off the wall experiment

jmd025 said:
This is how i've tuned my set, and i'm happy with the results.....whether that be right or wrong based on the internet approved "common knowledge" of twin tuning.

With my turbos (mismatched junk) i need to work the primary harder for best results
Click to expand...

That's what I'm talking about. Every infor out there states to have them share the load. As in both the primary and secondary are creating equal amounts of pressure. But then some spin the primary like crazy and let it do 3/4 the work? I tried talking to a few people, but this is what they tell me "Don't doubt the Ht3B".
 
The trick is making it easy to adjust, then go to the track and see what nets you the best mph, or dyno in the same session, for the most hp..
 
Sure recompressing the air charge is nice, but I wouldn't sacrifice less mass flow from primary for more recompression from secondary.
 
24vriviera said:
The trick is making it easy to adjust, then go to the track and see what nets you the best mph, or dyno in the same session, for the most hp..
Click to expand...

What he said, going for equal load is a great idea but doesn't seem to net the best gains for max effort. Jmd if your set is mismatched then what the hell is my set LOL
 
Yours will never work. The ratio has to be exactly that of a 66/80. So with yours you need to resize to a 72-73mm primary. Otherwise keep the primary and upsize the secondary.
 
Lostnwalmart said:
What he said, going for equal load is a great idea but doesn't seem to net the best gains for max effort. Jmd if your set is mismatched then what the hell is my set LOL
Click to expand...

I dunno Cliff, but my pocket book is dictating i run what i brung, so i have tried all of the tuning spectrum and settled on what everyone said was the wrong way, as the best running setup.

You and i can trade sets at anytime you'd like:Cheer:
 
Ok pulled the e gate off and am using the lightest spring plus regulated boost to fight drive pressure. Hopeing that will keep it close to 1/1. I did have to clean the gate up pretty good it was almost siezed from soot/ nastyness. It moves much much much better.
 
I've noticed in my testing/tuning with the He351cw compound setup that adjusting the wastegate has both direct and indirect results.

1. It bypasses exhaust which lowers drive pressure hitting the He's turbine wheel=He351 loses some available shaft horsepower so compressor rpm goes down.
2. The bypassed exhaust retains higher average temperature meaning there is more energy available to drive the big atmosphere turbo=interstage boost goes up.
3. The He's resulting drop in shaft horsepower slows it down to where it cannot consume as much air flow.
4. Because the He351 cannot consume as much air due to lowered shaft horsepower, it raises the inter-stage boost pressure because there is more "back-up" on the intake system.
5. The higher interstage boost equates to a more mass dense air charge.
6. The more mass dense air charge requires more shaft horsepower from the He351 to perform that same amount of compression ratio.


Bascially, it takes quite a bit of fine tuning to get it all working perfectly!
 
I'll be watching this. I'm interested if drive pressure can be kept in check, I'm starting to wonder if the 58mm turbine on the 351 is too small for larger primaries cause it takes so much drive pressure to drive the 351 hard enough to effectively compound the air from the primary. I'm just thinking out loud here.
 
12vCumminsFTW said:
I'll be watching this. I'm interested if drive pressure can be kept in check, I'm starting to wonder if the 58mm turbine on the 351 is too small for larger primaries cause it takes so much drive pressure to drive the 351 hard enough to effectively compound the air from the primary. I'm just thinking out loud here.
Click to expand...

60mm...


You'd be surprised, it works well.
 
Borg Warner

S200
Turbine Wheel
61.5/69.5
64/74
Comp Wheel
56/80-----58lbs/min
59/80-----61lbs/min
Housings
T3 .55, .70, .76, .85

S300
Turbine Wheel
65/xx, 68/76, 71/80, 73/80
Comp Wheel
57/83--------61lbs/min
60/84.5
62/88--------72lbs/min
63/87
64/92.5
66/91.5------76lbs/min
71/105.5-----86lbs/min
Housings
T3 .55, .70, .85
T4 .83, .88, .91, 1.00, 1.10, 1.25

K31
Turbine Wheel
74/83
Comp Wheel
71/100-------95lbs/min
Housings
T3 .76
T4 .85, 1.0, 1.10

S400
Turbine Wheel
74/83, 77/87, 80/87, 82/87, 82/92, 88/96
Comp Wheel
66/100
71/100-----89lbs/min
75/100-----100lbs/min
76/107-----104lbs/min
78/110
80/116-----120lbs/min
83/119
88/xx
91/xx
Housings
T4 1.0
T6 .90, 1.10, 1.32, 1.51

S500
Turbine Wheel
99/110
Comp Wheel
80/xxx
86/xxx
88/120-------145lbs/min
91/120-------155lbs/min
95/131.5-----160lbs/min
98/xxx
Housings
T6 .85, 1.00, 1.15, 1.45, 1.60

Holset

HX30
Turbine Wheel
52/65.5
Comp Wheel
44/73--------45lbs/min
Housings
T3 6cm

HY35
Turbine Wheel
58/65
Comp Wheel
54/78
Housings
T3 9cm

HX35
Turbine Wheel
58/70
Comp Wheel
54/78
54/83
56/83-----52lbs/min
60/86-----62lbs/min
62/86
Housings
T3 12cm, 14cm, 16cm

HX40
Turbine Wheel
64/76
Comp Wheel
58/83
60/83
60/86-----62lbs/min
62/86
Housings
T3 16cm, 18cm
T4 16cm, 17cm, 18cm, 19cm, 21cm

HE341
Turbine Wheel
58/65
Comp Wheel
54/xx
Housings
T3 9cm

HE351
Turbine Wheel
58/65
Comp Wheel
60/86-----65lbs/min
Housings
T3 9cm

HX50
Turbine Wheel

Comp Wheel
62/99
66/99
67.5/99
Housings

HX52
Turbine Wheel
70/84
Comp Wheel
64/99
66/99
67.5/99
71/99
Housings
T4I 16cm, 25cm

HX55
Turbine Wheel
73/xx
77/86
80/86
Comp Wheel
66/98
67/99
65/100
72/xxx
Housings
T6 19cm, 22cm, 25cm

HT3B
Turbine Wheel
86/97
Comp Wheel
73.5/109
Housings
T6 23cm, 26cm, 32cm

HX60
Turbine Wheel
86/97
90/97
Comp Wheel
76/102
80/112
Housings
T6 23cm

HT4B
Turbine Wheel
88/118
Comp Wheel
83/127
88/139
Housings
T6 26cm

HC5A
Turbine Wheel

Comp Wheel
87.5/127
88/139
Housings
T6 41cm

HX82
Turbine Wheel
94/126
Comp Wheel
82/140
Housings
T6 22cm, 25cm, 32cm, 36cm, 41cm, 48cm

Garrett

GT35
Turbine Wheel
62/68
Comp Wheel
61.5/82-----67lbs/min
62.5/82.5---75lbs/min(GTX)
Housings
T3 .63, .82, 1.06
T4 .63, .82, 1.06

GT37
Turbine Wheel
64/72.5
Comp Wheel
55/76-------50lbs/min
59/82-------56lbs/min
61.5/82-----67lbs/min
63.5/88-----68lbs/min
65/88------ 71lbs/min
68/94-------80lbs/min
Housings
T3 .89, .99, 1.11
T4 1.12

GT40
Turbine Wheel
68/77
Comp Wheel
63.5/88-----68lbs/min
65/88-------71lbs/min
68/94-------80lbs/min
Housings
T4 .85, .95, 1.06, 1.19, 1.34

GT42
Turbine Wheel
75/82
Comp Wheel
70/94------84lbs/min
70.5/94----98lbs/min(GTX)
75/102-----96lbs/min
76/102-----114lbs/min(GTX)
Housings
T4 1.01, 1.15, 1.28, 1.44
T6 1.01, 1.15, 1.28

TV4502
Turbine Wheel
78.5/85.5
Comp Wheel
65.5/91
Housings
T6 1.22

GT45
Turbine Wheel
80/87
Comp Wheel
80/108------112lbs/min
80/108------127lbs/min(GTX)
Housings
T4 1.01, 1.15, 1.28, 1.44

GT47
Turbine Wheel
84/93
Comp Wheel
80/108------112lbs/min
88/118------140lbs/min
Housings
T6 .96, 1.08, 1.23, 1.39

GT50
Turbine Wheel
91/99
Comp Wheel
81.5/118
Housings

TV8401
Turbine Wheel
97/108
Comp Wheel
84/117
Housings
T6 1.23

GT55
Turbine Wheel
102/111.5
Comp Wheel
84/123
88/118-----165lbs/min(GTX)
89/118.5---145lbs/min
91/133-----153lbs/min
91/133-----167lbs/min(GTX)
94/133-----160lbs/min
94/133-----181lbs/min(GTX)
106/141----185lbs/min
Housings
T6 1.0, 1.18, 1.24

GT60
Turbine Wheel
118/129.5
Comp Wheel
106/141-----185lbs/min
Housings
T6 1.25

G-Trim
Turbine Wheel
111/130
Comp Wheel

Housings

F-Trim
Turbine Wheel
106/130
Comp Wheel

Housings[/QUOTE]
 
Well I got a billet seven blade 70.5/104 comp wheel for my GT42. Anyone ever seen a map for it?
 
I meant to say a 71/102 wheel is what it measures so a gt4294 map wouldn't really be the same since the exducer is larger, and it's a seven blade vs a six. Yes, currently FI has the backplate to get it cut. This wheel is also a bit taller, or protrudes into the comp housing further. I don't think I will need to bore the comp housing but we will see once I get it back.
 
Lostnwalmart said:
Ok pulled the e gate off and am using the lightest spring plus regulated boost to fight drive pressure. Hopeing that will keep it close to 1/1. I did have to clean the gate up pretty good it was almost siezed from soot/ nastyness. It moves much much much better.
Click to expand...

And Then......?????
 
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