TSE 6258 @ 7psi
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Joined: Mar 2011
Posts: 65
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From: VA
TSE EFR6258 @ 7psi
212whp 195wtq. 153kpa. 7.5psi medium can wastegate pressure on Shell 93. 1000 miles on the motor, but my tuner wanted to be conservative on a fresh block. It feels like a pretty solid track map, probably don't need too much more power. I plan on racking up another couple thousand miles and then get back on the rollers with a Trackspeed 4 port EBC and a Turbosmart dual port iwg, we'll try to max out pump gas for a street map. I will eventually change out the fuel setup and start an e85 map.
Motor:
Motor:
- Trackspeed "Stage 2" shortblock
- 83.5mm Supertech 8.6:1 piston w/ thermal coating
- Manley H-beam rods
- ACL Race bearings
- ARP head/main studs
- Boundary Stage 2 oil pump
- OEM untouched BP6D head
- OEM valves
- OEM solid lifters
- Supertech heavy double valve springs
- OEM BP6D cams
- OEM EUDM Squaretop manifold
- Trackspeed Turbo Kit w/ BW EFR6258 0.64a/r
- Precision 350hp intercooler
- Custom 2.5" coldside 2.25" hotside intercooler piping
- ARTech 3" exhaust
- MSLabs MS3 Basic w/ CAN Wideband
- Innovate MTX-L
- FlowForce 640cc EV14 injectors
- DeatschWerks DW200 fuel pump
- Radium fuel rail
Last edited by mzmanny; Oct 13, 2019 at 10:36 PM.
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Joined: Aug 2014
Posts: 1,462
Total Cats: 389
From: Bainbridge Island, WA
That's a niiiiice torque curve. That's be a hoot to drive.
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Thread Starter
Junior Member
Joined: Mar 2011
Posts: 65
Total Cats: -2
From: VA
6258’s ship with the medium boost wastegate. 0 preload on the wastegate. Holds boost pretty consistently sometimes it will drop off on the top end, I think the wastegate might be getting blown open. That will be irrelevant with the 4 port EBC and Turbosmart IWG.
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Sweet curve, exactly what a healthy NB motor should make at ~8psi. Not great practice to use super-low preload to reduce boost, though. It will make the car way less responsive compared to a proper low-boost actuator and a little more preload. I would definitely swap the actuator and tweak the preload until the peak boost is the same as what you have now - you will notice a big difference.
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Thread Starter
Junior Member
Joined: Mar 2011
Posts: 65
Total Cats: -2
From: VA
The car definitely pulls real good with tons of useable power, it feels almost like a big v6. On a cold night she will hit a little under 8.5psi. I’m already itching for more power. It can feel a little laggy at times which is probably due to not enough preload like Andrew was saying. I used the medium boost wastegate because I was intending on running a little bit more boost, but my tuner wanted me to keep the boost down. To be honest I wasn’t really prepared to swap on the low boost wastegate, nor was I thinking about that on the dyno day. I’m pretty stoked to see how the car feels once I get the EBC hooked up with the Turbosmart IWG. I will be reporting back in another month or so. The improved response with the correct wastegate strategy is certainly encouraging because it already gets up super quick.
Last edited by mzmanny; Sep 16, 2019 at 11:32 PM.
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