Turbo and tuning set ups

[Cbray2003]

Hi there people I'm really after ideas in wat is the best set up to get a gd power out put and still use as a daily car cost not a problem but not shore wats best as want to do it so bay looks nice aswell as car has started goin to shows now


I'm thinking gear box mount turbo and a 11mm pump but wats the best turbo to put with it and wats a gd boost in psi as I looked at a 27 psi t3/t4 but not shore really wat the engine will take on stock internals

Any pics and advise welcome thanks

[Mattcheese31]

read the XUD section mate . . . . .then come back with some more informed questions . .

[Mal]

T3/T4 won't see peak boost till about 4k RPM, made worse as it's gearbox mounted..... Then yer out of puff :p

[silverzx]

You want a T4 and a 12mm.

[Cbray2003]

Ok fair enough wats a gd turbo to run with an 11mm pump then

[silverzx]

Ok fair enough wats a gd turbo to run with an 11mm pump then

9mm = T2.
10mm = T25.
11mm = T3.
12mm = T4.

[Jonny81191]

Ok fair enough wats a gd turbo to run with an 11mm pump then

9mm = T2.
10mm = T25.
11mm = T3.
12mm = T4.

^what?

a T4 and 12mm would be nigh undriveable, and there's no reason not to run a T25 and 11mm..

Either just do the norm and run a TD04 and 11mm with a FMIC, you'll see up to 180BHP on a good setup,

OR

Go out and do some research into stuff people haven't used yet, it's a fairly easy learning process to grasp the basics and people will be much more likely to help you if you ask well informed questions..

[Tom]

Stick with a 9mm and get your turbo sorted first, then as you tune you'll learn and then you'll know when you need an 11mm :p

[Cbray2003]

Ok yea that's brill ill do abit of looking around at setups and things and go from there and just wondering wat type difference will I get changing from a Lucas to a bosh pump

[silverzx]

^what?

a T4 and 12mm would be nigh undriveable, and there's no reason not to run a T25 and 11mm..

Either just do the norm and run a TD04 and 11mm with a FMIC, you'll see up to 180BHP on a good setup,

OR

Go out and do some research into stuff people haven't used yet, it's a fairly easy learning process to grasp the basics and people will be much more likely to help you if you ask well informed questions..

I was joking dude!

[Cbray2003]

Lol

Ok then is then any benifits of a gear box mounted turbo or not

[ginge191]

Looking bad ass?

[silverzx]

You only really need it if the turbo(s) won't fit down the back.

[Tom]

Both of the above are entirely correct!

[strictly_perv]

It's not worth the effort of relocating the battery, extended oil line/return, making the mani, making the down pipe ect unless as said the turbos too large which won't be nessesary for an XUD and what they can realistically cope with or unless the turbos a VNT.

[Jonny81191]

I was joking dude!

[Cbray2003]

Ok that's a big help ill have to sort a turbo out and go from there c wat I come up with

[jamie23]

ive just got standard t2 and bosch at 28 psi and thats fine for me pulls well imo

[Cbray2003]

Wats a safe psi I can put into engine without problems

[silverzx]

Wats a safe psi I can put into engine without problems

PSI doesn't mean anything.

A tiny GT15 pushing 40PSI isn't equal to a TD04L pushing 40PSI.

As a rule of thumb the bigger the turbo, the less PSI you need to run for similar power then smaller turbos.

So not exactly correct but a T2 running 26 PSI might be equal in terms of power to a T25 running 16 PSI. Obviously the power delivery is going to vary turbo to turbo and pump to pump (amongst other things).

[Cbray2003]

Ok that makes sence

[Mal]

Wats a safe psi I can put into engine without problems

It's how much CFM the turbo can flow and it's P/R rather than how much pressure it can produce. More flow is the way to go

[Cbray2003]

Oh ok fair enough I always thought a turbo was a turbo but as can see I'm wrong

So I'm thinking a 11mm bosh with possible vnt on gearbox with fmic and bck to a xantia manifold is this goin to be a gd setup if done wright thanks

[Tom]

If done RIGHT, it would be great.

How are you thinking of controlling your VNT?

[silverzx]

No disrespect intended but you don't sound like you know anything.

Stick to a 9mm and whatever turbo you already have on and go from there.

Play with the 9mm, get a feel for tinkering with the pump and turbo, get all your gearbox, exhaust etc sorted out then consider bigger turbo/pump.

[Jonny81191]

No disrespect intended but you don't sound like you know anything.

Stick to a 9mm and whatever turbo you already have on and go from there.

Play with the 9mm, get a feel for tinkering with the pump and turbo, get all your gearbox, exhaust etc sorted out then consider bigger turbo/pump.

^this. 100%

[Cbray2003]

I know where u coming from I've had three d turbos and played with them all and I've been brought up messing with stuff on engines and I also have a tractor puller I've built up and played with so got big turbo and the rest on that but just trying to get a better idea about the car before start as don't wanna wreck that if u get me and I'm not shore about the vnt control yet wat would u surjest be best for it

[simonh]

I've never quite got my head around the pressure/ volume thing and may be about to look a bit stupid but......if the area being filled (pipework, intercooler etc) is the same size and the pressure is the same with any two given turbos say, K14 and TD04, then I'd have thought the volume would be the same?

I know the TD04 would be producing more power but I always though this was because the air would be much cooler as the turbo wouldn't be spinning so fast to generate the same volume. Is it that the increase in temperature with a small turbo is causing a smaller volume of air to expand which is causing the pressure to be the same?

Is this on the right lines or have I missed something obvious? I was thinking that a small turbo (T2) with a really good twin pass intercooler would be the best solution for me as it would give minimal lag but sensible power up to the point that the turbo becomes a restriction in the exhaust.

I'm not looking for power levels where I'm approaching the breaking point of components (other than cheap, standard turbos!) but am now wondering if a bigger turbo running at lower psi would be a better solution or if it would be too laggy. While I'm going over potentially old ground anyway is it worth changing from a K14 to a T2 or is there no noticeable difference?

[Cbray2003]

That's how I'm thinking it is a confusing thing to be honest

Also would a gearbox mount have more lag than down the bck where it should be as it's got longer to travel between engine to turbo just a thought just thinking simply ATM and it makes sence if it's wright

[padge]

im running a TD04 gearbox mounted, but im yet to drive it, get some decent quality exhaust heatwrap on the manifold/downpipe to keep the hot gases in and flowing as fast as possible.