Alfa Romeo Bulletin Board & Forums - View Single Post - My Megasquirt recipe for Alfa Nord 4-cylinder
View Single Post
post #24 of (permalink) Old 09-11-2017, 08:10 AM
65Sprint
Registered User
 
65Sprint's Avatar
 
Join Date: Jul 2004
Location: Fountain Inn, SC
Posts: 1,090
As Ed points out, at some point air flow to the intake probably becomes a limiting factor in an L-Jet Spider as was the case in the 3L GTV6. But at what state of tune? 160hp? 180hp? Jason's effort may help answer that question.

I am running stock L-Jet with 10:1 (nominal) Motronic pistons and a set of Richard Jemison's cams in the '88 Spider. Recent tests confirm the L-Jet is able to maintain a wot AFR around 13:1 through 6500 rpm ... no lean mixture issues. Compared to Ed's and Jason's engines, my changes are quite mild but the car is much more enjoyable and for the first time in 29 years the engine likes to be revved above 5000 rpm.

Rich Hanning
'65 Sprint GT, '78 Spider, '88 Quad
65Sprint is online now  
 
 
For the best viewing experience please update your browser to Google Chrome