Dieselhed #37 and dfseidel #38

Welcome!

 

so am I #39 or 40

 

renopker is #39

 

I have the whole kit now and have started to install. I still do not know exactly what I have in terms of the top turbo other than it is a hybrid between the gt4088r and the stage 3 gt3788r. The bottom turbo is also a hybrid with the gt45 compressor wheel (81mm inducer x 108mm exducer!!!) stuffed into the gt4202r housing. The bottom retains the gt4202 turbine for faster spool, with a 1.15 a/r housing. The effect is same airflow (this turbo is about 112 lbs per min) as gt45 with faster spool and airflow is at higher velocity.

Both are water cooled ball bearing turbos... I have the bottom in place and hope to have everything done by Tuesday. I am waiting on some studs for the ATS manifold.

 

Also, I guess I am following a trend here and the piping is powder coated hemi orange.

As an aside, it is noteworthy that the wastegate on the secondary is set for 40psi... quite a bit higher than 20-25 that is normally seen in twin sets. We'll see how that works out pretty soon!!!

 

Roll Call for June! (just a tad early)

1.Soulezoo
2.JRussell
3.Cquestad
4.04 Smoker
5.PTGarcia
6.Luvnacumns
7.Snoxracer
8.Dodge 359
9.3500lly
10.gsdog1
11.DWiggs
12.CTD06
13.OT-OF-Here
14.bnold
15.mudslinger
16.dieselram04
17.John_P
18.banshee69
19.jbjarko
20.BlueDragon USMC
21.Whada
22.Dodgezilla04
23. 94ttss
24. rams-n-hogs
25. Sloverado
26. BBA
27. trefling
28. Sapps
29. Morse
30. bluechrome
31. jaredb900rr
32. TXCTDSweetheart
33. desertchecker
34. molalla1ton
35. Moobesor
36. GaveUpOnTV
37. Dieselhed
38. dfseidel
39. renopker

 

Install is done... results are amazing so far. I have some tuning to do and get out of this altitude to do it... but the only time I have seen a faster spooling turbo was the stock he341 (04 turbo) with smarty beta 4.4 on sw7 stacked with Banks six-gun w/speedloader on level 6. But it only spooled to about 30 too...

These are just amazing. Just simply amazing... the bottom turbo spools faster than my old hx35/12 on my old twins. I can roast tires like never before.

 

Because of some contractual issues I cannot provide pics right now and already gave too much information, but these are just too exciting to keep quiet.

 

I am copying some of the posts I have made in the 2nd gen section where ongoing discussion of Ball Bearing turbos has been going on, and I am posting some observations on my twins.

 

The bottom turbo definitely spools twice as fast as the bht3b. No question. In fact, it spools as fast as my old hx35/12 with a lot of fuel thrown at it. 0-15 or 20 psi is just right now. No lag... none. I have not had it over 27 psi yet and guessing about 650-700hp. No dyno yet either. The top turbo is as fast or faster to spool than the old he341 with its 9 cm EH. Very, very nice turbos. The only performance issue I have ran into so far is a tendency to surge with the top turbo.. 2 or 3 gulps.. when at low/no boost condition at higher (over 2100) rpms. No bark at all. I have only gotten them to 60 psi so far, but it is a much, much cooler 60 psi than my old 35/3b set up. This is simply subjective by feeling intercooler surface temps by hand after flogging, but the difference is far too dramatic to dismiss with other theory. Egts in similar power settings in WOT are 200* lower at least; probably more. Cruising egts are 150* lower in most circumstances. With the old set up I could expect 4-5 psi boost in cruise on flat land, now it is 3-4 in identical circumstances. The bottom turbo is always giving me 2psi in that (when 3-4 is showing) and the old 3b would be dead or barely showing .5 psi. All I can say at this point is WOW!!
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First, allow me to set up some of the parameters for reference. Boost gauges: The main boost gauge is a 0-100 Autometer mechanical connected at the intake horn. The Boost gauge for the primary turbo is also autometer 0-30 electronic hooked up on the compressor housing where the boost elbow would be directing air to the wastegate. The TST also reads boost directly from the MAP sensor.

I am running smarty tnt/r sw3 and TST on 2/0 for the purpose of this test.
For reference, at idle in drive with foot on brake at a stop, the TST (reading the MAP sensor, no boost fooler installed) shows 2psi boost. (It actually fluctuates between 1 and 2 psi on the readout, but spends most of the time reading 2).

So going down the freeway at 60mph with rpms about 1700-1750, boost level at cruise fluctuating between 3-4 as shown on TST readout. The primary turbo is reading a steady 2psi at this time.

Not having a stopwatch and the difficulty of using one while driving aside, I am simply using the old scientific standard "one-thousand-one, one-thousand-two" to time. Yes I understand my "one-thousand-one" can be slower than some and faster than others and the actual accuracy of this dubious at best; however, I did the best I could here, please bear with me.
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Anyway... cruising at 60 mph, blah, blah... nail it...

Primary (bottom) turbo goes from 2 psi to 28 psi in one second. Give or take .1 or so. Yes, "One-thousand-one" barely gotten out and primary is at 28psi from 2psi.

Slow down to 60 and do this again watching the main gauge for overall boost. nail it and...

From 3-4psi to 60psi in 2secs. maybe slightly less, say 1.8 sec. -- of course all is dependent on the accuracy of my counting.

I repeated this several times to check for consistency and accuracy. It was about the same everytime, the only real difference was the total boost the Primary was giving... it fluctuated between 27psi to 30 psi... spool times remained consistent.
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It is evident that some tuning is in order. My experience with the old twins was that the secondary spooled faster and then total boost was dependent on the primary "catching up" and supplying the extra air.

It seems to be the opposite here where the Primary is already fully spooled (to its 27-30 psi) then the extra time to get to 60 must be from the secondary... which is wastegated at 40 psi... hmmm... makes me think for sure.
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I hit 80 psi momentarily yesterday and the blow off valves opened up and shot the psi back down to 65 in a hurry... this is with SMarty TNT/R on sw3 and TST on 2/0 early twins.

I guess I do not need to turn up the electrics any more... but nice to know I can and maybe in the future hit that extra fuel with a little giggle juice...

 

Well, la tee dah,