*(&*&(%^&%$( turbo

[redram04]

well installed a FI s472/83/.91 T4 on a heavily ported pdi T4 manifold with some cpp150's. SO here's the problems,while cruising down the hwy at 80mph i am running around 2200rpm and making about 8psi, rp is 16K but egts are 1100-1200. Smarty tntr, latest update, running sw5 tq1 tm3 rp1. i have changed a bunch of different settings with the smarty and nothing really changes. When i try to climb a hill at 70 or 80 or any speed really the egts will climb to 15-1600 easily and wont cool off. While climbing the hill there isnt any smoke, have a real hard time getting from 10psi to 20psi and egts just skyrocket. On flat ground if i get the charger lit in 3rd gear with the tc locked around 2200rpm then i can build 48psi, rp holds 25K once i am over 2500 rpm or so, but again egts will hit 1600. I have looked everything over, no drive pressure leaks, havent pressure tested the system but i had no leaks prior to the install and only changed one boot with a brand new one.

So any insight as to why it is doing this, i was thinking tc but that shouldnt have any effect once the converter is locked, right? The manifold is wrapped and sometimes it will take over 10 minutes to cool off under 400F. While cruising at 80 i get zero smoke or haze, just high egts and crummy spool. Could low fp to the cp3 cause this. i know i need a bigger cp3 but havent seen a rp issue while watching the gauge, maybe i need more rp down low to help atomize the fuel better.

Well hope to figure this out, lets hear what you have to say.

Truck is current and in my sig.

 

[Samaras Diesel]

Mabey its time for a beter intercooler and a water/meth system to get the temp down. For spool up...............talk to zach at hamilton cams, while its that far apart it wouldnt hurt to port the exshaust side of the head. mabey you coulg tighten the exshaust housing up to a a/r .80? If the 83 wheel will allow for it.

Is it a race cover and billet wheel s472?

 

[full pull]

Have you messed with the timing settings?

 

[6.6lEater]

Seems our trucks have the same affliction. Slightly different mods but still I'm 100* lower at cruse than you. I'm playing with water now and spool flange is due in this week. Water is helping. Dropping 150* at cruse with snow mpg max kit set to start injecting at 2psi (flat ground at 65mph). I will let you know if the spool flange helps.

 

[Headcase98002]

Set your exhaust valves a little tighter. It helped for me.

 

[redram04]

i have tried timing on 2,3,4 not too much difference, will try it again on the same stretch of road to see how it is, dont wanna run too much timing with my injectors though.

will check my valves when i get home saturday.

didnt really wanna go the water/meth route as i dont wanna have to fill up the tank all the time but may just have to give it a go and see if it helps.

going to slap a spool valve on it this weekend too.

it is a standard cover non-billet wheel

 

[Lostnwalmart]

Check for exhaust leaks, a ported head would help a lot along with a cam. The Lower the timing the better the spool. You're converter stall and elevation play a big part too

 

[LReiff]

A heavily ported manifold on a stock head with a stock cam...bad soup.

 

[dieseljunkie]

You have a 12v manifold on a 24v engine?

 

[Scooter's Roofing]

I'd go with a smaller turbo or compounds. I'm not sure what you expected, but what you're reporting doesn't sound odd to me

 

[RonA]

Yep. That's alot of turbo.

 

[BgBlDodge]

I'm with forrest. A smaller exhaust housing and a cam would help immensely.

 

[redram04]

Just figured it would spool a little better. I see guys running big single and no complaints.
The manifold was a 12v that I opened up to match a 24v gasket. The main porting was done where the Turbo mounts to, just smoothed the corners and took out a bit to gasket match it.
Did porting it destroy my gas velocity. The small housing I thought would cool even worse than what I have.

A cam is in order but not till winter along with a ported head.

Would a billet wheel help any or make it worse due to the heavier wheel.

 

[Scooter's Roofing]

a looser converter and locking out OD most of the time so that you can keep 2500rpm on the tach will help a LOT

 

[redram04]

So will I benefit from the spool valve or is that just wasting money.

 

[khaoskustoms]

Flux 4's and an appropriate cp3 will help. Your 150's are a dirty nozzle. (That doesnt mean they have to be smoky) You dont have enough motor to effectively use that turbo.

 

[redram04]

How are they dirty. I was hoping I could get by with that charger until the head and cam get swapped.

 

[khaoskustoms]

High quality injectors/nozzles are worth their weight in gold. Try a set, you will see right away what i mean. Your fueling combo is better suited to a 66mm turbo. If you got the spool valve already, id try it. The more guys who try different combos the better.

 

[Headcase98002]

Also, try a real manifold like steed speed that's already T4 instead of a cluster.

 

[mathews8pt]

You you 100% sure there are NO boost leaks?

These big singles run warm, but not that warm typically. I run 60mph most of the time which puts me around 1550rpm and it runs about 850*egts. I will get up to almost 1200* getting up to speed, but not near what your seeing. My charger has the same hotside as yours, just a little smaller compressor wheel.