Don't know if this is much help as I don't have results yet, but:
_HOT_M16 said:
1.) What is your setup. (control type, injector size, boost levels, any tampering with the afm?)
Megasquirt for fuel, 440s off a mk3t, hoping for ~10psi, no afm
2.) How does it perform? Do you have dyno sheets with integrated A/F ratio?
Don't know yet. It sure squirts good while cranking! But my motor won't run yet-- ignition problem.
2.5.) How economically does it perform? Have you recorded any mileages? Any rich/lean conditions off-boost?
Don't know yet but it *should* run pretty well! very tunable!
3.) Were there any major drawbacks with your method?
Lots of prep work and wiring. A full weekend of assembling the megasquirt, another weekend of wiring (which could be done more easily if stock harness is used). Need an IAT somewhere and coolant temp sensor calibration.
4.) Total cost of fuel system alone?
hmm
$200 for megasquirt parts, add maybe $100 if you get someone to assemble it and get a cable made.
$50 in wiring, solder, etc, if planned well
$80 for injectors (new! go to
www.surplusparts.com, must pay $50 proc fee tho), using old clips (bad idea i think)
$30 for an IAT, coolant temp sensor and pigtails (pigtails you can get from a yard... they're like $9 otherwise!!)
ought to have a laptop for tuning though not necessary
megasquirt project can really add up quickly if not planned correctly, but otherwise has a good price/perf. ratio if ease of installation isnt key. i definitely spent more on wiring because i just made frequent trips to auto parts stores with overpriced electrical supplies. it also took me a good amount of research and stuff to be confident assembling it and putting it in my car but i really didnt know much about engine managemetn or electronics or anything going into it. a fuel pump might be a necessary next upgrade though maybe not with 440s 'cause the pressure can still be 35-40psi.
If you must know, I have finally broken down and am purchasing a turbo for my blackpra. I am collecting parts for a custom 3" mandrel bent downpipe, oil lines (might just giveup and buy a RabidChimp set...), and looking around for intercooling options. Fuel is only needed up to about 7-10psi. Whatever I can squeeze out safely. Tuning will be done on a dyno.
cool, man.
aaron g's making me a turbo back downpipe for a pretty good price, if you don't have one lined up already, you might want to talk to him.
if you get a turbo with the stock oil lines, i bet you could get away with cutting them, flaring them *slightly*, bending back the ridge, and hose clamping something to them really tight. i flared mine too much and i think the edge of the metal tube is eating into the hose but i ghettoly tested them with water and compressed air and didn't have any leaks... it's a free set up pretty much. if you didnt wanna do that your best bet would be rabidchimp kit... i tried 5/16" compression fitting on teh stock lines, which leaked, they did for Phil D. as well, and it'll probably be hard to braze a brass fitting on those aluminum lines.
let me know what you find as far as intercooling options go. i was originally going to try a volvo or mk4 intercooler but hte piping seemed like it would just be an awful task so i'm using a mk3. if anyone wants a volvo or mk4 intercooler let me know
although i haven't run mine yet, i do wish i got arp studs and a new head gasket. i also wish the rod/stroke ratio of the 6m wasn't so small and i didn't keep hearing stories about < 100k 6 and 7ms with rod knock.