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Stock port, E85, Precision 6176 at 19 PSI

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Old 09-20-20, 05:40 PM
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Stock port, E85, Precision 6176 at 19 PSI

Here's a virtual dyno of my current setup. I feel like it's a little low on power for the boost level, I'm thinking it's my ignition timing or the smaller .81 AR housing. I'm running about 14 degrees timing at 19 pounds, I want to add a few degrees but I'm waiting until I get it strapped on the dyno. I ran a 13.2 @ 117 at the track with this setup with a slight clutch slip in 4th.

Anyone have any advice with timing? This is a 61mm turbo so I feel like it should be at least over 400whp at this boost level.

Stock port REW
E85
Precision 6176e, .81 P trim housing
1000/2200 injectors
AEM IGN1a coils
MS3X
Walbro 525

Stock port, E85, Precision 6176 at 19 PSI-bvx3uec.jpg
Old 09-20-20, 11:29 PM
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Why does hp start going back up after 7,000rpm and if power does start going back up why doesnt the pull go all the way to tje stock redline of 8,000rpm?

Asking because I dont know anything about virtual dyno but what I know about turbo rotaries is that 0.81AR would typically show HP fall off early like your virtual chart shows, but not recover in the high rpms.

Old 09-21-20, 09:41 AM
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Originally Posted by BLUE TII
Why does hp start going back up after 7,000rpm and if power does start going back up why doesnt the pull go all the way to tje stock redline of 8,000rpm?

Asking because I dont know anything about virtual dyno but what I know about turbo rotaries is that 0.81AR would typically show HP fall off early like your virtual chart shows, but not recover in the high rpms.
Virtual dyno creates a graph based off a datalog. I tried to do it on a relatively flat road but dips and bumps do sometimes show up on the graph. In this case, it could've been a slight decline at the top end.

I haven't been taking it to 7500-8000 due to the .81 housing and stock ports. It does feel like it's pulling up top and the datalogs also back it up so I'll probably try 7500.
Old 06-06-22, 08:46 AM
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didnt see any ignition timing numbers posted yet?
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