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Post by AutotestAddict on Feb 8, 2017 14:41:54 GMT
I never thought I'd be that guy but apparently now I am. My supercharger is intolerably loud, I rarely drive the car and when I do I don't really want to bomb around everywhere like a knob.
I think the 'charger is on its way out, or it might just be I'm spinning it too fast, but I think it needs to go and I'm loath to replace it with another given this is my third and its getting silly.
So can someone who knows about these things point me in the direction of a sensible interim (year?) setup. Is it as simple as air filter straight on to the intake, new PS belt and a remap? Current setup is 'charger (small pulley), large intercooler, large crank pulley, megasquirt, big injectors, 2x throttle bodies, BOV etc.
Longer term, I don't think I could be happy with anything less than 180bhp and 200bhp feels ideal. I love the low down autosolo winning torque of the charger. Which setup would get me closest to this, using much of the kit I already have, without actually using another supercharger? I'm thinking maybe twin teensy turbos?
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Post by myothercarsa2cv on Feb 8, 2017 16:24:43 GMT
I've considered this as I am also supercharged... the turbo kit, manifold, downpipe and turbo won't cost more than 1K, plus a couple hundred for remap, and you'll recoup a lot of the cost by selling the supercharger kit. More power for little money.
But to do it with a turbo that gives you low down torque and doesn't run out of puff means using an expensive turbo.
I think I've decided to go for cams for that extra poke, I'm currently using a 146/60 pulley combo so at the limit of the M45.
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Post by BikeTuna on Feb 8, 2017 17:39:33 GMT
I think you need to swap your car for my 2.5 and then fit the twin turbo setup from stock.... would fix all your woes!
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Post by AutotestAddict on Feb 8, 2017 19:07:58 GMT
I think you need to swap your car for my 2.5 and then fit the twin turbo setup from stock.... would fix all your woes! Would certainly fix some of my woes... I'm guessing you have never seen my car however! My total lack of knowledge about turbos is not helping. I think I probably just need the tiniest little thing going, I'll happily take mid range grunt over a higher top end, and all the 'standard' td04 td05 conversions seem to be good for 250ish top which is more than I want/need.
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Post by BikeTuna on Feb 9, 2017 8:04:39 GMT
I think you need to swap your car for my 2.5 and then fit the twin turbo setup from stock.... would fix all your woes! Would certainly fix some of my woes... I'm guessing you have never seen my car however! My total lack of knowledge about turbos is not helping. I think I probably just need the tiniest little thing going, I'll happily take mid range grunt over a higher top end, and all the 'standard' td04 td05 conversions seem to be good for 250ish top which is more than I want/need. Well, joking aside, its a serious offer, I'd love a SC mk1 and don't care about the condition - PM me if you wanna chat about it...
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Post by moro on Feb 9, 2017 8:16:37 GMT
I would've thought the throttle response of a turbo engine wouldn't really suit the nature of autosolo...
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Post by myothercarsa2cv on Feb 9, 2017 9:51:47 GMT
I would've thought the throttle response of a turbo engine wouldn't really suit the nature of autosolo... Surely depends on the turbo... my little rental Polo TSi I just gave back had good boost from 1400rpm. Or just go for anti-lag and buy a new turbo every so often
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Post by Rickster on Feb 9, 2017 10:39:15 GMT
I would've thought the throttle response of a turbo engine wouldn't really suit the nature of autosolo... I think this highlights that quite well If you want linear, controllable boost to the redline then I reckon Rotrex is the way to go! aint cheap though. Turbo rallycross cars often have clever ALS (antilag systems) to give them instant but controllable throttle response. there is a really interesting thread somewhere but i cant find it!!
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Post by Rickster on Feb 9, 2017 10:40:51 GMT
Or like the thread on here somewhere - drop a nice 3l v6 jag engine in!
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Post by Woofwoof on Feb 9, 2017 11:44:44 GMT
. Is it as simple as air filter straight on to the intake Assuming the bearings are not going on your current S/C and it's not got incorrect pulley ratios, try a suitably sized enclosed air filter housing. It will make a big difference to the S/C induction noise.
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Post by gmolargey on Feb 9, 2017 20:21:59 GMT
are you running dual throttles?
You wouldn't know the car is supercharged unless you get into boost with duals.
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Post by AutotestAddict on Feb 10, 2017 8:35:42 GMT
Or like the thread on here somewhere - drop a nice 3l v6 jag engine in! A long term aspiration, but having done the sums, approximately £8k for the completed rocketeer kit is *way* out of reach for the foreseeable.
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Post by AutotestAddict on Feb 10, 2017 8:37:20 GMT
. Is it as simple as air filter straight on to the intake Assuming the bearings are not going on your current S/C and it's not got incorrect pulley ratios, try a suitably sized enclosed air filter housing. It will make a big difference to the S/C induction noise. Good shout, I'll give that a try. The pulley ratios are 'incorrect', it is running stupidly fast, boosts at idle, and the charger 'redlines' at 6.5k engine rpm. I expect it might be the bearings given the noise.
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Post by AutotestAddict on Feb 10, 2017 8:40:05 GMT
are you running dual throttles? You wouldn't know the car is supercharged unless you get into boost with duals. I am running dual TB's.... and I now wear ear plugs whenever taking the car out. This is not me being wussy (ok maybe it is) but me trying to avoid returning with a splitting headache after an hour's tootle. Its too noisy even at 30mph in 5th. "wouldn't know the car is supercharged" is quite a long way from my current situation!!!
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Post by Woofwoof on Feb 10, 2017 11:34:59 GMT
Assuming the bearings are not going on your current S/C and it's not got incorrect pulley ratios, try a suitably sized enclosed air filter housing. It will make a big difference to the S/C induction noise. Good shout, I'll give that a try. The pulley ratios are 'incorrect', it is running stupidly fast, boosts at idle, and the charger 'redlines' at 6.5k engine rpm. I expect it might be the bearings given the noise. Boost at idle says it all. Having the incorrect pulley ratio is bad news on a couple of counts. Besides causing excess induction noise you are also overheating the S/charger and in turn losing power - remember the achilles heel of an S/C system is heat. Excess heat would also have a knock on effect causing premature bearing failure too. Off the top of my head if your S/C is standard ie not ported, I think a sensible max boost pressure if you are using say an Eaton M45 would be something like 10 psi. Don't rush into changing the bearings initially (even if that's good preventive maintenance along with an oil change) maybe try getting the pulley ratios sorted first.
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