550s ???

[maitai69691]

is it allright to upgrade to 550s, areo FPR, and a walbro and just go and drive or is there any tuning involved.

[tookwik4u89]

Going to run rich without at least a lexus afm, search....theres a ton of threads on it.

[foreverpsycotic]

IIRC you will still run rich with a lexus AFM. you should use an SAFC2 or use maftpro without the AFM in speed density

[jam4484]

you will run rich with out the lexus afm. The 550's flow 25% more fuel so the lexus afm is used to flow 25% more air that is needed to match the increase in fuel.

Jon

[MKIIINA]

bam!
http://www.supramania.com/forums/showthread.php?t=25604