New Procharger Support Bracket
02-25-2009, 07:49 AM
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New Procharger Support Bracket I thought I had everything in place when I took my new setup to the dyno (new 408, F1, EPP FMIC, SDCE tesnioner, Nasty fuel system, etc). I knew my initial tune wasn't going to be perfect - my goal is 800rw & I only made a little over 700 - but it quit making power around 5k even tho we got the A/F dialed in.
Like all of us do when things don't work out I took the car home scratching my head & looking for answers. What I wasn't expecting to find was I bent my hex alum stand-offs that hold the S/C onto the motor.
So figuring that had to mean my F1 was flexing under load I made a new support bracket that ties the top of the ATI bracket to the motor (3 water pump & 1 head bolt hole) with steel stand-offs & grade 8 bolts. Before I could make the head unit move by pushing on it. Now it's rock solid!
I haven't gone back to dyno it yet, but it feels stronger playing on the street and it is making a little more boost. (not sure exactly how much, it's hard to watch that gauge when the ***-end of the car is dancing around at 90mph) If nothing else, the blower should stayed attached to the motor now!
Mark
Like all of us do when things don't work out I took the car home scratching my head & looking for answers. What I wasn't expecting to find was I bent my hex alum stand-offs that hold the S/C onto the motor.
So figuring that had to mean my F1 was flexing under load I made a new support bracket that ties the top of the ATI bracket to the motor (3 water pump & 1 head bolt hole) with steel stand-offs & grade 8 bolts. Before I could make the head unit move by pushing on it. Now it's rock solid!
I haven't gone back to dyno it yet, but it feels stronger playing on the street and it is making a little more boost. (not sure exactly how much, it's hard to watch that gauge when the ***-end of the car is dancing around at 90mph) If nothing else, the blower should stayed attached to the motor now!
Mark
02-25-2009, 10:44 AM
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I can take one, but I doubt you can see it in a picture. I have an SDCE tensioner, which comes with a bracket to tie the outside of the S/C to the oil pan, and it still moved.
The way I looked at this was I have 2 main attach points that are more or less vertical (iron block issue). So make a triangle. But I see your point, the bottom is where it's moving. Adding support to that area would be difficult....
The way I looked at this was I have 2 main attach points that are more or less vertical (iron block issue). So make a triangle. But I see your point, the bottom is where it's moving. Adding support to that area would be difficult....
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02-25-2009, 08:56 PM
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You're dead-on KP...as usual. It's the missing 3rd mounting bolt that alum blocks have & iron blocks don't that is the issue. I was suprised it would still move with the additional support brace the SDCE comes with. But when you figure it takes 2-300hp to turn an F1.....I'll try to get a pic of the stand-off on a flat surface.
What scared me was a couple stories I heard where people actually broke their S/Cs off the motor (1000hp range cars).
What scared me was a couple stories I heard where people actually broke their S/Cs off the motor (1000hp range cars).
02-25-2009, 09:54 PM
#9
You're dead-on KP...as usual. It's the missing 3rd mounting bolt that alum blocks have & iron blocks don't that is the issue. I was suprised it would still move with the additional support brace the SDCE comes with. But when you figure it takes 2-300hp to turn an F1.....I'll try to get a pic of the stand-off on a flat surface.
What scared me was a couple stories I heard where people actually broke their S/Cs off the motor (1000hp range cars).
What scared me was a couple stories I heard where people actually broke their S/Cs off the motor (1000hp range cars).
A couple years ago I took put a video camera on the blower with a steel J bracket/SDCE/F1A and aluminum block at 7000rpm and I was amazed how much that bracket moved around. It looked like it was made of rubber, so I cant imagine losing that one bolt on an iron block how much it moves around. I dont know if it takes that much to drive one, hard to get a straight answer on it but its a lot and hard on the brackets thats for sure.
02-26-2009, 01:05 PM
#15
does the LSX race block have the 3rd hole needed for the procharger?
Looks like people need the steel bracket, sdce tensioner brace, (or aster's piece) plus this support bracket to combat flex when running the F series blowers.
Looks like people need the steel bracket, sdce tensioner brace, (or aster's piece) plus this support bracket to combat flex when running the F series blowers.
02-26-2009, 02:40 PM
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And thank you!!! It took me a while.
02-27-2009, 08:53 PM
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I looked ALL over the garage for the bent stand-off today. I must have thrown it away. 
But at least while cleaning the garage I got inspired & finally installed my Madman offset LCAs & re-torqued my intake bolts....tommorow I'll try SD tuning the car so I can go get some more dyno #s & see how this bracket holds up.
But at least while cleaning the garage I got inspired & finally installed my Madman offset LCAs & re-torqued my intake bolts....tommorow I'll try SD tuning the car so I can go get some more dyno #s & see how this bracket holds up.
