Turbo still not finalised ?

[Avantus]

I just got my K26/27 hybrid from Richard, and according to him 450bhp with no later spool than a stock RS2 turbo... so how much earlier does a GT3071 spool then, because a stock rs2 turbo already is pretty good imo...?

[prj]

It does spool later than the stock RS2 turbo...

[A80Avant]

Yes i think a 3071R 0.82 would possible be able to make as much as a 3076R 0.63AR on the same engine.

I would choose the 3076

so we are not making David's decision any clearer!! haha

[A80Avant]

@ Avantus :

Both me and Dmitri have posted above where the 3071R spools, as well as what mods were on the cars. Read up and compare!

[Avantus]

It does spool later than the stock RS2 turbo...

I was told 150rpm, but a custom compressor wheel has been used... no idea if that is capable of reducing lag. Anyway, 150rpm is something I wouldn't notice anway

@ Avantus :

Both me and Dmitri have posted above where the 3071R spools, as well as what mods were on the cars. Read up and compare!

Yeah went through the topic more attentive, and it's interesting to compare when my car will be up and running again by next week.

[Error404]

This is a good thread David as this is somewhere around my eventual goal for my engine build too:a reliable 450-500lbft with as much area under the curve as possible is what I am aiming at.

I agree that taking a ride in a few different spec car is probably the best way to go about deciding what route to take - plots, charts, maps and figures don't tell then whole story

[Jamo]

500 ft lb in a 220mm block is a tall ask error garretts won't get you there for that aim

[prj]

I was told 150rpm, but a custom compressor wheel has been used... no idea if that is capable of reducing lag. Anyway, 150rpm is something I wouldn't notice anway

300 rpm...

But it won't matter, you will use exactly the same gears anyway.

[Error404]

500 ft lb in a 220mm block is a tall ask error garretts won't get you there for that aim

you have to aim high

I thought a RS2 turbo would do it, while screaming its nuts off about to blow up?

[A80Avant]

Dont worry Error, even the 600Nm (not 677=500ftlb) are quite enough to get the adrenaline moving.

I think the velocity in which you reach the high torque is what makes a big difference as well.

[macspring]

misconception about spool and drive ability and also 034 do not make the k26 / 2871 or 3071 you can get it from any garrett dealer with garrett kkk hotside

034 had their own range of hybrids which JP was referring too

Have you driven or been in a car that has 400 bhp there a major difference between turbo response and full spooled boost and you need to out and experience these cars rather than from the online quotes of power and response as they are not the same

Jamo,

Agreed, I am at a disadvantage not being able to ride in a suitable car, not withstanding Diesel Des' offer.

Hopefully the advies on here will allow me to use this thread as a work around.

Can you expand what you're referring to in your second paragraph above. Can't quite cop what you're getting at.

Thanks.

[macspring]

All,

After reading the posts, I'm thinking of a GT3071 with a .63 ?

While this would not give me ultimate power potential of the engine's spec, but should be a good "spooler" with good early'ish boost, together with strong mid range, not too concerned about power after 6,000 rpm.

At least that what I think at the moment, not having driven it, or any other B4 /C4 with similar spec / power.

Second choice would be an RS2 turbo hybrid for reasonable early spool and strong mid range.

Am I correct in my synopsis ?

P.S. - Forgot to mention the question of injectors

Any comments / suggestions to match one of the above turbos ?

Thanks for you patience.

[A80Avant]

I maxed out my 440cc injectors. I wouldn't use anything else than EV14 now, perhaps the 52lbs ones

sent using Android

[macspring]

Vasilis,

Heard of these.

How does one work out the appropriate the size of the injectors to use ?

Aren't there adaptors to buy to be able to use them on our engines ?

Where does one buy the injectors and the adaptors from ?

Approximate cost of both items ?

I see that RS2 injectors are for sale at approximately £150 to £180 gbp on here.

Thanks.

[prj]

RS2's are way too small. 440cc's should be enough for a 3071R at 4 bar, if there is no fuel pressure taper. Stock fuel pump won't work.

Your clutch won't hold as well, you need a SRE pressure plate at the very minimum.

Also, what manifold do you have? I don't recommend 3071/K26 hybrids. If you have a KKK manifold, stick a K26/K27 on there.
If you can get a T3 manifold, then you will need custom water and oil lines.

With a 3071R the RS2 airbox just barely fits, but some modifications are needed.
The inlet is bigger than standard, you will need a maf-turbo hose with bigger opening for turbo.