I am in the process of a Auto-Manual gearbox conversion on my Nissan 300

 

I have made a thread about needing a clutch pedal but when I was asked turbo or non turbo I hit a brickwall and need some input

 

Its getting kind of complicated, and the person I bought the box off dident give me the clutch pedal, so I'm going to text him about that but I'm not relying on getting one from him

 

anyway the car is a 1995 Japanese Non Turbo Auto model, the gearbox is shot so its being replaced with a Manual gearbox which came off a turbo car , and is being fitted with a brand new turbo clutch and flywheel which matches up fine, however upon investigation it looks like the box is possibly a non turbo box that has been machined to fit a turbo flywheel as there are marks that suggest this. Therefore I have 2 questions;

 

Which clutch pedal do I need for this situation? non turbo or turbo? (I will text person I got kit off and ask if he has pedal, but if no luck I need to get elsewhere)

 

Also what shim spacing do I need to make my non turbo starter motor fit with the non turbo (but modified) gearbox and turbo clutch/flywheel

 

Thoughts greatly appreciated!

Short answer, it doesnt matter which clutch pedal. The slave is the same for the turbo and non turbos, just make sure you get a master that matches. The shim is around 5mm

Any reason you are using a turbo clutch and flywheel on an NA car?

The pedal ratio is different between the two pedals.

The NA pedal is designed to be used direct to the master cylinder.

The TT pedal is designed to be used with servo assistance.

.

There are less components in the NA system.

It is Pedal. NA master cylinder. fluid pipe and slave.

The TT system has a pedal , a servo, a different master cylinder, a vacuum tank and some associated pipes that come off the plenum..and the hydraulic pipe and slave.

Both work of course.

What you use might well be down to availability or personal choice.

 

As said if you use a TT flywheel n clutch on an NA gearbox casing some machining is needed.

Also a shim plate for the starter.

The easiest solution is to buy a ready made one. Its not expensive and its readily available.

All IMHO of course.

As said you can use either a TT pedal which uses a servo behind the pedal under the dash and takes a vacuum from the plenum and gives you servo assisted clutch to make it lighter to depress.

 

Or an NA pedal which won't give the servo assistance and therefore makes the pedal a bit harder to operate when operating a TT clutch. Some people use this setup and report that the pedal isn't overly heavy when using a stock TT clutch. This may be more of an issue if a clutch with a heavier pressure plate is used.

 

You don't need any of the hydraulic pipework under the bonnet that a factory Manual has. Just a pipe from the master to the

Slave.

 

Do yourself a favour and fit a new slave cylinder and either a new master cylinder or one which has been rebuilt with a genuine nissan rebuild kit. The cost of these parts a pennies and will give you years of trouble free clutch operation.

This may be more of an issue if a clutch with a heavier pressure plate is used.

 

Clutch pedal "feel/effort" is quite subjective.

I run an RPS Street Max TT clutch n fly on a non servo NA set up and its perfect (for me)

I dont like the soft feel of the TT servo assisted clutch.

I used an na pedal in my conversion only that I was unable to find a tt pedal,

ok clutch is slighty heavy to work but not overly I find it ok.

Thanks all for your reply's and very helpful information and advice, i will just see what pedal i can get and work with that, i do not mind if its a bit heavy

 

if anyone has one for sale or knows someone let me know, many thanks

For a contrasting view, I ran an xtd pressure plate on a TT clutch with a broken servo for a while and the clutch was crazily heavy. I'm no body builder but I'm not a pampered wuss either, and in light traffic my leg started to ache! My girlfriend could hardly push it. Refurbed servo from jimmer is one of the best things I've bought for my zed!

 

I don't know if that approximates an NA clutch or not and it will depend on the pressure plate but just my two cents.

Hello I’m new on here after buying a 300zx wide body the car was an auto but has had a manual conversion the clutch pedal is so stiff it is undrivable after reading some threads on here it seems the clutch needs vacuum assistance. There is a pipe coming through the bulkhead just above the clutch master cylinder but there is nothing connected to it. There is no vacuum tank so I presume I need one but where would I pick up vacuum from am I ok teeing into the brake servo vacuum hose ?

Thanks in advance for any replies and has anyone got the parts I might need.

Cheers david

Hello I’m new on here after buying a 300zx wide body the car was an auto but has had a manual conversion the clutch pedal is so stiff it is undrivable after reading some threads on here it seems the clutch needs vacuum assistance. There is a pipe coming through the bulkhead just above the clutch master cylinder but there is nothing connected to it. There is no vacuum tank so I presume I need one but where would I pick up vacuum from am I ok teeing into the brake servo vacuum hose ?

Thanks in advance for any replies and has anyone got the parts I might need.

Cheers david

The NA clutch pedal doesnt have a booster and is pivoted to make it easier n the foot, so you shouldnt need one unless your clutch pressure plate is mighty heavy. (I have a stage 3 clutch on my car with no booster and its fine to use).

 

You'll have to find a TT clutch pedal somewhere though it wont be easy as most are sold as part of conversion kits. Maybe its also the case that the slave cylinder is stiff or something causing resistance? Not sure.

Welcome to the club David. Hope you get that clutch sorted.

Hiya thanks for the reply, i think it has the tt clutch pedal as it has the booster at the back of it. There is a tube coming through the bulkhead that I presume I can attatch a vacuum hose to would I be able to just tee into the brake vacuum line that runs right past it ?

Thanks david

Hiya thanks for the reply, i think it has the tt clutch pedal as it has the booster at the back of it. There is a tube coming through the bulkhead that I presume I can attatch a vacuum hose to would I be able to just tee into the brake vacuum line that runs right past it ?

Thanks david

 

I don't see why not (correct me if wrong) but make sure it is past the brake check valve (it's under the bracket holding the pipe to the firewall).

Thank you I will give it a try

Best to Tee before and provide it with its own non return. That way if the clutch servo fails you won’t loose the servo assistant for the Brakes.

I actually went to the unnecessary but anal step of getting a Manual balance bar in the end.

Thank you

My car is now a fully working manual !

 

My car is now a fully working manual !

 

 

I would suggest getting a new Nissan gear knob, that one looks too small, should look like this>>>

 

Even better >>

 

where can you buy them jeff? I would prefer just all black and black stitching. The red one would suit yours!

 

the gearbox came with nothing so the one on there was a cheap solution from ebay so I could drive the car!

where can you buy them jeff? I would prefer just all black and black stitching. The red one would suit yours!

 

the gearbox came with nothing so the one on there was a cheap solution from ebay so I could drive the car!

 

Can be ordered through Nissan, part number is 32865-30P01 for black with black stitching, they are close on £100 these days though, cheaper in the US but the exchange rate and shipping cost will mess that up.

 

 

 

Jeff

Worth it though.

I found my red stich one brand new in california for £75 all in after shipping and duties.

 

Worth every penny.