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#61
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all this IRIS stuff sounds like the VRIS thats in my 2.5l mx-6 beav said it best oh and my 96lsi doent have a power mode light either maybe we could do a vtec light?
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#62
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This shows the effect of the volumetric efficiency vs the speed.
This shows the fuel injection amount verses rpm and the control function of the induction valve. I think the part that isn't always there is in the 2500 to 3400 rpm range. Last edited by svx_commuter; 02-11-2003 at 06:04 PM. |
#63
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What does it all mean??????
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The valve between the two halves of the intake system is open at idle and to about 1800 rpm. This is so that the inlet pulses won't interfere with idle or off idle. At 1800 or there abouts, the valve closes to allow the Inertia effect to increase the cylinder filling. The effect of this can be seen in the peak at about 3500rpm. If the system was not fitted, the torque line would be the lower line, like most other jap torque curves, gutless. It is this system that gives the SVX the 'big push' at 2500 to 4000 rpm. By about 4200 the inertia system has reached it's limit, The long column of air that provided the inertia to force the air in, has now become too heavy to react quickly enough, to the speed of the engine. The induction valve now opens to join the two halves together, this forms a large volume chamber that turns the system into the normal high speed, tuned length, resonate system that most engines use. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#64
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Thanks for the info Harvey.
That's telling it like it is! You never told us how you manage the gears on the dirt bike, you being a Bandit and all. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#65
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Don't try this at home!!!!!!!!
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Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#66
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Re: Don't try this at home!!!!!!!!
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That mean you have two levers to pull on the one side? Backward throttle twist an elegant solution. I thought you might be just booting it through the gears at the right revs. Ever thought of cabling up the pedal brake to the front, or would that not be sensitive enough? Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#67
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TiPSy
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My Ballistic Plum is coming up on 100k miles, and the TPS is acting funny. This may be in empathy with the driver, but I have my excuses. If I do not manage to make worthwhile improvement to it, I will have to bite the bullet and fit a new one soon. Obviously don't want to bite the bullet, as I don't have an unleaded head. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#68
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Joe, with regards
Joe lucky I saw your post as there has bean a lot of traffic of late.
The manual says to measure voltage at the TPS by inserting meter probes into the plug at the ECU. Nice and easy that is ! In order to accomplish the feat more easily you will require, best of all, one of those dress making pins with a nice thin shank and a knob on the end, or a thin needle. Also a meter to measure 0 . 5 volts d.c.. The TPS comprises a potentiometer, presumably used in a voltage divider configuration, as three wires come from it. There is a plug and socket close to the unit so that it can be easily removed for servicing. At this plug the wires are --- black ground and one end of the resistance element, red the other end and white the wiping contact. Stick your pin right through the white insulated wire so that you can clip your meter lead onto it to make measurements. A fine pin will not damage the conductors as they will spread and there will be no significant damage to the insulation. Measure between the wiper, i.e. white wire and ground by connecting to engine, chassis. or whatever. Now from the book :-- 1. Connect all connectors. 2. loosen TPS fixing screws. 3. Turn ignition on. 4. Adjust TPS position while throttle valve is FULLY closed, using a volt meter, to specified voltage. 5. tighten fixing screws. The voltage is specified as 0.45 -- 0.55 volts. I had no trouble in setting things at exactly half a volt. Before removing the TPS or altering the original setting it is a good idea to mark the mating castings with a scratch so that one can check on the adjustment, before and after, as a matter of interest. It always is nice to know if the effort expended has in fact improved things. Knowing the connections of the unit it is easily checked with an ohm meter after removal for smooth operation or otherwise. Evan without dismantling a spray with CRC or similar cleaner and a work out will do wonders. The resistance end to end ( black to red ) should measure very close to 5000 ohms. Having rather laboriously typed the above I think I should do a spot of pasting and stick it in Ò technical Ò as others may be interested. I hope you will have improvements as a result.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#69
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Mystery +30hp
This thread was before my time. Too good to miss. Gotta share.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
#70
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Re: Mystery +30hp
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I christened my car the ICBP, or intercontinental ballistic plum, due to its missile-like speed on the highway, and the colour, which is Black on Bordeaux or Guinness over Shiraz, whatever you're having yourself. I fitted a new TPS at exactly 0.5 volts, but I still get a throttle flare going from 2 to 3. Happens all the time on a light throttle, so now, I drive in Power mode all the time, which increases the revs at which changes happen, and so increases the line pressure, so I don't get slippage. At the moment, my gearchanges are a little jerky in power mode, but no code is shown, so I'm not sure what's causing it. Oh, and my Ballistic Plum is now clocking up to 180K kilometres Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#71
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Funny how?
I thought it had something to do with continence.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
#72
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Re: Funny how?
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Andy ------------------------------------------------------------------------------------ If I would be a young man again and had to decide how to make my living, I would not try to become a scientist or scholar or teacher. I would rather choose to be a plumber or a peddler in the hope to find that modest degree of independence still available under present circumstances. -- Albert Einstein, The Reporter, November 18 1954 |
#73
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All this talk of power mode... I think I've seen that power light like 3 times in the 3 or 4 weeks I've owned the car. I always manually downshift, so I don't end up mashing the throttle to downshift. I never stab at it to accelerate either. I find that "rolling on" the throttle is better for performance, as a few people have mentioned.
I don't see what the benefit of raising the shift points is either... it'll go all the way to 6500 unless I let off on the throttle. usually I have the gear selector in the gear I want to be in anyways. it's a habit I got into with my Impreza. I manually shift it by reflex now. keeping it in whatever the optimal gear for your speed is will keep the tranny heat down also, since the TC isn't spinning against itself very hard. just have to be careful to avoid engine braking since that does spike up the heat considerably.
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IggDawg is cool -IggDawg 1992 Teal SVX LS-L 160k miles 4.11:1 final drive, K&B dropsprings, ART front rotors, stainless steel brake, aluminum underdrive crank pulley, Kuhmo Ecsta Supra 712's, K&N drop-in filter. Previously owned by Alacrity024. FOR SALE 1994 SVX LSi, Barcelona Red #1659, build date 11/93, 117k miles, RIP ECUtune stage 1, bead crush, smallcar shift kit, TB bypass, SS brake lines, silencer removed, alternator and grounding wires, Mobil1 @ 117k |
#74
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Continence?
Yep, continence is an issue, that's why I have a recumbent seat in my SVX Andy. I think it's because the car drinks a lot.
IggDawg, you must have missed the point that the flare only happens 2-3 on a light throttle. Due to the higher line pressure [I presume?] this problem does not show at all under full bore acceleration. As I have the switch in my JDM car for forcing Power mode, then with Power on the TCU holds on to lower gears longer no matter whether I am accelerating hard or gently so that when the shift occurs the pump is at higher revs and pressure, and does away with the slippage. Shift points at WOT would be the same as you say, but what I am doing is raising the 2-3 shift point at normal acceleration levels to avoid a problem. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#75
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I found the hidden 37 HP in my SVX . It was right next to the alternator pump, and just behind the flux capacitor. Now I can use that extra HP to get me up to 88 MPH faster. Can't wait!
Dave P.S. The "secret" oil leak Subaru built into my Outback engine is really there to lubricate my muffler bearings! |
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