Which clutch for 11psi boost?

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gslender
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Which clutch for 11psi boost?

Postby gslender » Tue May 01, 2012 9:46 pm

Hi,

What clutch would you recommend for a NA6 1991 that is boosted with about 11psi and has the stock 5 spd and running gear.

Want something that is suitable for this and no more as I won't be going past this level in terms of boost etc. Anything that is close to stock feel would be great.

Keen to buy a kit or set that has everything I need to replace it, and nope I've not done this before, so hoping it is easier for a capable wrench monkey to tackle.

G
MX5 91 NA6 LE completely stock and loving it!
MX5 92 NA8/ITBs Silver "aka Track Beeotch"

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Dweezle
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Re: Which clutch for 11psi boost?

Postby Dweezle » Tue May 01, 2012 9:55 pm

I used a Xtreme hd.
Was about $260 for the kit and has stock feel but held 10psi.


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Novice1
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Re: Which clutch for 11psi boost?

Postby Novice1 » Tue May 01, 2012 10:42 pm

I have a nicks clutch and run 18 psi.
cheers novice1

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Re: Which clutch for 11psi boost?

Postby spikes » Tue May 01, 2012 11:30 pm

Does anybody know how much power an Exedy Sports Tuff clutch for the NA6 can hold?

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Re: Which clutch for 11psi boost?

Postby NitroDann » Tue May 01, 2012 11:36 pm

More than you can afford pal.

Ferrari.

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gslender
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Which clutch for 11psi boost?

Postby gslender » Wed May 02, 2012 9:06 am

Novice1 wrote:I have a nicks clutch and run 18 psi.
cheers novice1


Sorry, what's a nicks clutch?

G
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Re: Which clutch for 11psi boost?

Postby Hjt » Wed May 02, 2012 9:45 am

Smoke him.

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Novice1
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Re: Which clutch for 11psi boost?

Postby Novice1 » Wed May 02, 2012 11:50 am

gslender wrote:
Novice1 wrote:I have a nicks clutch and run 18 psi.
cheers novice1


Sorry, what's a nicks clutch?

G

Nicks clutch service archerfield brisbane, google it. My old clutch which had a 1750 lb pressure plate gave up the ghost.
Cheers Novice1

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zossy1
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Re: Which clutch for 11psi boost?

Postby zossy1 » Wed May 02, 2012 2:21 pm

ACT Stage 1, or an FM stage 1. I run an ACT myself and am very happy with it - only slightly firmer than normal, doesn't get difficult in traffic, and holds the power without a problem.

They are expensive - but you get what you pay for.

You will not need a 6 pad, 4 pad or button clutch running 11psi.

Have you considered moving to a 1.8L flywheel and clutch combo? Might be a good time to upgrade.

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gslender
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Which clutch for 11psi boost?

Postby gslender » Thu May 03, 2012 3:40 pm

zossy1 wrote:Have you considered moving to a 1.8L flywheel and clutch combo? Might be a good time to upgrade.


What's the reason behind going to a NA8 flywheel?

G
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zossy1
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Re: Which clutch for 11psi boost?

Postby zossy1 » Thu May 03, 2012 5:43 pm

gslender wrote:What's the reason behind going to a NA8 flywheel?

G


Bigger clutch, bigger pressure plate, holds more power. 1.8L clutch does not fit 1.6L flywheel so if you change to 1.8L spec you must change both clutch and flywheel together.

On the downside, the stock 1.8L flywheel is a bit heavier, but this isn't much of a problem and can be solved with a lightweight flywheel such as a Fidanza or Racing Beat. I run a racing beat myself and it's great.

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gslender
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Which clutch for 11psi boost?

Postby gslender » Thu May 03, 2012 8:12 pm

zossy1 wrote:
gslender wrote:What's the reason behind going to a NA8 flywheel?

G


Bigger clutch, bigger pressure plate, holds more power. 1.8L clutch does not fit 1.6L flywheel so if you change to 1.8L spec you must change both clutch and flywheel together.


So bolts straight up with zero problems or other changes etc? Mates to the NA6 5spd no problem etc?

G
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MX5 92 NA8/ITBs Silver "aka Track Beeotch"

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timk
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Re: Which clutch for 11psi boost?

Postby timk » Thu May 03, 2012 8:32 pm

It has a fair bit of weight on the outmost part of it though which gives it higher rotational inertia. The NA6 flywheel is a better design if you can get a clutch up to the task.

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zossy1
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Re: Which clutch for 11psi boost?

Postby zossy1 » Thu May 03, 2012 10:53 pm

Bolt-on fit, though as Sab says it is heavier. Like I said before though, a good alloy flywheel fixes that problem.

Depends on how much power you're thinking of pushing in the end.

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gslender
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Re: Which clutch for 11psi boost?

Postby gslender » Sun May 06, 2012 1:28 pm

Ok, so I'm thinking the Exedy HD for the std NA6 should be good enough for where I am on the power spectrum (I'd be stunned and stoked if I was near 200bhp at the flywheel) and that's the limit as far as I'm concerned.

So my next decision is to decide if I'll do the job myself, or get MX5 Plus to do it.

I'd like to have the rear main seal and consider swapping my old crunchy 5 spd for another 5 spd (with less crunching).

I've not tackled this before, but have 2 workshop manuals, plenty of good tools and garage space, plus I don't rely on the car as a daily drive.

On the other hand, it seems there are plenty of areas where I can go really wrong if I'm not careful, and don't want to tackle something that for $300 I can get a professional to do it.

I may call MX5 Plus on Tuesday to get their view on job estimate and when they'd next fit it in if they were taking it on - plus I can chat to them about the clutch recommendation and gearboxes they have to fit.

Thoughts?
MX5 91 NA6 LE completely stock and loving it!
MX5 92 NA8/ITBs Silver "aka Track Beeotch"


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