grod297

Okay so in answer to where has the torque gone on a built 331.

The bbk intake outperforms the systemax 2 in torque from 2900 RPM until 3200 RPM with the bbk producing 273 ft-lbs at 2900 vs the systemax producing 268 ft-lbs. At 3300 rpm the both produce 295 ft-lbs but that is where the competition ends. from that point on the systemax 2 climbs from 300 ft-lbs at 3400 RPM to a peak torque of 335 ft-lbs at 4400 RPM.

Max horse power from the BBK - RWHP - 293 at 5500 RPM
Max Horse power from Systemax 2 - RWHP 327 at 5800 RPM at 5500 RPM horse power was 324.

Well on the same engine heads ect. a 34 hp improvement just from changing the intake. and 9 ft-lbs improvment in torque.

The real question is will a 347 built similarly produce 400 ft-lbs at any rpm?

Any and all meaningful comments are welcome

G

mjr46

and to answer your question , I believe your lack of power output for the 331 lies in cam choice and heads......what heads and cam and exhaust do you have??? I have a 306 with a well put together combo putting out close to that

w8less

why are your numbers so LOW?? thats a lot of money spent for only 327 rwhp

FivePointOhh

plus juan

grod297

Hell if I know but those are the numbers. Maybe if I click my heels and wish hard enough they will get better. Or maybe I need a better Cam and spring combo.

The car feels better than it did stock and pulls better longer; but I thought the same thing when I got the report. The problem is that I do not want a rough idle cam .. I prefer very smooth and I do not know if you can get that and power with a push rod motor N/A.

At any rate thanks for the observation (you are right it is a lot of money for low numbers

mjr46

you can have a cam that'll perform and give a good idle, prob is OTS cams don't give you the best of both worlds, gotta go custom!! how does .550+ lift and under 220 on the duration for a good but noticable idle sound??? I'll have a sound clip tomorrow of such in my 89 vert thread.......www.flowtechinduction.com or www.camshaftinnovations.com can give you the best of both worlds, I use FTI and have 2 such custom cams in use........couldn't be happier.........what is the entire combo?? h/c/i??

94StinkinLincoln

i can not give an acct for FTI, but i have done business with CI and recomend them.

grod297

Heads afr 185
Cam -- Comp cam 35-518 -8 XR 274 Hyd Rollers
Intake Holley sytemax 2

Thanks

G

ctgreddy

I reccomend a custom from CI. I've got one of their cams with .6/.592 lift and a 114 lsa and she idles nice. not much of a lope at all, just barely more than stock. and my car made better numbers than that when it was untuned. however youre going to see very minimal gains over that if you switch to a 347 bottom end. I think what you need is a better cam.

also is this with an auto? if so that would help explain a lot.

grod297

No this is a manual trans ( sad huh) The more I think about it a built 331 with 9:6:1 compression and forged internals -- A lot of money put in the wrong place I fear. Maybe I will put on a vortech and see what happens -problem is its a stock block and with the compression at 9:6:1 I wonder how musch boost I could run before the engine becomes a boat anchor.