98RedBird

iTrader: (77)

I'm getting ready to order an MS4 and set of PRC 2.5's from TSP. Right now I'm still on the stock fuel system, it's a 98 so it has the bigger injectors but I'm just wondering if I should upgrade the injectors and pump while I'm at it or if they might be good for a while. If it's not a necessity to spend the money then I'll hold off, otherwise, I'll just go ahead with it now.

Also, what pump and injectors should I go with if I do decide to go down that road? I see the racetronix with wahlbro pump getting alot of good feedback but I don't know about the injectors. Also, nitrous is in the future but not for a while. Probably about 150-200 shot. Thanks guys

caMnaro

iTrader: (24)

Well i have the racetronix plug and play kit and that should be good for close to 600 with the hotewire kit installed.injectors will be decided if you want a dry kit or wet kit.if its a dry kit your going to need bigger injectors then with a wet kit.

bigpapi211

iTrader: (4)

your gonna have to fly cut with the 2.5's just a lil fyi

Johnny1827

Im not a complete expert on the subject but here it goes.. You dont have to upgrade the injectors or pump now. However the injectors will be running at their max.
When you decide to put the spray on the car you will want to definitely want to upgrade the pump. If your run a wet kit you still wont "have" to upgrade the injectors but I would recommend it. As for racetronix or walhbro? Its your own decision. They are both good pumps.
I would think that 30lb injectors and a 255lph pump should handle a 200 shot.

rickyracer25

iTrader: (11)

i would say you are going to have to do now, you'll be at 90-95 duty cycle on just the cam.... i would know... when I did my ms4 cam swap Jason @Tsp said that the stock fuel system will max out at about 450-475 rwhp

I would do either 36lbs or 42lbs F.A.S.T. injectors and then tact on the
Racetronix F-Body Fuel Upgrade that tsp sells that should cure your fuel system.

Oh I hope you are either upgrading to a 90/90 or a ls6 intake if not you'll not see the full potenial of that combo if you don't

SOMbitch

iTrader: (8)

I think your gonna need at least 36#'s cause you don't wanna run over 90% duty cycle. There is a link to calculater that will figure it for you over in the fuel section.

Kenny H

I would definately do the fuel system now.

98RedBird

iTrader: (77)

Yeah, I know. I am having the heads milled and I plan on flycutting the pistons.

98RedBird

iTrader: (77)

Yeah, I already have the the Fast 90/90 on there.