FP 25psi Wastegate, Spike?
FP 25psi Wastegate, Spike?
So, I was wondering. Tuesday I'll be getting my 25psi wastegate from FP for my stock turbo. They said that I was the first one to buy 25psi gate that was not running the Green or the Red; so I'm not to sure what anyone will know about the spike it will create on stock turbo... But now I must ask!
What is everyones "guess" on how the 25psi Wastegate will function on the stock IX tubro? How many pounds will I spike with it preloaded? Is 33-35lbs safe on spike with M15 meth jet on 100% meth? Is it possible to hold more boost out the topend, because if I spike more I should have less taper becasue of the more boost that the gate has to bleed out, correct?
I'm currently spiking 30lbs and holding 22lbs by 6800rpms. I'm also on stock wastegate but it is preloaded as far as it can go. I may preload the 25psi wastegate too because I have heard that if you don't preload it it may open prematurely. Also if you have a green with the 25psi wastegate any input would be great!
All my mods are in my sig. If I'm completely snowballing this you can tell me
What is everyones "guess" on how the 25psi Wastegate will function on the stock IX tubro? How many pounds will I spike with it preloaded? Is 33-35lbs safe on spike with M15 meth jet on 100% meth? Is it possible to hold more boost out the topend, because if I spike more I should have less taper becasue of the more boost that the gate has to bleed out, correct?
I'm currently spiking 30lbs and holding 22lbs by 6800rpms. I'm also on stock wastegate but it is preloaded as far as it can go. I may preload the 25psi wastegate too because I have heard that if you don't preload it it may open prematurely. Also if you have a green with the 25psi wastegate any input would be great!
All my mods are in my sig. If I'm completely snowballing this you can tell me
Proper preload procedure is:
- Line up the WGA arm so it slides easily onto the flapper arm
- Tighten the nut 3 full turns (6 half turns)
- The WGA arm will now not fit easily onto the flapper, but with some effort you can get it on
Just turn your boost controller all the way down and make sure it's working fine @ 25psi and turn it up from there. A 30+ psi spike on meth is not a problem.
I wouldn't expect much more than 22 psi at redline, to be honest... and even so, the turbo is so far out of its efficiency that you are blowing some furiously hot air.
- Line up the WGA arm so it slides easily onto the flapper arm
- Tighten the nut 3 full turns (6 half turns)
- The WGA arm will now not fit easily onto the flapper, but with some effort you can get it on
Just turn your boost controller all the way down and make sure it's working fine @ 25psi and turn it up from there. A 30+ psi spike on meth is not a problem.
I wouldn't expect much more than 22 psi at redline, to be honest... and even so, the turbo is so far out of its efficiency that you are blowing some furiously hot air.
I have the 18 psi wastegate and I plan on doing a 32 psi spike and let the thing taper right now I hit 26 and taper to about 20-21 by 7300rpm. There is no sense in making a turbo work harder then it should for a couple WHP... just my .02
I also think that with the new jet your going to pick up enough power anyway!
Cory
I also think that with the new jet your going to pick up enough power anyway!
Cory
Hmmmm, sounds like you should be asking whomever told you to go this route...Your note going to get more air out of the turbo because you are surpassing its limits....Additionally any pressure increase you see is just hot air which will make your car more prone to knock (PV=nRT you want to maximize n for power....most use P as the judge because there is no n gauge 
although you could log airflow...) Personally I would not recommend the route you are taking and just use a 18 psi WGA for your application....
although you could log airflow...) Personally I would not recommend the route you are taking and just use a 18 psi WGA for your application....
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Hmmmm, sounds like you should be asking whomever told you to go this route...Your note going to get more air out of the turbo because you are surpassing its limits....Additionally any pressure increase you see is just hot air which will make your car more prone to knock (PV=nRT you want to maximize n for power....most use P as the judge because there is no n gauge although you could log airflow...) Personally I would not recommend the route you are taking and just use a 18 psi WGA for your application....
although you could log airflow...) Personally I would not recommend the route you are taking and just use a 18 psi WGA for your application....
Hmmmm, sounds like you should be asking whomever told you to go this route...Your note going to get more air out of the turbo because you are surpassing its limits....Additionally any pressure increase you see is just hot air which will make your car more prone to knock (PV=nRT you want to maximize n for power....most use P as the judge because there is no n gauge although you could log airflow...) Personally I would not recommend the route you are taking and just use a 18 psi WGA for your application....
although you could log airflow...) Personally I would not recommend the route you are taking and just use a 18 psi WGA for your application..... Right now with the M10 I'm able to run as much timing as E85. I just want to see what the car will do; I know what people say it wont do but if everyone stopped there then life wouldn't be where it is now, would it? I was asking for ideas on what people think may happen and I'll find out Friday and I'll post it in the dyno threads. It might not make more power but only time will tell.
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From: Chi-Town
maybe this is the wrong thread to ask but i have a pretty much stock 9 with a tune and my boost goes up to 23.5 then tapers down to 20 ish then but up to 23.5 then back down to 20..The first time when it tapers down is real quick. then it shoots up this all occurs between lets say 2k and 7k rpm
maybe this is the wrong thread to ask but i have a pretty much stock 9 with a tune and my boost goes up to 23.5 then tapers down to 20 ish then but up to 23.5 then back down to 20..The first time when it tapers down is real quick. then it shoots up this all occurs between lets say 2k and 7k rpm
To run over 32 PSI peak on a 25 PSI actuator, I´d try preloading the spring to between 28 and 30 PSI. Then, the 3 to 4 PSI above that I´d control with the boost controller.
When you install your new WGA do as follows....Connect a hose from the WGA´s port to the nipple on the compressor housing discharge tube. Install the turnbuckle onto the flapper valve´s pivot arm and then proceed to rotate the turnbuckle in three full turns.
This should get you to about 27 to 28 PSI of spring pressure. Take it for a WOT run to verify. Then you can add another turn or turn and a half, as needed, to get it up to 28 to 30 PSI. Confirm by taking for another WOT run.
This is kinda time consuming(as you´ll have to let things cool down before fiddling with it) but you will be able to get it right on the money this way.
Last edited by sparky; Jul 12, 2009 at 04:03 PM.
What do you mean by, ¨ït is preloaded as far as it can go¨?
To run over 32 PSI peak on a 25 PSI actuator, I´d try preloading the spring to between 28 and 30 PSI. Then, the 3 to 4 PSI above that I´d control with the boost controller.
When you install your new WGA do as follows....Connect a hose from the WGA´s port to the nipple on the compressor housing discharge tube. Install the turnbuckle onto the flapper valve´s pivot arm and then proceed to rotate the turnbuckle in three full turns.
This should get you to about 27 to 28 PSI of spring pressure. Take it for a WOT run to verify. Then you can add another turn or turn and a half, as needed, to get it up to 28 to 30 PSI. Confirm by taking for another WOT run.
This is kinda time consuming(as you´ll have to let things cool down before fiddling with it) but you will be able to get it right on the money this way.
To run over 32 PSI peak on a 25 PSI actuator, I´d try preloading the spring to between 28 and 30 PSI. Then, the 3 to 4 PSI above that I´d control with the boost controller.
When you install your new WGA do as follows....Connect a hose from the WGA´s port to the nipple on the compressor housing discharge tube. Install the turnbuckle onto the flapper valve´s pivot arm and then proceed to rotate the turnbuckle in three full turns.
This should get you to about 27 to 28 PSI of spring pressure. Take it for a WOT run to verify. Then you can add another turn or turn and a half, as needed, to get it up to 28 to 30 PSI. Confirm by taking for another WOT run.
This is kinda time consuming(as you´ll have to let things cool down before fiddling with it) but you will be able to get it right on the money this way.
Also if I have an open dump, it will only open during spike with the 25psi gate, then it will remain closed since i'll be tapering to like 23lbs?
That will sound weird.