boost increase

[wide 5]

First post!

Hi can someone tell me if doing the cup mod will increase my boost pressure.
Because after doing it at the weekend its gone from 12 to 20 on a t2 turbo:confused:

[SCHWARTZ]

it can do depends how youve done it. if you had the actuator origionaly piped to carb top and now its at carb base that will affect the boost as there is less pressure at carb base there fore takes more pressure to open accuator. where are you teeing off of to get boost readings?

[wide 5]

New poster! (less than 10 posts)

I took the original pipe that went to the dash and poped it on my new one. So were ever that comes from the manifold i think.

[Andrew Cooke]

sounds like a lot, you've probably done it wrong, or it was wrong before

[SCHWARTZ]

you wana t off of the pipe that funs from the carb to the aei unit then it will give you a more accurate reading and also show vacuum.

[wide 5]

New poster! (less than 10 posts)

ok i will try that at the weekend car still runs fine but was just worried about the increase of boost

[SCHWARTZ]

boost increase is all ways a good thing!:D:laugh:

[Andrew Cooke]

take some pics of your pipes

[wide 5]

New poster! (less than 10 posts)

ok will do
what i did was stuck a bolt in the back of the turbo, 2 bolts in the actuator and looped the carb top if that makes any sence?

[SCHWARTZ]

so nothing is hooked up to your actuator?:eek:

[wide 5]

New poster! (less than 10 posts)

nope

[SCHWARTZ]

you need something to operate the actuator thats why the increase is so high. have a read of this
http://www.rtoc.org/boards/showthread.php?t=4756

[wide 5]

New poster! (less than 10 posts)

will sort it out thanks for the help. It run well at the week end like it was though:)

[HULK]

Unless you have changed the jets in the carb you won't run 20 psi for long before the turbo and engine drops it's guts when you hit go go pedal

[Markey Mark (BD)]

New poster! (less than 10 posts)

ok will do
what i did was stuck a bolt in the back of the turbo, 2 bolts in the actuator and looped the carb top if that makes any sence?

Thats whats wrong, having nothing to actuator then blocking both off both ports will make the actuator almost solid. Not good mate.

You need at least one vacum pipe going to the actuator from either carb base, carb top or compressor housing.

As Hulk says, don't be running it at 20psi if the carb hasn't been correctly set up for it, also the standard T2 won't be liking 20psi best dropping it down abit once you get the pipework sorted out.

[Andrew Cooke]

:tuttut:
New poster! (less than 10 posts)

ok will do
what i did was stuck a bolt in the back of the turbo, 2 bolts in the actuator and looped the carb top if that makes any sence?

http://www.rtoc.org/boards/showthread.php?t=4756

[wide 5]

New poster! (less than 10 posts)

ok i will sort it before i drive it next

[wide 5]

New poster! (less than 10 posts)

thanks for the help could of cost me a few quid probably done about 250 miles like this would i have caused some damage:confused:

[SCHWARTZ]

depends if you held it on full boost for periods at a time standard t2 wont like 20psi and if the carb aint jetted correctly could cause detonation. See how it drives when sorted.

[old skool turbo power]

First post!

Hi can someone tell me if doing the cup mod will increase my boost pressure.
Because after doing it at the weekend its gone from 12 to 20 on a t2 turbo:confused:


call me a old man if u want (im only 25):laugh: but as i say with these cars if it ant broke dont fix it.standard boost pressure on the 5 is pretty good imo.if looked after will hold up pretty strong and shif pretty well i find even against new ish cars.
ok some ppl will say std boost is pretty crap fair enough,but at the end of the day i have had no probs with the engine and has been perfect to me in the last 3half yrs i have had it :)but hey just my opinion.hope you get ur prob sorted :agree:

[GTphil]

STD boost!?!:eek: Are you mad? :wasntme: A bar of boost seems to be pretty reliable, my cj1 did over 30k of hard miles running said boost whilst being driven pretty hard;)

Obviously it's much better to make sure it's fueling correctly no matter what boost you are running.