View Full Version : Boost Q
Side Show Turbo
10-12-2002, 12:05
Now that i have my boost gauge fitted im keeping watch on what my cars boosting at which is about a pitiful 7psi. Anyway when flooring it in second it only holds boost until about 6,000 revs. Would it hold it longer maybe to redline if i upgraded my DV to say a Forge or bailey.
Gareth
in a word, no.
its the characteristic of the engine and turbo management, it would be pretty hard to hold that boost at that RPM, pressure laws or something
:cheers:
Side Show Turbo
10-12-2002, 13:10
so whats the point in gettin a bailey/forge dv. I havent noticed any need to change my bosch one!! need reason to buy things like this:
Hurricane= cause it makes and nice noise and slight increase in b.h.p.
Boost gauge= It looks cool as f***
Chip= OBVIOUS!!
DV=???????????
reliability apparently, the DV gets hot (it's not far from the turbo) and the plastic one can degrade - that said, I suppose if it got hot enough, the rubber diaphragm in the Forge could degrade too
The Forge Dv get the boost back much quicker on gear changes and was noticeable on mine even when standard. It closes much quicker and is more repeatable than the Bosch one which can be erratic.
Dormouse
10-12-2002, 18:07
Hmm...the forge isn't that near to the turbo Mr P.
And i didn't think it had a rubber bit in it either.
Having berated Mark (he's the NA expert though, and he does a mean job with susp) i'll go on to say that if (side show turbo) your car is std then you won't get much more than 5-6psi (I get about 11 on the R which I roughy new anyway). I selected my boost guage with a suitable range because of this.
Dor wonders how many people with std cupras have racetech gauges going upto 2.5 BAR(~37 PSI)!!!!
Dor.
P.S Cheers to Saul for his advice on Boost gauge fitting.
OK - I meant the heat from the Turbo & Exhaust - isn't there a rubber diaphagm in the DV? I was sure there was on the one ZBOYD took to bits
Mark
ibizacupra
10-12-2002, 22:02
Originally posted by MarkP
reliability apparently, the DV gets hot (it's not far from the turbo) and the plastic one can degrade - that said, I suppose if it got hot enough, the rubber diaphragm in the Forge could degrade too
No rubber in the Forge DV006 or 7's apart from o-rings.
Piston DV's which are supposed to be faster acting and more reliable.
regards
bill
max_torque
11-12-2002, 08:54
Dor,
I've got a racetech gauge in my beeza - and it goes right off the scale at peak torque!
(mind you needs a new block and pistons every 2000 miles!):D
Ah, motorsport - the fastest way to burn money yet invented by man (as opposed to women who are magnetic to money!)(appologies to any females reading this)
Dormouse
11-12-2002, 13:20
I've got a racetech gauge in my beeza - and it goes right off the scale at peak torque!
GRRRRRR!!!!! :p
I assume that by installing mine off the vacuum brake pipe that my boost measurement is not compromised?
the fastest way to burn money yet invented by man
Or.
A skilled lawyer can steal more money than a 100 bankrobbers.
Dor
Side Show Turbo
11-12-2002, 14:23
Im running my boost gauge from the fuel regulator (under the engine cover) and not from the pipe with the green cap (next to the water bottle). I was told this is better as you get a more accurite measure. Is this right??
max_torque
11-12-2002, 16:02
For the most accurate pressure measurement you want to connect the pipe directly to the plenum, but as there is virtual no flow down the pressure gauge pipe there is virtually no pressure loss so it'll be pretty accurate wherever. I wouldn't recommend it fitted into the fuel pressure regulator line, as this is fairly small bore and the volume of pipe to the gauge may well slightly damp the speed of pressure rise and hence cause fuelling to be slightly lean on throttle tip-ins. I'm talking very small effects here though so it's probably fine, if not acually optimium.