Edit Review

[Street Tuner]

Very good question, I also think the answer given was complete Crap.....  Is it just me or do other people see that certain questions get ignored ?

Where's the answer Street Tuner

Here it is. Why the animosity with me Pretzel, I havent been laughing at your car or its times?

Please explain to us people that obviously don't know what happens, how a car in theory decelerating then re-applying power (At least shutting throttle, and re-opening causing boost to drop etc..) will Chirp whilst one that has full power applied immediately to the next gear will not !

You are right Pretzel, judging from this post you are ignorant to the operation of an automatic gearbox or a hydraulic clutch arrangement. At full power with full commanded line pressure, the delay time in building transmission pressure can be substantial. One of the improvements we make to the shift process is to reduce commanded and calculated shift time, which means that although the transmission will shift with greater pressure than standard, it still may not be as high as existant as the same line pressure mapping with full torque reduction, and a slower overall shift speed.

Combine this with the operation of any frictional clutch arragement where the propensity to slip is increased with greater torque application, and my earlier statements begin to make complete sense. A good example would be the clutch in your own manual car Pretzel, which stopped it from running the full claimed 337rwkw on the dyno. My bet is that if you tootled along at 40km/h in second gear and pumped the clutch you could get a chirp out of the wheels. Flat shifting at full power though may not offer the same frictional drive from the clutch lining. Let me know if you require further clarification

Edited 23/12/04 09:19 PM by Street Tuner

[xrturb]

question ..would you car loser power if the intercooler pipe came off

[bcl]

question ..would you car loser power if the intercooler pipe came off

<{POST_SNAPBACK}>

I can't remember hearing this happening on the Ford, but I expect that the IC pipes should be pretty well clamped. IC pipe coming off is more likely where aftermarket kits have been fitted. If a clamp is not tight enough, a hose is most likely to separate when you give it a bootfull and you'll lose all power and probably cut out. It hasn't happenend on my Ford, but on my other cars where this has happened, and quite a few times, the car can be restarted, will act very sick, idles very roughly, massively overfuelling and giving out black smoke, as the air flow sensor is being bypassed.

Someone may have tested this on their Ford.

Brian

[NighEve]

xrturb - most definitely you would lose power (where do you think your boost is gone now - out into the atmosphere and not in your combustion chamber (like driving a Ford programmed XR6 turbo!).

Pretzel - I noticed particularly with the 10psi map a signiifcant increase in repsonsiveness out of the gear chnages (manual remember). I was trying to do soft changes whilst still testing the map out and only reving to 4500rpm and picking second on power I was getting a chirp (this was not full throttle). I have BF Goodrich Z rated tyres with an A traction rating if this also helps explaining the tyre traction.

Too bad you are not in my local area as I would gladly take an interested party for a drive. BTW, good results on your car mate (don't listen to the baggers - you're happy with it and I am confident we have only just seen the beginning of performance on the 1/4 with your impressive MPH).

[xrturb]

thanks bcl

I did a search and there is a hand full of guys had this prodlem

[NighEve]

Did another 110 km this morning on the 8psi map - noticed real time fuel consumption seems to be very acceptable with cruising (done in total 180km and the fuel guage is sitting closer to the left hand middle of the top quarter (ie 80-85 per cent fuel left). Remembering that I did some acceleration work on the first 70km.

Overtook trucks and cars this morning with ease, and a nice little bit of rush, without the russin roulete overboost fun I use dto have (how good this feels!!!!)

[xrturb]

good to here ..I am going to have to get a clamp for my intercooler damn thing pops off

[Pretzel]

Here it is. Why the animosity with me Pretzel, I havent been laughing at your car or its times?

Street Tuner,

Sorry nothing against you personally, I just see that people seem to be very quick to jump on some people when they quote/claim things (Like the claims of my car !) But in this case a valid question was seemingly ignored (Or missed) and there seemed only one person wanting answers !

I did notice you haven't been commenting on my car/claims (In fact you didn't want to get involved in it when asked), so I apologise for jumping on you on this one ! I may have typed before thinking... That happens some times, Bloody fingers !

No hard feelings ?

You are right Pretzel, judging from this post you are ignorant to the operation of an automatic gearbox or a hydraulic clutch arrangement. At full power with full commanded line pressure, the delay time in building transmission pressure can be substantial. One of the improvements we make to the shift process is to reduce commanded and calculated shift time, which means that although the transmission will shift with greater pressure than standard, it still may not be as high as existant as the same line pressure mapping with full torque reduction, and a slower overall shift speed.

Combine this with the operation of any frictional clutch arragement where the propensity to slip is increased with greater torque application, and my earlier statements begin to make complete sense. A good example would be the clutch in your own manual car Pretzel, which stopped it from running the full claimed 337rwkw on the dyno. My bet is that if you tootled along at 40km/h in second gear and pumped the clutch you could get a chirp out of the wheels. Flat shifting at full power though may not offer the same frictional drive from the clutch lining. Let me know if you require further clarification

<{POST_SNAPBACK}>

I kind of get what you're saying, but admit to not understanding the insides of an auto, but in the past when I have had auto's modified, I believe the increased line pressure(to force the next gear quicker), in conjuction with higher shift points has always turned a non-chirping box into a quick shifting chirper (In the same vehicle !) ! This is behind big V8's in the past though.

What is different there(Old boxes) to these boxes(New computer controlled) ?

Thanks

Pretzel

[Lawsy]

Here it is. Why the animosity with me Pretzel, I havent been laughing at your car or its times?

Street Tuner,

Sorry nothing against you personally, I just see that people seem to be very quick to jump on some people when they quote/claim things (Like the claims of my car !) But in this case a valid question was seemingly ignored (Or missed) and there seemed only one person wanting answers !

I did notice you haven't been commenting on my car/claims (In fact you didn't want to get involved in it when asked), so I apologise for jumping on you on this one ! I may have typed before thinking... That happens some times, Bloody fingers !

No hard feelings ?

You are right Pretzel, judging from this post you are ignorant to the operation of an automatic gearbox or a hydraulic clutch arrangement. At full power with full commanded line pressure, the delay time in building transmission pressure can be substantial. One of the improvements we make to the shift process is to reduce commanded and calculated shift time, which means that although the transmission will shift with greater pressure than standard, it still may not be as high as existant as the same line pressure mapping with full torque reduction, and a slower overall shift speed.

Combine this with the operation of any frictional clutch arragement where the propensity to slip is increased with greater torque application, and my earlier statements begin to make complete sense. A good example would be the clutch in your own manual car Pretzel, which stopped it from running the full claimed 337rwkw on the dyno. My bet is that if you tootled along at 40km/h in second gear and pumped the clutch you could get a chirp out of the wheels. Flat shifting at full power though may not offer the same frictional drive from the clutch lining. Let me know if you require further clarification

I kind of get what you're saying, but admit to not understanding the insides of an auto, but in the past when I have had auto's modified, I believe the increased line pressure(to force the next gear quicker), in conjuction with higher shift points has always turned a non-chirping box into a quick shifting chirper (In the same vehicle !) ! This is behind big V8's in the past though.

What is different there(Old boxes) to these boxes(New computer controlled) ?

Thanks

Pretzel

This is a computer controlled line pressure increase though, which is never going to get as high as the pressure levels of a modified auto with a different valve body and pump.

Also, this is increasing the power near 30% at the same time as the line pressure increase.... I bet if you loaded the stock map with the modified auto settings you would get some chirping.

[Guest]

tuna can you pls explain the tranny thing in english as I build tranny's and can understand why its less chirpy but your explanation seemed more of a " if you cant dazzle them with knowledge baffle them with bull "

to me it would simply be the shorter the time between shifts the less slip time we will callit between changes an thus less time for engine momentum build up less chirp less load on clutches and better life!

correct me if im wrong but if you confused me what chance did most have?

going back to other questions like o2 narrow bands I know you answered this at herrods but as to first paragraph explain in english pls as I did not say any thing there cause things were going smoothly and I wasnt there to hamper that but your reply was well not satisfactory!

obviosly these are genuine questions and not meant to stir things up!

thanks dw