I trading my 99 accord v6 for a guys 94 hatch with a ls turbo in it.. i dont know much about this fmu thing... but i ahve heard it f*&ks stuff up.. my question is....why? the car has a b18 computer in it im pretty sure. on the side it says p75 if im not mistaken..i only glanced at it. but i wanna know what should i do about this fmu thing?
Fmu?
- Thread starter 94eg02wrx
- Start date
Fuel Management Unit. I ran one temporarily before I got a chance to tune so there would be no chance of me running lean. I used a 10:1 FMU.
Get rid of it and get it tuned.
Get rid of it and get it tuned.
I just use a Blox FPR and call it a day.
forgot to add that
so its either way im gonna wanna get it tuned i know this. he said the p75 comp is tuned for intake headers and exhaust... i am wanting to hit 10lbs when i do get it tuned. and its never gonna go above that. my other question is... what injectors should i use that arent over kill? and is 10psi safe on a stock bottom end?
well the rod bolts are the weak link for LS engines, but good for boost. The P75 is the correct computer but a few questions arise from your response.
1. are you sure your ECU is chipped and socketed for a tune (Intake, header and exhuast doesnt need a tune)
2. If it is chipped, make sure its a SST or equiv REFLASHABLE chip (it will say SST on it)
3. What did the guy say he used for tuning?
4. Make sure you replace the fuel pump to a higher flow.
5. 440cc injectors are fine for what your looking for..
Here >>> http://www.xenocron.com/fuel-pump-injector-combo-p-244.html
Edit: anything you need you can get from Xenocron.com or go-autoworks.com
1. are you sure your ECU is chipped and socketed for a tune (Intake, header and exhuast doesnt need a tune)
2. If it is chipped, make sure its a SST or equiv REFLASHABLE chip (it will say SST on it)
3. What did the guy say he used for tuning?
4. Make sure you replace the fuel pump to a higher flow.
5. 440cc injectors are fine for what your looking for..
Here >>> http://www.xenocron.com/fuel-pump-injector-combo-p-244.html
Edit: anything you need you can get from Xenocron.com or go-autoworks.com
Billy.
Has returned ;-)
Registered VIP
Registered OG
5+ Year Member
10+ Year Member
15+ Year Member
20+ Year Member
if you bought the car like it is then the first thing i would do is take it to the local dyno shop and put a sniffer in its butt. if it's running fine then leave it the hell alone
if it's not running fine, you need to figure out what the ecu was tuned with (which software) then find a shop that is capable of tuning the same software. let them do a preliminary assessment of what the motor needs to get it running right. the stock ls should be capable of handling 10psi on most mild-moderate sized turbos. like ^^ said, the weak link on a ls block are the rods, so i don't suggest trying to make more than 220-240whp without doing some reinforcing on the motor internals, like rod bolts at the least.
as for fuel delivery, the stock civic pump is good for about 300whp (i'm personally using stock pump making ~280whp), but the injectors will be a weak link. you need at least 440cc, but bigger is actually better. you don't want to push over 80% capacity on your injectors, so i suggest going bigger. i use rc 650cc
if it's not running fine, you need to figure out what the ecu was tuned with (which software) then find a shop that is capable of tuning the same software. let them do a preliminary assessment of what the motor needs to get it running right. the stock ls should be capable of handling 10psi on most mild-moderate sized turbos. like ^^ said, the weak link on a ls block are the rods, so i don't suggest trying to make more than 220-240whp without doing some reinforcing on the motor internals, like rod bolts at the least.
as for fuel delivery, the stock civic pump is good for about 300whp (i'm personally using stock pump making ~280whp), but the injectors will be a weak link. you need at least 440cc, but bigger is actually better. you don't want to push over 80% capacity on your injectors, so i suggest going bigger. i use rc 650cc
I poped the top off of the computer and it has an atmel chip on it... i havent looked again to see if it is a reburnable one but i will soon. and yes i do intend on getting bigger injectors.. i have 2 ls heads and some aftermarket headers id sell for the money to get some dsm's. but i just havent had time to put them on ebay.
i dont know what he tuned it with i never asked.. it runs like a champ but thats not always the case. i found out the hard way with my wrx....
.
thanks for ur guys input i will tell you the update and get some pics up of this thing and u guys can tell me whatyou think.
i dont know what he tuned it with i never asked.. it runs like a champ but thats not always the case. i found out the hard way with my wrx....
.thanks for ur guys input i will tell you the update and get some pics up of this thing and u guys can tell me whatyou think.