twins with TST

[mattymac]

Just got the PDR twins installed over the weekend. Currently running DD3's, TST PMCR and Edge EZ. Edge is on level 4, but I haven't had the TST over 4/4. Pop-off valves are set at 50psi right now. Stock head gasket and studs. I have seen 43 psi but haven't dared give it the full nut yet. Runs great, the power builds really smooth and grows exponentially stronger as the RPM's increase.



Peter

Thats one of the cleanest set ups ive seen. Also that valve cover is BAD A$$! I think with the MLS gasket and studs you should be able to be deep in the 70 psi range. What are your temps with your set up now?

 

[mattymac]

Opps one more thing, Hows the SB con FE holding under all that power?

 

[PGoble]

Thats one of the cleanest set ups ive seen. Also that valve cover is BAD A$$! I think with the MLS gasket and studs you should be able to be deep in the 70 psi range. What are your temps with your set up now?

I have only logged about 50 miles since the install, so the following info is based on very limited history.

EGT Temps act totally different than the DD Jammer I was running prior to the twins. This setup climbs to 900-1000 degrees very quickly, then stays there until you really push it. From 25 psi of boost up to 35 psi of boost, the EGT's can climb as high as 1150-1250 degrees, but at around 30-35 psi of boost, the HT3B is spooled, and as you push the truck harder and the boost rises, the temps start coming down. Last night I was talking with Piers and he told me that the 3B doesn't start doing its job until around 30-35 psi of boost. So I went to a local hill that is probably 7% grade and 1/2 mile long. From a dead stop at the bottom the temps rose to 1000 immediately and stayed there pretty much as I shifted 2nd through 6th gear, then as I stayed in it in 6th, the temps rose to 1250 degrees and the boost was around 35 psi, then as the truck really began to pull hard, and the boost reached 43 psi, the EGT's had gone down to around 1100 degrees. At the top of the hill, the truck was doing 100 mph, the EGT's were 1100, and the boost was around 43 psi. Keep in mind that the numbers are not exact, as I am recalling the numbers as best I can since there was alot going on at the time, and the numbers were changing extremely quickly. Also, we are at about 4,600 feet here in Logan, Utah.



I found it interesting that above 35 psi, the EGT temps actually began to decline. Anyway, I will slowly work my way up to 50 psi, and work the TST box up from 4/4. I am a little gun shy since I blew up two singles with the TST box prior to going to twins. Piers says the twins will handle the TST and up to 70 psi. Currently he is running 60 psi with the stock head gasket and studs. Wonder how far the stock head gasket will go. I think I'll stay about 10 psi below Piers as he works his way up the psi ladder.



As for the SouthBend Con-Fe, it held up extremely well. It didn't slip at all, and wasn't hard to shift after handling the drags up the hill. Like I said earlier though, I have only put about 50 miles on, so we'll see if the clutch holds up, but so far so good.



Peter

 

[lmills]

yeah Peirs seems to think that with the new MLS headgasket and a set of studs these things will hold 70-75 psi ofboost with no problem. He is supposed to be installing some studs on his from what I understand

 

[cliffs03hd]

PGoble, are you running any kind of pusher pump I was looking at the R. A. S. P by KO,

I am running mostly the same set up as you minus the twins. Can't decide which to go with I am like you gun shy about blowing any and spending more than I have to. Beautifal truck and nice install. Cliff

 

[PGoble]

PGoble, are you running any kind of pusher pump I was looking at the R. A. S. P by KO,

I am running mostly the same set up as you minus the twins. Can't decide which to go with I am like you gun shy about blowing any and spending more than I have to. Beautifal truck and nice install. Cliff

Thanks Cliff, I am running a DD Pusher Pump right now, and that has been working well for the last 1. 5 yrs, but I suspect I might have to go to a F. A. S. S. or Air Dog to keep fuel in the truck as I move into the higher levels on the TST.



Peter

 

[Idaho CTD]

PGoble, are you running any kind of pusher pump I was looking at the R. A. S. P by KO,

I am running mostly the same set up as you minus the twins. Can't decide which to go with I am like you gun shy about blowing any and spending more than I have to. Beautifal truck and nice install. Cliff

As far as I know I'm the only one with a RASP on a 3rd gen. The reason is the fan blades need to be shaved about 3/8" to allow clearance for the belt. It was somewhat of a PITA to do this so until it's figured out they haven't been selling them for the 3rd gens. It's a sweet setup though. I run about 15psi at idle and 19. 5 cruising. High rpm's is 24psi. I'm sure it will get figured out sooner or later and the 3rd gen owners can experience this great product.



Nathan

 

[Tomeygun]

As far as I know I'm the only one with a RASP on a 3rd gen. The reason is the fan blades need to be shaved about 3/8" to allow clearance for the belt. It was somewhat of a PITA to do this so until it's figured out they haven't been selling them for the 3rd gens. It's a sweet setup though. I run about 15psi at idle and 19. 5 cruising. High rpm's is 24psi. I'm sure it will get figured out sooner or later and the 3rd gen owners can experience this great product.



Nathan

is there a website for this product?



"R. A. S. P by KO"

 

[Idaho CTD]

You can do a search on the RASP but I believe it is koengineering.com

 

[BCarmicle]

As far as I know I'm the only one with a RASP on a 3rd gen. The reason is the fan blades need to be shaved about 3/8" to allow clearance for the belt. It was somewhat of a PITA to do this so until it's figured out they haven't been selling them for the 3rd gens. It's a sweet setup though. I run about 15psi at idle and 19. 5 cruising. High rpm's is 24psi. I'm sure it will get figured out sooner or later and the 3rd gen owners can experience this great product.



Nathan

Was shaving the blades the only modifications you had to do to get the RASP to work on our trucks? I'm considering a RASP or a FASS, but the stories of failures with the FASS worries me a little. How long did the install of the RASP take including shaving the blades?



Brandon

 

[Idaho CTD]

Brandon,



I would say that it would take the better part of a day to install the system. I had to use a set of snips to trim the blades and then file them smooth and that took about 2 hours. Hanging the pump doesn't take that long but cutting lines to fit, putting the spacer between the pump and filter, and installing all the fittings and return will take probably 4 hours. If you do deceide to go that route I can supply you with more info to speed things somewhat.



Nathan