how big injectors and much boost can i raise before i need a fuel pressure rugulatorand a fuel pump.....getiing injectors and boost controller

 

That's a tough one because every motor is different, but it's usually a 50/50 chance.
There are different combinations of fuel setups that will require or won't require an AFPR with "larger" injectors.
190lph + 550cc= you can get away without an AFPR
255lph + 550cc= this is where the 50/50 chance is usually found
190lph + 650cc+=You'll need it to keep from hitting fuel cut......AFPR needed
255lph + 650cc+=You're most likely hitting fuel cut at 17psi, lol. ...AFPR needed
In any case, I will always recommend an AFPR when the pump and injectors have been upgraded. Why? Because, that's a lot of fuel flow to the rail and injectors. The stock FPR is the bottleneck (there's more to it than that, this is the bottom line version). Once you upgrade the FPR, look at the hole on the rail adapter and the FPR hole. They are tiny compared to an Aeromotive. The entire housing of the stock FPR is tiny compared to just the cavity that the fuel sits in on an aftermarket FPR. I have a friend (who I refer to a lot) with a DSM and he's got an EVO9 fuel pump with 660cc injectors (I think or 650cc) and a stock FPR. He's still on the stock FPR and he won't listen to me, lol.

IMO, don't get injectors and install them, without the rest of the fuel setup. That's how you half *** a mod build. If you just want to get them anyway, just put them on a shelf until you beef up the rest of the fuel system. It won't take you long to get a pump and AFPR kit. Don't rush your mods.

Besides that, if you're still on the stock turbo, 16psi is about all that you can do or you'll just be blowing out very hot air and just cause more knock. Follow the recommended mod list, don't jump ahead until you have support to do so.

 

thanks alot !damn your smart ...haha...so can i get a boost controller and raise it to 16psi without hitting fuel cut ..and also of topic but sometimes when i push my clutch in it makes a sound kinda like power steering ......when you need fluid and also sometimes my car can come out of gear without the clutch <hm...

 

well as of right now im hitting something like fuel cut which i explained in my other threads ill be accerlerating and once i hit boost or high rpm then bam!!!(scared the **** out of me) i hit a wall followed by a loud pop...i changed plugs wires and vacume lines dont understand if i havent raised my boost why am i hitting fuel cut i also got pump checked and they said it was fine also fuel filter dont know how to go about this ..also in my other thread i talked about wastegate solenoid<<was told was bad and causing this fuel cut??<<<then someone in the forum told me he mght have ment the bcs..the same??dont know jut want to continue modding my dsm without having to rebuild the whole damn car again...just got inserts....waiting to see if i can get a mbc and maybe fix my promblem...any feed back very appreciated

 

Try getting a 255 (not high pressure) fuel pump

 

ok now if the fuel pump doesnt work should i get a new dsm..this **** is just pissin me off ....i cant race or beat hondas under these conditions...haha..sorry just wanna ge top performance and stop fixen the wrong things