Temporary fuel set-up

[Blitzeclips]

Hey guys was wondering about a temporary fuel set-up until I actually install and tune the MSnS. Unfortunately my tuition just went up almost 20% so I'm going to have to wait to install MSnS. I've done some searching on here and 2gnt.com but I can't seem to find a definitive answer on the amount of boost an SFMU can support. I saw one guy actually ran 25psi on one, which I wouldn't try but that's pretty surprising. Here's the general set-up I've come up with. SFMU (not sure what disc), adjustable fuel pressure regulator, 550's, possibly 440's (let me know what you think) and possibly an SAFC for temporary tuning purposes. Not sure. I would like to run 17psi if possbile and safe. I already have a 255lph fuel pump (which I need to re-wire) and all necessary gauges. Wideband o2, fuel pressure (in cabin), EGT, oil temp, boost, and oil pressure.

a) would 550's support 17psi and if so, would my car idle with the excessive fuel?
b) What psi can the SFMU safely support?
c) Would I need anything else with this set-up, and if so, what?

Thanks to all who reply. It is greatly appreciated as always.

 

[VelocitàPaola]

I can see you reaching 14psi rather easily with an S-FMU, but 17psi might be a little much without getting into ignition tuning.

Also, you don't need an AFPR AND an S-FMU; it's one or the other.

 

[Blitzeclips]

I can see you reaching 14psi rather easily with an S-FMU, but 17psi might be a little much without getting into ignition tuning.

Also, you don't need an AFPR AND an S-FMU; it's one or the other.

Really? I thought you could use in in conjuction with the other. Would an APFR assist with fuel pressures and tuning at all? I need to buy one for MSnS anyways... I'd like to have everything/anything that would help while I can.

15 psi sounds good though. I'd like more, but can't.. If I were to get an igntion control (retard/advance) what could the SFMU handle up to?

Anything else that anyone would recommend?

 

[totaleclipse_05]

Mike on 2gnt ran almost 20 psi on an SFMU setup with 440's. I would maybe give him a msg on AIM about it.

 

[BigRand]

If you don't already have the SFMU, I wouldn't bother paying for one just to run more boost in the mean time. Lets say you buy your SFMU and 440cc injectors, well when you go MS and buy the 1:1 afpr, and maybe you start out using your 440cc and decide you want to go with 790's so you can run 20+ pounds of boost.

I think that if you were to stick with whatever your running now, after you pay for tuition and such and save up so cash, you'll be pushed to get that MS in even faster.

Trust me man, my tuition just went up too and I feel your pain, sorry for not answering any of your questions in specific....but here ya go

Don't bother looking for the SAFC for any temperory tuning, as you'll just have to hack up your nice wiring harness...and you wouldn't want to have to do it twice when you go to MS......this is coming from experience (SAFC2, Emange, MSnS)


The 550cc should support 17psi with the right disk in the SFMU, however when you switch to MSnS and if you have a turbo similar to mine, you'l find out that 17psi is going to be pushing it.

I'm not actualy sure how big you can go with the SFMU in terms of injectors size and still get the car to idle.

 

[Blitzeclips]

Thanks guys for the replies, again I really appreciate it.

The blunt truth of the matter is that I probably can't go MSnS until atleast another year. I drive the car to school and work daily and I need it to continue running. I.E- No pushing the limits of the motor to risk a rebuild. Because I can't afford it. Also, I'm finishing up my degree in DE and passing emissions here is hard as hell. I don't even think I will pass with my car as it is now. Also, I am not experienced enough to install MSnS so my own, so i can count that one out. So I want it done right if it's going to be done at all. Which means I'll be heading up north for install and tune of my car after MSnS, but that's not for a while. When I actually make that trip I won't be coming home until I hit 400whp. Period. Again, that's not for a while. In the meantime I'm going to finish some things I've wanted to that won't risk engine damage, etc. Like finsihing my interior, wheels, suspension set-up, etc..

I'm probably going to run 15psi with the SFMU until I graduate and get a job around my career field and start making an actual salary. Then I'll buy a nice DD and keep the 2gnt for track use and as a show car. Believe me though I think it's going to be fun to see how much HP I can squeeze out of the car at 17 psi. I'm looking forward to that. I'll probably put Paul's manifold on the dyno to see some gains, then a bigger TB, and eventually a small shot of nitrous. I'll go 8psi off the line then 17 once I catch some sort of traction. I am hoping for low, low low 13's or high 12's with this set-up. I honestly thik I can get there.

But yeah, that's why I'm going the SFMU route.

 

[cs82685]

I drive the car to school and work daily and I need it to continue running. Also, I'm finishing up my degree in DE and passing emissions here is hard as hell. I don't even think I will pass with my car as it is now.

Ya know Mark was showing me his setup and has retained the stock ECU where he can switch back and forth between the MS controlling the car and the stock ECU controlling the car. He said he's taken it through emissions and everything. Although I guess still being on stock injectors does make smog easier. I didn't even know you can do that. It's definetly put the MS bug in my head.

Anyways, the largest injectors I've heard of being used with the stock ECU were 550's with safc to control the idle. Otherwise 440's or dsm 450's are the max, but at least you can get 450's for cheap. And no, you don't need an afpr in conjunction with SFMU. If you are definetly going SFMU, I wouldn't go larger than the 450's just so you don't have to bother with an safc when you're going to remove it to install MS down the road.

Edit: Damn, just realized this is a week old thread.

 

[xceler8]

Here's my suggestions...

Go with the MS, or don't waste the money. Ms is a lot of fun and not too bad if you really do your reserh on it before hand. I didn't spend too much time getting my car to run decent. It's a continuing process so your always finding things that work better and changing them. I'm constantly starting my map over and messing with new ides.

You already ahve to run a return fuel line with the sfmu, just the same as the 1:1. I say, get the 1:1, don't waste money on the sfmu which you'll have to just sell anyways. Run the ms on jsut fuel only and save the spark for later.

Keep in mind that different turbos run different amounts of hp at different boost levels. Bigrands turbo spooling 16 lbs is similar to mine at 10 lbs. I'm maxed on my 440's at 10psi or so. I can always get my map a little leaner since it's rich, but it's jsut part of the world of tuning!

I'm I correct in you saying you don't wanna rebuild as a result? I seriously hope your already built,otherwise your dreaming of running more than about 8psi!

If your looking for some nice high impedence 42lbs injectors (440cc), I will have some for sale shortly... pm me-