My 302, harness and computer came out of an'89 Mustang. The guy I am talking to about the engine has some 35 lb. injectors he would sell with it, but I wasn't sure if I needed them or if my 24 lb. injectors would do.
Texas Cobra Club-Austin
July 2009 FFCars Picture of the Month
FFR3542K, 347 C.I., Holly Systemax EFI, T-5, Modified 4-Link, Miata Front Sway Bar, Red with White Stripes
With a stock computer, 24# injectors are good to around 300 or so HP. I would expect a good 347 to make considerably more power than that. 35# injectors should be good to about 450hp, with a stock computer.
I would expect you would need a new tune with the new engine. If you're upgrading, you'll probably use a "bigger" camshaft, bigger heads, and more compression. Your current tune will be fairly with your bigger injectors. But it will only be fairly close.
A custom engine needs a custom tune. There's no off the shelf or out of the can tune that will work for you. If you want to get the most from that new expensive engine - and you want it to last - pony up the bucks for a dyno tune at a good shop.
We are running the Trickflow topend package (stage 1 cam, upper/lower intake, heads) with RWHP in the ~330HP range and run stock A9L computer, 24lb injectors with MAF to match and 70MM TB. You will need a variable fuel pressure regulator.
MKII Challenge Car, Spec Racer, Street Legal, 302 EFI, 3 Link, ICSCC, NASA and SCCA Racing
2012 ICSCC ITE Class Champion My Garage
Welcome to FFCars! The
representations expressed are the representations and opinions of
the FFCars.com forum members and do not necessarily reflect the
opinions and viewpoints of the site owners, moderators, Factory Five
Racing, Inc. or Ford Motor Company. This website
has been planned and developed by FFCars.com and its forum members
and should not be construed as being endorsed by Factory Five
Racing, Inc. or Ford Motor Company for any
purpose. "FFR", "Factory Five", "Factory Five Racing", and the
Factory Five Racing logo are registered trademarks of Factory Five
Racing, Inc. FFCars.com forum members agree not to
post any copyrighted material unless the copyrighted material is
owned by you. Although we do not and cannot review the messages
posted and are not responsible for the content of any of these
messages, we reserve the right to delete any message for any reason
whatsoever. You remain solely responsible for the content of your
messages, and you agree to indemnify and hold us harmless with
respect to any claim based upon transmission of your message(s).
Thank you for visiting the FFCars.com Forum dedicated to Factory