5sfe head work?, built for boost. Options

[Kerr1]

alrite im planning on a full build for high boost....3sgte rods....custom pistons(9-1)...and high performance bearings and rings....this is what i have for the bottom end. how much boost can i run on a stock head? what are some mods i could do 4 high boost? if i leave the head alone and just replace valves and valve springs w/ titanium would that be good enough or do i need bigger valves and port and polished head? which cams would b better for a turbo setup? Im thinkin 101..ne1 elses opinion greatly appreciated.

[Muggs]

The weak point in the 5s head is the cams, they just plain suck. There are several companies that offer regrinds, such as webcams and others.
I am working on a similar project and when I ported my head, I found A LOT of casting flaws that needed to be corrected.
So, I would recommend cams, porting, and upgraded valve springs for starters.

edit: the webcams 194 grind seems ideal for the 5s, and they now have more aggressive grinds available , too.

This post has been edited by Muggs: May 18, 2008 - 1:42 AM

[bccentaur3]

If you are building the bottom end you might as well finish it off and build the head. To be honest I don't know how much boost the head can handle. But with the built bottom end you'll be good, but I recommend for you to at least port out the head. How head flows like dookie. And of course regrind cams. To be honest you can probably get away with a built bottom end with regrind cams for the head and a valve job done. You can probably hit maybe 300 horses, but will it be reliable? I don't know.

[Kerr1]

thanx....so really i dnt need the valve springs or valves? just cams? dsnt the 5s make more torque than hp?

[bccentaur3]

well whats the condition of the head?

[Muggs]

Larger valves will certainly help, but you will notice the biggest difference from cams.
Upgraded valve springs will allow you to rev a bit higher to take advantage of the cams and turbo.
What turbo do you plan on using?

[Kerr1]

The head is almost brand new....well rebuilt w/ less than 1k miles on it.

[Kerr1]

i have a garrett t3bb turbo....what will i b able to rev 2 if i get the valve springs and valves?

[bccentaur3]

You need to just get the regrind cams if you want a higher red line. Valves and valve springs will just help, not add rpms.

[Kerr1]

You need to just get the regrind cams if you want a higher red line. Valves and valve springs will just help, not add rpms.

gotcha...ok if i get the 294 from webcams and im planning on boosting abt. 19 psi...what are the #'s i should be expecting? Oh and do ne of you know where i can get a 3bar map sensor?thanx

[bccentaur3]

I hope you aren't planning on using the ct-26 turbo. I'd upgrade the turbo if you are planning on achieving high numbers.

[Kerr1]

i told you i have a garrett t3bb turbo...

This post has been edited by Kerr1: May 20, 2008 - 1:48 AM

[RichieRichJP]

You need to just get the regrind cams if you want a higher red line. Valves and valve springs will just help, not add rpms.

I think I'll believe Ferrea when they say it adds up to 800rpm's

[bccentaur3]

With a T3 you can make som really good numbers. Since your bottm end is built you can take a lot. With an addition of porting and polishing the head with cams. You can call it a day.