don’t know if it was something with the trans or what but had a terrible flare right at the beginning of the pull regardless of what rpm I started the pull right at 3000 rpm it would flare up like shown. This truck has the heavy duty 4L80E and heavy 14 bolt 9.5″ rearend so its guzzling a good 25% worth of its hp which puts the flywheel numbers at 253hp and only 353lb of torque although that torque number could be off a tad because I couldn’t get a good pull in the lower rpms on this dyno. (Red Graph) Pulling 190hp and 265lb of torque at the rear wheels. But the initial dyno numbers were better than expected. Initial impressions, it feels wimpy for having a 4.10 gear with that little 28″ tire. This truck is very stock with original catalytic converters and even still has the smog air pump. So I found this nice completely stock 1991 454SS which has the same engine as all the other 454 TBI trucks just these made 20 more hp and torque because they got factory dual 2.5″ exhaust from the factory. I didn’t need a big dually truck and that would be hard to fit on a dyno anyway. Well I finally decided to do another TBI project.
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