Went to the public scale today I was kind of surprised at first...

3800#! << porky Then thinking about it.. added turbo, turbo manifold, intercooler, 4" exhaust system out to the back bumper, charge air plumbing, and NO2 bottle.

If I remember correctly I think with the 292 the truck weighted 3550# but I never wrote that number down so its fuzzy.

So at 3800# and 98.3 mph == 280RWHP >> 360ish at the crank. Density altitude was around 3800' so I think this HP # is about right. It line up with what the goofy chassis dyno reported.

Before I installed the turbo the truck ran the same ET with the stock 4200 as it did with the tricked out 292 (ported lump port head big valves, cam, offy, holley 600, & headers).

Last edited by efi-diy; 10/13/08 03:02 PM.
51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them