Guru, Tial, dual, single-WG confusion-HELP!
08-25-2004, 12:57 AM
#16
Rennlist Junkie Forever
Mike Murcia
>>>Try telling Markus Blaszak that. I tried, but some people are very set in their ways. I think he rebuilds them, and this was the main reason he was defending the stock unit<<<
I'd have no problem telling him that.
And... you've hit the nail on the head.....
The margin is much larger on a modified stock unit.
TonyG
>>>Try telling Markus Blaszak that. I tried, but some people are very set in their ways. I think he rebuilds them, and this was the main reason he was defending the stock unit<<<
I'd have no problem telling him that.
And... you've hit the nail on the head.....
The margin is much larger on a modified stock unit.
TonyG
08-25-2004, 11:59 AM
#19
Rennlist Member
Originally Posted by TonyG
Blueman33
A Tial 46mm (which is the only Tial I'd buy) is 10x better than any stock or modified stock wastegate... Period.
And yes... I've had 2 "rebuilt and modified" stock wastegates.. they suck compared to a Tial 46mm.
The more power you make... the bigger the difference. Even stock... the stock wastegates are junk.
Get a Tial 46mm wastegate, and a manual black-**** boost controller with a 1 bar spring.
It will be rock solid.
TonyG
daniel951
A Tial 46mm (which is the only Tial I'd buy) is 10x better than any stock or modified stock wastegate... Period.
And yes... I've had 2 "rebuilt and modified" stock wastegates.. they suck compared to a Tial 46mm.
The more power you make... the bigger the difference. Even stock... the stock wastegates are junk.
Get a Tial 46mm wastegate, and a manual black-**** boost controller with a 1 bar spring.
It will be rock solid.
TonyG
daniel951
So you would not use the 38mm?? If it flows enough that it doesn't cause boost creep at high rmps, whats the reason to go with bigger?
Thanks.
08-25-2004, 12:33 PM
#20
Rocket Scientist
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Is there a problem with running a 46mm wastegate when you dont have high boost or a lot of power? Can you still adjust the spring to as low as .65 bar or 1 bar?
08-25-2004, 12:59 PM
#21
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I ran A 46mm on a chipped car with a .6 bar spring. Now over 300rwhp and a 1 bar spring. Never had a problem. I also used Tony G's set up, 1bar and black **** mbc with no problems..
ps Tial has springs from .2 bar to 1.4 bar then you mix and match after that, With 2 springs to make what ever you want.
ps Tial has springs from .2 bar to 1.4 bar then you mix and match after that, With 2 springs to make what ever you want.
Last edited by evil 944t; 08-25-2004 at 01:03 PM. Reason: add info
08-25-2004, 01:26 PM
#22
Even the 38 is good enough with the 15 psi spring. Use an MBC with it. You cannot compare a real wastegate like the Tial to the clowngate that Porsche put on these cars. Any real boost pressure will open the stock gate, no matter how many doo-dads, knick-knacks, bells, whistles or other bull**** you staple onto it.
08-25-2004, 01:50 PM
#23
Rennlist Junkie Forever
The difference between the 38mm and 46mm Tial are more than the size of the valve. The construction materials are different. The 46mm can withstand more heat, which means it's more reliable.
The heat that is exposed to a wastegate on a 951 running 12psi is more than the the heat exposed to a 951 running 20psi. This is because when running 12psi, the wastegate passes through more exhaust gas than it would on the same car running 20psi. The egt's are the same (or should be at least).
Lastly, a smaller valve, has to open more than a larger valve to flow the same quantity of gas. Given this fact, it's easy to see how you can regulate gas flow more accurately when the valve has to open less to flow a given quantity of exhaust gas. Additionally... because the larger valve has to move less (to do the same job as the smaller valve), the larger valve will experience valve flutter less (more accurate boost).
TonyG
The heat that is exposed to a wastegate on a 951 running 12psi is more than the the heat exposed to a 951 running 20psi. This is because when running 12psi, the wastegate passes through more exhaust gas than it would on the same car running 20psi. The egt's are the same (or should be at least).
Lastly, a smaller valve, has to open more than a larger valve to flow the same quantity of gas. Given this fact, it's easy to see how you can regulate gas flow more accurately when the valve has to open less to flow a given quantity of exhaust gas. Additionally... because the larger valve has to move less (to do the same job as the smaller valve), the larger valve will experience valve flutter less (more accurate boost).
TonyG
08-25-2004, 07:25 PM
#24
Rennlist Member
Originally Posted by TonyG
The difference between the 38mm and 46mm Tial are more than the size of the valve. The construction materials are different. The 46mm can withstand more heat, which means it's more reliable.
The heat that is exposed to a wastegate on a 951 running 12psi is more than the the heat exposed to a 951 running 20psi. This is because when running 12psi, the wastegate passes through more exhaust gas than it would on the same car running 20psi. The egt's are the same (or should be at least).
Lastly, a smaller valve, has to open more than a larger valve to flow the same quantity of gas. Given this fact, it's easy to see how you can regulate gas flow more accurately when the valve has to open less to flow a given quantity of exhaust gas. Additionally... because the larger valve has to move less (to do the same job as the smaller valve), the larger valve will experience valve flutter less (more accurate boost).
TonyG
The heat that is exposed to a wastegate on a 951 running 12psi is more than the the heat exposed to a 951 running 20psi. This is because when running 12psi, the wastegate passes through more exhaust gas than it would on the same car running 20psi. The egt's are the same (or should be at least).
Lastly, a smaller valve, has to open more than a larger valve to flow the same quantity of gas. Given this fact, it's easy to see how you can regulate gas flow more accurately when the valve has to open less to flow a given quantity of exhaust gas. Additionally... because the larger valve has to move less (to do the same job as the smaller valve), the larger valve will experience valve flutter less (more accurate boost).
TonyG
08-26-2004, 06:35 AM
#27
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I'm gonna buy a tial 38mm with 0.8 and 1.0 bar springs. What do you recommand to use with the Guru 18 psi chips (and accuboost) ?
I was thinking to use the 1.0 bar spring and adjust with the accuboost (CV bypassed) but i fear to get some boost spikes over 18 psi due to the "strong" spring. Should i not use the 0.8 bar and accuboost instead ?
I was thinking to use the 1.0 bar spring and adjust with the accuboost (CV bypassed) but i fear to get some boost spikes over 18 psi due to the "strong" spring. Should i not use the 0.8 bar and accuboost instead ?
08-26-2004, 06:45 AM
#29
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Originally Posted by hosrom_951
The spring to is hold the LEAST boost you would be running
The accuboost also has spike protection..........
The accuboost also has spike protection..........