FS: 1991 RB20DET Sileighty $12000 ono
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Turbo gods, some assistance and recommendations please I'm looking into a turbo kit for my 2.5 from MX5 Mania >>>>> https://mx5mania.com.au/products/copy-of-mx-5-nc-2-5-litre-engine-conversion-turbo-2005-2013 Power wise I would like about 200kw atw, and of course dose noises, apparently if you keep a stock 2.5 under around 200kwatw the engine will not hate life even when ragging on it a bit Max RPM on the 2.5 is around 6500rpm The turbo MX5 use is something around the disco potato size as packaging room for the turbo is pretty limited, which will, I believe will give me my power goals and not have the turbo either under, or oversized, but the rear housing bit is confusing It comes with either a 0.64 or 0.86 From my understanding, which so far is based off googling, so make of that what you will 0.64: spools faster = good Makes more EGT heat on boost = bad Less topend power than 0.86 = I'm only looking for 200 atw so that point may be mute????, I don't know, hence my questions 0.86: Spools a "little" slower = how much slower??? remembering 6500 is my max rpm Makes less EGT heat = good Makes a little more power up top = again, power goals is only around 200 Also, this is a street car, so there will not really be any long track sessions, in saying this I would want it so it was happy with at least 3 hot laps at Wakefield Park if the need arises I already have a fancy pants triple pass radiator, and a oil cooler with thermostat will be getting installed as well Thanks for any information or recommendations you have 👍, and of course, the comments about me wasting money on drive in drive out modifications, or any other snide remarks about my manhood for owning a MX5 🤣 -
Tape some wool onto the vent then take it for a drive I did this to my reverse cowl and was instantly unhappy, as anything over about 60kph would have the wool enter the engine bay, thus just adding underbonnet pressure and stooging my coolant stack, it did let alot of heat out when stationary though, which really didn't help once the car was moving, with the reverse cowl you could watch the coolant temps cheap up the faster you went on the hwy, I assume it would be alot worse doing track day speed With the vented bonnet (just after the radiator and about 1/3 up the bonnet) on my old R33 the wool on the leading edge sat at about a 45° angle as air poured out of it From looking where your vents are, and their size, I believe you should be fine at speed and air should be evacuated from the engine bay, I think it will be a night and day difference when stuck in traffic though for removing the trapped heat, and not sitting there cooking when parked up after driving around... #convection Post wool tuft pics and data for science This beastie is one nice and unique rig, enjoy
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It is possible to do this stuff for "cheap". But you need to be able to get deals on all the bigger items, and it really helps if you're fully capable of doing your own work. As soon as you're paying retail for new parts, or buying "kits" because you can't fabricate necessary bits and pieces, and if you really need someone else to take the reins of doing the work because you don't have the space/time/skills/confidence to rip deep into the car and put it back together in a working fashions.....then you pay. And these days, pay means a lot of money. You'd think things would get cheaper, but they don't. They just seem to keep getting more and more expensive. -
It’s almost the price of an engine build, you won’t have anything to bolt onto it though -
Hopefully it's enough to help with the temps! I was also only shit stirring, regarding Murphy's Law basically. I've found, what ever spare parts I have, are the parts I don't break. Ever. Also have never had issues with oil/spinning bearings until I put oil pressure gauges on the car. 😛
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