Ok. I'm looking to get some ideas... everybody that has TPI, please list these things: * model info, year, etc * your mpg average for city and hwy if known * whether or not your using OBD1 or OBD2/0411 PCM, if OBD2, post your tune if possible, or an excel spreadsheet with VE table or anything helpful about your tune * all engine mods including camshaft, heads, intake changes such as porting, injectors brand and specs * rear gear ratio and transmission * any disabled emissions equipment including cats and whether single or dual exhaust, type of mufflers * hp and torque with rpm peak for each, esp if dyno'd. if no dyno, then your estimate If enough people post, it would be very helpful, esp excel spreadsheets of VE tables on tunes relative to engine mods. Thanks!

* 89 IROC
* city: 12mpg hwy: 16mpg
* OBD1
* 87 L98 Block, 89 081 heads ported and polished with valve job and upgraded .55" max lift valve springs and full roller rockers, stock 89 TPI intake port matched, 24lb gmpp injectors and a Comp Cams CS XR264HR-12 Camshaft
* 3.45 rear gear/t-5
* currently manifolds (for break in) and straight pipe back smog pump, cats and A.I.R. are removed
* 350hp @ 5000 490ft-lbs @ 3000 about 275rwhp

My numbers should jump up once I finish break in and I install my headers and an official chassis dyno is coming after my new tranny is in