| Author |
Message |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED
Posts: 134
Reg: 06-2008
|
My car`s WOT performance below 3,ooo RPM is soggy , then when it reaches that point, it instantly comes alive and pulls like hell all the way to red line in all gears.
It is essentially stock, is this as good as it gets, or could there be some ignition/fuel problem? |
Mike Bradberry
Goo Roo
Queensland
V8 UnLimited
Posts: 1022
Reg: 07-2005
|
Dirty air filter? Traction control on. Need new points. Need new plugs. Faulty ECU. Blocked Cat/s.
Restricted exhaust. Dirty fuel filter. Water in fuel.
Just a few things that could be considered. |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED
Posts: 138
Reg: 06-2008
|
Traction Control not fitted, others on list(except ECU) would be worse at higher revs you would think.
Does anyone have any suggestions regarding ECU problems, keeping in mind that at exactly three thousand revs, the engine comes alive.
Is the ignition or fuel control staged at that RPM threshold? |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 3845
Reg: 03-2006
|
Probably just the fact its a stock V8? Ive driven my mates stock V8 and it feels the same... |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED
Posts: 139
Reg: 06-2008
|
Daniel Clarke wrote on Wednesday, August 13, 2008 - 07:19 pm:Probably just the fact its a stock V8
Neil, Are my headers there yet? |
Alex Barbieri
TryHard
VIC
UZZ31
Posts: 236
Reg: 08-2007
|
Sounds a bit like whats happening with mine.
I tried:
Spark plugs
Leads
ECU
Fuel Pump ECU
Igniters
Fuel Filter
Techron 5000
Dizzy Caps
and going to get a fuel pump tomorrow. |
Neil Griffiths
Goo Roo
NSW
I have a Cadillac  and a Supercharged Manual V8 
Posts: 4744
Reg: 07-2005
|
Stuart Smith wrote on Wednesday, August 13, 2008 - 08:51 pm:Neil, Are my headers there yet?
HAHHAHAHAH Nope 
I think Stuart & Alex need new Torque Converters  |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED
Posts: 141
Reg: 06-2008
|
Neil Griffiths wrote on Thursday, August 14, 2008 - 05:34 pm: need new Torque Converters
That has come from Left field, Do you mean a higher stall speed |
Neil Griffiths
Goo Roo
NSW
I have a Cadillac and a Supercharged Manual V8
Posts: 4746
Reg: 07-2005
|
Nope, just fixed.
May as well do them at 2,800 while it is getting repaired. |
Steven Anderson
TryHard
NSW
UZZ31 Manual
Posts: 280
Reg: 05-2006
|
Daniel Clarke wrote on Wednesday, August 13, 2008 - 07:19 pm:Probably just the fact its a stock V8? Ive driven my mates stock V8 and it feels the same...
spot on, v8s are doughy below 3000rpm, thats just how they are. |
Cihan Aday
Moderator
Good ol' Victoria
JZZ30
Posts: 2636
Reg: 07-2005
|
The edit:"1UZ" factory computer has a timing hole from 1500-2800 or so, a good 20% margin there to be gained from ignition tuning. IMO the hole is simply there to make the car feel smoother under acceleration.
The tune is very relaxed when the factory computer in concerned, worth looking into a cheap piggyback with timing control as a fix. |
Avin Luther
Goo Roo
vic
uzz31 Limited
Posts: 1244
Reg: 07-2005
|
try a TT ratio diff. Makes the car feel very different. |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED
Posts: 144
Reg: 06-2008
|
Avin Luther wrote on Saturday, August 16, 2008 - 04:20 pm:try a TT ratio diff
What are the diff ratio options? |
Scott Casey
TryHard
nsw
soarer v8
Posts: 104
Reg: 02-2008
|
3.9 v8
4.11 t6
remember different ratios between the v8 and t6 transmissions |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED Proper Prior Preparation Prevents Piss Poor Performance
Posts: 146
Reg: 06-2008
|
Scott, Thanks for the info. I see you have a V8, what is your take on the V8 being soggy below 3,000 RPM? |
Neil Griffiths
Goo Roo
NSW
I have a Cadillac and a Supercharged Manual V8
Posts: 4752
Reg: 07-2005
|
Stuart Smith wrote on Monday, August 18, 2008 - 08:09 pm:Proper Prior Preparation Prevents Piss Poor Performance
Manual Transmissions remove the Soggy Bottom, Boys
http://www.youtube.com/watch?v=OF5OtSO3j6I |
Avin Luther
Goo Roo
vic
uzz31 Limited
Posts: 1247
Reg: 07-2005
|
if you give me a manual Neil, i will pucker up for your soggy bottom! |
Don Bagnall
Moderator
New Zealand
Mercedes Benz SLK230 Kompressor
Posts: 6901
Reg: 05-2005
|
Ewwwwww!  |
Neil Griffiths
Goo Roo
NSW
I have a Cadillac and a Supercharged Manual V8
Posts: 4753
Reg: 07-2005
|
6 Speed Av ?
As they say "It's all sex "
HAHHAHAHAHHAHAHAHHAHA |
Stuart Smith
TryHard
NEW SOUTH WALES
SC400 V8 GT LIMITED Proper Prior Preparation Prevents Piss Poor Performance
Posts: 153
Reg: 06-2008
|
I think I have found the problem here, It doesn`t have a twin screw supercharger, nor does it have a six speed manual trans.
Thanks Neil, I was afraid it may have been something more complicated than that! |
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