MX-5 Tuning
Author
Discussion

swansea v6

Original Poster:

1,282 posts

246 months

Sunday 28th January 2007
quotequote all
I have just decided its time to tinker with my mark 1 mx-5, im not looking for massive power gains but just a little more oomph and maybe sharpen up the handling. Are there any "must do" mods first? I have the car booked in for a stainless steel exhaust next week, with the guys at longlife. I will also be fitting a decat pipe at the same time, aswell as a pipercross induction kit with sufficient cold air pipes.
Is it worth looking at a performance manifold??
Regarding the suspension it already has blistein shocks and strut brace as standard. So im thinking of poly bushes all round and maybe new shocks and springs, as the car has covered 60000 miles? any other ideas? I dont want to go to mad money wise because im saving for a turbo conversion next year.........

robbieduncan

1,993 posts

257 months

Sunday 28th January 2007
quotequote all
I have a much newer 5 an don't have this option but on your car a more free-flowing exhaust manifold should get you around 10 bhp straight away. Mazda sorted this on the later cars but on a Mk1 it's an obvious choice.

swansea v6

Original Poster:

1,282 posts

246 months

Sunday 28th January 2007
quotequote all
Really? 10bhp? is the manifold that restrictive??

swansea v6

Original Poster:

1,282 posts

246 months

Sunday 28th January 2007
quotequote all
how much will i gain with just the decat fitted? 1-2bhp?

robbieduncan

1,993 posts

257 months

Sunday 28th January 2007
quotequote all
swansea v6 said:
Really? 10bhp? is the manifold that restrictive??


So I've heard. Was just trying to get some info from google but couldn't find anything. No idea what you'd get from a de-CAT, but you might fail your MOT!

swansea v6

Original Poster:

1,282 posts

246 months

Sunday 28th January 2007
quotequote all
just checked with my local mot centre and because it is a 93 eunos model they have to test it as a non cat car. Mainly because only the mx-5 is on their records not an eunos...... so see ya cat!!!!

steve bowen

1,268 posts

245 months

Sunday 28th January 2007
quotequote all
Get a set of GAZ shocks if you think the suspensions a bit tired :-

www.mx5mad.com/product_info.php?cPath=26_41&products_id=209

don't bother wasting money on manifolds & air filers if your saving for a turbo as you'll only have to take them off to be binned when you get the turbo kit.

I went for the BEGI street turbo 3 I/C 2 kit :-

www.mx5mad.com/product_info.php?cPath=26_36&products_id=215

its very comprehensive.

DocJock

8,722 posts

261 months

Sunday 28th January 2007
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So why did Mazda officially sanction the BBR turbo and sell their own turbocharged v2.5 rather than supercharge it if they are so much better?

DocJock

8,722 posts

261 months

Sunday 28th January 2007
quotequote all
I'm not arguing the case for turbos LA.

I will probably supercharge my wee car because I already have a turbo-nutter Jap shed, so the contrast appeals to me.

I just found it a bit of an anomaly, that's all. Thanks for the info.

swansea v6

Original Poster:

1,282 posts

246 months

Sunday 28th January 2007
quotequote all
some good advice cheers, just been out for a blat, with the roof down, and was wondering hom much fun the mx-5 would be if fitted with either the 1.8/2.0 or 2.5 v6 (from mx-3/mx-6), imagine the roar of that v-6 with the roof down.......

slinky

15,704 posts

270 months

Sunday 28th January 2007
quotequote all
swansea v6 said:
some good advice cheers, just been out for a blat, with the roof down, and was wondering hom much fun the mx-5 would be if fitted with either the 1.8/2.0 or 2.5 v6 (from mx-3/mx-6), imagine the roar of that v-6 with the roof down.......


Imagine the roar of this with the roof down...



evildrivingevil

slinky

Pierscoe1

2,458 posts

282 months

Sunday 28th January 2007
quotequote all
hmm... slinky, you've posted about that car a couple of times now.. do I see dreams of the UK's first LS1-MX5 on their way !?!!?!?

LA.. about that 2.3, isn't the turbo'd motor in the Mazda3 MPS, and Mazda6MPS a 2.3 ?? hmmm.. that'd make a fantastic mx5!

slinky

15,704 posts

270 months

Sunday 28th January 2007
quotequote all
LS-1, LS-7.. hey, who knows...

6 numbers first might not hurt though!!

I've been toying with the idea of a V6 from the MX3 though... but I toy with many many silly ideas, Hodgy and I have already got plans for a procharged SBC 5 (500hp plus)...

Doesn't mean they'll come to fruition though!!

slinky

15,704 posts

270 months

Sunday 28th January 2007
quotequote all
Los Angeles said:
Had a shot in a Monster Miata and it was like driving a bus - and boy, did it hate going around corners.


Corners aren't an issue, it's steer from the rear

redgriff500

28,982 posts

284 months

Monday 29th January 2007
quotequote all
Hmm...

I really fancy the 3ltr Jag S type engine and box...

Good power and reliable...

But I have been offered my old 4.2 320bhp rover engine and box back...

But i really ought to move house... or at least finish my other projects !

cptsideways

13,808 posts

273 months

Monday 29th January 2007
quotequote all
slinky said:
swansea v6 said:
some good advice cheers, just been out for a blat, with the roof down, and was wondering hom much fun the mx-5 would be if fitted with either the 1.8/2.0 or 2.5 v6 (from mx-3/mx-6), imagine the roar of that v-6 with the roof down.......


Imagine the roar of this with the roof down...



evildrivingevil

slinky



Oooooooooooooooooooooh

mx-5 lazza

7,954 posts

240 months

Monday 29th January 2007
quotequote all
As has been said, don't bother spending anything at all on performance mods if you are saving for a turbo.
And if you are having a stainless exhaust fitted, make sure it's at least 2.5" so the turbo spool-up won't be restricted.

Also, I'm pretty sure that a header won't give 10bhp on any na MX-5. You might find 3-4bhp if you're very lucky which isn't a good return from around £500. If you're supercharged to around 200bhp then a free-flowing header might gain 10bhp but not na.

A lot of rubbish is spread about na power mods but the fact is that it's hard to get any significant gains without a serious amount of money being spent.It can make the car sound much better and hence feel better but the dyno will show that there isn't actually any significant gain.

Full free-flowing de-catted exhaust & manifold - around £1000 - 5bhp?
Induction kit - £60ish to £+350 - no power gains recorded on any dynos I've ever seen, not even with the JRCAI which is about the most expensive and most highly regarded kit. In fact ALL mx-5's I've seen with an induction kit on a dyno have lost power! Mazda spent a lot of time and effort on the standard induction system (have you looked closely at it?) and did a good job of it apart from it being too quiet.
Gas-flowed head with ports matched to intake-exhaust manifolds + valve job - £lots - 5-10bhp?
Individual throttle bodies - £loads more - Not sure if this gives any more power at all either (but it does sound glorious).

Alternatively...
Cheap turbo/supercharger - £1500 - £2000 - £50bhp.

It's a no brainer really unless you are really into tinkering and have money to burn.