Trackspeed Stage 2 VVT shortblock, EFR6758, CA91, 297whp/272wtq@17.5psi
#1
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Trackspeed Stage 2 VVT shortblock, EFR6758, CA91, 297whp/272wtq@17.5psi
Motor:
New dyno spot for me, the owners say it is very comparable to a Dynojet and based on the BMEP figure (66.5tq/atm-L) I am inclined to believe them.
- 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 valvesprings
- OEM BP6D cams
- OEM EUDM Squaretop manifold
- Trackspeed Turbo Kit w/ BW EFR6758 0.64a/r
- Precision 350hp intercooler
- prototype Trackspeed IC pipes
- Enthuza 3" exhaust
- MSLabs MS3 Basic w/ CAN Wideband
- Innovate LC-2
- Injector Dynamics ID1000 (54%DC max)
- Deatschwerks DW300
- Rewired fuel pump (dedicated relay)
- OEM BP6D fuel rail
- Fuelab 535 FPR (60psi w/ reference)
- Fuelab 818 filter (6ppm Fiberglass media)
- CA91 pump gas
- prototype Trackspeed GM D585 coils
New dyno spot for me, the owners say it is very comparable to a Dynojet and based on the BMEP figure (66.5tq/atm-L) I am inclined to believe them.
#2
With E allowing you to add timing back in during spoolup, I bet you'll pick up a really healthy chunk of torque below peak.
And obviously everywhere else, but that part is a given.
are you relying on the oem knock sensor only or did you hook up cans too?
Last edited by 18psi; 09-22-2017 at 04:19 PM.
#4
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OEM sensor. I break out each cylinder into its own line on the chart, which makes it pants-on-head easy to see detonation. If all the lines buzz along together, it's noise, but if one of them spikes, it's detonation. You can actually see the noise levels vary between cylinders based on sensor placement, since cyl2 and cyl3 are "noisier" than 1/4. With per-cylinder filtering on the MS3, I don't bother with mechanical det cans anymore. The computer has better ears than I do
#5
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But what if they all detonate together
I wish there was a way to do things like that for knock detection and timing pulling. Instead of a knock threshold, look for differences between cylinders, or past values.
I wish there was a way to do things like that for knock detection and timing pulling. Instead of a knock threshold, look for differences between cylinders, or past values.
#6
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OEM sensor. I break out each cylinder into its own line on the chart, which makes it pants-on-head easy to see detonation. If all the lines buzz along together, it's noise, but if one of them spikes, it's detonation. You can actually see the noise levels vary between cylinders based on sensor placement, since cyl2 and cyl3 are "noisier" than 1/4. With per-cylinder filtering on the MS3, I don't bother with mechanical det cans anymore. The computer has better ears than I do
Do you do baseline 'runs' in neutral to see what the no load noise factor is?
#9
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Nope. No need. The noise floor is very easy to set once you have a couple of no-detonation pulls logged. Just go 3-5% above the noise being generated on the noisiest cylinders (typically 2/3) and set the threshold there.
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I'm just stoked that my motor is still alive... I was seeing spikes that went up to 58% in the midrange when I first started adjusting the map! I see things now in the low 20s at max.
/end thread derail
#13
I'm trying here... pretty damn hard
I've been following the definitive VVT SWAP thread Savington posted and already have the 1990-1993 USDM fuel pressure regulator for my VVT motor and have a local friend for the 99-00 rail
I'm guessing cause you're running that expensive Fuel Lab it enables you to use the BP6D Rail? Should i expect any issues with the route i'm going? (Obviously yours is better)
Also how many shims are you running in this engine? On the website i see you recommend one - boundary recommends 2
I've been following the definitive VVT SWAP thread Savington posted and already have the 1990-1993 USDM fuel pressure regulator for my VVT motor and have a local friend for the 99-00 rail
I'm guessing cause you're running that expensive Fuel Lab it enables you to use the BP6D Rail? Should i expect any issues with the route i'm going? (Obviously yours is better)
Also how many shims are you running in this engine? On the website i see you recommend one - boundary recommends 2
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or by tweaking the min / max on the per cylinder traces on the logging, so that they all lie directly on top of one another.
#16
Do you have dynos pushing the 6258?
n/m found it
https://www.miataturbo.net/dynos-tim...4016psi-94488/
n/m found it
https://www.miataturbo.net/dynos-tim...4016psi-94488/
Last edited by JasonC SBB; 09-27-2017 at 06:52 PM.