Is it as simple as when you start to run lean or I want to run more than factory 10 8 10 on the twins?
I ask because while I am doing my build and doing different sections I want to replace things for what is to come in the near future. I plan on running no more than 8 until I get my IC upgrade and PFC. I will probably stay at 10 for awhile after that. I will focus more on suspension, wheels/tires, and small details. Then of course I will be back wanting more.
Will injectors duty out before pump? I am continuing my research, but I got some conflicting info.
I think my concern is what steps to take in what order. I probably won't mess with a single setup for a very long time. I most likely will upgrade with BNR.

Current power mods are slight porting and just the simple bolt ons minus IC, PFC, and anything fuel related .
What would YOU do next??? All cooling is handled, rats nest gone.

 

From what I understand fuel wise is I do not have to think of messing with injectors. Upgrade the fuel pump is a possibility, but other than that staying sub 400HP all should be good...

 

The secondary injectors will be the 1st thing to be overwhelmed. I'm sort of in the same boat as you and I'm waiting on a set of 1300ccs for the secondaries. The stock fuel rail will work, so no real need to upgrade that. A Supra fuel pump would be next on the list.
I'm shooting for a reliable, driveable, 300 to the wheels and my FD has a street port, sequential BNRs, PFC, upggraded SMIC, downpipe+hiflow cat+exhaust and a stock intake.

 

Thanks Natey,
From what I understand you don't or shouldn't even need an upgrade for 300whp. I figured stock pump should be good around 350ish and need injectors to go into high 300s/400
What are the cons of running a bigger fuel pump? I have no issues with upgrading pump, but I have no idea of any cons of there are any.

 

on one of my past FD's I just ran a PFC with base map, racing beat dual tip, high flow cat, and greddy smic. it was a pretty quick and reliable car.

i would just get ohlins and nice tires after that and enjoy the hell out of the car, maybe set up a way to monitor all your temps (especially intake air temp) and try to keep things cool

 

Read Banzai Racing's thread where he modifies a car step by step. They were able to get to about 350hp with a fuel pump upgrade and I think they may have done a fuel pump rewire.

A lot of it comes down to being able to tune the ECU well. If everything is tuned properly and safely the car will be very happy and run a long time. No or sloppy tuning causes problems.

Dale

 

Thanks. I may replace the fuel pump anyway so to age, and from what I have read the supra pump should be fine as a stock replacement. Easy and should not have any negatives that come with it even if everything was left stock.
Pettiit will be the one turning.
So other than the IC, pump, and PFC she will be painted and sit in my garage with hours and hours of suspension work and small intricate details!! I will have to start my research on that. I feel so ignorant with the FD. My FC was dialed in and I knew that car so well!!
Thanks for the help everyone.

 

Definitely rewire the fuel pump for a direct feed, it's a cheap and easy modification.

Also if you're going to buy a Supra TT pump, the GST450 isn't much more expensive and is a lot more pump for the money. One of those will effectively future proof the pump side of your fuel system.

 

Thanks for the info. Is there a draw back if running a higher pump before it is needed? Sorry for the noob question. I am still trying to figure things out. Obviously the pump is capable of higher flow, but the ECU will keep it in check unless the extra flow is needed? Hope my question makes sense

 

Pump pressure is controlled by the FPR, the ECU doesn't have any way of measuring fuel pressure or flow to adjust it (assuming you're running a stock ECU or a PFC, more complicated ECUs can log fuel pressure).

I can't see any real downsides to running more pump than you need. Noise maybe, and current draw. Those GST450s are a bit lairy and draw quite a few amps.