Ok here it is:

Stock 4.8 w/Sanderson shorties, 2.5" y-pipe to 3" cat and pipe through a Dynamax muffler. Built 4L60E and built rear w/3.42 and eaton posi.

97* out and no humidity.

Dynoed on a Dynomax loaded dyno (similar to mustang dyno).

Numbers are:


Tuned by Ryne at CMS in Lake Elsinore.

A/F ratio:



I personally think it's not that bad for the smallest genIII LS motor and 140*+ IAT's (nothing I can do about the IAT's either).

So lets hear what everyone else thinks!

 

Not bad at all. What year is the 4.8?

 

not bad atoll! thats around 315-320bhp
mill the heads, thinner gasket, LPE GT11 cam or 02 z06
and will pump out some more hp

 

Motor is from a '03 Silverado

I will be looking into '03 ZO6/243 heads, cam and springs.

Already freakin bored with the power level and it hasn't been a week!!

 

Haha...Like most everyone else on here and s10forum....building something new and instantly bored with it...

 

The advantage in being bored with these motors you add some boost and the affair continues to grow....MP-70 would put a smile on

 

or could go with regualr 799 heads which are same design as 243, but with reg. valves. and cheeper

 

I'd go with something a little bigger on the cam. Your best bet would be a nice turbo setup, then maybe I could see the LS6 cam.

 

I didnt know that, thanks man!

 

Nah, I want to keep it fairly mild as it's my DD work truck, the big power parts will be used on my C5

I know other cams will pass smog also, but you cant beat LS6 cam and springs!

 

Nice, did you have a build thread on on of the truck forums?

-SS

 

Yeah I posted my build on a couple forums.
S10forum and Performancetrucks section here.

 

243/799 are the same design. same thing as ls2 heads
real ls6 heads have the lite sodium filled valves.

 

i have low miles set of 799 if your looking

 

The 243 heads that came off the Vettes had lightweight valves also...but the ones from the GTOs did not....

 

LS6 heads had those valves not all Vette 243s.

 

Very nice, like said above it would be cool with milled 799's and a ls6 cam!

 

I've always thought about a 4.8 swap in something cause of the rev potential from the short stroke.

 

exactly

 

Nice..