Neilo

im looking at these 2 turbos, but im not sure of the "real" difference betwene them....spool times, out and out power etc...

Im looking for a 400bhp build so the turbo choice is quite key.

Thanks

stevebt

iTrader: (8)

alan bell has the td06 20g on his car and his last car had a td05/06 20g so he may be your best person to ask

Neilo

i thought alan had the TD06-49 from lateral......thought that was different...

john banks

Different turbine wheels. The 20G compressor may not be fully exploited by the 05H turbine, capping the power to say 380-400 BHP on Optimax depending on rollers, and 10% more with methanol or octane booster. There is also a Fatboy turbine wheel from Deadbolt which may or may not be a T31 Garrett wheel, for which they claim another 5-10 BHP and quicker spoolup than the 06H. If I ever do another 2.5 Scooby I think I would be wondering about a SZ55 with the Fatboy wheel, but I wouldn't even consider bigger than a TD05/06 20G on a 2.0 unless it was a built motor and I could run 2 bar. NASIOC has some info on the difference between spool up on the 05H vs 06H turbine wheels, sometimes the 06H can sound disappointing from the spool up reports. On a 2.0 the 05H-20G hits a bar at about 3000 with OEM manifold, later on tubular. On 2.5 it is about 500 RPM earlier. Unless there is a massive torque hit to compensate then you might find that something that doesn't hit full boost until 4000 RPM or higher in a low gear might be a PITA on a road car.

WUZ

iTrader: (14)

TD05/06 = TD05 hotside, TD06 Compressor, 20G compressor wheel

TD06 20G = TD06 hotside, TD06 Compressor, 20G compressor wheel

ie, TD06 20G will flow more up at the top end due to the bigger hotside having lower backpressure at higher levels, but due to the bigger hotside, will be laggier ( by about 700rpm, AFAIR)

Russell

3barboost

On a 2.0 Classic I have achieved 201kw at the wheels about 270hp on the wheels on a heartbreaker dyno at an altitude of 1600m above sea level on 102 octane fuel on std Classic internals using an 05h 20G from Deadbolt boosting 1.25 bar.

For your purposes and your climate / altitude / fuel I think a 05H 20G will easily make 400 flywheel horses at not much boost either

The spool up of the Deadbolt 05h 20G on the 2.0 is better than that of a VF23 and that of a VF22

For a 2.0 I can think of no better turbo than the 05h 20G

I got dyno sheets that can compare the spool up where the turbo is the only item changed, but cant figure out how to post,

john banks

Photobucket and then post with [ img ] and [ /img ] tags without the spaces.

john banks

Dyno should be temp and atmo compensated though?

The 05H-20Gs do not sail through 400 BHP on the more believable UK dynos without a lot of octane though. Maybe with Optimax and a bottle of Millers they would

I wouldn't like to lose 700 RPM of spool up myself though in going to the bigger turbine.

Neilo

what about using them on a 2.33?

john banks

Treat like a 2.5 for spool up.

alanbell

iTrader: (6)

And its good ,

Neilo

is it different alan? or is it a TD06 20g?

alanbell

iTrader: (6)

Its different ?? Best wait for Mark > Andy > Steven who has done all the work on my car !! because i dont know the anwer , cheers Alan,

Neilo

fair enough!

SCOOBYD00

AndyF supplied mine... then the grin just got wider...

Neilo

on what engine mate? was it built? or a standard 2.0/2.5?

Midlife......

iTrader: (2)

Neilo

I run a TD05 18G (Deadbolt) on my bugeye WRX as the revs are lower ...

Shaun

3barboost

here is a dyno sheet of an 05h 20g on a classic with the following mods
Equal length headers
EcuTek remap
Standard induction and air box
Perrin turbo to maf intake
Sti8 TMIC

The dotted line is the cars previous run with a hybrid VF22/23 homebrew turbo, 22 compressor and 23 exhaust

This car runs a 12.8 1/4 with a terminal speed of 180kmh

We are proud of the results as our fuel is poor and so is our altitude and ambient temps, the map needs some work to sort out the mid range dip and then i expect the result to be even better, this was a max boost pressure of 1.25b

3barboost

This is a dyno of a TD05H 20G on a blob eye wrx
with STi short block
RC engineering 650cc injectors
wrx intercooler
std induction and airbox
Perrin turbo to MAF hose

This car feels incredible on the road

Again the map needs work

The previous run is using a vf23

3barboost

Sti8

05H 18G

Neilo

all those figures seem really low? unless theyre at the wheels????

Neilo

ahh wait, are they in kw?

3barboost

Yip those are real wheel kilowatts at Johannesburg altitude of 1600m asl with an ambient temp of prob 28deg C and in dyno room temp of 22deg C

the 201 wheel kilowatts is actually the first time the 200 wheel kilowatts barrier has ever been broken in Johannesburg. And it took an 05H 20G to do it

Andy.F

Just press the button

The 06 turbine wheel on a 2.0 may make more power but could result in a slower car due to the narrower powerband. Sometimes starting with a specific bhp goal isn't the way to go as you tend to compromise on overall performance to achieve it, if that makes sense ?

Quite how to quantify a performance target is a bit difficult. Someone suggested having a minimum of 50% of your rpm band available at full boost, (not just in a high gear but say 2nd gear upwards) By full boost I mean capability to hold it efficiently at the top end as well as achieve the midrange.

Andy

Neilo

i agree about the narrowness of the power band thats why i think that i may have settled on the 2.33 to help drive the turbo when i settle on it...

stevebt

iTrader: (8)

neil why dont you stroke your 2ltr then add the 20g as it will spool a little earlier

Neilo

because ive been told that stroking the 2.0 ist worth the hassle when the 2.33 will be pretty much the same price....they are all pretty much the same price in fact...

2.2 is only a little over 2.1 (so ive been told)

stevebt

iTrader: (8)

i would of thought there was a huge difference in price?? but what do i know

Neilo

you forget steve, whatever engine i will get is practically being built from scatch, so there is no need to crack open anything to start with.

Then youve just got to have all the necessary parts handy to create the 2.33 engine