Different turbos help needed.
Turbo Mini Forums

Hi all, this is my first post on this forum :)

Anyways, ive done some searching around on the forum, but cant find my answers. Hoping you guys could help me :)

Im about to select the turbo for my mini, a 1275cc, and im hoping to get around 130-150 hp out of it. i want the boost to start at around 2000rpm

Will the GT1544S be any good for this? or will i need to up an class and go for the WGT1752S? also if anyone has any idea what the S on the end means :)

the reason why im asking is because my local shop has these turbos in there store, and they costs 540£ each, same price for all the turbos.

The other ones they have are:

KKK K03
TD04HL16T
WK03

dont know if any of these will fit.

Thx a lot for all help :)

I'd go for the GT1752 as it seems to be capeable of pretty much anything! lol

Have a little search for threads with gt17 in the title.

If something is worth doing, it's worth doing half of.

hehe, sounds good, i checked some threads with gt17, and heard stuff as turbo lag, and that it was to big for 140bhp, and the boost coming to slow. Is this true? :)

From memory i read that one user was getting "some" boost from as little as 1500rpm!

If something is worth doing, it's worth doing half of.

wow, ok i will definitely go for that one then :p thx a lot for great answers! :)

Don't take what I say as gospel. Have a good rummage around this site and also wait for other replies. However I think its fairly safe to say you won't be disappointed with the GT17.

If something is worth doing, it's worth doing half of.

Hehe, sounds great to me =)

Is 540£ a great price for a new turbo like this?

Sorry, i meant 430£ :]

it is if its not a copy of the original.

hi mate!
where exactly are you buying it from??? is it original - authorized seller??

I need one as well can not fined where to buy :(

Nothing special!

Starts building boost and making useful boost are quite different things. Roberts car is remarkable, but it is not making propper boost at 1500rpm.

I personally think that you'd be dissapointed with the GT17 if you want lots of boost at 2k.

A GT1544 will be a bit small, but the GT1548 would be good.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

^ See told you not to listen to me :)

If something is worth doing, it's worth doing half of.

heres my engine boost curve from the gt 17 thread ...,this was set to 5 psi .



regards
robert

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Exactly. at 2k you have 1.5psi boost. My IHI is much the same on my 998.

If someone wants boost at 2k I presume they mean more than a wheezy 1psi !.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

um,exactly.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

cummon robert, you know what I mean. My car make boost at 2.2k, but it dosen't really take of till nearer 3.

My wife's Abarth, makes nearly 0.8bar at 2000rpm, but still happy with 1bar up to the rev limit (and the same turbo will make 160bhp on the essesssssss).

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I see, so i wont feel any difference until 2,5k :) well that is actually ok to me, saves some gas.

wil_h do you have the same turbo? and do you recommend to rather go for the T2?

Thx for all of your answers

Well I run T3 on a 1275, which is supprisingly ok. An IHI RHF4 on a 998 and a GT1752 on a 998.

The IHI would be very driveable on a 1275 and on paper easily make over 150 bananas.

The GT17 will make all the power you need, but I only get away with it on a 998 as it's not a road car. The GT17s are a great turbo, but boost threshold is not much (if any) better than the Metro T3.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

hmm sounds good, how much is the difference between the GT1752 and the IHI RHF4?

And how is the IHI to install? ive seen a lot of guides on the GT17 but not one on IHI :)

And your saying i will get the boost earlier on the IHI?

Sorry for all the questions, but im pretty new to this stuff

Yes you will get boost earlier with the IHI. I would say the IHI is an easier fit as it's smaller. I had a manifold made then made my own elbow.

To be honest there is no real differance fitting any turbo. You either make (or have made) a manifold or somehow adapt the Metro turbo manifold. Then you need oil (and maybe water) feeds and returns. simples.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

wow, that sounds awesome, thanks a lot for the information guess i'll have some make it for me.

Anways, why is it that the GT17 is so much more populare than the IHI if its not that good?

i was also thinking adding a st3 head, new pistons, rods, cam, crankshaft, and i guess i have to change into straight cut gears too.

St3 head means nothing really. You need a head suitable for turbo use. Speak to BENROSS or Turbo Phill on this forum for guidance.

The 17 is more popular because it has more development (I think I am the only one with IHI turbos, could be wrong). also, the 17 will make more power which is what people want.

If you only want 150, then why compromise on boost threshold when you'll never get the benefits of the 'larger' turbo?

Standard A+ rods and crank will be fine. Cam is up to you and a whole other subject (the MG metro cam is my favorite).

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Hmm thanks for the heads up, i will certainly do it

Hmm, so the IHI sounds best for me then, how high can i go with this, if i want a little more bhp later? :)

The spec on the ihi is that it will flow enough air to produce hp from 62 to 177hp . I'm currently looking at fitting an older ihi VJ14. Yet to be comfirmed , but it looks like I'll be able to fit the engine without needing to cut the firewall to fit a turbo box section. (Custom manifold and exhuast down pipe required) The engine will however need to tilt forward a few degrees. The nice thing about this turbo over a t3 is that is spools up far quicker and will reach it's maxuim boost far sooner (very low turbo lag). Down side is that it will never produce the sort of power that is possible from the larger turbine turbos.

Edited by NealfromNZ on 3rd Feb, 2011.