Dyno Results for Midwest Turbo Connection (MTC) 7659 Billet TD05's (Stage 4's)

[JRink]

Few updates today...

Swapped in some 3" pre-turbo piping (tapered down to 2.5", the size of the compressor inlet) on Friday, and added a small sized meth nozzle pre-intercooler for extra safety. Results are mixed I guess. Found that with the larger intake piping, the turbos don't seem to have to work as hard to make 'x' boost. Whereas last week, 85% duty cycle was 35psi on my Blitz DSBC, it only took 75% duty cycle this time to make 35psi. The first dyno pull was still using 85% duty cycle, which resulted in a 38psi pull by mistake - An 'oops' on our part since the MAP sensor only reads 35psi, higher boost yields a leaner tune. I think it got as lean as mid 12's AFR on that pull. Car made substantially more power at that boost though, 895awhp. We re-adjusted the duty cycle on the DSBC from 75% to 65% to get us back to 35psi and made 852awhp. Decided to leave it at that for now... Timing advance is still in the teens and knock volts are very quiet at the moment.

Post-turbo intake piping is getting upped from 2" to 2.5" next, probably won't get done with that until next Monday or Tuesday. Shop has other cars they need to work on and this requires some cutting to my fender wall and frame near the headlight bucket to fit those larger pipes. Not really sure what (potential) gains to expect from increasing the pipe size and reducing suspected turbulence, pressure loss, etc.

Last Friday we noticed some exhaust soot on the front valve cover so I might have them pull the front header and fix whatever is cracked when they fab the intercooler pipes.

JR

[TurboSinceBirth]

It sounds like these turbos are capable of more boost and the timing is still conservative so there's more power on the table. I get scared on these cars approaching 35+ psi because I worry the motor won't hold it together without pushing coolant or worse.

[Vantage]

^^with the head lift fix & the a1 head studs most of us got in on, pushing coolant should be a non-issue, correct?. And it seems like most people working around those kinds of numbers, have adequately reinforced most everything else in their motor anyway.

[keo92stealth]

895awhp= beast mode!

[TurboSinceBirth]

^^with the head lift fix & the a1 head studs most of us got in on, pushing coolant should be a non-issue, correct?. And it seems like most people working around those kinds of numbers, have adequately reinforced most everything else in their motor anyway.

Yes. Itallo used that and boosted 38 psi or something like that on his last dyno. I just cringe at anything higher than low 30s boost because for years nobody went higher. We're not running around with small 4-cylinder motors and one turbo. I'll have the A1 head studs and Ray's head lift fix but I wouldn't plan on pushing a set of turbos that hard. I'm sure I would pick bigger turbos at a lower boost that will make the same power. I'll let someone else push the envelope.

[keo92stealth]

Yes. Itallo used that and boosted 38 psi or something like that on his last dyno. I just cringe at anything higher than low 30s boost because for years nobody went higher. We're not running around with small 4-cylinder motors and one turbo. I'll have the A1 head studs and Ray's head lift fix but I wouldn't plan on pushing a set of turbos that hard. I'm sure I would pick bigger turbos at a lower boost that will make the same power. I'll let someone else push the envelope.

how much power did that car make the mivec 67mm x2 car? please tell me like 1200-1300p?

[92RT-TT]

Thanks for posting an update Jesse. Cant wait to see how the bigger hotside piping does. It'd be great to pick up another 10-15 whp at 35 psi once the new hotside piping is on.

[mehrshadvr4]

damn 38 psi and almost 900whp. i'm sure you could make it pass 900whp if you could tuned the car for higher boost. can't wait to see what the stage 5 would do. another 150-200whp over stage 4 and i'm sold.

[Sin'sVr4]

Jeez Jesse. Friggin sick. Dan those are some badass turbos bro. Ill post up this season what your 19T's can do at 4500ft elevation! hope to get atleast past 11.5 but this elevation kills us. oh well, lets see those stage 4's hit 900!

[MR2]

when's yah going to play with the Stage 5