Why Boost Spikes if....
#26
It's finally reliable
iTrader: (18)
If I have a set boost pressure let's say 13psi, by getting a 13psi spring for an external Wategate (tial) would it be better running a vac line straight to the wastegate other than trying to play around with a boost controller? I have a blitz type S digital boost controller and I hate all the complexity.
#30
In my opinion it will. when I was a kid I turbocharged my moms 1 lt Seat. it was making 45ps and using a T25 I got 136ps
Before using a boost control I got 0.5 bar and 0.75 in 1st and 2nd gear. All the spool up felt very lazy
then I got one of the older Greedy units and I could see 1.3- 1.5 bar in all gears
After a while I used the same Greedy on my first proper car , I mitsubishi GTO 3.0lt V6 twin Turbo . with only an Exhaust , filter and boost Control I saw 376ps. The car was originaly doing 0.7bar. The coost was set at a mild 0.8 but because it spooled up so quickly it felt like I had an extra 50ps.
Finally on my RX7 with the new profec B spec 2 if you get it set right it make a huge difference
What I mean with my experience over the years is that with boost controls is that you might get it right at first or strugle a bit but if you get it right IT DOES MAKE MASSIVE DIFFERENCE
Before using a boost control I got 0.5 bar and 0.75 in 1st and 2nd gear. All the spool up felt very lazy
then I got one of the older Greedy units and I could see 1.3- 1.5 bar in all gears
After a while I used the same Greedy on my first proper car , I mitsubishi GTO 3.0lt V6 twin Turbo . with only an Exhaust , filter and boost Control I saw 376ps. The car was originaly doing 0.7bar. The coost was set at a mild 0.8 but because it spooled up so quickly it felt like I had an extra 50ps.
Finally on my RX7 with the new profec B spec 2 if you get it set right it make a huge difference
What I mean with my experience over the years is that with boost controls is that you might get it right at first or strugle a bit but if you get it right IT DOES MAKE MASSIVE DIFFERENCE
#31
rotorhead
iTrader: (3)
Mazda first introduced electronic boost control on series 5 FC engines. They did back-to-back testing to show the improvement in spool and torque:
the arrow points to the hashed line. it shows the inflection point in the boost curve when no EBC is used. At this point the wastegate valve cracks open and boost increases at a slower rate. In contrast a boost controller can keep the valve closed longer.
the arrow points to the hashed line. it shows the inflection point in the boost curve when no EBC is used. At this point the wastegate valve cracks open and boost increases at a slower rate. In contrast a boost controller can keep the valve closed longer.
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Jeff20B
1st Generation Specific (1979-1985)
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09-16-18 07:16 PM