I went to the dyno on Thursday morning. Most of you guys have already seen this graph in "private" but for the rest of you, here it is:
The graph says "flywheel torque" and "flywheel horsepower" but it's just mislabeled.. It was a chassis dyno; so this is actually horsepower at the wheels. I didn't take my motor out to get a baseline run .
I have the AFRs in another chart, they were getting leaner than I wanted up top and were too rich (11:1) down low (about from 3k - 4k RPM) where I also experienced a torque decrease after putting on the custom intake.. so I should be able to stay safe on the top end and gain some low end torque back after I tune it.
It's a 1993 3.4 DOHC with:
.030" overbore
Sealed Power hyper-eutectic pistons with coated skirts
ARP rod bolts
Balanced and blueprinted
Ported lower intake manifold
Short-runner upper intake with 3" pipe plenum
3" aluminum intake pipe to K&N cone in the fender well (with the TB all the way open its 3" of pipe directly to the runners )
Decked heads (.014")
Stock cam timing
Stock throttle body
BCFA chip with slightly leaner fuel curve in power enrichment (similar to Ben's performance chip)
2.5" exhaust with Spintech single-inlet dual-outlet muffler and 2.5" magnaflow cat
Getrag 282 with Quad 4 gears
My 3.4 DOHC dyno run
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- Series8217
- 1988 Fiero Track Car
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