"Hold my beer springs":hehe:I've always run Haisley's 5k's. They even idle good.
Would the Haisleys be worth the upgrade from 4k’s on a 160 pump street truck? Curious if there would be anything to gain. Don’t see the truck ever going much passed 3200rpm with the 160 pump.
I have 60lb springs, hardened keepers and retainers. Putting a 72/87/1.0 on my 95’ soon. Picked up a used fass 260. Hopefully the truck runs a lot harder than it did on 5x16s , 71/76/.9 and a factory lift pump with stiffer spring.
With my old setup I could out run my coworkers bama tuned 5.0 with a couple bolt ons.
Remember it's not gonna make much power over 3500 rpm's no matter what gov springs you run, unless your running over 30° of timing.
Yeah it will free rev up there with no load, but won't make any power up there. With that large 72mm single, your gonna have to turn it up there to work the charger hard.
That's a huge fuel pump for your truck. And I don't remember what 60lbs springs are good for rpm/intake pressure wise. I didn't think it was much past 3000rpm/~40psi.
Tell him to stop being lame and toss a turbo on that 5.0L. Those things are made for it! They'll run 8's for around $8000 into fuel, air, trans, and tires.
I second this. I run a 72/87 .9 T4 on my manifold and its not doing much of anything below 3000rpm. The party really starts 3500+ rpm even with the tighter housing. I couldn't get the 1.0 housing to spool in under 15 seconds even with a very loose converter (400rpm over stock stall). Not much good if you actually want to line up and race somebody.
Along with 30* timing ?