SMACS Muppet and Numpty corner
22 October 2007, 09:07 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
and little did i know but over time the switch i used (little toggle switch) was breaking down with the load (as i found out from dynodemon the walbro draws quite a large current from the battery)
therefore the switch being underated was causing resistance (the switch was actually getting warm under load) and hence this resistance was causing the fuel pump to actually slow down so when the car was boosting over a certain rpm and the ecu was calling for more fuel press the pump was failing causing the car to lean off at high rpm( a dangerous situation) as it could have popped a piston or arod
this was confirmed on the dyno by the fact that the trace was tailing off at 5ooorpm when it should have been climbing up the bhp scale! the ecu was actually recogonising that the fuel was weak and was cutting the boost down to prevent engine damage(safe mode) therefore casey and others recommended i remove said switch and rewire the pump properly! which i did today and hey presto it goes like fek again! 
i would never have thought such a simple switch could cause so much agro!
but all is well again now and a lesson learned! thankgod for dynoday!
therefore the switch being underated was causing resistance (the switch was actually getting warm under load) and hence this resistance was causing the fuel pump to actually slow down so when the car was boosting over a certain rpm and the ecu was calling for more fuel press the pump was failing causing the car to lean off at high rpm( a dangerous situation) as it could have popped a piston or arod
this was confirmed on the dyno by the fact that the trace was tailing off at 5ooorpm when it should have been climbing up the bhp scale! the ecu was actually recogonising that the fuel was weak and was cutting the boost down to prevent engine damage(safe mode) therefore casey and others recommended i remove said switch and rewire the pump properly! which i did today and hey presto it goes like fek again! i would never have thought such a simple switch could cause so much agro! but all is well again now and a lesson learned! thankgod for dynoday!Basically alan
A: you have been reading up on threads about what someone has done to there car and you thought
i can do that?B: you fitted a dodgy switch, wrongly
why dont you spend some of that cash that you hide under your bed and get someone who knows what there doing to work on your car
22 October 2007, 09:08 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
all you lads goin on how fast your scoobys are and wot bhp they are putting out try being in my boots driveing round in a scooby sport
22 October 2007, 09:21 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:22 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:27 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:29 PM
Scooby Regular
Join Date: Sep 2007
Location: walkden manchester
Posts: 805
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:38 PM
Scooby Regular
Join Date: Jul 2006
Location: Meet Dave he can swim like a fish
Posts: 1,346
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:39 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:40 PM
Scooby Regular
Join Date: Jul 2006
Location: Meet Dave he can swim like a fish
Posts: 1,346
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:40 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
im floating around, mike one of the young lads from smacs is selling his car, gorgeous thing it is, cant believe he's getting rid. go buy it jay, one of the best scoobs around plus it has 350hp which is way more than most STI's
22 October 2007, 09:41 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:42 PM
Scooby Regular
Join Date: Jul 2006
Location: Meet Dave he can swim like a fish
Posts: 1,346
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:42 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:43 PM
Scooby Regular
Join Date: Sep 2007
Location: walkden manchester
Posts: 805
Likes: 0
Received 0 Likes
on
0 Posts
thanks anyway mate
22 October 2007, 09:44 PM
Scooby Regular
Join Date: Sep 2007
Location: walkden manchester
Posts: 805
Likes: 0
Received 0 Likes
on
0 Posts
22 October 2007, 09:45 PM
Scooby Regular
iTrader: (5)
Join Date: Oct 2005
Location: liverpool the capital of culture 08
Posts: 14,025
Likes: 0
Received 0 Likes
on
0 Posts
