What fuel management

[bikeman613]

i am starting to put together a tubo kit for my 420a i think im going to go with a 50 trim used garrett or someting off ebay but the real ? is what should i use for the fuel management im already planning on a 255 fuel pump. i am going to run around 7-8 psi with the stock internals any ideas. im also open to any sugestions on the turbo.

 

[nc90awd]

safc should be good. How ever I would recomend a walbro 190. A 255 will over run the stock fpr. A 190 is plenty for most people

 

[Gregory]

Garrett makes great turbos, but Ebay ones are known to blow quick (assuming you are talking about one of the "ebay turbo kits"). Some do last a while, but most don't. You are pretty much reaching over the whole spectrum of turbo quality when you say I'm going for either a Garrett or an Ebay turbo. Just trying to help. Not trying to bash anyone with a ebay turbo. Good luck with the kit.

 

[bikeman613]

thanks for the imput . what brand of safc do you guys have or think i should look into

 

[DSM36]

if your only running 7-8psi why go 50 trim? Go smaller itll spool faster unless your planning on running more later on, which if its a ebay turbo kit im guessing its a glued together t3t4, therefor you probably wont be able to boost it higher then that because it will blow apart. i set up a "ebay" t3t4 on a customers h22 accord, 12psi and the GLUE blew apart. when buying a new turbo because its such a expensive and important part be smart about it. In this world theres no good deals you pay for what you get and you pay to play.

im sure if your going to only be running 7-8 psi a 14b would b just fine.

 

[Ajax]

Just go with a Megasquirt system from the start bc later when you want to upgrade you would be stuck with something that cannot control timing which you will want once you upgrade the internals. I use to run the e-manage and had the same issue. And I am not the only one talk to BigRand he would say the same.

 

[bikeman613]

im not planning on buying an ebay kit. im planning on putting it together my self. i no what your saying about the tubo being an important part and there for it should be good and strong but i dont really want to spend 700 for a garrett. oh and about the smaller turbo i do want it to spool fast but isnt a 14b really small. i am planning on biulding the engine for more boost but not for like a year or two.

 

[Shadow98]

If you're only going to be running 7-8psi, you can go with a 12:1 FMU and a 255lph hp fuel pump. DO NOT listen to the 4G63 guys telling you to run the 190lph pump. Our cars are completely differant than theirs. BTW, a quick search would have given you the same answer(s) I just gave you. Also, post in the 420A tech section to avoid ignorant answers... Look at the profile of the other 420A turbos and my own for ideas for your future plans.

 

[bikeman613]

thanks im out of here

 

[bikeman613]

why cant i post any where but in the new section

 

[squall333]

Megasquirt might be a little much for anyone thats new. A safc or safc-2 is probably the best for what it does and its ease of use. Without a wideband and/or logger it limits what you can do.

 

[oldman]

why cant i post any where but in the new section

Because you're a new member, please read the forum rules, use proper grammar, punctuation and caps. I'm moving your thread to 420a bolt on section (new members can also post there) so you can get more precise answers specific to your application.

 

[Shadow98]

Megasquirt might be a little much for anyone thats new. A safc or safc-2 is probably the best for what it does and its ease of use. Without a wideband and/or logger it limits what you can do.

The safc is almost useless on our cars. But I agree with you on MS.

 

[BigRand]

For what your looking for start out real simple for now, until you decide where your gonna go with your car in terms of building it up OR NOT....

12:1 FMU, Walbro 255, and stock injectors....stick with that, and forget anyone ever mentioned the SAFC to you at all.

There are plenty of threads explaining why the SAFC isn't a good option, But essentially, for the cost and the effect it has on your car (both positive and negative) the negatives out weigh the positives.

 

[Ajax]

Yip def. would say the MS is hard its been about a month since my install and my car still runs like crap! But I believe once i figure out all the bugs it should be a great deal!

 

[4UH8ERS]

12:1 FMU, Walbro 255, and stock injectors....stick with that, and forget anyone ever mentioned the SAFC to you at all.
.

A 10:1 FMU maybe even an 8:1, would probably be the better option for your plans. BigRand knows his stuff, but the 12:1 is just overkill and causes extremely high fuel pressures that arent necessary for low boost applications.

 

[bikeman613]

so a 10:1 you think that would be a beter then 12:1 i wont run to lean.

 

[oldman]

so a 10:1 you think that would be a beter then 12:1 i wont run to lean.

I won't ask you NICELY again, please use proper grammar, punctuation and caps in tech sections.

 

[bikeman613]

Sorry it’s been a long day. Ill watch my grammar but I’m pretty shore that was the first time you said anything.

 

[oldman]

Sorry it’s been a long day. Ill watch my grammar but I’m pretty shore that was the first time you said anything.

Post number 12.

Because you're a new member, please read the forum rules, use proper grammar, punctuation and caps. I'm moving your thread to 420a bolt on section (new members can also post there) so you can get more precise answers specific to your application.

 

[bikeman613]

I no you have the power to kick me out and im really not looking for that but I would like to say that I think your kind of rude when it comes to grammar first im not that great with typing or grammar to begin with but because of this site and all the good people and info im trying to do my best so I can get some helpful info and all I get is a nasty message over two little errors. Im very sorry and I will have

 

[bikeman613]

to try harder

 

[oldman]

I no you have the power to kick me out and im really not looking for that but I would like to say that I think your kind of rude when it comes to grammar first im not that great with typing or grammar to begin with but because of this site and all the good people and info im trying to do my best so I can get some helpful info and all I get is a nasty message over two little errors. Im very sorry and I will have

Please point to exactly where I was being rude, it's my job to enforce the forum rules and I would say I have been very professional with you. We are not looking for perfection, what we are looking for are efforts, the longer you stay, the more you will understand the importance of the grammar rule. Now let's stay on topic.

 

[bikeman613]

Ok back on subject what should I use for 7-8 psi. A 12:1 or a 10:1 fmu.

 

[VelocitàPaola]

A 10:1 FMU maybe even an 8:1, would probably be the better option for your plans. BigRand knows his stuff, but the 12:1 is just overkill and causes extremely high fuel pressures that arent necessary for low boost applications.

Jake, what are you talking about? The stock ECU effectively loses all AFR feedback in boost. The only way for us to add fuel past in that stage is through mechanical means. Twelve extra psi of fuel for every 1psi of air pressure is as close to ideal as we can get without electronic intervention.

You may be able to get away with 10:1 ratio, but I wouldn't risk it.

You must be thinking of the maximum pressures the FMU will see, but you've also got to remember the lower pressures that the FMU operates under.

The 12:1 FMU only causes excessive line pressures when taken above 8psi of boost or so. Even then, you reach a point where the FMU is "overruns" the fuel pump -- the pressures can only get so high before the fuel pump gives out.