'86 Sport/light mods dynos
Thread Starter
Rotorphile.
Joined: Mar 2002
Posts: 1,296
Likes: 0
From: Richmond/NoVA
'86 Sport/light mods dynos
About a week ago, some of the guys over on the protege board had a meet and wanted to make sure they got the group rate, so I tagged along and ran the dyno.
mods:
CorkSport catback and midpipe
cone intake
Six ports wired open (temporary, until I get the 13BT in)
No A/C, PS, airpump
Sorry I don't have a scanner, but here's the numbers:
Dynopack (no roller) dyno
RPM/ Horsepower/ FLYWHEEL torque
2400 - 46 - 117
3000 - 58 - 118
4000 - 74 - 112
5000 - 103 - 124.3
6000 - 112.33 - 114
6800 - 106 - 95
In all, 112.3whp@ 6083RPM and 124.3lb-ft flywheel@5052RPM
It was odd that they gave me approximate flywheel tq instead of wheel torque, but whatever. I was somewhat dissapointed in these numbers, since the last time I dynoed was with a stuck six port '88 which got 96hp/105tq. One of the guys mentioned I may have a clogged precat, and sure enough, the front precat broke down and clogged the second. I caught word that a new shop opened this past weekend, and was giving free dyno runs.
New mod:
Gutted precats
Dynojet (roller) dyno
RPM/ Horsepower/ Wheel torque
2800 - 50 - 90
3000 - 55 - 93
4000 - 76 - 102
5000 - 104 - 108.2
6000 - 117 - 105
7000 - 115 - 87
In all, 120.1whp@ 6500RPM and 108.2lb-ft@ 5000.
By gutting the precats, not only is my car stupid loud, it has 8 more peak horsepower. The charts go rich past 5k, so I figure more can be made with a fuel controller and leaning it out up top.
When I crunch the numbers though, I still only come up with 141.7 hp and 127.6 tq at the flywheel, still both shy of the 146/138 it is supposed to have stock. Besides my 3800 stumble that shows in both charts, what do you guys think? (I'm just generally debugging now, the 13BT swap is coming in in a couple months.
)
mods:
CorkSport catback and midpipe
cone intake
Six ports wired open (temporary, until I get the 13BT in)
No A/C, PS, airpump
Sorry I don't have a scanner, but here's the numbers:
Dynopack (no roller) dyno
RPM/ Horsepower/ FLYWHEEL torque
2400 - 46 - 117
3000 - 58 - 118
4000 - 74 - 112
5000 - 103 - 124.3
6000 - 112.33 - 114
6800 - 106 - 95
In all, 112.3whp@ 6083RPM and 124.3lb-ft flywheel@5052RPM
It was odd that they gave me approximate flywheel tq instead of wheel torque, but whatever. I was somewhat dissapointed in these numbers, since the last time I dynoed was with a stuck six port '88 which got 96hp/105tq. One of the guys mentioned I may have a clogged precat, and sure enough, the front precat broke down and clogged the second. I caught word that a new shop opened this past weekend, and was giving free dyno runs.
New mod:
Gutted precats
Dynojet (roller) dyno
RPM/ Horsepower/ Wheel torque
2800 - 50 - 90
3000 - 55 - 93
4000 - 76 - 102
5000 - 104 - 108.2
6000 - 117 - 105
7000 - 115 - 87
In all, 120.1whp@ 6500RPM and 108.2lb-ft@ 5000.
By gutting the precats, not only is my car stupid loud, it has 8 more peak horsepower. The charts go rich past 5k, so I figure more can be made with a fuel controller and leaning it out up top.
When I crunch the numbers though, I still only come up with 141.7 hp and 127.6 tq at the flywheel, still both shy of the 146/138 it is supposed to have stock. Besides my 3800 stumble that shows in both charts, what do you guys think? (I'm just generally debugging now, the 13BT swap is coming in in a couple months.
)
s4 for life
Joined: May 2002
Posts: 2,516
Likes: 1
From: Oahu
Do a compression check. Easy to do with a standard checker. This will eliminate the possibility of low comp as a factor. Most people don't check this when they get lower than expected numbers. With a 18-13 y/o engine it is almost a sure thing to have low comp.
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