[QUOTE=vanillagorilla]I'm not sure if bigger turbos will fit there though. When I get my truck back I'm going to hold my turbo up in there and see. It's a PT67 so it's of decent size, but twin 67's on a 408 is plenty. I really want to know if 60-1 T3/T4 turbos would fit there.



QUOTE]
yea if you can find out if it will clear and fit nicely let me know

 

I want one

 

I never noticed before but that intercooler looks pretty small for 2 turbos.

Hows it gonna work for the 4wd? Clearance for transfer case and drive shaft??

 

I think this version is more or less designed for the limits of a stockish 5.3L though. So around 500-550rwhp.

 

I'm not trying to bash this kit, actually it has nothing to do with the kit, I think it looks pretty good so far, but I don't think you're going to hit 500rwhp on a stock truck, 100% power increase is hard to get on a truck for some reason.
With other kits, we see about 120-150hp over stock on 5-7psi. Let's say a stock 5.3L puts down 230rwhp, another 100 then it's 330hp (hey i can add, lol), then 150hp, it's 380hp, which is damn good.
You're still 100+hp short with only 3-4psi more.
The LS1's, LS2's can hit this, but not the 5.3L. The most I've seen from a front mount turbo on a stock truck with about 7 psi, with a good tune that is able to be street driven is about 415hp, still quite a bit short from 500rwhp.
You may be able to get this with some dyno tricks, like keeping the intercooler cold, running race gas and lots of timing, but in street form/tune, I anticipate it won't put 500rwhp.
BUT, prove me wrong, I'd love to see a kit out there that will put 500rwhp just from a turbo or two, and fuel upgrades.

Of course, some dyno's read different, so I guess it's possible, but the real test will be the MPH at the dragstrip.

keep us posted,
allen

 

I couldn't agree more. There's a lot of dyno comparing going on around here and most are on completley different types of dynos. I'm not familiar with what dyno's they use down under, but I'm sure nobody has tested the same car on an Aussie dyno and a US dyno. You have a Superflow dyno I believe and that will tend to give lower numbers than most dynos like Rick's Dynapack for instance. As long as everybody is Kosher in correction factors and even SAE rating then that's all we can do.

 

I'm not so sure about that. At 8psi I put down 440rwhp on a stock 5.3L. This was on a rearmount as well with a lot of heat loss I would assume. I think 500rwhp is attainable at 10psi with meth and a good tune. JMHO
However, as you mentioned in your post dyno numbers and not track numbers which tell a better story and more accurate info on the set-up.

 

We may be a little out on our 5.3 numbers, but all I have to go on is the base data this truck laid down, and then use our conversion factory over to Dynojet. With a catback we made 275rwhp on this truck, so maybe 500rwhp might be a little optimistic....lets settle on a nice, safe, 450rwhp then

 

Using the right scavenge pump is the critical aspect here. We dont cut corners and use an aviation rated pump that will last the life of the vehicle. The good news is that you can return the oil into the valve cover with no need to remove the sump and drill it during installation

 

are these going to run the export price of the f-body kit?