20G Fess up

[EVO-00X]

Asking for a mate. What sort of power do the boys with the GTPumps 20G wheel in big 16G turbo + manifold been getting? And what wastegate are you using? He had his dynoed at 250hp atw today on 20psi because the wastegate was creeping :roll:

 

[DOUGMO]

with what other mods rob?,

i would have expected over 280hp @ wheels at least if not more,

depending on mods of course

 

[matress]

250hp does sound pretty low... you should be able to get that with a 16g.

what boost controller is he using?

I know Paul (BCNYA) got about ~220kw with the gtpumps TD-05 20g

 

[tharaka]

i made just over 250hp atw with my 16g on 20psi

the 20g should be able to make waaaaaay more than that


does he have the 34mm wastegate flapper?
i remember reading ages ago on dsmtuners or something that the bigger wastegate flapper creeps because its larger surface area has to hold more pressure and it cant

 

[GSRWRC]

I made 246hp on a 16G @ 17.5psi on my old GSR. As mentioned, I would expect 280+ from a 20G (And I do in the Mirages case too )

 

[EVO-00X]

Yeah guys, its actually Paul's (BCNYA) turbo but modified! :lol: Mark at GTPumps put on a TD06 compressor housing (now its a TD06/TD05 hybrid) and also a TD06 turbine wheel for more top end so thats why we were expecting more. Other mods are sheetmetal intake plenum, big cooler and piping, Haltech E6X, 510cc injectors, Sard FPR, Apexi AVCR boost controller umm... no boost leaks or intake leaks or anything. We were expecting over 300hp atw but Mick could only get 250hp atw out of it on 20psi which seemed low.

 

[EVO85]

As far as I knew, the EVO 3 16G is good for 380hp at the flywheel and 400hp is there for the taking with the 20G compressor wheel....

I have made 203Kw's at the front wheels at 19 psi, but with more boost cams and adjustable cam gears, I am hoping for 240kw's+

 

[MADVR4]

think it needs cams... look at the dyno chart? where is it droping power?

get some 272's get better mid top end....

also yea wastegate flapper would be a big issue

Grant

 

[Lister]

IMO, those injectors cannot flow anywhere near enough for that boost. They will be up very high in the duty cycle. Injectors and cams.

 

[tharaka]

510cc injectors

i think that might be your problem

 

[JSTYLE]

Yeah guys, its actually Paul's (BCNYA) turbo but modified! :lol: Mark at GTPumps put on a TD06 compressor housing (now its a TD06/TD05 hybrid) and also a TD06 turbine wheel for more top end so thats why we were expecting more. Other mods are sheetmetal intake plenum, big cooler and piping, Haltech E6X, 510cc injectors, Sard FPR, Apexi AVCR boost controller umm... no boost leaks or intake leaks or anything. We were expecting over 300hp atw but Mick could only get 250hp atw out of it on 20psi which seemed low.

so in other words its a TD06H turbo watercooled wit a 070 rear end!

250hp ATW is quiet low.. tho i would take it to the strip cos power isnt always right on a dyno.

i know of an evo with a TD06H-20G comp wheel and TD05H rear end with 070 made 23kw (~310hp) and ran low 12s... at almost 120mph..

Jon

 

[EVO-00X]

For the record, a few months ago with stock VR4 intake, stock VR4 exhaust manifold, stock TD05 14B turbo and 510cc injectors Mick got 210hp atw out of it which was pretty good for the small turbo

With his new setup only making 250hp atw the injectors were pretty high in duty cycle but still good as it wasnt leaning out and I'm sure Mick would have recognised a need to put bigger ones in if required. I thought exactly the same as you guys did, I said he would be better off with 600's but i was told the 510's were still up to the task.

So the investment of taking the car to Sydney and cost of tune and dyno + bigger TD06 20G turbo, sheetmetal intake, GTpumps manifold, icoola and piping for only a 40hp increase atw was a bit of a let down for him as you could understand. Something just doesnt seem right with the 250hp... now if it were 250kw (335hp atw) that would be more like it :lol: I'll see if I can get a dyno printout.

In the meantime this is the exact same turbo from Paul BCNYA when it still was only a big 16G with 20G wheel and 20psi boost. This is why we all thought easy 300hp+ was on the cards with the modified turbo :roll:

 

[bazeng]

hows the motor?
compression okay?

 

[antilag]

I think it may be something to do with the cams.. If they are still standard?

Try some crower or bc 272's

 

[CLuTZ]

My car made 216kw at the wheels on 21psi last friday with 510cc injectors, big 16g with GT pumps exhaust housing and manifold, and 272/272 cams. Managed 111mph at Heathcote the next day.....

Not bad for $4500 8)

 

[trist]

wow thats awesome what time was the 111mph run

 

[CLuTZ]

wow thats awesome what time was the 111mph run

13.7

should do a 12 with slicks

 

[trist]

very nice let us know when you will try and crack the 12s and i will come for a look

 

[EVO-00X]

Engine was rebuilt early this year with oversize forged pistons, cryogentically treated VR4 rods, Cometic, ARP everything, h/duty valve springs, KU engineering intake manifold, head tested, the normal rebuild stuff so there's not many kms on the engine at all. Engine checks out fine so there's a couple of theories as to why its not making the power. Mick just reckons piss the 20G and manifold off and throw on a Garrett and be done with it :lol:

 

[EVO85]

Engine checks out fine so there's a couple of theories as to why its not making the power. Mick just reckons piss the 20G and manifold off and throw on a Garrett and be done with it :lol:

I can't see how that will solve the problem unless there is something physically wrong with the turbo. You seem to have the hardware to produce ~300hp at the wheels. It has been done before, it can be done again. Personally, I would apply some of the 'theories' that you may have first...search for any restrictions, rather than just ditching the turbo and manifold....