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Post by Rickster on Aug 23, 2019 8:22:38 GMT
Personally I'd repair & continue to compete the mk1, instead of spending on a diferent car couldn't you upgrade yours? my concern is that when you buy a secondhand car you are also buying someone else's problems  Rich. I agree with this and this is my preferred option, I think it is all about the regs, and yes, as we know in motorsport there are "interpretations" of the rules the trouble with the MX5 challenge is that it is fun, first and foremost, everyone has a laugh, lots of bants and so I wouldn't want to be "sneaky". you might then ask - why change anything, well, in my case, I am a faffer, part of the fun of a 5 is modding, changing stuff and trying to get the most out of a na car without spending ridiculous amounts of cash! i suspect when the 2020 season starts, I will still be in my little black 5, not going quite fast enough!😂 |
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Post by Rickster on Aug 23, 2019 8:29:31 GMT
There is one more point to consider - me!
Getting older and whilst my driving is getting better, I suspect my reactions are not what they once were and I am inconsistent.
I could buy a 2.5, and then be no more competitive, in fact it is quite likely that initially, whilst getting used to a car I would actually be slower!!😳
We've said it before - it's sooo much about the driver!!
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Post by Whistler on Aug 23, 2019 9:03:25 GMT
I used to work for a team in the 90s who ran a hidden brake bias adjuster inside the car of one series, and dry nitrous setup with lines running inside unused heater matrix hoses in another.  |
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Post by Zed. on Aug 23, 2019 11:05:58 GMT
you might then ask - why change anything, well, in my case, I am a faffer Know the feeling, have you read the thread in my sig  Rich. |
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jimb
New Here
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Post by jimb on Aug 23, 2019 12:22:05 GMT
@ Rickster and Binner
I think it is very easy to fall into the 'grass is greener in an XYZ' trap, whatever XYZ may be, but in reality there isn't much in it! Probably a good mk1 is better than a bad mk2.5.
In terms of the rules, as far as I can see you can do whatever you like to the engine, as long as it is an MX5 engine, and works with a standard ECU - you could in principle spend thousands within these rules, but it wouldn't mean you had any more enjoyment.
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Post by howardb66 on Aug 23, 2019 14:08:00 GMT
I think the problem is the regs for the championship. There should be a separate class for mk1 as there is for mk3. The first 2 years of the championship, I competed in my standard car for a few events, but was up against modified mk1s and mk2s, some with throttle bodies, some with aftermarket ECUs etc, and 2 litre mk3s. So I spent the winter and lots of dosh upgrading to a Blink stage 1, only to find that the regs changed that January, and no longer permitted aftermarket ECUs. So I haven't been able to enter the last 2 years, even though the mk3s are more powerful. Come & do Classic Marques. It’s a power to weight Championship so mods are allowed, you just have to make use of them! In the Mazda class, we have 2 NCs, 2 SC NBs, 1 NA on ITBs & a blink NA. Plus we get to beat the other cars because of the handicap algorithm. |
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Post by lowender on Aug 23, 2019 15:11:00 GMT
Come & do Classic Marques. It’s a power to weight Championship so mods are allowed, you just have to make use of them! In the Mazda class, we have 2 NCs, 2 SC NBs, 1 NA on ITBs & a blink NA. Plus we get to beat the other cars because of the handicap algorithm. I'll have a look into this. Bristol MC is also doing a 2 litre championship next season, 8 rounds, no FI, but other mods allowed as per S11, S12, and S14. bristolmc.org.uk/2020-bristol-two-litre-cup/ |
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Post by sandys on Aug 23, 2019 17:08:46 GMT
Zed. I could just be taking on someone else's problems it is always a gamble, though @rickster would then be the quickest mk1. I have already upgraded the dampers, aRBs, droplinks, bucket seat , aircon delete, rollbar, exhaust mani, exhaust mid and backbox. The only things left to do would be 4.7 diff and 15x7 wheels to replace the 15x6.5. . You wouldn't want to run 4.7 without the ability to rev to 8-9k  it is more or less equivalent to what I am running now that I have dropped a 6spd in, it is ridiculous and not ideal for Combe or any sprint track I reckon, grabbing 4 gears at clay and crystal palace for example and they are slow venues, good for hills perhaps, feels great on the road as you feel like you are hairing it everywhere but in reality you are just busy on the box and ultimately slow, feels nice and torquey though, good fun to drive. a 4.3/4.44 works well. I have been running a NA/NB 4.44 ring and pinion and it is lovely with the 5spd, going back to 4.1 for the 6spd though. Go and find yourself a nice 2.5 and enjoy a bit more power, what about an early mk3? |
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Post by sandys on Aug 23, 2019 17:09:14 GMT
Come & do Classic Marques. It’s a power to weight Championship so mods are allowed, you just have to make use of them! In the Mazda class, we have 2 NCs, 2 SC NBs, 1 NA on ITBs & a blink NA. Plus we get to beat the other cars because of the handicap algorithm. I'll have a look into this. Bristol MC is also doing a 2 litre championship next season, 8 rounds, no FI, but other mods allowed as per S11, S12, and S14. bristolmc.org.uk/2020-bristol-two-litre-cup/I was probably going to do the 2.0 litre cup next year, may also do CM, I started to do it the other year but bought a house and run out of money to play.  |
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Post by binner on Aug 27, 2019 13:40:53 GMT
sandys struggling to find a decent (ie not rusty) mk2.5 for the budget , probably the time of year. a mk3 had occurred however that will involve more cost as I can transpose seats, hardness, rollbar etc from the mk1. @rickster and @jmb all good points, Rich will you get any benefit from ground cams using the standard ECU ? lowender don't forget you can mess with aero as well in the 2 litre cup.
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Post by Rickster on Aug 27, 2019 19:07:28 GMT
Rich will you get any benefit from ground cams using the standard ECU ?
Yes, the oem cam profile is fairly gentle I believe.
So you do get some benefit particularly at mid - high rpm.
How noticeable, we shall see (if I do it)
No doubt adjustable sprockets, ECU etc would really make a noticeable difference I’m sure but that is neither, in rules or budget!
Also I’m waiting to see whether MX5 Challenge rules change for 2020, cam regrinds might be outlawed
Questions, questions!!!
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Post by Rickster on Aug 27, 2019 19:13:40 GMT
The other option is go to town on it and try Howard’s suggestion of the Classic Margues
Also I would like to do Gurston again
And Wiscombe
On sticky tyres
Aaaarrrrgh
Too much to think about🤔
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Post by dickie on Aug 27, 2019 21:13:48 GMT
An 80 or 100 thou head skim, port match and blend, port throttle body inlet,will give you gains for not much money.
You can re drill and peg camwheels to avoid adjustable pulleys if they are banned.
At 100 thou you are getting to the end of the cambelt adjustment, and will retard the cam timing as the belt gets shorter on the load side. ( due to head getting closer to crankshaft )
The 1800 runs rich at WOT so it should be within the ecu's capability, High output fuel pump should help too. And an adjustable fuel reg if the rules allow it.
Play Safe and don't cheat
Just a few ideas that might fit in the regs or might not !!
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Post by Zed. on Aug 27, 2019 22:15:13 GMT
The 1800 runs rich at WOT so it should be within the ecu's capability Ha. my 1600 runs rich everywhere & especially at top revs  so it's either buggered or has been fiddled with  Rich. |
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Post by Rickster on Aug 28, 2019 16:29:07 GMT
An 80 or 100 thou head skim, port match and blend, port throttle body inlet,will give you gains for not much money.
Already have 40 thou skim
I don’t think any sort of port work is allowed AFAIK
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it is more or less equivalent to what I am running now that I have dropped a 6spd in, it is ridiculous and not ideal for Combe or any sprint track I reckon, grabbing 4 gears at clay and crystal palace for example and they are slow venues, good for hills perhaps, feels great on the road as you feel like you are hairing it everywhere but in reality you are just busy on the box and ultimately slow, feels nice and torquey though, good fun to drive.
