Thread: Yada yada, more dynos.

Is this a better comparison?
Disco potato T2 .86ar. 53.8mm 76 trim turbine. 46.9mm turbine exducer.


GT3271r. T3 .78ar divided. 64mm 73 trim turbine. 54.7mm turbine exducer.


The .86ar housing on the very small disco turbine flows more still. Even though it is a very small wheel, and the housing is larger. It shouldn't have any business flowing more than a GT3271r. Or even the 60mm 84 trim GT30r in the .63. But the .78ar on the 30r is even smaller than the .63. I don't think the .78ar divided housing on the 30r is going to flow more than 20-21lbs max. Which on this small 60mm turbine, will flow like crap. Hell, the .63 flows like crap.

I should have bought a disco? lol.

coheed I will be doing some testing with my gt28rs .86 vs the gt3071r .86. both turbos are in are t2 and setup for a external gate. I figured since I have both turbos I will try both out on the ve motor. I already know what the gt3071r will do on a ve setup but would like to see what the gt28rs can do.

the 3071r will make a lot more power than the disco. It flows better all around. But the restrictive .63 and .78 housings will get their butts kicked by the .86ar in both the disco and the 3071r.

I am interested to see the results though!

What dictate most on "how" restricted is the turbine housing is the wheel .
Take a look here coheed fully-built agu motor 2.050 cc that I recently help on the tune.
352 catcams
gt35r ""0.63 t3""
3 turbo back
600 hp fmic 2,5 all arround piping
alky injection
44mm tial wastegate dumped to the atmosphere
supertech valvetrein including bigger valves
and all the suporting mods...615 whp. 500lbs at 6100rpm


1 man you need a more tuneable ecu ASAP
2 alky will do wonder for you I know this very well (almost 5 years using and tuning with this) I know for fact that the dividied 0.78 housing will do more than 450whp without probs .
regards

34psi! wow! I bet I could make about 500+whp on that much boost with water/alky.

Last year on this same dyno (prob configured the same), I put down 430whp on 22psi, and 436-442whp on 24psi on the dynojet. But last year I only got 358whp on the dynomite. The dynomite doesn't seem to like my car much.

I know this housing will make more power, but to what extreme will I have to go to make that power? I made 396whp on 19psi last year on the dynojet. This year the car feels about the same. It boosts way fast. Incredible. But the powerband hasn't shifted to the left as much as I expected it would. Regardless of the amazing transient response.

I bet on 24psi on the dynojet the power will be within 15-20whp even though I am running more fuel and backed timing off a degree or two just for safety. I laid down 361whp last year running a very aggressive afr, and after richening it up I still made 353whp. I only lost 5-8whp by running 11.5:1 over 12:1.

I still think I should make more than 400whp on 20psi though, and I bet if I measured BP it would show for sure that there is a lot more bp than expected.

The GT35r has a 62.3mm exducer, and in the .63 flows about the same as the .82 3076r.
Tekkie is also running a .82ar with good results.

I did find this dyno just now on a couple of STIs:
Same setups, but different manifold/housing combo. This is a .63ar tial housing GT35r vs a T4 1.06 GT35r.


The .63 tial made more power, but the 1.06 spooled slightly faster. The faster spool is likely from the "smaller" 1.06 housing. The .63 tial housing also has a much smoother casting, and thinner material. But to see power so close is def showing me some light.

TeKKiE thinks his motor is a freak motor, though. I don't for one second think that my results are typical.

I can tell you this much:

at 3900ft ASL, my friend put my car at around 310whp with his SOTP. This was psuedo verified with every trap speed on the 1/4mi. @ 120~121mph. The car was a completely different animal in CT at much lower elevations. Nothing else changed, I'd imagine that I was around 330~340whp prior to the o2 induction manifold being installed. I could never even break traction loose in 3rd gear in El Paso, but in CT it was effortless.

Its all in the CT air!

I would like to see Coheed's car on meth @ 24psi. With a good "tune", I don't see why low 500's are not reachable.

There is a local DE with the same 30R making 430 at 18psi with BC stage 3's.

Agreed! Seems everyone has pointed at a meth setup. Cheaper than buying another exhaust housing and gobs more power to be found.

DO IT!!!!

Tell me, the turbine housing was a .82 right? I bet it was.

The larger housings and the extra flow they provide get the engine very close to crossover. The big cams will come alive on the .82 housing. I would love to see someone try the 1.06 with some huge cams. I bet it would surprise a lot of people here. I bet it won't be as laggy as some believe.

I've thought about just getting a GT3782r. The larger turbine and TS housing makes it a perfect fit for this setup. And since I don't need to make a ton of power... it is good for about 550 or so. I don't really need more than my injectors can handle. I just want to have the flow to make use of an efficient setup.

The water meth setup would be nice. After looking at my dyno charts it is apparent that the .78 may be so restrictive it is slowing spool. But it could just be the longer runners of the manifold compared to the log. But I would still expect the TS to make torque sooner.

15psi and still no torque. The datalogs show no significant airflow readings until about 4500rpm or so, even though I nail 15psi easy at 3800rpm in 3rd gear.

It still sucks I can't use the VE cams without getting a massive torque drop at high rpms, and the fuel shows it getting very rich, possibly from a diluted mixture. I am betting it wasn't boost leaks causing the power to drop off. I bet this is reversion showing its ugly head again. Torque drops like a rock on my dynojet chart with the standard cams:


Horrible powerband. Looks like a T2 GT3076r chart.