Grub screw costs 100hp @ wheels!!
28-10-2008, 08:51 PM
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Grub screw costs 100hp @ wheels!!
Have had my Escort on the rollers in a bid to get a couple of back to back runs as a reference for some planned mods, trouble is I couldn't get any runs to come close to each other
The highest figure I have seen is 540hp and the lowest 463hp, after a bit of head scratching I found the below..
This is the inside of a Tial wastegate and the arrowed part is the little bastard that managed to unscrew itself and hold the wastegate slightly open by varying amounts as it worked itself around! (new wastegate used for photo, mine was badly marked). Just wondering how long it's been like it!!!
The underside of the diaphragm with the offending grub screw..
Just before I left work tonight I managed two back to back runs with 3hp difference, the best being 565.7 @ the wheels, using 2.2 bar boost tailing to 2.0 at the top. Need to try it with a bit more boost and ign now
Last edited by Martin-Hadland; 28-10-2008 at 08:55 PM .
28-10-2008, 08:54 PM
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obviously you aint telling us what the new mods are but are you going to move the top speed again
28-10-2008, 08:56 PM
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little fucker
hope you whacked a bit of loctite in there to stop it spinning loose again
28-10-2008, 08:56 PM
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whats that at the fly?
i assume the marks are the thread whacking it all the time
28-10-2008, 09:00 PM
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Wow, I bet that was frustrating to suss out !
28-10-2008, 09:01 PM
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Quote:
Originally Posted by
Spiky
whats that at the fly?
i assume the marks are the thread whacking it all the time
I think he wrote @ wheels???
Reyland: nice one, did you notich the missing power or?
28-10-2008, 09:01 PM
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was there any way that little fcker would have made it into the engine? or is it directly into the exhaust side of things of fresh engine bay?
28-10-2008, 09:04 PM
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28-10-2008, 09:10 PM
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Quote:
Originally Posted by
cossiemanden
I think he wrote @ wheels???
I did notice sometimes it didn't seem to have the same pull but I put it down to me getting used to the power
Quote:
Originally Posted by
dojj
was there any way that little fcker would have made it into the engine? or is it directly into the exhaust side of things of fresh engine bay?
No chance of it escaping anywhere.
28-10-2008, 09:21 PM
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28-10-2008, 09:24 PM
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Quote:
Originally Posted by
cossiemanden
I think he wrote @ wheels???
i know i read it right, like you,
hence me asking what it was at the fly?
28-10-2008, 09:26 PM
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Quote:
Originally Posted by
Spiky
i know i read it right, like you,
I don't like flywheel figures on rolling roads hence the reason why I quoted the deadly accurate @ wheels figure.
28-10-2008, 09:28 PM
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thats good going judging by the DD whels figs I have seen.
28-10-2008, 09:28 PM
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so is that roughly 140 bhp less at the wheels to what it had on the dyno at the flywheel
28-10-2008, 09:31 PM
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Quote:
Originally Posted by
glancy2081
so is that roughly 140 bhp less at the wheels to what it had on the dyno at the flywheel
It made about 680hp on SUL on Harvey's dyno
28-10-2008, 09:33 PM
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Quote:
Originally Posted by
martin-reyland
I don't like flywheel figures on rolling roads hence the reason why I quoted the deadly accurate @ wheels figure.
fair comment
28-10-2008, 09:36 PM
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good find martoon
at the wheels is the new bhp pub talk
Last edited by leecavturbo; 28-10-2008 at 09:40 PM .
28-10-2008, 09:36 PM
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Any probs you get on DD seem to when they sometimes add inaccurate bhp for fly figs so I think your doing the right thing MArtin
28-10-2008, 09:43 PM
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Nice find, even better gain Martin
Quote:
Originally Posted by
rapidcossie
thats good going judging by the DD whels figs I have seen.
How do you mean?
28-10-2008, 09:44 PM
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Quote:
Originally Posted by
leecavturbo
good find martoon
at the wheels is the new bhp pub talk
The sooner we all start talking wheels figures the better
28-10-2008, 09:55 PM
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Good bit of detective work that!
Sort of thing that can take a fucking long time to find!
540@wheels isnt shy either, good starting point
28-10-2008, 09:55 PM
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Quote:
Originally Posted by
martin-reyland
The sooner we all start talking wheels figures the better
Suits us FWD boys just fine
(mine is rwd but on a fwd setup)
28-10-2008, 09:56 PM
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so the grub screw was getting trapped under the diaphragm carrier to hold the valve open a bit presumably (hence the marks under the diaphragm?) rather than the retainer nut coming loose Martin?
28-10-2008, 09:59 PM
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Quote:
Originally Posted by
richm
so the grub screw was getting trapped under the diaphragm carrier to hold the valve open a bit presumably (hence the marks under the diaphragm?) rather than the retainer nut coming loose Martin?
Yes, you can also see that at times it lived in the diaphragm which would have given normal power.
28-10-2008, 10:36 PM
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little fecker, take It anyone with a new one would be wise to dab a little threadlock onto it?
Last edited by Franco; 29-10-2008 at 07:45 AM .
28-10-2008, 10:38 PM
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Quote:
Originally Posted by
Chip
Suits us FWD boys just fine
(mine is rwd but on a fwd setup)
i'm only around 140 at the wheels
28-10-2008, 10:47 PM
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Quote:
Originally Posted by
Spiky
i'm only around 140 at the wheels
Thats cause your car lags so badly
28-10-2008, 10:47 PM
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Quote:
Originally Posted by
Chip
Thats cause your car lags so badly
lag is way forward
28-10-2008, 10:49 PM
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Quote:
Originally Posted by
Red16
Nice find, even better gain Martin
How do you mean?
IMO DD usually read lower than expected wheel figs but higher than expected fly.
28-10-2008, 10:59 PM
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Quote:
Originally Posted by
Spiky
i'm only around 140 at the wheels
im only around 300 at the wheels
28-10-2008, 11:02 PM
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Quote:
Originally Posted by
rapidcossie
IMO DD usually read lower than expected wheel figs but higher than expected fly.
Ah right... ok.
im gonna jump on the bandwagon and say im 285bhp @ wheels on DD
28-10-2008, 11:10 PM
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Quote:
Originally Posted by
sbd16v
im only around 300 at the wheels
turn your boost up then ya fag
28-10-2008, 11:13 PM
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Quote:
Originally Posted by
leecavturbo
turn your boost up then ya fag
New inlet is being made at the moment, then we will be
28-10-2008, 11:16 PM
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Quote:
Originally Posted by
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New inlet is being made at the moment, then we will be
29-10-2008, 08:52 AM
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Quote:
Originally Posted by
martin-reyland
The sooner we all start talking wheels figures the better
I agree. The wheel figure after all is whats seen on the road and most relevent to performance.
565 bhp ATW is very impressive for a 4x4 car.
29-10-2008, 09:07 AM
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WOW!
29-10-2008, 09:21 AM
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Well done Mart,
Bet you was over the moon when you actually found the prob !! lol
Love your threads like this, always interesting to hear what your up to especially with your Escort etc !! So Thank you !!
jb
29-10-2008, 09:24 AM
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what a naughty little bugger of a fault
29-10-2008, 10:02 AM
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i actually have a box of grub screws that i can sell to anyone for £200 each,outstanding results of a minimum of 100bhp,be quick though these will sell out fast.lol
29-10-2008, 10:15 AM
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Quote:
Originally Posted by
james kiely
i actually have a box of grub screws that i can sell to anyone for £200 each,outstanding results of a minimum of 100bhp,be quick though these will sell out fast.lol
Thats 100hp @ the wheels too !!
28-10-2008, 08:51 PM
Grub screw costs 100hp @ wheels!!
The highest figure I have seen is 540hp and the lowest 463hp, after a bit of head scratching I found the below..
hope you whacked a bit of loctite in there to stop it spinning loose again 
