new L31 crate motor to replace 87 5.7 tbi

[rfmaster]

For the record, the absolutely the worst thing you can do for L31 in originally equipped LO5 is to install a carb. Leave carburetors in 20th century where they belong. Enough said.

18 PSI spring is available from a number of sources - there are couple e-bay sellers. The one I have used before http://www.tbiparts.com/. In addition I like to run adjustable FPR from Jet Performance part # 61500 to dial in FP just right. You'll have to replace in tank FP to support highr fuel pressure. For the record L30 - the 5.0L version of vortec idles just fine with a pair of 5235206 injectors (found on 350 TBI trucks and rated around 62 lb-Hr @ 13PSI) at 17.5PSI in a 89 camaro. Engine is bone stock with GM performance intake and headers and regularly beats equipped TPI cars.

Finding a tuner is problem - Harris Performance is one option. The other option is DIY with EBL from Dynamic EFI. I prefer the later option since I tune my engines to suit my needs.

//RF