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?
Been doing a little more research. Looks like a Rotrex C30-84 is the favorite & handily TTS are only 15mins from where I live....
whats the £ for hp cost likely to be? I'm guessing not cheap and how much could you offset with the sale of your existing setup? (guessing the m45, bracketry & pipework as you'd be able to re-use the rest of your setup?)
JamesMk3: Rear left wheel bearing replaced. What a saga. Can now hear noise coming from front right, and alignment is completely knackered. FML.
Jan 14, 2020 15:04:32 GMT
wannabe: I've had both front bearings replaced on the missus' car over the past few months and it's STILL making a droning noise... lol. Need to check if the mechanic actually replaced the correct one the second time I took it in!!
Jan 15, 2020 11:10:07 GMT
FFS Corders: Are the wheels straight? Buckles can cause a drone
Jan 15, 2020 11:41:07 GMT
wannabe: Hmmm... That's an interesting idea... no wheel wobble on the missus' car, which I would have thought was a strong indicator of being out-of-round, but I guess they could be bent side-to-side..??
Jan 15, 2020 14:34:13 GMT
wannabe: Ooooh, interesting - thanks, Howard. I'll have to get the tyres swapped round to see if it makes a difference! I will be most annoyed if it is tyres, seeing as they are only a few months old...
Jan 17, 2020 1:08:22 GMT
howardb66: If it is the tyres, don’t chuck them away, try getting them shaved.
Jan 17, 2020 12:04:28 GMT
wannabe: That sounds pervy haha.
Jan 18, 2020 18:27:11 GMT
fizbne: More build thread updating wow.
Jan 22, 2020 14:24:03 GMT
V6: I had an education in dampers today. I like expensive ones. Floaty, not bouncy for the win.
Feb 1, 2020 22:03:45 GMT
Zed.: that all depends on what you call 'expensive'
Feb 2, 2020 19:42:58 GMT