97stanger

my hp goals are 500-550rwhp. I really dont have a boost goal, as the lower the boost and more power i make the better. I can imagine I may have to go to a 8 rib setup though. I already run a 3.12 6 rib. I guess my limiting factor will be my fuel setup then. I think at first while my motor is out of the car I am just going to do the forged internals, decide on which route with the heads I want to go, and install my blower cams and put the motor back in the car and get it tuned. I'll see where I'm at and take it from there. I was at a little under 400/400 with just stock PI cams and stock non pi heads so I am guessing I will be in the 450rwhp range. In time than, I know I will have the motor to handle anything I can throw at it so I can always upgrade my fuel setup and add meth, 8 rib, or whatever I decide to do.

teej281

Well...with just the blower cams youre probably looking at 430 and then porting the stock npi heads with similar flow numbers of those with pi heads, you will probably gain up to 30-40rwhp then. So you will need a lot more fuel for just those mods. So get the fuel now. You'll regret it because you'll be stuck pulling everything back apart to redo it. You'll probably be well over 450 after the porting of the heads because if you were running 400/400 with the NPI heads, you would gain sooooooo much from ported heads. So you might even be up around 470-500 with ported heads and blower cams. So...look more into fuel now.

Mustang_NTriangle

I recommend 9.5 compression if you are going with a centri blower even with 14-15 lbs of boost with, heads, cams and 3" or smaller pulley you will hit your 550 rwhp. f you plan on making more I would drop compression down to 9.0.

Just for comparison, I have stock heads P.I. heads, no headers, 12.5 lbs of boost with a 3.12" pulley, with MMR built block with 9.5 compression, aftercooled and making 450 rwhp on a conservative tune. I still have some ponies on the table. So if you plan on going with heads or a good port you will be over 500 rwhp providing you have enough fuel.

97stanger

well maybe I will be better off going with the 9.5 compression pistons than. The more I think about it, yeah I may be at 475ishrwhp just with the heads/blower cams so maybe I am better off doing my fuel setup now.

I currently run FRPP 42# injectors, Walbro 255lph intank pump...what do you guys suggest I do?

lizzyfan

What's going on Mike!
At 475rwhp your gonna look at probably upgrading your fuel lines and moving to 60lb injectors. As for fuel pumps gonna have to add an inline such as a T-Rex with with your existing 255 in-tank

Sxynerd

how many pump gas guys do you know that run 9.5:1 on a built & blown motor???? It's retarded. There's a reason all pro mod shops suggest lower compression for pump gas DD. (But what do I know?)

lizzyfan

8.9:1 here

Sxynerd

I also have 8.9:1

97stanger

yooo fred! long time no talk man

yeah, im leaning more towards 8.9.1 myself as well.

i guess most of it depends on what heads I end up going with


I'm going to post pics of my progress later on tonight so everyone stay posted!

Black_GT_02

I'm going with twin GT40 fuel pumps, fuel hat and already have 42lb injectors and am aiming for 550ish as well. Just another option to think about. The 42's might not be enought though but big is usually better (and less expensive) considering our modification addictions.