Dynoed Sxe369 Yesterday!
 

Well I finally made an appointment and got my half ton dynoed. Looking for some opinions, I felt the numbers were low compared to my track times of 11.82 at 114 mph.

Engine Mods

215 motor
7mm DVs
5x14s
60lb valve springs
4k gsk
Fass 240
Arp studs
SXE369 T3 gated housing
Pump is set at 26 degrees of timing


We did 5 pulls on it, the first one with the torque converter unlocked made around 470 hp, then 4 pulls locked up in third netted 504, 510, 512, and finally the best numbers were 513 and 790 Ft lbs. Not bad I guess but based on track times it makes more.

Looking for after thoughts on numbers? Thinking more injector, truck was loaded on the dyno making street boost of around 60 psi. Heres the graph for all the 500 horse pulls.
Attachment 63879


tried to embed the video guess I'm not smart enough!
dyno pull

I would want bigger injectors like 5x016 or 5x018 and the .91 t4 housing.

96 3500 5x018 7mm dvs 62fmw

Not on a 5.9, PDD dyno even showed that. The turbo lit late, you can see it in the graph where it made peak torque.

Lol not even considering the peak numbers in Wills test the graph shows something very different and does not support that theory.

The 80/73 turbine works just fine in t3 housings.

On common rails....

This is a stock head 12 valve at 26 degrees of timing. Seeing as how the power was made dam close to 4000 rpm I would lean towards running out of fuel and a bit much timing. My truck has always liked being below 24*. Anything above makes it feel pretty lazy regardless of turbo setup.

What did fuel pressure look like? Where does it begin defueling typically for you? 4ks do not always mean max fuel to 4k rpm.

Fuel pressure never dips below 60psi, its a Fass 240 feeding it through dual feed lines, also didn't mention no plate, AFC modded for full travel. Truck doesn't feel lazy at all. It comes on pretty hard driving.

I like the controversy here, I'm not opposed going to t4, I really need to make at least 600 hp on this charger. Don't really have much room for twins since I put AC on the truck the other week.

You need to spend some time tuning the pump. I know this is harped on with ppump stuff but it is honestly the key to everything. You have all the parts to make 600hp, find it in the pump. No plate and a possibly loose afc would hurt your dyno numbers. A T4 housing is not the answer imo.

Afc isn't very loose at all, it goes max travel right before peak boost. Maybe I should just spend the money and get AFC live. I'm pretty close to ditching the 12 valve in favor of a 6.7CR I have sitting in my shop.

T3 is fine. why not pull in Overdrive? More load= more HP

edit: just saw you were seeing full boost. hmm

What was the max rpm they were pulling to 2800, t3 is def better at that rpm range.

Going by the videos that were posted, for a street truck, the 62, or the 64mm turbos with a 68mm turbine wheel, in a .70 housing, was the ticket in every case.
The 69mm was a laggy dog....5 seconds to spool is rediculous.
One thing that would have been great to see was the drive pressure on every dyno run.

pulling to 4000

Turbo is not laggy whatsoever in the street i think flooring it at 1500 drowned the spool up from all the fuel. This is the best single turbo Ive had as far as driveability
Was seeing full boost. wasnt at first loaded it more gained 7-8 psi and only made 3 more horse

Don't have a gauge on it. I'd hate to upgrade to a t4 manifold and lose spool up. Probably going to swap in some 5x18s and back the timing down to 22 degrees and play with the pump.

I meant that the pdd tests were pulling to 2800rpm only, in that case t3 will be a better choice. Making power to 4000 I'd bet a t4 with a t4 manifold and not an adapter would make a big difference on yours.