boost issue again
Senior Member
Joined: 01-13-2008
Posts: 4,708
From: Washington State, where it rains
I tied my lower IC duct back away from the AC pump with a zip tye...everything normal now, for now, will get me by till I take it in....I could fix this myself but feel GM needs a history of complaints to make any improvements..maybe next time they will pay closer attention to design clearences...I think its more of a motor mount problem...too soft-too much movement
Senior Member
Joined: 07-05-2008
Posts: 5,464
From: Akron Ohio
Stiffer mounts are not the answer. If these were older cars it could be wear but these are new car.
A stiffer mount would only bring more complaints of noise and viberation with a 4 cylinder. There is really not any more movement than most other cars.
The big issue is the Upgrade T map is a different angle than the stock one. The Bosch unit was originally used in a Alfa Romeo. That is why the tube needed modified.
GM tried to use an off the shelf part as they only needed a 3 bar T map. This is also why there is a change in the connector.
IF GM had to have a new T map made just for this we would have had more much cost added to the purchase price and a good chance as these get got older that replacments would not be available.
Also I think the connectors are blaimed much too often for something they are not causing. They are a very reliable part if installed properly and will last the life of the car with no issues.
Also while some blaime the connectors I think this is only true in a small number of complaints and was just due to improper use of the connectors. Most do not have a bad connetion. These connectors if used properly will overate for the life of the car with no issue.
You can figure once they are done there will be less than 10,000 SS made and only 25% or less with the upgrade. By using an off the shelf part we will not get stuck later adapting our own unit if they become hard to find. This is a common Bosh unit.
Per the GMPD teams engineers recomendation to use fender washers to move the I/C forward it solves all the issues. The gap varies with each SS and some just need that 1/8 inch to clear with this T Map.
Also how far the tube is able to be pushed on seems to be a factor. My first tube did not hit but the second one did. My first tube blew out an I only had issues once the second tube was installed.
A stiffer mount would only bring more complaints of noise and viberation with a 4 cylinder. There is really not any more movement than most other cars.
The big issue is the Upgrade T map is a different angle than the stock one. The Bosch unit was originally used in a Alfa Romeo. That is why the tube needed modified.
GM tried to use an off the shelf part as they only needed a 3 bar T map. This is also why there is a change in the connector.
IF GM had to have a new T map made just for this we would have had more much cost added to the purchase price and a good chance as these get got older that replacments would not be available.
Also I think the connectors are blaimed much too often for something they are not causing. They are a very reliable part if installed properly and will last the life of the car with no issues.
Also while some blaime the connectors I think this is only true in a small number of complaints and was just due to improper use of the connectors. Most do not have a bad connetion. These connectors if used properly will overate for the life of the car with no issue.
You can figure once they are done there will be less than 10,000 SS made and only 25% or less with the upgrade. By using an off the shelf part we will not get stuck later adapting our own unit if they become hard to find. This is a common Bosh unit.
Per the GMPD teams engineers recomendation to use fender washers to move the I/C forward it solves all the issues. The gap varies with each SS and some just need that 1/8 inch to clear with this T Map.
Also how far the tube is able to be pushed on seems to be a factor. My first tube did not hit but the second one did. My first tube blew out an I only had issues once the second tube was installed.
Senior Member
Joined: 11-07-2007
Posts: 1,613
From: Southside of Houston Texas
good answer and I still have all my factory parts, if someone needs them, I went aftermarket just because all the issues i was seeing. + the Polished stainless still looks really nice. The only issue I have had was one of the couplers became loose and blew off the turbo intake and popped up hit the hood. now I got a nice dent in the hood. But oh well all in a days playing....
Senior Member
Joined: 01-13-2008
Posts: 4,708
From: Washington State, where it rains
...in MY case, there is excessive engine roll over...while in low gear in slow traffic( to stay off the brakes) just a slight touch of the gas petal will thump the eng quite a bit, the same when letting off...I wasn't saying all the SS cars have this,,,just something i noticed on mine..I'm sure it still would have rubbed thru eventually with less movement as there is next to no clearence there..thats why tying the IC back temp fixed mine....but I still have a lot of rock that thumps the whole car. and after dealing with my service guy today I really don't want them touching it...my other car was in for minors and they did everything they could NOT to have to fix them....really poor service...but ...sigh..they installed the kit so...................I will try first,
Senior Member
Joined: 07-10-2008
Posts: 423
From: Not necessarily Humbolt County
Per the GMPD teams engineers recomendation to use fender washers to move the I/C forward it solves all the issues. The gap varies with each SS and some just need that 1/8 inch to clear with this T Map.
Also how far the tube is able to be pushed on seems to be a factor. My first tube did not hit but the second one did. My first tube blew out an I only had issues once the second tube was installed.
Also how far the tube is able to be pushed on seems to be a factor. My first tube did not hit but the second one did. My first tube blew out an I only had issues once the second tube was installed.
I was thinking the lower hose could be trimmed at the IC and have the same affect if it becomes necessary.
Is it possible to rotate the map 180 degrees?
Senior Member
Joined: 07-10-2008
Posts: 423
From: Not necessarily Humbolt County
