|
|
Post by howardb66 on Apr 30, 2019 19:35:22 GMT
So, I need more POWER.
The SC’d car drives really well, is pretty reliable & I like the noise.
Am I going to muck things up going turbo?
As far as I can see I need to swap manifolds & downpipe, fit a turbo, plumb in the existing intercooler, get nick to map it & Bobs your uncle....
Anyone gone this route?
|
|
|
|
Post by atlex on Apr 30, 2019 22:05:21 GMT
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 wannabe on Apr 30, 2019 23:16:32 GMT
You could twin-charge it if you're feeling brave...  lol |
|
|
|
Post by niklas on May 1, 2019 8:25:07 GMT
As long as you either keep it around 230hp or makes the supporting mods you'll have no problems. Going to track stage 8 hardware is good.
There is a reason most conversions you see are rather mild.
Edit: for hill climb I'd probably be looking at rotrex. Large enough and you can get turbo top end with an easier time on throttle transitions. Low end torque is the trade off.
|
|
|
|
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
Russell
|
|
|
|
Post by howardb66 on May 13, 2019 11:56:43 GMT
Ah, now a Rotrex might be a good option. They’re a lot of £ though.,
|
|
|
|
Post by Vindi (Russell) on May 14, 2019 22:16:39 GMT
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? Russell. |
|
|
|
Post by howardb66 on May 15, 2019 9:18:45 GMT
Hi Russell
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.
Any constructive ideas greatly appreciated!
|
|
|
|
Post by wannabe on May 15, 2019 9:53:24 GMT
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?
Would some custom cams be possible?
|
|
|
|
Post by Zed. on May 15, 2019 10:45:33 GMT
|
|
|
|
Post by wannabe on May 15, 2019 11:44:32 GMT
Did I just hear the words 'LHD conversion'?  lol |
|
|
|
Post by howardb66 on May 15, 2019 13:47:24 GMT
Thanks for that Zed, just killed 2 hours!!!
|
|
|
|
Post by howardb66 on May 30, 2019 12:04:22 GMT
Been doing a little more research. Looks like a Rotrex C30-84 is the favorite & handily TTS are only 15mins from where I live....
|
|
|
|
Post by Zed. on May 30, 2019 12:14:27 GMT
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?) Rich. |
|
|
|
Post by howardb66 on May 30, 2019 14:01:49 GMT
Looking at about a 50hp increase initially & I recon it’ll be about 2.5k, as you say I could sell off the M45+mounts+3D printed recirc kit etc.
|
|
lol
lol
