boostdrop after gearchange....??
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boostdrop after gearchange....??
After my problem with my turbo on my ZVH engine i've come across the next problem.
Did a quartermile sprint this weekend and i noticed that after i've changed gears it takes a while before i get ful boost again. This takes about half a second.
What could be causing this??
I've got a cosworth 4x4 intercooler at the front with a tube above the i/c to get the air back to the charge carrier side ... could this be to long??? i've already got a reverse charge carrier to shorthen this traject..!
But would this solve my problem..
Thanx again!!
Did a quartermile sprint this weekend and i noticed that after i've changed gears it takes a while before i get ful boost again. This takes about half a second.
What could be causing this??
I've got a cosworth 4x4 intercooler at the front with a tube above the i/c to get the air back to the charge carrier side ... could this be to long??? i've already got a reverse charge carrier to shorthen this traject..!
But would this solve my problem..
Thanx again!!
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Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
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Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
Otherwise as said at the top, turbo lag
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Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
run a small shot of nitrous then you will Eliminate that problem, i run nitrous purely for drag racing spools up the turbo Instantaneously between gear changes
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Originally Posted by turboboss
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
run a small shot of nitrous then you will Eliminate that problem, i run nitrous purely for drag racing spools up the turbo Instantaneously between gear changes
Mine doesn't use NOS and still has 2-Bar by just over 4000rpm.
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Originally Posted by Christian and Beccy
Originally Posted by turboboss
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
run a small shot of nitrous then you will Eliminate that problem, i run nitrous purely for drag racing spools up the turbo Instantaneously between gear changes
Mine doesn't use NOS and still has 2-Bar by just over 4000rpm.
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Originally Posted by Ad4m RST
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
Otherwise as said at the top, turbo lag
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Originally Posted by Gregor
Originally Posted by Ad4m RST
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
Otherwise as said at the top, turbo lag
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Originally Posted by Gregor
Originally Posted by Ad4m RST
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
Otherwise as said at the top, turbo lag
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Originally Posted by DaveyBoyS1
Originally Posted by Gregor
Originally Posted by Ad4m RST
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
Otherwise as said at the top, turbo lag
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Originally Posted by DaveyBoyS1
Originally Posted by DaveyBoyS1
Originally Posted by Gregor
Originally Posted by Ad4m RST
Originally Posted by Gregor
Wel.. when i'm doing above 3500 rpm when i'm in next gear i don't expect as much lag as i'm getting (it's not building boost or something, but just staying the same revvs it seems ) ... well anyway... and yess.. i've got a dumpvalve on it....
Otherwise as said at the top, turbo lag
gt series turbos are the bollocks i've ran one for the last three years, low lag they move a huge amount of air.you have to run a dump or blow off valve with these due to the thin shaft.only problem to repair them you have to get a new core which is not cheap
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Well, just took of the dumpvalve.... and got out on the street...
Could't really test it because it's a bit rainy over here and as soon as the turbo spins so do the wheels so it'll spin up quiker now anyway....
Hopefully a bit dryer tomorrow for some more testing but i don't think it wil make a big difference....
couldn't the long airintake be a couse of this all./...... otherwhise it's nothing else but TURBOLAG>>>>
Could't really test it because it's a bit rainy over here and as soon as the turbo spins so do the wheels so it'll spin up quiker now anyway....
Hopefully a bit dryer tomorrow for some more testing but i don't think it wil make a big difference....
couldn't the long airintake be a couse of this all./...... otherwhise it's nothing else but TURBOLAG>>>>
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tested it today.... when i'm high in revvs and change quick the wheels spin in 2nd andn boost is there instantly. When it does't spin it drops in revvs more and takes a while before it picks up properly.....
I hate LAG....
I hate LAG....
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Originally Posted by Gregor
tested it today.... when i'm high in revvs and change quick the wheels spin in 2nd andn boost is there instantly. When it does't spin it drops in revvs more and takes a while before it picks up properly.....
I hate LAG....
I hate LAG....
what gearbox are r you running?
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Standard box for now with ap fast road clutch.
It's making really weird noises so am looking for an uprated item but dunno what kind yet..
It's making really weird noises so am looking for an uprated item but dunno what kind yet..
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Originally Posted by Ad4m RST
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I got one from CTS, shipped to Holland. no probs. only downside is paying for the shipping costs which is quite high considering the weight, and you pay extra for doing an outright purchase.
however, you will get a very decent box that will take alot of abuse
however, you will get a very decent box that will take alot of abuse
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Originally Posted by Arjan
I got one from CTS, shipped to Holland. no probs. only downside is paying for the shipping costs which is quite high considering the weight, and you pay extra for doing an outright purchase.
however, you will get a very decent box that will take alot of abuse
however, you will get a very decent box that will take alot of abuse
What stage of box have you got?
What are the total costs if i may ask?
If it's to expencive to send i'll just have to pick it up there
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Well.. got the aluminium rad. and cts box in for a while now but i'm stil not happy with that turbo....
really want to get some decent boost @ arround 2500 rpm or so.
i've got a stage 3 turbo now ( 0.48 exhaust hausing, cosworth comp. wheel , 360 degr. bearing )
Whould it be better for a quicker spin up to put on a standard turbine and housing ( 0.36 ).
Doesn't have to run silly amounts of boost, arrond 18 psi.
Or just go to all standard Turbo ( for now ) wich spins up quick enough ( so i've heard ) on a ZVH engine.
Thanks
really want to get some decent boost @ arround 2500 rpm or so.
i've got a stage 3 turbo now ( 0.48 exhaust hausing, cosworth comp. wheel , 360 degr. bearing )
Whould it be better for a quicker spin up to put on a standard turbine and housing ( 0.36 ).
Doesn't have to run silly amounts of boost, arrond 18 psi.
Or just go to all standard Turbo ( for now ) wich spins up quick enough ( so i've heard ) on a ZVH engine.
Thanks