I was just reading through the TGO FAQ today when I ran across the question "What fuel pressure setting will give me the best performance?". Here are the dyno results that were posted at different fuel pressure settings:

<font color="red"><pre> 42 PSI (stock) 46 PSI 50 PSI
RPM Torq HP Torq/diff HP/diff Torq/diff HP/diff
------------------------------------------------------------------------
2250 237.7 101.8 254.9/17.2 109.2/ 7.4 275.0/37.3 117.8/16.0
2500 241.7 115.1 262.1/20.4 124.8/ 9.7 283.3/41.6 134.9/19.8
2750 241.5 126.5 275.2/33.7 144.1/17.6 297.0/55.5 155.5/29.0
3000 237.1 135.4 278.2/41.1 158.9/23.5 305.5/68.4 174.5/39.1
3250 233.8 144.7 278.9/45.1 172.6/27.9 311.3/77.5 192.6/47.9
3500 241.0 160.6 278.2/37.2 185.4/24.8 309.5/68.5 206.3/45.7
3750 246.6 176.1 283.4/36.8 202.4/26.8 303.3/56.7 216.6/40.5
4000 250.4 190.7 278.3/27.9 212.0/21.3 298.0/47.6 227.0/36.3
4250 251.6 203.6 272.5/20.9 220.5/16.9 289.1/37.5 233.9/30.3
4500 253.5 217.2 257.3/ 4.2 220.5/ 3.3 277.0/23.5 237.3/20.1
4750 245.0 221.6 242.1/-2.9 219.0/-2.6 266.4/21.4 240.9/19.3
5000 227.6 216.7 225.0/-1.4 214.2/-2.5 237.8/10.2 226.4/ 9.7
</pre></font>


Are these numbers for real? Either I'm reading this wrong, or I'm seeing HP/TQ increases in the 70+ ft/lb / 40+ HP range just for an increase in fuel pressure.

If this is true, then there must be come catch here that I'm not picking up on. I've seen people spend a lot more money, time, and effort (i.e. cam, heads, induction swaps) for lesser increases. If getting that kind of power increase was as "simple" as installing an adjustable fuel pressure regulator, then it just seems like that'd be the first thing that people would get.

Also, if anybody happens to know, what is the induction on that "stock 350 motor" that those numbers are coming from? Seems like it's an L98...

So, if I want easy horsepower, should I be running out to buy a new fuel pump and fuel pressure regulator, or are these numbers, perhaps, at little too "ideal"?

Just curious...
Thanks!

 

those are inflated TPIS #'s

if it were that easy to gain so much wouldn't that be on everyone's first recommendation on thirdgen.org. right......

 

That's exactly the thought I had.

Either the statement that that's a stock 350 motor is untrue, or that's some really misleading data.