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| Help http://www.club323f.com/forum/viewtopic.php?f=18&t=1492 |
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| Author: | Sean [ Sat Oct 23, 2004 2:15 pm ] |
| Post subject: | Help |
I put alot of my mods on the car almost at the same time. When I just had the full s/s system with a decat and ecotek on the car used to do 113 no probs in 4th then pull in 5th. Now, however, after fitting 17s, a bmc-cda induction kit and fse boost valve, the car only does 105 tops. Could it be that my car is needing a service or do you think the ECU needs to be set up for the new changes on a rolling road? Any input would be appreciated. The cars a 1.5 . Thanks, Sean |
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| Author: | richardesty [ Sat Oct 23, 2004 3:44 pm ] |
| Post subject: | |
Hey Sean. Dependant on when she was last serviced, that's your first port of call would be a thorough service. Bearing in mind my severe carbon build up problem at 'just' 62,000 miles there's another possible problem. Rich |
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| Author: | richardesty [ Sat Oct 23, 2004 3:47 pm ] |
| Post subject: | |
Didn't finish did I?!?!? Bearing all the bits in mind, it could be down to set up of the FSE valve and the air inlet adjuster on the inlet manifold. I doubt your ECU needs setting, it should deal with that itself........ Rich |
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| Author: | Sean [ Sat Oct 23, 2004 3:51 pm ] |
| Post subject: | |
Ok thanks again Rich. You're a top guy |
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| Author: | Artermis [ Sat Oct 23, 2004 8:52 pm ] |
| Post subject: | |
or it could be that if u made ur wheels a bit bigger ur cars slowed down a bit. stick ya old wheels back on for 10 mins and see if it goes faster again. Arty |
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| Author: | Smotter [ Sun Oct 24, 2004 9:25 pm ] |
| Post subject: | |
Wheel size makes a difference. I just changed my 195/50/15 tyres for 205/55/15's - on the last long trip I did, I checked with the mile stones and found a 7% change - i.e. my speedo used to be dead on at cruising speeds, now I find my trip meter says about 9.3 km for every 10 km I cover ..... |
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| Author: | richardesty [ Mon Oct 25, 2004 8:08 am ] |
| Post subject: | |
Yeah but if the 'Copper' has used the correct size of 17" tyre - eg 205/40/17 - then the rolling diameter will be the same as original, and the speedo and that will stay the same......even though he's gone up from a 14" wheel. If he's used such as a 215/45/17 - then you're spot on. |
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| Author: | Mark.T [ Mon Oct 25, 2004 8:14 am ] |
| Post subject: | |
thecopper - if you've got a SMALLER outside diameter, your car car will go slower (but accelerate quicker). You might want to get a tape measure on a wheel and compare it with an old one. Smotter, your new OD is about 30.5mm more than the old OD with an unloaded tyre. But I think you're now closer to the standard diameter - I think.  
[b][color=red]Mark[/color][/b] |
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| Author: | Smotter [ Mon Oct 25, 2004 8:23 am ] |
| Post subject: | |
My model came out with 15"x7.5j alloys, and was originally shod with 205/50/15 tyres, so my current size will be a bit bigger than standard. However, this isn't a bad thing, 'cause I get a smoother ride and less risk of writing off my tyres on the many potholes, bricks, rocks, open manholes etc. which add character to South African roads. The manholes are a serious problem these days; the unscrupulous masses tend to steal the covers at night to sell as scrap metal !!! |
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| Author: | Sean [ Sat Oct 30, 2004 2:58 pm ] |
| Post subject: | |
Well I managed to sort this problem! My FSE was to 3.8 on the pressure gauge! Turned it down to 2.8. Then I re adjusted the ecotek valve and tweaked the air intake adjuster. Running like new now! The wheels I have on are 215/40/17 what effect will this have on the speedo? |
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| Author: | Mark.T [ Sat Oct 30, 2004 4:04 pm ] |
| Post subject: | |
That's making your rolling diameter slightly bigger (40% of 215mm is more than 40% of 205mm), so your car will go marginally faster (top end), but will accelerate marginally slower. Mark |
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| Author: | GOGOBROOM [ Sat Oct 30, 2004 4:12 pm ] |
| Post subject: | |
Does that not depend on the width of your rim tho ? could be talking out of my a**e but I have 205/40/17 and my rolling diameter is smaller than my originals. |
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| Author: | Mark.T [ Sat Oct 30, 2004 4:37 pm ] |
| Post subject: | |
Should OK. The height of the side wall is equal to (for e.g.) 40% of the width of your tyre (205mm). But I guess if the rim width is narrower it may pull the rubber in and decrease the hieght, but not by much I wouldn't of thought. Mark |
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