Dans Turbo Build

[dan944]

Return fuel rail with a RRFPR is on the list. Then I may think about tweaking maps myself....maybe.

[1979scotte]

Boost is boost. Even 0.25psi is still more than stock. So you're probably at about 155 hp or so. Enough to notice. And the way it is delivered makes it more noticeable.
Just wait until it's mapped. It'll blow your socks off. And with the 630cc injectors, you're good to push 10.5psi all the way to the redline. Good times ahead!

Would you push 10.5 psi on Helen's?
I don't think I would have done it on mine. Not at max RPM.
What's the most boost a stock 1zz has survived?

Helen's is built to run 10.5, but it tails off at higher rpm.
The injectors (440cc) don't flow enough to be able to hold that boost up the rev range on a returnless fuel line.
Just think, on a returnless line, 43.5psi fuel pressure is reduced to 33psi at 10.5psi boost. So, that's a fair bit of fuel it ain't gettin.
Helen could opt for a return fuel rail and then boost can be maintained throughout the range, but she doesn't want that much power anyway. I would

I am going to wait for you guys to run 10.5 psi at redline for a few months before I try doing that with my 1mz.
If 1zz rods can take it mine should too.
A rising rate FPR and bigger pump are on my eventual to-do list.

[shnazzle]

Actually you reminded me, the rods can't take it, another reason why boost tails off

[dan944]

Then I'll be railing mine off lol.

[shnazzle]

I just realised something... What made you go for 2554r over the 2560r/gt28?

[dan944]

2554?

Because I was told to.

Better spoil up speed and still get the power I want.

Please tell me that's correct because i don't think I can return it now. Lol.

[shnazzle]

No no that's fine, you chose well.
Just that the spool difference is so low at 7-10psi and the 60 allows for a bit more power (if you ever fancied it) and runs a bit cooler.

2554 is a very solid choice

[dan944]

Ahh. Well I would recommend this one in the future then. Haha.

Just been looking at a suspension refresh. Feeling very guilty with my 95k dampers.
I feel a big pay out is imminent :/

[1979scotte]

I just realised something... What made you go for 2554r over the 2560r/gt28?

It's cheaper.
Spools quicker.
Makes more power than he specified.

Pretty much then same size as the TTE turbo but with ball bearing cartridge and more modern turbine design.

If an Sp240 makes 235 with a tb2559 30 year old design this is going to pass that with ease. Imho.

[1979scotte]

Ahh. Well I would recommend this one in the future then. Haha.

Just been looking at a suspension refresh. Feeling very guilty with my 95k dampers.
I feel a big pay out is imminent :/

Mate you are kidding me.
You've forked out for a turbo without a suspension refresh.
Like who does that. EVER!

Me actually although I would advise against it.  :withstupid:

Reliability then handling than power which then invariably means you have to re address the other 2  (:< >

[dan944]

Bracing and brakes are all sorted. I have tte springs but standard shock which look in good nick and handles well. I have a full polybush kit that I'm slowly replacing as I take stuff off.

After reading that other thread it got me thinking about my shocks. I don't have a history on them :/. Could be time for a change.

[shnazzle]

I just realised something... What made you go for 2554r over the 2560r/gt28?

It's cheaper.
Spools quicker.
Makes more power than he specified.

Pretty much then same size as the TTE turbo but with ball bearing cartridge and more modern turbine design.

If an Sp240 makes 235 with a tb2559 30 year old design this is going to pass that with ease. Imho.

Was just curious as to the reasoning is all. As I said the spool difference is negligible (on paper) and it's more efficient across the same range of power.

Also curious as to the power goals long-term. The way Dan is going, I can see a similarly effortless inclined to 280ish hp, which the gt28 is right in the money for.

I would go for gt2554r as well I'd only go bigger for a sexy BW EFR dem tings be sexy as f00k

[1979scotte]

EFR come with all the bells and whistles.
Bit more expensive than what Dan has bought.

[dan944]

Just looked at the efr. It's pretty sexy.

What model is belt suited to the 2.
6758?

Just looking at these and for future reference. It's a straight swap.

[1979scotte]

Just looked at the efr. It's pretty sexy.

What model is belt suited to the 2.
6758?

Just looking at these and for future reference. It's a straight swap.

Whatever the smallest one is.
I think they come with the same flange.

[dan944]

Fair one. That's on the long term list

[shnazzle]

It's an incredible bit of kit. And the built in boost actuator and stuff is just showing off.

Probably wouldn't spend that much on a turbo for the 2 mind. I think it warrants a 10k+ stock car for it to not make yoy cry

[dan944]

Haha. True but £1200 including solenoid,recirc valve and what I assume will be a rapid spool?
That's tempting. Lol

[1979scotte]

Haha. True but £1200 including solenoid,recirc valve and what I assume will be a rapid spool?
That's tempting. Lol

I seem to remember people saying they were torque monsters so the gearbox could be an issue.
It's between a 6258 and a GTX2** for a built 1zz money no object

[shnazzle]

Dan. Prompted by your sale thread it got me thinking and looking at your install again...

You like the BMC and it is a carbon box, which is great against heat soak.
So... Have you considered the MASSIVE space behind the driver's rear light? The BMC should fit in there easily and makes it much easier to clean. The only issue might be the pipework.

Potentially saves a lot of exposed pipework going through the hot engine bay.

[dan944]

Hmm,, I'd have to have a look again. I think I did consider this. I can't remember trying to fit it in though.

The issue is that I'm already running boost pipes through there which makes it tight.

The pipes don't seem to be getting hot at all at the moment even thoughts it's extremely close to the head. And I've not even carbon wrapped them yet

[shnazzle]

No worries then! Leave as is

[dan944]

I can hear it sucking air right beside my head where it is sounds good!!

[shnazzle]

I can hear it sucking air right beside my head where it is sounds good!!

Ah that is very nice indeed

All of this talk about your build and figuring it out has made me realise how bad a Helen's build actually is in some areas. The beloved SP240....

It's all very high quality kit; top of the range materials and the fabrication is stunning.
But... A maf-based fueling strategy with the MAF before the turbo? It's no wonder it leans so very heavily on the map of the piggyback. The stock ECU doesn't really stand a chance! It has no idea how much air is actually going into the car.
And then further compounded by the difficulty of tuning a car with a return less fuel rail, having to adjust for changes in fueling as load increases.

Further emphasized by unplugging the TPS (forces the car into permanent open loop), the car runs much better but is sluggish on the throttle.

All in all, once you're set up with the ecumaster, you'll have a fundamentally well-built and thought out setup.
Kudos!

[1979scotte]

This is definitely my favourite turbo build.
I think it's perfect for stock engine and gearbox.
The only thing I would differently would-be to run a charge cooler.
It's the ECUmaster deal that makes it all possible otherwise you would be looking at more like 2k to get a link fitted and mapped.
The previous cheaper options where less than ideal piggyback or PFC.