hope some one can help me on this . my turbo went on my 2000 spec impreza , i bought another td04 from ebay only to find out it was no good and i still had very little boost so i bought a new td06 20g which improved my boost . the problem i have got now is that i only get good boost towards the top of the rev range . in forth gear im getting around .9 bar but i have to keep the revs really high . can any one tell me if ive fitted the wrong type of turbo and if so what one should i use . the car is standard spec but i am going to uprate for more power in the future .

 

You'll need to pop and see enginetuner they are an hour from you You have changed the turbo without a remap by the sounds of it.

 

remap needed after changing turbo spec.

 

Would imagine the TD06-20G is way too big for your standard set-up.
IIRC the turbo is good for approx 430 -450 bhp @ 1.2 bar and full boost is achieved around 3500-4000rpm.


Mick

 

i think 430-450 is being slightly optimitstic, more like 370-400 on a good day

but your right in what your saying, his set up is not correct for the turbo, i run a set of 550 injectors and a FPR with a host of other mods and stuff

 

if you change the turbo your afr is gonna be shagged a turbo that size will need the fuel pump and prob injectors changing, then mapping to run even safley let alone at its best performance

 

thats more a rx7 turbo if im not mistaken

 

- To the OP: unfortunately, you can't just go and slap a different turbo on an engine (esp. if it's a bigger one) and expect it to be optimised for power and be safe for the engine. It'll cause the ECU to look up wholly inappropriate - and unsafe! - map tables.

You really need to drive off-boost and at as low rpm as possible on your journey to the mapper - i.e. run in as high gear as is practicable with minimal steady throttle... but so the engine doesn't labour either!

Even better, don't drive the car until it's mapped! How?... Well, Jolly Green Monster will drive to YOU and map the car on the road for you! You obviously would have to pay his fuel costs... he's based in Kent, about 200 miles away.

 

- The TD05 20g is a 370-400bhp turbo for sure... But what about this TD06 20g, then? Presumably it follows on from where the 05 leaves off e.g. about from 400 to 430-450, as merlin24 says? No?

 

so by the sounds of it i need to replace the fuel pump and get it mapped . how much would i be looking at to get it mapped as i know the price of a uprated fuel pump . i dont mean to sound stupid but what is a ( afr )

 

Actually I would take it off and go for a better suited turbo like a vf35 or a vf23/28 or a TD05 16G rather than what you have on now, as you wont get the full potential from your engine (it will just put the rods through the block) so you may as well run something you can get the potential from
You will need to upgrade the injectors, fuel pump and as uk turbo's were all Impreza 2000 awd, ensure that yours is a MY99 or MY00 car as they have the mappable ecu's (cost of about 650 quid to map).
And we wont even go into gearboxes or clutches, that will just scare you

Tony

 

great that was 400 quid wasted lol . any idea where i can get a td05 front entry from and is it worth trying to sell the td06 , as im not sure what it will be good for now . kev

 

the car is a turbo 2000 on a w plate how will i find out if its a my99 or a my00

 

harvey smith is the man

 

W will normally indicate its a MY00 model car, chassis number will say or if it has map lights in and colour coded mirrors/door handles, that also indicates its a MY00 car so the ecu is mappable

Now have a look around the for sale area for turbo's, best not buy them off ebay, most are just sh@gged or tired

Tony

 

Ahhh my mistake, i didnt realise it was a TD 06 version, i just read the 20G part lol

must remember to read threads correctly in future lol

Anyhoo if its the TD 06 20G and he`s running it on a standard UK turbo then i see tears on the horizon, for both the engine and gearbox

 

i thought alot of the 20g like andy f ones were td05/06 20g?

05 rear and 06 front?

 

what ever version it is its a waste of money with out the correct set up, fuel pump injectors, FPR, map, blah blah blah you know the score lol :-)

 

Your in virtually the same problems with a tdo5 as you are with the 20g you have I'm pretty sure there will be a thread soon wondering on how your engine/gearbox blew up

 

i think i will get a standard td04 . before the turbo went it was pusing a nice 12 psi on low boost and 19psi on high . which was all set by the bloke who ownwd it before me . any ideas what i can do or get for the td06 that i bought so the wife dont kick me out for blowing money or the engine first

 

Yeah, Tony and Dunk are correct. Stick something smaller in that will be far more matched to the flow rate of the MY99/00 440cc injectors and the relative limitation of the OEM TMIC.

The VF35 is a good, cheap and popular choice. These are still quite lively turbos (you won't notice too much difference in its later spool-up times, compared to your old small TD04) and you should see up to c.320bhp (that's right, isn't it?) on your TMIC (if lucky) when all mapped. So you will have gone from 215bhp to over 300! Similar numerical lb ft jump on the torque too!

IMPORTANT: If you haven't already got a decat system in yet, then do that mod too. Also stick in a fresh Apexi/Green/K&N panel filter in the airbox, NGK PFR7B plugs and the Walbro 255 fuel pump you mentioned. I'd also replace the fuel filter for peace of mind too...

Then get it all remapped by a mapper of your choice and you'll be tres happeee lol.

 

What does this mean?

I'd like to know the diff between a TD06 20g and a TD05 20g... spool-up, max bhp potential, etc, etc...

 

when i bought the td0620g i was told that id would it would handle 450 bhp . it starts to spool up from about 3500 rpm . but thats all i was told about it from the company that i bought it from

 

TD06 will handle near 450bhp'ish but it will have more lag than say the md321t and not make as much torque. Its a good turbo if it was bought cheap

 

Is yours one of the many available on eBay?

 

That's what I expected. How much later does it reach full boost compared to the 321T?

Where could you get hold of a 'proper' TD06 20g, and not one off eBay of questionable quality?

 

ask alanbell or steven darley as they both have full experience of how good the md321t is over the td06 turbo I'm pretty sure the td06 topped out at 430bhp????

 

Harvey and Andy F build "Proper" ones

 

Andyf does td05/20g and NOT TD06 as they are two completely different turbos

 

Cheers, you two.

Looks like the 321T has spool-up time and potential max bhp covered then. How much do they differ in price brand new? The T is about £1350 +VAT, I think... What about a genuine TD06 20g?