I am going to have to get some advice based on numbers or experience for this one. . .

 

I have finished reshelling the body thanks to a great, wicked mean looking body kit from the zcentre in the UK, and after about 6 months graft it has finally been painted. Just doors etc to do now.

 

As that has come together nicely I managed to pick up a used engine from the guys at Nippon Auto spares in Derby to do the whole TT conversion thing. I know there are huge writers on this so I'm not going to bore you with the details suffice to say Holsett hx35's :)

 

Looking for something to beat a mates car running 395 PS / 390 bhp / 291 kW @ 6100 rpm with a curb weight of 1735 kg.

 

By my calculations that car will need to loose some weight if it wants to keep up with the Z!

 

Anyway I digress.

 

I am thinking about compression ratio's and boost, by running the con rods from a NA engine in the TT that's being built. This means the compression ratio on the TT will up from 8.5 :1 to 10.5 :1

 

This would mean it would need a tune that suited the higher compression and would run less boost but considering today's anti knock tech in premium fuels, do you think the detonation would be OK?

 

And would the engine survive? XD

 

Oh and obviously how much more power lol

At the end of the day it's all in the fueling. Choose your injectors and get a proper rolling road remap from someone like Greg @ Protuner.

 

Anti knock fuels won't save an engine that is running boost, mainly a more general purpose application to help engines and their change in driving environments.

 

I don't quite know why you want to raise the compression.

 

'A wicked mean looking body kit' and 'ZCentre' in the same sentence fills me with horror. :lol:

Edited July 21, 20178 yr by Funkysi

 

'A wicked mean looking body kit' and 'ZCentre' in the same sentence fills me with horror. :lol:

 

 

Jeff

I am thinking about compression ratio's and boost, by running the con rods from a NA engine in the TT that's being built. This means the compression ratio on the TT will up from 8.5 :1 to 10.5 :1

 

Stock NA and TT con rods are the same (same Nissan part #'s). The TT 8.5:1 and NA 10.5:1 compression ratios are down to different pistons.

Stock NA and TT con rods are the same (same Nissan part #'s). The TT 8.5:1 and NA 10.5:1 compression ratios are down to different pistons.

 

Indeed. All the same 30p rods.

 

Hope you have more success with Nippon than me, they sold me an NA lump instead of a turbo when I was too dumb to tell the difference. It didn't last long.

At the end of the day it's all in the fueling. Choose your injectors and get a proper rolling road remap from someone like Greg @ Protuner.

 

Sound advice thank you. I was thinking to go to hdev but maybe I will check protune out. Any ideas on a price for a chip tune ?

 

 

I don't quite know why you want to raise the compression

 

I was thinking there would be an 8 or 9% gain to be had from higher compression, with the obvious danger of tuning as standard turbo boost of severe engine explodation!

 

It'd be running less boost but higher compression. (I think I need to change the title of this entry now)

A wicked mean looking body kit' and 'ZCentre' in the same sentence fills me with horror.

 

 

Uh oh what have I done wrong? They're not shitly made are they? No past comparison experience unfortunately. Was a b×××c to fit tho.

 

So back to the original question of there being more compression, I was under the ASSumption the con rods wereally longer and thats the compression difference. Now I feel like a plumb.

 

Obviously then the NA pistons can't be used.

 

 

OH and Steven, yes I did, you could say that. How much did they sell the NA for? Hope it wasn't over 400?

 

But rest easy my friend I have had the last laugh. I have bought from them a vg30dett that looked rusty and dirty, was on a pallet at the back of the warehouse, in pieces. Persuading them it was junk, and to be sold for 280 quid minus the turbos.

 

However I saw something they didn't. . . .

 

Brand New pistons, con rods and con rod bearings, and a new timing kit - pulleys, and tensioner and oem belt!! Haha 280!!

 

Looks like they are on something down there!!

 

Hope that cheered you up.

It's a long story....

 

NA Pistons stamped 30P, have raised top. Like a Jaffa cake.

TT Pistons stamped 30P1, have a dished top. Like a bowl.

Thanks for the info, it'll be the oil chanel as well then.

 

So what about ZCentre body kits? Peeps ain't zworld fan boys?

I think it's more the styles of what's on offer.....they ain't what you'd call 'attractive'. That's obviously subjective, but most folk don't like the look of an Austin Maxi for example.

Thanks for the info, it'll be the oil chanel as well then.

 

So what about ZCentre body kits? Peeps ain't zworld fan boys?

 

Yes there is a difference in the oil squirter too, TT it squirts up in the Pistons. Good move on the TT lump. Looking forward to the Holsets, I've toyed with them myself or a single HX40.

Thanks mate, i knew the oil trees and pistons were different i thought the length of the con rod provided the higher compression, i just thought the tt pistons were slotted for oil flow and shaped diffetently. Was going to take the tt pistons off the tt engine anyway.

 

I bought the NA with the longterm goal of having the better diff, no hicas, and stronger prop shaft, and was looking to build the tt engine whilst the NA was still running, but took the engine out to respray the car and engine bay. Looks better but hey how the car was still off the road for 6 months. Got all new trims tho so it should be looking slick!

 

 

Any idea on a price for a chip and tune?

 

And also what's with the ZCentre body kits?

https://ibb.co/hWsSs5

 

Pics above

https://ibb.co/jsC5ek

 

And another

https://ibb.co/m0W95Q

 

Engine bay

 

- - - Updated - - -

 

What's with the body kits from the zcentre?

[ATTACH=CONFIG]107632[/ATTACH]

 

Jeff

 

As above with the body kit's?

As above with the body kit's?

To put it lightly, Si has a certain *distaste* for loud bodykits.

Ah I see so I'm glad it's not a quality thing then. Thanks for all the info everybody, Andrew G, Stephen and Alic for finally answering the body kit question!!

 

Thanks guys very useful information on this forum, does it cater for Stageas and GTRs too? As that would be useful. I'll have to search .. .

 

Thanks!!! :thumbup:

Hi & good luck with your build! Welcome to the z world.

There are several forum members who are very passionate about keeping their Zeds original.

To say the least they are very fine examples but there are other Zeds that have been tastefully moded

It is all down to the owners choice at the end of the day

Hope to see you with your z at the meets!