Depends on the tracks you drive ? I've never hillclimbed in my life, nor trackdayed, but I love a country lane blast in beast mode especially up hill.. My feeling is throttle response accuracy in the corners benefit from the SC..
Bigger SC ? Get some advice from an SC tuner on how to ring more out of it ?
Get a ride in a turbo car ? Are you "lagging behind" turbocharged mx5s in your competition times ?
Definitely keep to a smaller turbo if you go turbo, gt25 ? td04 with some tricks ?
Post by Vindi (Russell) on May 12, 2019 8:23:35 GMT
I went from supercharged to turbo, and then went back. The way the supercharger delivers the power is just so much nicer.
As above, I'd agree that Rotrex is the best option for really useable power. There's a Rotrex car in the US currently just under 400bhp, so there's plenty of head room as long as you pick the right Rotrex unit
Ah, now a Rotrex might be a good option. They’re a lot of £ though.,
Same money as a quality 3-400bhp capable turbo? If you don't need that much power, there's maybe no real huge in changing to a turbo? You can get 220bhp ish out of an MP45. So unless you want a lot more than that, and are ready for a forged engine, better gearbox and diff, updated chassis etc, is it really worth it?
Might be worth adding a brief rundown of what your current power / supercharger setup is, what your main use for the car is and your target power. And then what you've currently got for clutch, gearbox, brakes, diff, any chassis mods etc so we can think about what might be needed for the next stage?
Less than 200hp. IC’d M45, Oil Cooler, Alloy Rad, ME221, IL Motorsport mounts. 6kg Lightened flywheel & Skuzzle Clutch, std 5speed box with shortshift, Torsen 4.1 diff, (IL Motorsport mounts sat in the garage waiting to go on...) Std sport chassis with Brembo Discs & Carbon Lorraine CL5 pads, HSD monopros, Full track Geo setup, Rainsport 3 tyres(!!!!)
I use the MX5 almost exclusively for sprints & hillclimbs: What I’m looking for is something tractable so I can get out of hairpins & still be quick on high speed tracks. A competitor of mine has a 700kg 200hp turbo’d car & peak power is done at 5700rpm, I beat him outright at Goodwood where I can take advantage of the handling but get stuffed at Gurston due to my extra weight ( I still win on handicap). My target is a 260 hp dry map & 200hp wet map if I went turbo.
Am I correct in thinking superchargers are better for low-end pick-up but turbos are better for top end power? Unless you get a small turbo that spins up quickly? But that then means you have less top end because the turbo runs out of puff at higher revs?
Would a (custom?) hybrid turbo be a way to get low-end pick-up but also good top-end?
If low-end grunt and tractability is important, a SC would seem the better fit if all of the above is correct and a custom turbo wouldn't give what's needed down low.
Would there be room to twin-charge as an option??
Could you consider increasing engine capacity through a bored-out block and oversize pistons?
Shout, shout. Let it all out. MX5's is what we're all about.
Crumpets: That's not a problem for me as the car isn't driven in winter hahaha For now i'm going to run without a cooler but always looking towards the next step
Apr 12, 2019 7:28:00 GMT
FFS Corders: It's been done a couple of times, can't think of one off the top of my head mind
Apr 12, 2019 17:55:33 GMT
JamesMk3: Is anyone on here doing JDM Combe this year?
Apr 15, 2019 8:29:56 GMT
FFS Corders: Jackyboy usually does, with the South West lot
Apr 19, 2019 19:28:54 GMT
Crumpets: I'm hoping to have my 5 ready by then
Apr 23, 2019 15:32:10 GMT
ecksjay: gonna try and go as i havent done a combe trackday in about 10 years, so kind of miss it
Apr 24, 2019 12:32:52 GMT
JamesMk3: I'll probably just go in public parking (for the first time in about 4 years!). At least then I can bail if the weather is crap. Not too sure o work commitments yet either. V. busy for the foreseeable future.
Apr 25, 2019 17:01:04 GMT
wannabe: Mission: Accomplished. Head now off and in for refurbishment
Apr 26, 2019 23:15:14 GMT
Zed.: today I bought an 'import' sized rear numberplate, naturally its too tall for the Eunos rear panel
May 9, 2019 15:05:09 GMT
Zed.: so i've got to cut it........
May 9, 2019 15:05:25 GMT
wannabe: haha If it's a faff and/or you fail, try Fancyplates - can order various sizes, or even specify legal minimum border around the letters!
May 9, 2019 18:23:36 GMT
Zed.: Ha. sorted now, had to trim ~10mm off the bottom! anyway. dropping car off for mot, expecting a fail as I've not looked at it properly.............. will wait to see how much extra work I've got to do next
May 10, 2019 8:01:05 GMT
Zed.: MOT passed & RFL paid, legal 5'ing now
May 13, 2019 14:55:45 GMT