How come my Transit is faster on ¾ throttle
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From: Building a gearbox in Markyate
How come my Transit is faster on ¾ throttle
My Transit, standard 2WD engine. Ahmed Bayjoo stage 1 chip, -31 actuator, running 1 bar.
Spools up fine, have done a fuel delivery rate check (Facet Red Top feeding a fuel swirl pot, feeding standard Cossie pump). Fuel pressure adjusted to suit.
OK, this is felt through the arse dyno, but is definately quicker if NOT at full throttle.
Any ideas anyone? Incidentally, no misfire or the like
Spools up fine, have done a fuel delivery rate check (Facet Red Top feeding a fuel swirl pot, feeding standard Cossie pump). Fuel pressure adjusted to suit.
OK, this is felt through the arse dyno, but is definately quicker if NOT at full throttle.
Any ideas anyone? Incidentally, no misfire or the like
Re: How come my Transit is faster on ¾ throttle
OK, this is felt through the arse dyno, but is definately quicker if NOT at full throttle.
would say that it's properly incorrectly set up ie: fuel and air mixture when on full boost etc
would say that it's properly incorrectly set up ie: fuel and air mixture when on full boost etc
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From: Building a gearbox in Markyate
Originally Posted by SECS
Originally Posted by gearboxman
I wondered about the ignition timing being a bit conservative at WOT...
Could be anything though.
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From: Building a gearbox in Markyate
Originally Posted by RichardPON
Bernie,
My saff used to do the same thing.
Ease off the throttle, and it would pick up and actually go faster.
My saff used to do the same thing.
Ease off the throttle, and it would pick up and actually go faster.
Originally Posted by SECS
Bernie,
The TPS is 0 to 5 volts for L8/P8 and 5 to 0 volts for L1/L6 ecus.
The TPS is 0 to 5 volts for L8/P8 and 5 to 0 volts for L1/L6 ecus.
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From: Building a gearbox in Markyate
If I welded a boss into the downpipe, and fitted a Lambda, could one your monitors be fitted to give me an indication of AFR/fuelling?
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From: Building a gearbox in Markyate
Originally Posted by Stu @ M Developments
Or next time your passing Blackpool on your deliveries i will do it for free Bernie as i owe you a favour. 
Knowing me though, I'll probably continue driving it for ever without doing anything about it. Cobbler's shoes and all that
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From: Derbyshire
Bernie,
In this situation its usually because the WOT enrichment factor is too great and that at WOT the AFR is sufficently rich to reduce power output. If the map is running the injectors flat out and theres a significant WOT enrichment you'll probably find theres sufficent fuel for quite a bit more than 14psi. As Stu says though best to get it checked over, or if you prefer I can have a quick look over it for you at your place as I need to come down to see you soon. (Favours for favours)
In this situation its usually because the WOT enrichment factor is too great and that at WOT the AFR is sufficently rich to reduce power output. If the map is running the injectors flat out and theres a significant WOT enrichment you'll probably find theres sufficent fuel for quite a bit more than 14psi. As Stu says though best to get it checked over, or if you prefer I can have a quick look over it for you at your place as I need to come down to see you soon. (Favours for favours)
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From: Building a gearbox in Markyate
Originally Posted by Shings
Bloody hell.. you all offering favours 
I've even had an offer to drive the van up to Blackpool for me
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From: Building a gearbox in Markyate
Originally Posted by Karl
Bernie,
In this situation its usually because the WOT enrichment factor is too great and that at WOT the AFR is sufficently rich to reduce power output. If the map is running the injectors flat out and theres a significant WOT enrichment you'll probably find theres sufficent fuel for quite a bit more than 14psi. As Stu says though best to get it checked over, or if you prefer I can have a quick look over it for you at your place as I need to come down to see you soon. (Favours for favours)
In this situation its usually because the WOT enrichment factor is too great and that at WOT the AFR is sufficently rich to reduce power output. If the map is running the injectors flat out and theres a significant WOT enrichment you'll probably find theres sufficent fuel for quite a bit more than 14psi. As Stu says though best to get it checked over, or if you prefer I can have a quick look over it for you at your place as I need to come down to see you soon. (Favours for favours)
Originally Posted by gearboxman
If you're coming down here anyway Karl, that would be ideal for me, as I use the van as everyday transport.
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