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18-07-2008, 08:57 PM
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Badly Focused
Join Date: Jul 2008
Posts: 487
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Been noticing for a while, if you shift hard (especially 1st-2nd) and get off the clutch fast, there's a NASTY thump from the front end, is this a weak engine mount? Bloody bad noise...
RM.
__________________
07 LT CL, CAI, timing, XR5 springs, LS Zetec wheels 16.045...0.05 of a second! I wanted a 15sec pass! 93 GSR/Evo3...too much to mention, 12.2sec 1/4, FOR SALE! *Maybe we don't try putting holes in things that sink, yeah?* |
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18-07-2008, 10:25 PM
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XR Experiment
Join Date: Feb 2006
Location: Lismore, NSW..
Posts: 420
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I think it is called "axle tramp".....
When I drive my partners CL, and give it a hammering. I get a bit from first - second. Same if I just dump it in the XR5. (standing start no traction control) :evil3: Please correct me if i'm wrong..  :
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18-07-2008, 10:58 PM
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#3 | ||
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Badly Focused
Join Date: Jul 2008
Posts: 487
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Nope, not tramp (that happens too
 ) Hopefully decent springs and shocks'll sort out the tramp. It's like the engine's rocking back and hitting metal. Nasty sound...Maybe the mounts are too soft?RM.
__________________
07 LT CL, CAI, timing, XR5 springs, LS Zetec wheels 16.045...0.05 of a second! I wanted a 15sec pass! 93 GSR/Evo3...too much to mention, 12.2sec 1/4, FOR SALE! *Maybe we don't try putting holes in things that sink, yeah?* |
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19-07-2008, 09:00 AM
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#4 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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The rear mount is really soft, a lot of Mazda3 guys (identical engine bays) replace theirs with a corksport mount or use a locktite product to fill in their stock mount.
But first check that the exhaust shield isnt hitting the exhaust.
__________________
2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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20-07-2008, 03:11 PM
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#5 | ||
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Badly Focused
Join Date: Jul 2008
Posts: 487
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Ahah, that's the info I was chasing. Thanks man, I'll look into that, it gets driven pretty hard and i'll be doing some motorkhana days and sprints with it...bangy noise makes me back off, and that's never good
RM.
__________________
07 LT CL, CAI, timing, XR5 springs, LS Zetec wheels 16.045...0.05 of a second! I wanted a 15sec pass! 93 GSR/Evo3...too much to mention, 12.2sec 1/4, FOR SALE! *Maybe we don't try putting holes in things that sink, yeah?* |
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21-07-2008, 12:44 AM
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FF.Com.Au Hardcore
Join Date: Apr 2008
Posts: 516
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it's because the revs don't fall fast enough for fast changes. the clutch has to slow the engine speed down enough to engage drive again to the wheels. that's the "thump" on heavy changes. even more noticeable on start-up (still on choke)
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21-07-2008, 01:17 AM
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#7 | ||
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Badly Focused
Join Date: Jul 2008
Posts: 487
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I did notice that the revs drop very slowly...is it built into the ECU and the electric throttle, or just a heavy flywheel?
RM.
__________________
07 LT CL, CAI, timing, XR5 springs, LS Zetec wheels 16.045...0.05 of a second! I wanted a 15sec pass! 93 GSR/Evo3...too much to mention, 12.2sec 1/4, FOR SALE! *Maybe we don't try putting holes in things that sink, yeah?* |
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26-07-2008, 11:25 PM
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#8 | ||
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I wanna XR5
Join Date: Aug 2005
Location: South Oz
Posts: 749
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most drive by wire cars are slow in dropping the revs.
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Great Wall X240. Bouncing around the APY Lands Ex Ford owner and member of this great site for ages. South Australia, where the RIGHT hand lane is the NEW LEFT lane??????!!! %&#@* |
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27-07-2008, 11:07 AM
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#9 | ||
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Torquer
Join Date: Jul 2007
Posts: 393
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My TDCi is the same when dumping it into second, quite a thump.
__________________
2007 LT Focus TDCi S Bluefin Remap - K&N Apollo CAI - 2.5" Turbo-back Straight Pipe - 24mm Rear Sway bar - LT Zetec Bodykit - Black Projector Head Lights - LED Tail lights - DMB Overlays - Alloy Pedals - Scuff Plates - Sports Gear Knob - LV XR5 Springs - LV XR5 Wheels - Pirelli P-Zero Nero |
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27-07-2008, 10:26 PM
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#10 | ||
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Focus TDCi
Join Date: May 2008
Location: Melbourne
Posts: 192
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yep same here. only when i do a very quick shift. just need to learn when the sweet spot is to shift gears.
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27-07-2008, 11:18 PM
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#11 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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Also if you want to change quicker consider a lightened flywheel. That though has some negative tradeoffs in terms of speed - depending on how/where you'll be driving.
__________________
2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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29-07-2008, 07:29 PM
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#12 | ||
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Badly Focused
Join Date: Jul 2008
Posts: 487
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It'd make it easier to stall, but that'd be about the only negative tradeoff... That being said, I don't plan to mess with this one too much...I like my warranty
If it comes to it I might just get a heavier engine mount.RM.
__________________
07 LT CL, CAI, timing, XR5 springs, LS Zetec wheels 16.045...0.05 of a second! I wanted a 15sec pass! 93 GSR/Evo3...too much to mention, 12.2sec 1/4, FOR SALE! *Maybe we don't try putting holes in things that sink, yeah?* |
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Engine 'thump' on heavy changes?
Linear Mode
