10psi or 12psi
Joined: Oct 2000
Posts: 9,033
Likes: 21
From: South of the pier, Huntington Beach, CA
Originally Posted by chairmnofthboard,Sep 19 2007, 05:45 PM
If you were to upgrade your vortech, which would you go with?
things needed
10psi pulley, belt, 650 injectors
12psi pulley, belt, 650 injectors, 3 bar map
am i forgetting anything?
things needed
10psi pulley, belt, 650 injectors
12psi pulley, belt, 650 injectors, 3 bar map
am i forgetting anything?
Registered User
Joined: May 2006
Posts: 7,659
Likes: 3
From: Braselton, GA
Thats the biggest issue with FI.
If you go to 10psi on stock compression in theory say== 350whp 220tq
if you go to 12psi you need to add a 3mm hg for tuning ability and you go back down in compression even with the higher psi say 330whp 210 tq
So the only way to go from 10 psi without a hg is to go to 14+psi with a thicker one.
I know it may get flamed but its the only way it would make sense to go over the recommended 10psi max on a stock hg.
If you go to 10psi on stock compression in theory say== 350whp 220tq
if you go to 12psi you need to add a 3mm hg for tuning ability and you go back down in compression even with the higher psi say 330whp 210 tq
So the only way to go from 10 psi without a hg is to go to 14+psi with a thicker one.
I know it may get flamed but its the only way it would make sense to go over the recommended 10psi max on a stock hg.
Registered User
Joined: Sep 2005
Posts: 5,962
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From: Hong Kong/California
Originally Posted by ChefJ,Sep 19 2007, 07:01 PM
Thats the biggest issue with FI.
If you go to 10psi on stock compression in theory say== 350whp 220tq
if you go to 12psi you need to add a 3mm hg for tuning ability and you go back down in compression even with the higher psi say 330whp 210 tq
So the only way to go from 10 psi without a hg is to go to 14+psi with a thicker one.
I know it may get flamed but its the only way it would make sense to go over the recommended 10psi max on a stock hg.
If you go to 10psi on stock compression in theory say== 350whp 220tq
if you go to 12psi you need to add a 3mm hg for tuning ability and you go back down in compression even with the higher psi say 330whp 210 tq
So the only way to go from 10 psi without a hg is to go to 14+psi with a thicker one.
I know it may get flamed but its the only way it would make sense to go over the recommended 10psi max on a stock hg.
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Registered User
Joined: May 2006
Posts: 7,659
Likes: 3
From: Braselton, GA
Its possible at 12psi on a stock HG if the whp increases laterally with the increase in psi.
I would just have to trust my tuner alot to go into that range.
My point is 12psi with a 3mm HG is about the same as 8psi without one.
I would just have to trust my tuner alot to go into that range.
My point is 12psi with a 3mm HG is about the same as 8psi without one.
Registered User
Joined: Nov 2005
Posts: 521
Likes: 0
From: los angeles
im running 650cc injectors you could run 750cc as well i suppose..
13.8psi
.060"HG (double stock thickness)
3mm seems kinda think if your just going to 12psi... talk to a few tuners see what they say...
13.8psi
.060"HG (double stock thickness)
3mm seems kinda think if your just going to 12psi... talk to a few tuners see what they say...
