I'm right up the road if you go that route and need a hand man

My goal was first around 500 which is attainable by a centri which i have but im in ur boat as well

I will be enjoying my 380rwhp car and im gonna start building an engine on a stand set up to hold at least 800 crank then tranny to match

Then when it goes in the centri and fuel system will be pulled and sold to pay for a turbo set up

I love my centri blower, but I know turbo will make much more power per PSI. I knocked this Idea back and further aswell. But when you add up everything you need its just not worth that money. when you have to get a tubular K member, bigger injectors, dual pumps, get 3.27s again and the turbo kit your looking at roughly 3.5k to 5k in parts and labor. Unless you have goals of over 600rwhp a centri will do just fine with OD crank and small pulley.

All I'll need is the on3 kit. I have everything else. No need for bigger injectors and pump when I im still on stock bottom end. I have everything I need besides the k member. Still have my 3.27s, I figured I would hang on to them just in case. Basically I just need the on3 kit and a tune and I'll be good to go till I build the motor.

you have a tubular k member? and what size are your injectors? I dont know how you enjoys that novi with those really long gears. takes a life time to build boost lol. depending on what power lvl you want anything over 450 you will need 60# injectors. Whats your fuel system set up?

I won't be over 450rwhp, I don't have the k member. That will be my only expenses besides the kit. No don't have 3.27s anymore. I have 4.10s, I just ment I saved my 3.27 instead of selling them. 42# injectors and division X 340, if anything I would just need a bap but I doubt I'll need it. I'm no where near maxing my fuel pump right now.

only thing that you will be cutting close is with the injectors. the 340 is a very good flowing pump so you are set.

Shouldn't be close at all. Only looming to run 7-8 psi. That should put me in the 3 80 - 400rwhp range.

Yeah, I'm at 410 (probably a bit more now with the new stall that can actually lock up at WOT) and my 39# injectors are fine. FPDC is at 94% though.

you'd be making 450 through a manual so I'd say I'll be fine.

42's will take you to 500. Some have made 525rwhp on 42s, a single pump, and bap.

with a turbo set up? not likely since turbo is is much hotter. 500 is alot to ask for even for a centri. 450rwhp on a turbo is cutting it close for 42# better to be on the safe side and get some 60#

---------- Post added at 10:51 AM ---------- Previous post was at 10:49 AM ----------

more heat = more fuel

LOL WUT?



If my little 4 banger can make 300+ with 42lb injectors, the 4.6 can make 500.

There's some new parts out there that allows you to cool air down that was previously heated up by a compressor. It's called an intercooler.

Also, more heat = /= more fuel, no matter how you look at it. Hotter air entering the cylinder actually calls for LESS fuel because hotter air is less dense. This is why you cool the air down to increase its density and allow you to burn more fuel efficiently. A richer AFR burns colder than a lean AFR. The more lean and oxygen rich the mixture, the hotter it burns. Heat = energy. (this is how nitrous works btw)

The 42s will make more power than the stock bottom end can safely handle. I wouldn't worry about them.

you dont say?
Yes I know the intercooler cools temps because I have one. My 42# injectors are at 87% Less fuel more heat. Unless you want to lean out and melt a piston by all means do so. just because your 4 banger can do 300+ doesnt mean a 2v 4.6 can. That math doesnt apply to this. different motor, different timing, different CR. At the end of the day its his car.OP wrote 450rwhp. that leaves him around 95% to 96%. If he wants to risk it by all means.

While it is true that we're talking about a 4.6L turd-valve, I have personally seen one make 500whp with a Cobra pump, BaP, and 42s. I wouldn't even bat an eye at 450whp with 42s, especially if he has cams. Tune the car well and go have fun.

How much power is your car making? I'm at 75% with 39lb cobra injectors at 411rwhp.

I made 489 no problem on 42's with my Kenne Bell @ 15.6 psi. 340lph pump with a boost a pump to be safe.

Good luck on your turbo build. Believe me man you will run into a few more things that will cost you some cash. There is always some shizz with turbo setups but it's all worth it in the end!

I went from a Procharger to a turbo and won't ever build a non turbo car again. Even for a stock engine the turbo is better in all ways hands down.

I'm wishing I went turbo as I probably have over 1100 just in the belt drive setup for the belt slip issue. (I.W balancer, thump tensioner, 8 rib conv). Plus long tubes and the 2k in the vortech kit. 3500 could have gone a ways towards a turbo kit.

You and me both I have spent thousands on the Centri setup just to end up spending thousands more cause the centri didn't have enough steam to get me over 800