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And I've just fixed some of the images as I'm a bit slow and the file extension was in capitals on some of them when I uploaded them to my web server 
Project log: MK2 MX5 Turbo - Now with 300bhp
- Thread starter Frozennova
- Start date
Slightly relevant and quite interesting video. Seems pretty amazing that the ethanol completely eliminated the knock limitation, very low boost though, I wonder what the result would be at 250kPa.
How does the meth mix compare to E85?
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Very similar story unless you're running big big boost on a big compression engine you'll generally find MBT before det on E85 (I assume you're talking 250kPa absolute I.e 150kpa actual boost). I don't think M20 would completely eliminate the limited but it would move it further away.
Although it's more complicated than that (Explanation in the link below) because while both can tolerate more ignition advance and/or boost you actually need less timing with Methanol to reach MBT.
Article test was done with 100% methanol and I only stumbled across it yesterday so haven't done any digging to find out how that translates when you are using it as a 20% blend with pump fuel
https://grassrootsmotorsports.com/articles/fuel-truth/
E85 vs M20 + Vpower very similar Octane rating (E85 ranges between 102-105 depending on what the actual ethanol content is as it varies quite at bit at the pump)
E85 will need a bigger fuel system due to a stoich value of 9.8:1 compared to 13.06:1 with an M20 blend (Assuming the E85 is actually 85% ethanol)
Final two things to consider are latent heat of vaporization and BTU/lbs of both blends which I can work out properly later if you want me to go that in depth.
Caporegime
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There's a lot of body roll.. coilovers time?
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@Clarkey
Just knocked together a couple of tables that illustrates the energy and latent heat differences between fuels
In short, more energy in the methanol mix, it needs less ignition advance than E85 to reach MBT and less fuel is consumed. E85 will remove more heat from the cylinder though
Bilstein Dampers and Eibach springs (Possiby ARBs too) is the plan. It'll cost the same as mid range coilovers, and perform better.
Just knocked together a couple of tables that illustrates the energy and latent heat differences between fuels
In short, more energy in the methanol mix, it needs less ignition advance than E85 to reach MBT and less fuel is consumed. E85 will remove more heat from the cylinder though
Bilstein Dampers and Eibach springs (Possiby ARBs too) is the plan. It'll cost the same as mid range coilovers, and perform better.
Caporegime
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Arbs will make an appreciable difference.
Look out on eBay for under braces as well thwynhelp to tighten things up. Intact upper front and rear too.
Look out on eBay for under braces as well thwynhelp to tighten things up. Intact upper front and rear too.
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Its a 1.8 so it comes with additional underbody bracing and has a front upper brace on it already. I'm not sure the benefit per £ is worth the money on Frame rail reinforcements or butterfly braces though
I fitted P5 frame rails to my mk2 RS and tbh didn't notice a huge deal of difference. They work better on mk1s. I've got a mk2.5 sport gearbox butterfly type brace in my garage you can have if you cover postage costs, I've sold mine so don't need it anymore.
Bilstein B14s are great if you fancy splashing out on some good coilovers, more expensive then GAZ or Meisters but, IME, worth the extra cost.
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Thanks for letting me know on the frame rails, saves me wasting money. Let me know how much postage is on the Postage costs for the butterfly brace, I'll chuck in a couple of beer tokens too.
B14s are quite a bit more than I want to spend., but I don't particularly want Meisters either.
Id focus efforts on the chassis rails first before it snaps in half
Being done in November, and besides chassis rails only covers the front third of the car
No problem. Will check postage over the weekend when I'm back home. Also it's actually this brace, not the gearbox one:
http://www.autolinkmx5.com/brace-bar-rear-chassis-mazda-mx-5-mk25-vt-sport-n02628e90a-5421-p.asp
Will double check if I've still got the gearbox one too.
B14s get overlooked due to the higher price and lack of damping adjustment, but they just work all the time, be it on road or track
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Much appreciated.
I'm not fussed about damping or height adjustment, I want something that's going to work well on track but still be compliant down the typical british B road (I have plenty of them on my doorstep)
The B14s offered me just that. I got AK Automotive to set the ride height with the wishbones parallel to the floor and then set the wheel alignment and that was it. Everything I threw at it it just lapped it up. It rode well on the road, better than my fiancee's daily (Abarth 500 then Alfa Giulietta) and my dad's e92, and at the same time was better on the track than my mates and my brothers 5s running GAZ Gold Pros.
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Went to Santa Pod on Saturday. Good day, with plenty of people turning up, spent most of the day missing shifts but managed to muster a good enough run to come home with wood
Fastest Turbo and Fastest NB
Fastest Turbo and Fastest NB