Under trey and plastic sump!!
- Thread starter Cuprabenwytm
- Start date
I swear they would build the whole car out of Lego if they thought they could get away with it.
Penny pinching to the max, found a replacement steel sump 50 pound so thats going on when i do the dogbone mount
Sent from my MRD-LX1 using Tapatalk
Sent from my MRD-LX1 using Tapatalk
Whilst plastic (polyamide) versions of the sump are cheaper to make, they do have other positive benefits too:
They are 50-60% lighter than metal equivalents. This allows improvements in handling, and as there is less mass this improves power to weight ratios (performance) and mass (thus improving emissions/fuel economy).
They will be quieter (2dB as a rule of thumb, which is quite a lot on a log scale), as it’s easier to design out areas that vibrate (like a drum skin) at the natural frequencies of the engine.
In terms of the vans with plastic underbody protection, the sumps have to be able to withstand impact testing to the same loads as the metal sump - why do you need a tray, if the sump can be designed to have addition strength to the equivalent of sump and trays?
By not having trays this makes it easier to maintain your car, and thus servicing costs should be cheaper, but due to inflation remain about the same price.
They are 50-60% lighter than metal equivalents. This allows improvements in handling, and as there is less mass this improves power to weight ratios (performance) and mass (thus improving emissions/fuel economy).
They will be quieter (2dB as a rule of thumb, which is quite a lot on a log scale), as it’s easier to design out areas that vibrate (like a drum skin) at the natural frequencies of the engine.
In terms of the vans with plastic underbody protection, the sumps have to be able to withstand impact testing to the same loads as the metal sump - why do you need a tray, if the sump can be designed to have addition strength to the equivalent of sump and trays?
By not having trays this makes it easier to maintain your car, and thus servicing costs should be cheaper, but due to inflation remain about the same price.
Just been out to have a look at ours; there definitely is an undertray even if it is only made of crappy plastic. Part # 23 in the diagram here:
underbody trim; noise insulation; heat shield Leon/Leon 4 (LE) 2016 year Seat EUROPA 825000
underbody trim<br/>noise insulation<br/>heat shield Leon/Leon 4 (LE) 2016 year Seat EUROPA 825000 spare parts
Cheaper but surly not as strong, if inwas to lower my baby and accidnetly hit a high speed hump its gunna smash it to bits weres as a nice metal one would have a dint in it, it does have a engine under cover but only a part one, would you recommend installing a full one or just leaving it be
Sent from my MRD-LX1 using Tapatalk
Is. Yours 290 cupra mateJust been out to have a look at ours; there definitely is an undertray even if it is only made of crappy plastic. Part # 23 in the diagram here:
underbody trim; noise insulation; heat shield Leon/Leon 4 (LE) 2016 year Seat EUROPA 825000
underbody trim<br/>noise insulation<br/>heat shield Leon/Leon 4 (LE) 2016 year Seat EUROPA 825000 spare partsseat.7zap.com
Sent from my MRD-LX1 using Tapatalk
As black sheep points out they do have their advantages. One man's plastic is another's composite 
Most are Nylon 66 with some GF reinforcement, which is tough stuff. If you hit something hard enough to wreck a sump then I think I'd prefer it to fail rather than be so stong that you are potentially damaging the engine block.
I built a Tiger Super 6 (Caterham 7 style) and put an aluminium sump on that for the extra baffling to stop oil starvation, but it did make me a bit nervous due to its fragility and minimal clearance. Don't ground your car is the simple answer, so practical ride height and driver awareness.
Most are Nylon 66 with some GF reinforcement, which is tough stuff. If you hit something hard enough to wreck a sump then I think I'd prefer it to fail rather than be so stong that you are potentially damaging the engine block.
I built a Tiger Super 6 (Caterham 7 style) and put an aluminium sump on that for the extra baffling to stop oil starvation, but it did make me a bit nervous due to its fragility and minimal clearance. Don't ground your car is the simple answer, so practical ride height and driver awareness.
I think that this may be the case on some high performance cars (Venturi effect) and on a few eco cars (to reduce drag).
I was always led to believe that the main reasons for the under tray were: i) to prevent debris and excess water entering the engine bay; ii) creates a low pressure area in the engine bay (via aerodynamics) which improves cooling across the rads/charge air coolers etc using the Bernoulli principle to suck air into the engine bay.
My old audi a1 2.0 tdi had a full under tray and that did classify as eco on insurnace lol
Sent from my MRD-LX1 using Tapatalk
Looks like Seat finally solved all their quality problems and reduced the build cost to something even the accountants like
Is it me, or does that look remarkably like a Lancia Delta Integrale? (without the rust or electrical gremlins obviously!)
One of the best cars I have driven, but when the in tank fuel pump failed that job wasn’t so easy, and Lancia prices a joke.
Similar threads
