What kind of power te expect

[Evert Thomas]

Hello dear forum member:

I'm building an S2 engine with the following specs:

1. Turbo Garrett GT3071R Ar.50;
2. engine SCAT conrods and JE Pistons (83mm);
3. CAT cams, witht the following specs:
- Intake 278o;
- exhaust 251o;
- Lift intake 1.145mm
- Lift exhaust 995 mm
- Spread inlet 110o;
- Spread exhaust 120o;
- Lift BDP inlet 2,4mm;
- Lift BDP exhaust 0,5mm.
3. Mechanic lifters in stead of hydrolic lifters, so i could run some more rmps;
4. Hand made spagetti exhuast manifold;
5. 3 Inch downpipe en exhaust;
6. Bigger intercooler wicht reversed intake manivold (Wagner);
7. DTA stand alone ECU.

My question is, what kind of power (HP en torque) can i exepct?

[Evert Thomas]

I almost forgot, the cilinderhead is ported.

[terrybullwon]

How many more RPM?

[Evert Thomas]

That i have to find out, but I think about 500rpm should be possible.

[driftin jo]

That i have to find out, but I think about 500rpm should be possible.

About 12 hp then

[Evert Thomas]

Haha ok, well if i manage 1.000 rmp, that would be 24hp?

[terrybullwon]

I am pretty sure that garret is over and done by 7500rpm?

[driftin jo]

What we are trying to say is there is not much point in extending the rev range if your not using a turbo with enough flow capability to keep the boost up at high rpm .
I would say you could make ~470 HP but you would have made that before stock rev limit anyway .

[Rocco]

i think that 750hp and 1000nm are possible , i have a "friend" with worse specs than you with the same turbo giving 523cv & 683nm

[Dan]

i think that 750hp and 1000nm are possible , i have a "friend" with worse specs than you with the same turbo giving 523cv & 683nm

[Evert Thomas]

I agree on the revs. I didn't changes the internals and lifters to gain higher refs, to be clear about that.

[prj]

Your hotside is tiny.
That hotside is suited for a 1.8 engine or smaller, not for a 2.2.

You will struggle to make any power at all, because you will get crazy backpressure.
Go 0.63 or bigger. On a ported head, I'd say 0.82.

[driftin jo]

If you take that you can make between 9.5-10.5 HP per lb of air per minute then like I said the middle of that would be 470 HP for this turbo . See compressor map.
But as Pri says .50AR is not a good for a 2.2 20v engine, so in this case you would probably only make 9.5 HP max per lb of air per minute as a result thus ~445 HP if you are lucky .

[Evert Thomas]

Thanks for the reaction so far. I'm using my car as a racecar and chose this turbo for the fast spool up.

[rs200]

i think that 750hp and 1000nm are possible , i have a "friend" with worse specs than you with the same turbo giving 523cv & 683nm