Resonance in fifth about 2000rpm 50mph
Discussion
hi all.
Have now put about 800 miles on the targa & just wanted to ask a few things
As above, resonance goes right through the car, cannot seem to make it happen in fourth at lower revs. Off the power its not there but slight right foot & its very noticeable- Is it normal do they all do this? ?
Also:
What a pita trying to work out the oil level, its half way up the stick when hot.
Targa panel noise: think i have worked this one out as the rubbers had split longitudinally & new rubbers are to be fitted next week.
High speed weaviness when not on absolutely perfect tarmac almost like play in steering in dead ahead. Doesnt happen at slow speed but certainly adds to lack of confidence in high speed sweeping corners. I had the car checked & all they found was that the frontend was 20mm low which apparently will increase bump steer & the tracking was slightly out. This has improved it. I have come from elises so know all about feeling every ripple in the road but the front end always felt planted at highspeed.
Any help & advice appreciated.
Oh yes 03 t350t
Mark in Suffolk
Have now put about 800 miles on the targa & just wanted to ask a few things
As above, resonance goes right through the car, cannot seem to make it happen in fourth at lower revs. Off the power its not there but slight right foot & its very noticeable- Is it normal do they all do this? ?
Also:
What a pita trying to work out the oil level, its half way up the stick when hot.
Targa panel noise: think i have worked this one out as the rubbers had split longitudinally & new rubbers are to be fitted next week.
High speed weaviness when not on absolutely perfect tarmac almost like play in steering in dead ahead. Doesnt happen at slow speed but certainly adds to lack of confidence in high speed sweeping corners. I had the car checked & all they found was that the frontend was 20mm low which apparently will increase bump steer & the tracking was slightly out. This has improved it. I have come from elises so know all about feeling every ripple in the road but the front end always felt planted at highspeed.
Any help & advice appreciated.
Oh yes 03 t350t
Mark in Suffolk
On our Tamora the front end felt a bit light and weave after having the geo set up. Speaking to the specialist who did it he said they are set very neutral to give a quick turn in. Not perfect for the road, so he added a smidge ( 1/2 degree IIRC) of toe in to the tracking and this has made it much less sensitive.
Interesting,y I had to do similar on my wedge a few years back, otherwise it felt like you we're in a fifties movie seen and constantly sawing at the wheel in a strait line.
Interesting,y I had to do similar on my wedge a few years back, otherwise it felt like you we're in a fifties movie seen and constantly sawing at the wheel in a strait line.
Presuming that the resonance goes once above 2000 rpm, then nothing to worry about. The s6 is built to rev not lug around like a diesel although some, especially those with a rebuild, will tell you that as low as 1700 is ok in 5th, slightly different cam profile possibly?
If you've had the tracking done by a recognised expert and all is as it should be, try playing around with tyre pressures, they should be around 24 psi if the correct tyres are fitted. However I've noticed on quite a few threads recently people are putting cheaper tyres on, which is fine in itself as long as they are making sure the load ratings are in line with the cars weight. I'm convinced the stiffer side walls of higher rated tyres can seriously affect the way a light car behaves and not taken into account when people just spec tyre size, width and profile.
If you've had the tracking done by a recognised expert and all is as it should be, try playing around with tyre pressures, they should be around 24 psi if the correct tyres are fitted. However I've noticed on quite a few threads recently people are putting cheaper tyres on, which is fine in itself as long as they are making sure the load ratings are in line with the cars weight. I'm convinced the stiffer side walls of higher rated tyres can seriously affect the way a light car behaves and not taken into account when people just spec tyre size, width and profile.
Hi Mark
Yes I went through the same unnerving experience with acceleration on what looked like smooth tarmac. Do what S6boy says, check tyre pressure. I don't run higher than 24psi but don't mind if it drops 1 or 2 psi below that. This helps pliancy and gives the car a little more stability i.e. not jumping of the tarmac so much so you are in contact with the ground more of the time. It will never have the finesse of an Elise but this will help a little and you get used to it.
I went from a Mk3 MR2 (not quite an Elise, I know) to a T350T. Point to point on a B-road, the MR2 is quicker due to being able to have the confidence to floor it. I may not be going so quick in my T350T point to point, but I'm definitely having more fun with the noise and the character of the T350.
Yes I went through the same unnerving experience with acceleration on what looked like smooth tarmac. Do what S6boy says, check tyre pressure. I don't run higher than 24psi but don't mind if it drops 1 or 2 psi below that. This helps pliancy and gives the car a little more stability i.e. not jumping of the tarmac so much so you are in contact with the ground more of the time. It will never have the finesse of an Elise but this will help a little and you get used to it.
I went from a Mk3 MR2 (not quite an Elise, I know) to a T350T. Point to point on a B-road, the MR2 is quicker due to being able to have the confidence to floor it. I may not be going so quick in my T350T point to point, but I'm definitely having more fun with the noise and the character of the T350.
Haha, thanks for all this. I have had the tyres upto 28 as the manual advises for trackdays & strangely this did seem to help a bit, will put them back to 24 now & see (did seem a bit bouncy at the rear though).
Know exactly what you mean keefy44. Wasnt expecting eliseness & i could seriously fly with confidence with 190brake : No way could i drive the 350 like that. When it first happened i was coming up to a corner just as the cam kicked in, backed off & thought someone had disconected the steering. Must sort it as stopping me from getting beyond 5500 on the back roads; you know just where the omg kicks in !
Will see about more toe in. I was also blaming the dampers, read somewhere that peter wheeler was obsessed with 0-100 times so that was why the rear end was set up slightly soft to aid traction.
Might start saving for some adjustables as was always happy with the gaz on elises :-)
Know exactly what you mean keefy44. Wasnt expecting eliseness & i could seriously fly with confidence with 190brake : No way could i drive the 350 like that. When it first happened i was coming up to a corner just as the cam kicked in, backed off & thought someone had disconected the steering. Must sort it as stopping me from getting beyond 5500 on the back roads; you know just where the omg kicks in !
Will see about more toe in. I was also blaming the dampers, read somewhere that peter wheeler was obsessed with 0-100 times so that was why the rear end was set up slightly soft to aid traction.
Might start saving for some adjustables as was always happy with the gaz on elises :-)
Don't drive at 2k RPM in 5th... Simples your labouring the engine otherwise and will get resonance, change down, no resonance, thats where it likes it As mentioned its not a diesel! It's a high revving engine so it's sweet spot is higher than 2k in every gear.
In terms of panel noise, get them in right, increase the depth of foam around the inside (don't go overboard a few mill more on top if the existing foam does the trick as you won't get it in otherwiseZippee also advised me of a trick to reduce cabin noise by inserting washer pipes inside the door surround rubber. Almost zero cabin noise! Interesting after a new windscreen and seals the noise reduced further
your labouring the engine otherwise and will get resonance, change down, no resonance, thats where it likes it As mentioned its not a diesel! It's a high revving engine so it's sweet spot is higher than 2k in every gear.In terms of panel noise, get them in right, increase the depth of foam around the inside (don't go overboard a few mill more on top if the existing foam does the trick as you won't get it in otherwise
Zippee also advised me of a trick to reduce cabin noise by inserting washer pipes inside the door surround rubber. Almost zero cabin noise! Interesting after a new windscreen and seals the noise reduced further MOM said:
Cheers for that.
Undestand the diesel bit & its the engine i bought the car for rather than the v8's, just that when the wife is with me & stuck in 50mph traffic i try to keep the noise down- lower gear it is then.
What sort of washer tubing & does it also help the doors spring open?
Hi, I just went to Halfords and bought about 4 metres, the usual windscreen washer tubing Undestand the diesel bit & its the engine i bought the car for rather than the v8's, just that when the wife is with me & stuck in 50mph traffic i try to keep the noise down- lower gear it is then.
What sort of washer tubing & does it also help the doors spring open?
you will need to insert in into different areas and you will notice that one area means you can't close the door, at the front section, so move it round. Use WD40 so it slides more easily through the inside of he rubber . It improves the springiness a smidgen. If your window is already tight then do not put any at the top area or at least play around with it etc.Gassing Station | Tamora, T350 & Sagaris | Top of Page | What's New | My Stuff