zippy

One of my friends runs off road and until this last truck has 36" tires and bigger on everything. This truck is one of them and shifted at around 6400 and his current with 34" tires shifts at around 6600. All of my off road vehicles have also had power from idle to well past 6k. There are basicly three types of off roading (for fun anyway), mud, sand, and rock crawling. In the mud you need tire speed hence all the rpm you can get. In the sand getting stuck isn't really a problem with the right tire size and pressure so you run as fast as you feel safe going and let the gearing take care of the power and rpm. I'm guessing looking at your truck that rock crawling isn't much of an issue. There are just trail riders, but those don't need much more than an improved stock truck with a little more tire and lockers.

InchUp

iTrader: (2)

Hey if it pulls above 5500 then awesome! My emphasis on low end grunt is just making sure the torque comes on early and my peak torque is as low as possible. My gauges only go up to 6000 because they're meant for the 4.3L. I have contemplated switching over to the 2.2L gauges meant for S-trucks that are a direct swap, only difference is a 7000 rpm tach, same everything else. So that may be an option, just not right now.

One thing I've been concerned about. The ONLY S10/Sonoma Gen III headers available for the swap are 1-1/2" shorty headers from Sanderson (spelling). Most guys on here I've been reading like the 1-5/8" for the daily driving and 1-3/4" for most 6.0L's or anything performance oriented. I'd love to have a set of 1-5/8 or 1-3/4 primary equal length long tubes made up with appropriate sized collectors and magnaflow cats welded right to the collectors but $1000 or so after coating is out of the question right now. How badly will these Sanderson (sp) headers choke the motor do you think, or should I just use the stock manifolds off the LQ4 (which might not fit anyway but the body lift helps)?


Edit: By the way, the truck is built for the rocks, trails and snow.

zippy

You do have an interesting build with the truck there though, I do give you credit for that. It's alot lighter weight than a normal solid axle truck with having the S10 body. As for the headers, I'm not sure you'll gain alot with headers that small over a set of stock manifolds. With so many cam choices that would work, I'd honestly look around for a good deal on an LS6 cam or GT2-3 cam with LS6 springs. Try to keep the duration below 220 to keep your off idle power right there when you need it (with stock torque converter).

TARZAN

iTrader: (12)

Have you thought about a LS6 cam?


-Will

InchUp

iTrader: (2)

Yes and I don't like it really. They're all up in the 116-117 LSA range, where I'm trying to go for fuel efficiency and a broader area under the usable torque curve (112-114 at most). I'd look for the GMPP Hot cam first before anything LSx.

zippy

I would agree with you for sure on going to the 112 LSA area. The LS6 cam is just nice because you can often get them very cheap if you buy them used. If you're out wheeling in some hot weather though you might find a bit of a choppy idle with the 112, but if I were in your shoes I'd be doing the same. I'd probably shoot for a custom grind with specs about like a Comp Cams: G3 XFI 261 HR15 with a 112º LSA.

That cam is a:

208/212@.050"
.554/.558
115LSA

Power with a 6.0L should be good from idle to about 6,000 or so. It have alot of usable torque in low rpm I'd bet.

InchUp

iTrader: (2)

In a 355 small block I built a few years ago I used Rhodes V-max lifters which allowed me to use an Edelbrock RPM cam with very daily driver friendly manners, much like the Performer. It's RPM range was supposed to be from 1500-6500 or so in the 355 and the Rhodes lifters bled down some of the vacuum much like variable valve timing, where that cam then became an 800-6500 cam.

Is there a product like that available for the Gen III's? I'd be able to use the custom grind cam that CompCAMS spec'd out for me, while not giving up any low range.

03sierraslt

iTrader: (22)

I think that would be a great cam for what he wants. Great lowend and its still going to pull better up top then stock.

DezertRacer

We are about ready to put a new cam in this truck. Any suggestions?



LQ4, Custom 4” air intake w/ 2 Donaldson Filters, Pacesetter headers, 4L80E manual valve body, stock 13" TC, 9" axle w/ 5.29, 37" tires.

Need a lot of low end grunt for Nevada silt beds/soft sand washes and to come out of deep burms.

99Silverado5.3

iTrader: (7)

I would get a custom cam with a low lsa 110 or 108 brings the powerband down in the rpm range. Call Richard at wcch.