Gayard

I have a F1R and just ordered a 3,80 pulley! I hope I get in the 800 rwhp range.

Whats yours numbers??

unit213

I know of a 408 with a F1R in the 800rwhp range.

Slowhawk

iTrader: (12)

Damn,3.80

We got 770rwhp from a 346 with a 4.25" pulley on pump gas. Our race cars have hit 1050rwhp with the F1R and A3 tranny's.

2MuchRiceMakesMeSick

You will not have a problem hitting your goals with that blower/pulley

Gayard

1050 rwhp!? That sounds great! Maybe I can hit 900 rwhp whit that pulley?

My motor specs are:
347 cui forged 8,5-1 CR ( hoping for 20 psi)
ET 240 heads
F1R, 8 rib, 3,8 RR
FMIC 4 inch thick
224 228 58? 114
ECS fuel system
75 injectors
LG headers no cats
M6 gearbox

What do you guys think?

OldBlue

iTrader: (3)

First thing that stands out too me is the camshaft. Seems to be a bit small for the type of power your wanting to make.

Just my opinion though.

Slowhawk

iTrader: (12)

Unless this is a race car I would rather run compression at 10-1 and use a D1 on that Combo.
Also add a Carb intake and smaller cc heads

93formto98T/A

iTrader: (28)

your injectors will likely be maxed out before 900rwhp. The 60s I have are good to ~750rwhp and I'm going to have to go 83 or 96 for the 900.

Gayard

My plan is to upgrade to a LS2 block later, but now I just want to see how much boost my 347cui can take. Thats why I have those big heads and F1R

Im happy as long as I have 800 rwhp or more.

What is a Carb intake?

Quickin

whats the most RWHP that an F2 will produce on say a 408 or 422 engine?

Will it fit and still allow me to keep A/C?


.

kwman

iTrader: (2)

The 1050 rwhp car, I have to ask the dumb question as my knowledge of S/C pulley to boost ratios...sucks. Anyway at what Bar or PSI does this car make 1050 rwhp? If you don't mind me asking...

Slowhawk

iTrader: (12)

Seamed like our F1 car liked 16lbs. We ran 18lbs and it would lift the heads at the track on pump gas.

Slowhawk

iTrader: (12)

It's not really boost.It's engine combination. Compression,Cam/Head selection.

Inspector12

iTrader: (29)

If you are really going to get 20 PSI going to your car then I would say that looks ok. Cam is ok in my opinon, but a different cam could help if you talk to a good cam company to help out with some of the technical sides of picking a cam. Good luck!

TrakDay

iTrader: (7)

I went with the F1C blower... and I plan on running a 3.85" pulley on my 408/ET240cc head setup. I am expecting over 800rwhp for sure, and honestly would be more than upset if it did any less!

SSilverSSurfer

iTrader: (8)

like a GMPP or a victor jr. check out intake elbows.com they pics and stuff like that

LSs1Power

iTrader: (5)

Do you have an F-body? Did the F1R fit the J-bracket? Did you have to do any sort of custom work to fit it there?

Thanks

koji777

iTrader: (3)

F1R here, 800rwhp no prob.... no mod to j bracket

BLASTER

iTrader: (4)

Why just a D1 with such high compression?

ty_ty13

iTrader: (42)

hp and torque comes on quicker....