New news on the regulators though ? There is another thread running about the regulators possibly not being up to speed with the uprated pump installs.....maybe this is only pre bugeyed regs that are not up to task ?

Cheers,
Ray

Told ya so;)

Been away for a week, will find out the latest with the MY02 PPP pumps on Monday ;) :D

Dave - It would be nice if you could find out when the pumps are likely to appear at the dealers. My car's due it's first birthday spray it full of smelly stuff body work check soon and I'll do both together if the fuel pumps are imminent. No point ringing the dealers to ask, took them two weeks to even hear about the recall.

Oh and if the springs were available it would be even better, anything you can tell us on this too would be nice....

chelspeed,

I have posted something in suspension ;)

Tony

Got call from my dealer Friday asking me to bring in the car for fuel pump switch. They've already done some of the others, so the word if def out at the dealers.

Has anyone actually measured a drop in fuel line pressure with the OEM pump at high revs/load, either on a standard or modified car?.

I can't imagine why the ECU would want to reduce pump speed at high RPMs.. again, has anyone actually observed or measured this?

I can imagine that the stock pump might struggle with high flowing injectors, but with standard sizes too?. Very curious...

[Edited by AlexM - 2/7/2003 3:34:48 PM]

mutant_matt

I have a UK Prodrive Style STI 7 fitted with a PPP (Just before Christmas)
All seems OK to me on the road but after these threads £30 is a small price to pay to confirm and reassure me that on a rolling road there is no det and the power and torque graphs look OK.

[Edited by scoobycar60 - 2/7/2003 6:48:27 PM]

Pat,

Just as a guess do you think my JDM STi-7 running a full ScoobySport catless zorst from turbo back with 1.25 mm restrictor(peaking at about 1.3 bar boost in 4th) is ok with the standard fuel pump ?

I am planning a remapped ECU with you guys via mail and will change the fuel pump then; however, will I be ok giving my slightly modded car a little stick until I get the remapp and fuel pump sorted ? Delat Dash logs show all positive advance and no sings of leaning out etc ? Always shows above 1.015 O2 sensor reading under WOT ! Seems crazy rich to me !

Finally, what things should I be looking at with my DelatDash logs to see if the fuel pump is keeping up ? ie: On a 4th gear 2,000 - 7,000 run on DD what 'safe' figures should I expect for Injector duty cycle, wastegate cycle and any other categories I should be checking ?

Cheers,
Ray



[Edited by Razor2001 - 2/8/2003 10:04:51 PM]

Matt, tks for the tip. Unfortunately, I had been procrastinating so altho DD is high on my list, I don't have it yet.

Deep, I've heard that too. But comparing with other very similar cars, our boosts are almost the same. Perhaps out of curiousity, I will plug in a mechanical boost gauge and see what it gives.

Re-reading this thread again, one thing springs to mind. With the std ECU, WOT maps are open loop. The lambda sensors are ignored. Therefore, with a higher pressure fuel pump, higher fuel pressure and unchanged IDCs, won't the mixture be even richer than what it was before? (ie a high pressure fuel pump is best used only with a ECUTEK remap tuned with broadband lambda sensing.)

[Edited by RT - 2/11/2003 1:25:54 PM]

Ray it was difficult finding a level bit of road, we got figures clustering around standard flywheel power but at the wheels, so about 325 BHP flywheel, heavy smoothing, assuming 1470 with a full tank then adding passenger weights on. Didn't go daft with the boost 1.35 bar held midrange dropping to 1.25 at 6000, 1.15 at 7000. 1.0 bar was had in 6th at 2650 RPM. This was a Type UK with a (VF34?) with a Miltek sports cat system and a fuel pump. I thought it would be complete pig for boost creep - in fact it took quite a time to get the boost up. The fuelling behaved itself OK with a 91% peak in injector DC at the top end. I took some fuel out, but it was still very rich. Quite a fun car once mapped.

[Edited by john banks - 2/11/2003 7:34:05 PM]

Yes, the lambda sensor, which although not as accurate as a true wideband is not bad for telling you are super rich. It was always richer than 11.2:1 (where it clips rich) on full boost. Since I run my own car at 11.9:1 that did not worry me too much. It is probably still too rich, but the car had a high flow cat which I did not want to set on fire. The only reason the car ever detted was inappropriate ignition timing on the original maps with the free flowing exhaust.

You expect to retard ignition when you increase boost. This is not such a calamity. A denser charge at midrange RPM for example ignites in good time to make a good power stroke compared with a light charge at high RPM. You just need to not go too far that it dets. Changing the base ignition map to something more sensible in the new boost areas and creating new areas of map helped here and took something that was running -1 or -2 knock correction (and still not sorting the det) to something that was putting in lots of positive knock correction across the range, even at high RPM at decent boost. The knocklink was very quiet after that, whereas you could hear the car detting on the original restrictor with the exhaust system on and the ECU could not properly contain it.

But I have absolutely no worries about the way this car was fuelling, it was as rich as the Sultan of Brunei.

[Edited by john banks - 2/11/2003 10:23:25 PM]

Matt / Deep,

IIRC, 1bar = 10000Pa.
1 std atm = 1.013bar = 101300Pa.

Pa = newtons per square meter.

Could we be confusing "atm" with "bar"?
cheers.

EDIT:
Found this link. Very useful!
http://www.processassociates.com/process/convert/cf_prs.htm

[Edited by RT - 2/12/2003 3:58:13 AM]

No doubt there will be an "official" statement, when something has been decided.

As mentioned, it's IM's problem, not Prodrive's, so I would guess Mike isn't really at liberty to comment at the moment.

However, Prodrive will not want PPP cars going bang, so if this is deemed to be an issue, I am sure they will be keen to see it is sorted out in the best way possible.

All IMHO of course ;)

[Edited by russell hayward - 2/12/2003 8:44:56 PM]

M8's Modding his Sti's and was told his Fuel Pump would be OK. Reckoned it was just Prodrive jacking up the Price of the Sti PPP.

Sorry to dig it up a Relic but my Printer's U/S

Fuel pressure is really dropping at high revs in those cars! It can be mapped around it, but is not the way to go in my opinion! If you do so and the pumps capacity will drop a little, it will have a direct influence on the mixture. When the pump has some capacity left, there will be no problem.

Mark.

STiPPP, sorry, but that is rubbish! The OE pump not being up to the job when the car is running more power than standard is well documented by plenty of people, many of whom are not commercially inclined!

Matt.

Are you Tony Robinson presenter of "Time Team" ? :D LOL

Obviously your mate didn't quite believe what I Told you ;)

As I said at the time ;)

"I was only like a "Repoter" due to rumours I had heard ;) The all important Technical Content within the Tread was by some Renowned Tuners & Modders"

Tony