Scripted.
Sustained high speed damaging?
- Thread starter sports_brah
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Scripted.
Soldato
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- 8 Sep 2005
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I kick the **** out of my clio around a track all day and don't bat an eyelid, yet i've taken it to 147mph once and never again, because my mind is telling me surely that hammering the pistons along at max rpm (in my clio anyway) for long periods of time can't be good at all.
The alpina on the other hand seemed perfectly capable of cruising along at 150. The engine wasn't screaming and it didn't feel like it was struggling, but then it has got double the horse power and another gear over the clio
The alpina on the other hand seemed perfectly capable of cruising along at 150. The engine wasn't screaming and it didn't feel like it was struggling, but then it has got double the horse power and another gear over the clio
I kick the **** out of my clio around a track all day and don't bat an eyelid, yet i've taken it to 147mph once and never again, because my mind is telling me surely that hammering the pistons along at max rpm (in my clio anyway) for long periods of time can't be good at all.
The alpina on the other hand seemed perfectly capable of cruising along at 150. The engine wasn't screaming and it didn't feel like it was struggling, but then it has got double the horse power and another gear over the clio
I've taken the clio to a similar speed, and it didn't feel good. Once was enough.
Depends on the road/track surface. I've been at the rev limit in 5th on mine too (145gps, 150indicated) and it was relatively stable... More stable than my 1.2 at 80mph.
150 in the 535d is a comfortable 3500 RPM - I'm not sure very much different is going on for the engine at high speed vs. normal speed!
What's the ST rev limit?
I sustained 165mph indicated for a while on an er, autobahn and nobody died. I did 145mph into Spa in my 175,000 mile S-Class and again, no bad things.
More wear for sure but it isn't going to kill the car unless you're doing it day in, day out.
More wear for sure but it isn't going to kill the car unless you're doing it day in, day out.
Exactly this.
If I sat at 155mph in my M3 or 911, its engine would not be anywhere near full capacity, it would be cruising and it would have huge amounts of airflow getting to radiators keeping everything cooler than normal.
OK its not the same as being flat out at 175-190mph with foot wedged to the floor, but still at such speeds the engine is getting exceptional cooling and its in a straight line on what should be a smooth road.
Your suspension gets more abuse on a pot holed or speed bump filled road or going for a country road blast. Your engine will see more wear on a cold start up and being thrashed or hard acceleration through the gears going to rev limiter in each gear.
Cruising at 150mph on the autobahn should not damage anything if the car is well maintained.
bigger scoop?
Possibly would fix it. Boundary layer at high speed is possibly blocking the vent.
Soldato
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Is that your mate of a mate's sisters brother-in-laws, window cleaners granddads R8?
I wouldn't mind smashing that down a autobahn. Bet you loved it.
Good one.
bigger scoop?
That sounds like a cheaper and more reasonable option. I'd rather spend my money on a front mount intercooler instead and then I get to play the "It's always been there, luv" game
Soldato
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Its note quite that simple, wind resistance is quite a force at those speeds Not that i can work it out mind
but there are tables out there that suggest you need ~10x more horsepower to overcome the drag at 150mph in comparison to 70mph. (12bhp vs 145hp)Fag packet maths would probably puts a 200bhp car to what must be close to 100% load @150mph when you factor in mechanical losses as well.
All that aside i would be interested in seeing failure rates of engines that are held at high loads for lengths of times, surely manufacturers go through this process when testing engine/car designs?
I used to regularly do 100mph+ in my mk1 Mondeo. 3am-5am Liverpool > Hertfordshire. It didn't complain at all. It did complain when I stopped doing that and moved to London, where it did 2 years of 50 miles a month all <5 miles and cold starts. It fell to bits.
That sounds like a cheaper and more reasonable option. I'd rather spend my money on a front mount intercooler instead and then I get to play the "It's always been there, luv" game
haha "uh yea....I just shifted it to the front"
"by why is there still one on top?"
"oh that's just part of it...i urmmmmm split it"
watch out for that gf/wife aggro xD