turbo map help

Bullet00th

Bullet00th

Member +
Hi Iain, contact Nick @ Tuning Developments, him and his brother was showing me compressor maps the other day, they know what their talking about :)

Matt
 
HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
ahh the disco potato... very good turbo, but ull see a bit of lag with it, on a 5e it would be more suited, but if ur into drag, even on a 4e its a very good turbo.. get the 0.73ar though the 0.86ar is too big for the wee 4e..

kon
 
dantheman

dantheman

Member +
;) go for the .64 hot side, granted its a tad laggy but thats the price you pay if you want shit loads of power :p mines a 2871 aswell :)
 
M

mcleod

Member +
is it possible then mate? to get the same lag as a td04 but more power?
or is it a case of try it and see?
 
Streetech

Streetech

Member +
CFM =
L x rpm x VE x Pr
5660

L = Engine capacity in Litres
rpm = Maximum engine speed
VE= Volumetric efficiency (stock 2 valve = 85%
Stock 4 valve = 90%
Street modified = 93%
Competition = 105% )

Pr = Pressure ratio


Pr =
Bp + Ap
Ap

Ap = 14.7psi Air pressure at sea level
Bp = Boost pressure in PSI


EG.

CFM = 2 x 7200 x 93 x 1.78
5660

= 421.2 ( x by 0.07 for lb/min)
= 29.5 lb/min


Now using the map in the first link the CFM or lb/min (depending on manufacturer) is read across the bottom, then mark your pressure ratio (Pr) up the side. The two will meet on the map showing efficiency of that turbo on your engine.

Quick TD04 one on a made up 4E-FTE
td04calc.gif
 
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M

mcleod

Member +
how do i determine the flow rate tho? sorry if im a tad thick. and the other measurement is boost i plan to run? yes?
 
S

Starbus

Member +
I've just made my own version of these turbo's made much the same as a gt25 but with different wheels and a few little mod's. I'l post graphs when the cars finished.
 
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