underpsi68

I am in the process of rebuilding my turboed SBF and would like to change cams. Would someone mind plugging my engine info into a engine simulator program to help pick out a cam? I feel my current custom cam is on the small side and would like a little more rpm.

Thanks for any help

getrdunn

iTrader: (7)

Mild Thunder and others will likely see this and help you out. Their always good about that. Personally I'd post your build to help expedite. SBF.... I had tricked out 351 built for my 69 Mach 1 but was one of those deals where I purchased it during the build and finished by Valako. It's gonna be a good runner. Just need to change the pig out from 513 to 410's. Use to have a 302 boss that pulled up to 8k. Those days are done after sticking a rod through the block. 351 is cammed to pull a little more moderate 6,300.

underpsi68

357ci. 3.4 stroke, 4.09 bore, 5.4 rod, 9:1, single plane carb intake converted to port injection. 205cc intake port /72cc exhaust port on a Twisted Wedge canted valve head. Flow numbers below:kids
Intake. Exhaust
.100- 71- 62-
.200- 137- 115-
.300- 203- 155-
.400- 255- 190-
.500- 290- 228-
.600- 305- 242-

Currently running a solid roller 238/238 .560/.560 114 separation.

Engine made peak power at 6300rpm at 15psi on chasis dyno 787rwhp thru and automatic which is about 900fwhp. This is on E85. On dyno that is hp my fuel system ran out.

Since last dyno 8 years ago I have upgraded fuel system, put larger port matched intake, changed cold size piping from 2 1/2" to 3" along with a much larger more efficient intercooler. Not sure where hp is now.

I would like the engine to make peak power 500ish rpms higher while still being steetable. The car is an automatic with a 4000-4500 stall.

Also installing new more efficient turbo with better flowing exhaust system. Would like to run 20psi and make 900-1000rwhp.
Thanks

underpsi68

I did find 2 cams that I think might work if I change the lobe seperation from 110 to 114-115.

First is adv dur 274/280 @.050 236/242 .602/.608 minus lash .016/.018
second is adv dur 280/286 @.050 242/248 .608/.614 minus lash .016/.018

underpsi68

Back in the day i had 4.88s in my Demon. Wasn't to good on the parkway lol. I was in the right lane at 4000rpms.

Nice thing about turbos is the torque they make. Right now I am running 3.25s and was thinking of switching to a 3.10. And I have over drive on top of that which is .67 ratio. Makes for a nice cruiser that takes many by surprise.

14 apache

iTrader: (1)

That's almost what I ran in my boat engine 248/248 .585 114lc forgot what it peeked at cam was chosen by gale banks. Was in a 406 chevy with 11xsp Brodix heads.

MILD THUNDER

iTrader: (3)

I'll bet with the 5 extra psi, larger intercooler, new turbo, and better exhaust, you'll hit your goal without changing the camshaft.

vintage chromoly

iTrader: (3)

I used cam motion for a custom cam for my 347 SBF.
car is faster than it should be for what it is. (11.69@113)

my cam is 230 236 @.050 with .680 lift 110LSA. Hydraulic roller.

GT 40 heads I ported myself in the garage and they flowed 230CFM at .600

car has been together for years with zero problems. Haven't even pulled a valve cover.

SB

iTrader: (1)

Shhhhhh,

getrdunn

iTrader: (7)

thats awesome. Surprised the lifters don't hydroplane off the lobes. Lol... Amazing you haven't had any issues but I can see here it would make good power.