OK, I'll start. A preface before I go; my 88 C1500 5.7L was overheating during the summer a few years back. It turns out my Mr Goodwrench long block I've had in it for around 15 years (don't know the mileage because the odometer broke about 3 years before) had blown head gaskets. Anyway, I decided to see what I could do kind of on the cheap to my TBI to get more performance and maybe MPG. I didn't want to go Vortec or LS, just took on the challenge. Well, that didn't work out since everything I read about the TBI was interdependent on each other, from the top to the exhaust. I could have just replaced the heads any left it there but, what's the fun in that? I still had to keep it somewhat mild so I can pass emissions. Here goes starting at the top:
Bored out to 46mm Throttle Body with "Ultimate Mods" and 61#/Hr flow matched injectors running @ 20PSI, Edelbrock Performer 3704 TBI intake manifold, Spectra Premium distributor (junk) now with AC Delco ICM, cap, and rotor. Pertronix coil (went bad in ~2,000 miles) now Accel coil. Summit Racing (made by Trick Flow) 170/69cc runners, 2.02"/1.60" valves, 62cc chamber TBI aluminum heads, Lunati Voodoo 10120700LK cam with 1.6 full roller rockers, shorty headers, mandrel bent "Y" pipe to 3" high flow cat and 3 chamber muffler. EBL Flash2 ECM (after trying to make the OE 1227747 work with 27SF512 flash chips but it's just too slow - 160 baud rate as apposed to 8196 IIRC), 2300 - 2500 stall TC, phase 2 700R4 (600HP rated after I blew the 1st one), 4.11 10 bolt rear end and 275/60R15 tires. I don't know how much HP it's putting out but I cut over 4 seconds off my ETs and it's a lot more fun to drive. Next I'm probably going to get a Lunch Box locker or a Detroit Tru-Track differential since I can still roast the one tire that spins, ha ha. I spent way too much money on this build but learned a hell of a lot about the TBI system. Sorry for the dissertation...