05-22-2008, 10:55 AM
|
 |
Registered User
|
|
Join Date: Mar 2007
Location: DELAWARE
Posts: 1,041
|
|
Quote:
Originally Posted by Dee8go
Okay, that's what I was afraid of. Each thing you tweak over here requires further tweaking over there. Which gives you more boost, a supercharger or a turbocharger? I know the supercharger's boost is instantaneous whereas the turbo's has a lag, but haven't heard anything much about the comparative gains from each.
|
Turbo only has a lag if it's too large for the engine displacement.
Lag comes from the exhaust pressure needed to spool the compressor up.
Larger the compressor the longer the lag and higher the rpm the boost comes in at.
I run twin Garrett T2"s which come in without being noticeable at 1500 rpm....zero lag and at .48 bar boost around 2500 rpm.
A larger single turbo may just be coming in at 2500 rpm.
Larger turbo may show more HP and boost, but I'm gone by the time their boost begins to make power !
CIS-E isn't the easiest injection to enrich under boost.
Two additional injectors with a stand alone control will give the ability to do a 3D map while leaving the stock semi electronics untouched.
High boost, claimed high horsepower, does not always equate to street performance.
I dyno'd on a Mustang load unit at 195 HP on a stock 62K M103-12V with a Turbotechnics twin turbo kit installed.
Ran a 14.39 @ 99.5 mph with poor traction...
Figure it out using a 3900lb car ( car + driver + fuel )....
With drag radials I'm 13.5 and 103-105 mph....
0-60 mph around 5.1 seconds
Dyno numbers are just for establishing a base line and tuning !
Ed A.
|