.4bar (should hit 200bhp with a larger throttle body, removing stupid high lift cams and a bit more boost) | |
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| myblackwrx | Aug 19 2008, 08:41 PM Post #31 |
Doesn't have a home to go to!
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Perhaps your right. Prodrive for their PPP on classics stated 97 ron as the map on the PPP ecu is basically the same map as the 7k ecu from STI2 yet was quoted as less power |
| [GK-customfield]Paul[customfield-GK] | |
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| alwrx | Aug 19 2008, 08:44 PM Post #32 |
Sticking around
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nice1 a hive of info, cleared up everything. cheers... take it all this goes for the galnza v starlet?????? |
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| myblackwrx | Aug 19 2008, 08:50 PM Post #33 |
Doesn't have a home to go to!
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Glanzas were made between 96-99 so this is when they were introducing the higher octane fuel so 97 would be the minimum but i would suggest speaking to people who run them. |
| [GK-customfield]Paul[customfield-GK] | |
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| RA Jay | Aug 19 2008, 09:01 PM Post #34 |
4 Have Gone But Never Forgotten.
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Sod all wrong with Tescos 99 ive run all but one of my 4 scoobs on Tesco 99. I only run the STI on Vpower because thats what it was mapped for. I put BP ultimate in my Last RA and it ran like a biatch for days! |
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1995 WRX - 318bhp/300ftlb - SOLD - 2005 2001 WRX Bugeye - 235bhp/230ftlb - SOLD - 2007 1996 WRX Type RA - 282bhp/285ftlb - SOLD - 2008 1997 STI Type RA - 350bhp/320ftlb - SOLD - 2009 1991 Nissan Pulsar GTiR - 286bhp/280ftlb - SOLD - 2009 | |
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| nakamura | Aug 19 2008, 10:14 PM Post #35 |
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Tescos is fine. Its only when you are running serious power, say over 500ps and advance the ignition a long way its not enough. |
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| TRDcelica | Aug 19 2008, 11:46 PM Post #36 |
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Bringing home the bacon has never been so fun!!!
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A wealth of knowledge here!!!
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"Not putting miles on your MR2 is like not having sex with your girl friend so she'll be more desirable to her next boy friend." - From Sypderchat "V-tec - its like watching lost. You think its going to be great but in the end nothing really happens." - Cisco <a href="http://www.chrisnewnham.co.uk"><img src="http://chrisnewnham.co.uk/wp-content/themes/lcp_blu_wp3/images/djcc-avatar/1.jpg" width="383" height="104"></a><a href="http://www.facebook.com/NarlyDude"><img src="http://chrisnewnham.co.uk/wp-content/themes/lcp_blu_wp3/images/djcc-avatar/2.jpg" width="42" height="104"></a><a href="http://uk.linkedin.com/in/chrisnewnham"><img src="http://chrisnewnham.co.uk/wp-content/themes/lcp_blu_wp3/images/djcc-avatar/3.jpg" width="39" height="104"></a><a href="http://twitter.com/chrisnewnham"><img src="http://chrisnewnham.co.uk/wp-content/themes/lcp_blu_wp3/images/djcc-avatar/4.jpg" width="41" height="104"></a> | |
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| sammi | Aug 19 2008, 11:57 PM Post #37 |
Doesn't have a home to go to!
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i have always used super unleaded .. even in my nova 10 years ago if i didnt it pinked and goed real bad ! i have used optimax when it was first avalible to the now v power and i swear by it ! my prelude was ok on tesco s when it was 99 but i never felt that comfy using it. now its super is back to 97 i wouldnt use it. . . not after i put it in as we were on a trip to norfolk and it was the nearest petrol station. my car was lumpy as hell, was noticibly pants at pulling away and missed alot at about 5 and a half k at 80 ish mph ! maybe its because my car is used to v power.. i dont know but i do know i wont use anything else
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| [GK-customfield]sammi [customfield-GK] | |
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| Julian | Aug 20 2008, 12:07 AM Post #38 |
Doesn't have a home to go to!
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Depends massively on the type of car tbh. I run my import CRX on regular and its fine. Modern ECU's should be able to cope with slightly inferior fuel anyway. Will probably loose you some power but should be safe. |
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| theinfamous | Aug 20 2008, 12:24 AM Post #39 |
You Can't Touch This
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Ive tried both fuel types in my GTST......Regular and Super but I cant say Ive noticed any difference with the Super!!! <_< I havnt tried V-Power...... |
![]() If You Want More Inches - Stroke It!!! | |
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| myblackwrx | Aug 20 2008, 08:39 AM Post #40 |
Doesn't have a home to go to!
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The CRX stopped production well before the introduction of the better octane SUL so should run fine on unleaded and unless the ecu can advance siginificantly you would be wasting your money putting in 99 RON fuel |
| [GK-customfield]Paul[customfield-GK] | |
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| MR2TURRBO | Aug 20 2008, 11:03 AM Post #41 |
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Unregistered
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It will only make a different if the car needs the super unleaded due to the compression ratio and ignition timing setup. Turbo'd cars is a whole other situation. The Ron number should be thought of as the temperature and rate at which that fuel burns. A Higher octane number means the fuel is more resiliant to combustion though temperature ignition and burns at a slower rate. If your import car is set with more ignition advance than the uk car and you put the uk 95 fuel in, with the lots of advance and a high compression ratio, you can get detonation Bad news!! your pistons wont thank you :). The compression ratio is the ratio of the amount of fuel/air in the cylinder and how much that is compressed down to. So with a 12:1 ratio, there are 12 "units" compressed down to the size of one "unit" when the piston comes up. As this is compressed, it heats up, if you compress it too much with a unresiliant fuel, it can self detonate. :(. If your car doesnt detonate on 95 (its sounds like loose bolts in your cylinders when you accelerate hard is what I describe it as) there wont be any difference in performance at all if you put super unleaded in, unless you have a very clever ECU that advances the ignition more. Almost all of our cars have "knock sensors" that detect the detonation and retard the timing to protect your engine. So you can run even the crappest fuels in it. Obviously you wont make the most power like this. Turbo cars have lower compression ratio's to start with, so when you add on the increased cylinder efficiency with the forced induction it will equal out to that of a N/a car or higher, if the cars ecu detects detonation, it will back the boost right off and retard the timing. This is a finer balance, so if it doesnt feel right on lower octane it probably isnt. The imports need higher octane. I tried my old tubby on normal 95 and it kicked the ecu into safe mode straight away. As for misfires and rough running, I notice this more when I change to a supermarket fuel from a shell fuel. Or any brand really, My belief is that the ecu has "learned" how much of the first fuel the engine needs and it has to relearn when you change the brand. Im not too keen on tesco fuel as I hear they add ethanol to their fuels, not only do you need more of this fuel to keep your engine at the same fuel ratio, increasing your fuel consumption, I think that they use this to increase there octane rating. ethanol has a much higher resistance to burn. Right essay over hah. |
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| Julian | Aug 20 2008, 11:04 AM Post #42 |
Doesn't have a home to go to!
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Nope, no knock sensor and can't really advance / retard enough to make a difference. SiR's had a knock sensor though. Think 5th gear did a fairly conclusive test on this.... [dohtml]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/0QGCYLwTCGI&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><embed src="http://www.youtube.com/v/0QGCYLwTCGI&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>[/dohtml] |
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| MR2TURRBO | Aug 20 2008, 11:26 AM Post #43 |
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Unregistered
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Well we had an old nissan sunny that burned more oil than fuel, It used to knock when it was burning oil. We checked the timing before and after it had detected the knock and it had changed a good 10 degrees. It all depends on your car though. |
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| MR2TURRBO | Aug 20 2008, 11:33 AM Post #44 |
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Unregistered
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Well I think that proves if your engine doesnt need it/ isnt setup to have the higher octane, it will make no difference at all. |
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| Benny ITR | Aug 20 2008, 03:57 PM Post #45 |
Project HELLAFLUSH Is Here
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Good Video And I Agree With MR2TURRBO On That Last Post |
[GK-customfield]Real Name[customfield-GK]
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| sammi | Aug 20 2008, 11:23 PM Post #46 |
Doesn't have a home to go to!
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omg ! how clever ! thats a much better way of explaining it than i did ! but what u have said is how i have found fuels ! well explained
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| [GK-customfield]sammi [customfield-GK] | |
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and worked a s a garage attendant




9:25 AM Jul 11