I had to replace my O2 sensor on the road Fri. night, check eng popped twice & power/instant milage reading went to crap. Parts house I found open after 5:30 PM only had the Bosch for a ZR1. But it was heated & fit the TPIS LT headers on my L98. Figured it was better than where I was. Gas milage went WAY up, hit 35MPG with the on board which I know is optimistic, but figure I still got 30 out of it.

Next AM, attended a dyno day at Synergy in Fremont (Thanks Guys!).

My bolt ons, stock bottom end showed 307HP at the wheels. Don't have charts w/ me but I think torque was close to 400? (will fix the details on this post tonight.)

How does that stack up againts stock or other modded L98s?

 

Okay, here are the correct figures from the printout:

Peak HP 308.5 @ 4619 rpm
Peak Tq 400.12 @ 3300 rpm

Any other L98 with just bolt on or even stock care to tell me how I'm doing?

 

That's freakin GOOD for an L98 man!! What all do you have done?!

 

Thanks, glad to hear I'm doing good. I had some good comments at the dyno but wasn't sure if they were teasing or serious. There were some awsome numbers from C5s way higher than mine.

I think all the mods are in my sig... I'll review & edit in a second

To clarify:

TPIS big mouth intake & runners, I matched the upper plenum, base & head intakes as best I could. No egr, air pump or plumbing.
Ajust. Fuel Press.
Port & polished stock 113 heads by me. So no big cuts just clean & polish. New springs, seals, guide plates & 3 angle valve job by John Peters Sr.
1.6 Harlin Sharp roller rockers
.029" corteco head gaskets (supposedly worth .5 compression)
New rings on stock pistons
TPIS long tube headers & Y pipe
Power effects cat back w/ valves set full open for the dyno pull
Stock cat with center of honeycomb cut out.
Accell 300+ ignition box & high output coil
Air pump eliminator bracket
March underdrive pully (crank, water pump & alternator)

Crank was polished but reinstalled origional bearing inserts. At 80K miles & synthetic oil its whole life they had almost zero wear. Machine shop said, "don't waste your $".

I think thats it but will adjust if I remember anything else.