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More boost please (or a least help me find where its gone)
General Car Related Discussion.To discuss anything that is related to cars and automotive technology that doesnt naturally fit into another forum catagory.
More boost please (or a least help me find where its gone)
or at least help me find the 8 psi I am missing
I fitted a recon(from cr turbos) turbo a few months back and ever since then the car has been down of boost had a good look round I dont have any air leaks so
could it be the new -31 actuator (from msd) (although it had a -34 before) I fitted at the same time or should I be looking else where
help me as I have a rolling road day in a ew weeks and I dont want to lose out the that old xr4i cossy rep
I am using a greedy boost controler not sure what one tho
Last edited by Matt Baxter; 06-06-2010 at 08:54 AM.
Did you preload the actuator before you fitted it?
Martin
yeah its just over half a hole
Originally Posted by KSA-Cossie
You have pm matt,will be tight between you and steve if the figure are anything to go by lol.
Cheers for the pm Kev, gives me something to think about wont be happy if its the actuator but saying that its an easy fix would I be better off getting a forge one?
I know it wont make anyway near 400 atm with only 24psi a tired engine would be lucky to see 300
Originally Posted by cossie4i
Im going first when its cooler
Bald one can go about 15th so the dyno cell is nice and hot
Steve
Its the only way you MIGHT beat me
Originally Posted by Captain500rs
Are you still using an amal valve?, mine was losing boost by about 5psi and it was the wiring for the amal valve.
its got a boost controler not sure if its still up to the job pretty sure its a greedy profec b
put some more preload on the actuator or turn the gain up on the boost controller.
already tried more preload and if anything it deopped a little and the boost controler is already at the max setting
Originally Posted by Jay_
recheck for any leaks then fit a -34
Deffo dont have any leaks Jay as I made up a capped bit of pipe with a tyre valve in it and put it up to 15psi and it was holding that fine without any leaks.
So you reckon a -34 might be the answer?
if so what make should I go for as there are some fake Garrett ones about so i'm told
are the forge ones any good?
The -34 would have held more boost than a -31 so if nothing else has changed since fitting the -31 then surely there's bound to be a boost drop? I'm surprised you say the G-reddy is on its max setting, my Apexi AVC-rwill run mega amounts of boost. Not sure if its the same kind of setup but on the Apexi you dial in the boost level you require and drop the duty cycle to start with, then up the duty cycle until you reach desired boost level. Try adding more preload to the -31 before you replace it though.
The -34 would have held more boost than a -31 so if nothing else has changed since fitting the -31 then surely there's bound to be a boost drop? I'm surprised you say the G-reddy is on its max setting, my Apexi AVC-rwill run mega amounts of boost. Not sure if its the same kind of setup but on the Apexi you dial in the boost level you require and drop the duty cycle to start with, then up the duty cycle until you reach desired boost level. Try adding more preload to the -31 before you replace it though.
THe greedy one is very basic tbh and had to be modded to make it hold 32psi by Talk of the devil
already tried adding more preload and if anything it dropped a little
anyway as i said above I had ordered a Forge 24-38psi one from Burton's so fingers crossed that will sort it out
Is your wastgate penny shutting correctly, the arm is not bent is it ????
Steve
I assume its all fine as it was new last year when the turbo was reconed, Ł700 in total told them I will be working the turbo quite hard so they pretty much replaced the whole thing
The -31 with same preload will lift approx 6 psi lower than a -34 so all you actually needed to do was increase preload by about 3mm to give an approx initial lift pressure the same as your -34.
The -31 with same preload will lift approx 6 psi lower than a -34 so all you actually needed to do was increase preload by about 3mm to give an approx initial lift pressure the same as your -34.
Cheers for that Stu although its a little late now as I fitted the new actuator and stilll only getting 26psi this morning, was only 24psi over the weekend but the weather was hotter then
So what next then???
Last edited by Matt Baxter; 10-06-2010 at 04:41 PM.
ive known 2 people recently one with a brand new t34 and one with t38 both have had bent or not seated wastgates/arms.. and another with a group a t34 that wont make more than 25psi no matter how tight the actuator is.. he had the arm repaired twice already..
mine also went back once as wouldnt make more than 25psi and turbo technics said it would be fine as had the inconnel arm so i used a paint pen around the penny and shut it tight then when opened it hadent sealed properly .. they had to fix it again...
ive known 2 people recently one with a brand new t34 and one with t38 both have had bent or not seated wastgates/arms.. and another with a group a t34 that wont make more than 25psi no matter how tight the actuator is.. he had the arm repaired twice already..
well thats made my mind up the turbo will be coming off and going back to get checked out Cheers
Right got back from CR Turbos just now and refitted the turbo with new washer, arm etc and its still the fucking same the only other thing thats changed is it was a spare t34 that I used to get reconned but as it had pretty much all been replaced I cant see that being the problem oh and its now got a 70mm cooler from A.S.
thought I had found the problem going by the marks on the washer
have you got the old amal valve you can try just to try it and rule that out
Dont they need modding to up the boost tho?
Originally Posted by cossie4i
I hope you sort it Matt
Try changing back to the intercooler you was using ???
Steve
So do I mate
cant try the old cooler as I got rid of it as it was leaking starting to think it could be the boost controler so gunna try a bleed valve see what that does
So do I mate
cant try the old cooler as I got rid of it as it was leaking starting to think it could be the boost controler so gunna try a bleed valve see what that does
05-06-2010, 05:36 PM
More boost please (or a least help me find where its gone)
as I fitted the new actuator and stilll only getting 26psi this morning, was only 24psi over the weekend but the weather was hotter then
