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R2.....Zap Balls
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Discussion Starter #1 (Edited)

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estimate spool time with displacement and A/R?

some good info to help people choose a turbo for their set-up:
Moudy said:
How to plot points on a compressor map:

Calculate airflow for the X axis: measured in lb/min, airflow = (HP target) x (air/fuel ratio) x (BSFC/60) where BSFC is lbs fuel / (hp x hr) If you don’t have access to BSFC data, you can plug in an estimated value between .50-.60.

Calculate volumetric efficiency = (actual CFM / theoretical CFM) x 100 where theoretical CFM = (RPM x CID) / 3456 and actual CFM = 90%, a good average number if you don’t have access to measuring this. Multiply by .0610237 to convert cubic centimeter displacement into cubic inches.

Calculate manifold absolute pressure: map = [(airflow) x (639.6) x (460 + intake temperature)] / (VE) x (RPM/2) x (CID) Upwards of 100 degrees F is a good estimate for intercooled intake temps if you don’t have access to measuring this. Plan on adding about 1psi to take into account pressure drops related to the intake and/or intercooler.

Calculate pressure ratio for the Y axis = (14.7 + map) / 14.7 If you’re at sea level, 14.7psi will work. As elevation varies, this figure will need to be adjusted.

Note: Don’t worry about the constants like 3456, 60 or 639.6, they’re simply there to tidy things up and convert units.

VE = volumetric efficiency
BSFC = brake specific fuel consumption
HP = projected flywheel horsepower
CFM = cubic feet per minute
CID = cubic inch displacement

Other useful calculations:

Trim = (minor/major)squared x 100

Trim describes the relationship the minor diameter and major diameter of a compressor or turbine wheel shares with each another. The inducer, or minor end when referring to compressor wheels, is where the air enters. Air exits through the exducer portion.
http://www.d-series.org/forums/showthread.php?t=83391
 

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R2.....Zap Balls
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very nice :TU:. I'd rep you, but I have to spread it first :lol:
 

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mitsu turbo specs for cfm @ 15 psi

little more info for yah, all specs are at 15 psi
TDO4-9B-6CM2 265 CFM
TDO5-12A-8CM2 320 CFM
TDO4-13G-5CM2 360 CFM
TEO4-13C-6CM2 360 CFM
TDO4L-13G-6CM2 360 CFM
TDO4L-15C-8.5CM2 390 CFM
TDO5H-14B-6CM2 405 CFM
TDO5H-14G-8CM2 465 CFM
TDO5H-16G-7CM2 505 CFM
TDO5H-16G-10CM2 505 CFM
TDO6-17C-8CM2 550 CFM
TDO6H-20G-14CM2 650 CFM
TDO7S-25G-17CM2 850 CFM
TFO8L-30V-18CM2 1200 CFM
TD04 15G 405 CFM
TD05 big 16G 550 CFM
 

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found during a little research..

Jff24Gordn said:
Turbo---CFM----inducer
HX35----574------56
TP38 767
HX40----763------60
T66-----800-------66
GTP38R 897
B1------900
H2E-----868
HX50----1000-----63,67
HX55----1050------67
HT3B----1085------76
GT42----1302------75
T76-----1350------76
HT60----1400
B2,s400-1500------75
GT47----XXXX------80
HX60----1550
TV81----1600-------85
T88-----1750-------88
HT4B----1800
Big Brother-1900----87
T91------2000------91
HC5A/HX82-2450
T100------2600-----100
T105-----2900------105
Smokem said:
Here are some Holset flow rates for comparison purposes. There is 2.25kg's in 1lb, the designations are kg's per second and lbs per minute.
HX50 0.75kg/s ~ 101lb/m
HX60 0.95kg/s ~ 128lb/m
HX80 1.3kg/s ~ 176lb/m
HX82 1.5kg/s ~ 203lb/m
in case anyone asks, no these are not going to work on a d16. but it gives you a slight hint as to what a hx35 or hx40 might do for you. both of which could possibly be used on a d16. the hx40 being on a highly modified ones of course.

Smokem said:
Here is a brief Schwitzer lineup, the first number is frame size ie: S300, S400, or S500, the second and third numbers are the compressor size ie: S362 would be an S300 with a 62mm compressor wheel. Again, 2.25kg's in 1lb, the designations are kg's per second, and lb's per minute.

S362 0.48kg/s ~ 65lb/m
S364 0.55kg/s ~ 75lb/m
S366 0.59kg/s ~ 80lb/m
S465 0.66kg/s ~ 90lb/m
S471 0.74kg/s ~ 100lb/m
S475 0.81kg/s ~ 110lb/m
S510 1.19kg/s ~ 160lb/m

Look familiar? I was close guessing the S500.
Phat Bastard

S510
http://www.competitiondiesel.com/forums/showthread.php?t=2577&page=3

there is a lot of info listed in that thread. most of the whp numbers can be ignored, since they apply to diesel trucks. but for the sizes and cfm, the info is solid. i know most of the turbos are going to be too big for most peoples application, but who knows. maybe someone will need it for a goal of breaking that 700 whp limit for the d16. ;) :D
 

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hey vtecduck, the links in the first post don't work anymore! lol. Could you update those links please? I'm trying to learn more about turboing my D16, and would like to read up on those before posting noob questions and getting bashed by every one :)
 

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Well.......
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great info im lookin at going the nitrous route one final question just for shits and giggles but would a 75 shot on a stock z6(h/i/e) hold together or would it be better just to stick with a 55shot? plan on puttin bigger injectors nothing outrageous?
 

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Running d15b7 stock, with a mishi t25, any one know where I can get cheap charged piping
and do I need bigger injectors?! Also can someone school me on engine management
i need all the help I can get. I plan to do this my self, help would be most appreciated!
 

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D15b7 w/t25 n00b needs help! Oops if this.is posted twice im new and confused

Running d15b7 stock, with a mishi t25, any one know where I can get cheap charged piping
and do I need bigger injectors?! Also can someone school me on engine management
i need all the help I can get. I plan to do this my self, help would be most appreciated!
 

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Running d15b7 stock, with a mishi t25, any one know where I can get cheap charged piping
and do I need bigger injectors?! Also can someone school me on engine management
i need all the help I can get. I plan to do this my self, help would be most appreciated!
Look at the stickied threads in the forced induction section!
 

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no it is not the same. Think of it as running the car in cooler ambiant air. And since your starting with amb temp and cooling it with sorta dry ice the inlet temp might be 50+ degrees less therefor the same volume taken in has more mass. Then that mass is compressed and temp added will be less then it would have been and contain more moles.

This method actually gets more air into the system. The other way does not. You can always IC on both sides. But you would have to use the Co2 on the outlet side also since there would be less delta otherwise and intercooling would have no effect.

This is impractical for anything but a drag car because you can't carry that much gas. You could use it well at Bonniville where it doesn't matter if you have heavy bottles in the trunk. There where the air is very thin at 4300 ft elv and 100f. reducing the air temp to say 40f coming into the engine will be a big help. I don't know but I think you can get the air down less than that.

Put another way, we were talking correction factors just a few days ago. If you put air intake temp of say 40f into the formula it would correct to a number less than what was on the gauges. Your corrected power would be less than you were getting.


This will work for non FI engines as well. It's like driving below sea level.

As to that drive I assume you are talking about electric drive. This is feasable but has it's problems unless you run with a lot higher voltage. Then you need a real big alternator to get recharge in a reasonable amount of time. I don't know if there are big enough alternators avalable for cars. I guess there are some for police use but I don't know how big they are. You could always put two alt on. I see they do this on those cars with opera house size sound systems.

Even with all that it still takes away one of the wonderfull things about a supercharged car, it always produces more torque even without going to full throttle. It is interesting to watch a manifold gauge while driving a SC car. Just drive normal and see how many times you go just slightly positive.

Climing a grade or towing a trailer will be enhanced by SC but not if it is driven electricly. Who am I talking to? You know this better then I, it's the same as nitrous.
 

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hi guys iam new 2 the forum iam also looking 2 go turbo on my eg6 i have a d15b7 but at the same time i also want 2 do a mimi me with turbo what would u guys recomened? thanx
 
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