Procharger proflow not holding boost! Help
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
When the car was getting tuned on a dyno, the operator said that it was making about 5lbs of boost with bad springs getting alot of valve float up top, but now the problem is fixed.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
I was reading one of your stick's about the 4l60e survival. My tranny temps never see temps above 170 degrees, but about a year ago that was not the case. I have a huge cooler now
On a side note when the tranny gets lock in 4th it seems to kind of shifts hard, I don't like how it shift just in 4th. The tranny fluid has been changed and the previous owner said that this tranny is pro built he spent 4 grand to have it built up. Any thoughts?
On a side note when the tranny gets lock in 4th it seems to kind of shifts hard, I don't like how it shift just in 4th. The tranny fluid has been changed and the previous owner said that this tranny is pro built he spent 4 grand to have it built up. Any thoughts?
I was reading one of your stick's about the 4l60e survival. My tranny temps never see temps above 170 degrees, but about a year ago that was not the case. I have a huge cooler now
On a side note when the tranny gets lock in 4th it seems to kind of shifts hard, I don't like how it shift just in 4th. The tranny fluid has been changed and the previous owner said that this tranny is pro built he spent 4 grand to have it built up. Any thoughts?
On a side note when the tranny gets lock in 4th it seems to kind of shifts hard, I don't like how it shift just in 4th. The tranny fluid has been changed and the previous owner said that this tranny is pro built he spent 4 grand to have it built up. Any thoughts?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
As mentioned, that’s a pretty small blower for that engine anyway… you should calculate the max rpm you can spin it to and shoot for that. I believe it’s 68k on the D1SC.
3.42 gears seem pretty tall too. Since boost is RPM based, I’d think you’d want more gear in it? Then once you spin the blower spinning faster, belt slip rears its ugly head. Good luck with it. I’ve had nothing but problems with them. The F1 is the unit I’d be looking at!
3.42 gears seem pretty tall too. Since boost is RPM based, I’d think you’d want more gear in it? Then once you spin the blower spinning faster, belt slip rears its ugly head. Good luck with it. I’ve had nothing but problems with them. The F1 is the unit I’d be looking at!
As mentioned, that’s a pretty small blower for that engine anyway… you should calculate the max rpm you can spin it to and shoot for that. I believe it’s 68k on the D1SC.
3.42 gears seem pretty tall too. Since boost is RPM based, I’d think you’d want more gear in it? Then once you spin the blower spinning faster, belt slip rears its ugly head. Good luck with it. I’ve had nothing but problems with them. The F1 is the unit I’d be looking at!
3.42 gears seem pretty tall too. Since boost is RPM based, I’d think you’d want more gear in it? Then once you spin the blower spinning faster, belt slip rears its ugly head. Good luck with it. I’ve had nothing but problems with them. The F1 is the unit I’d be looking at!
I was thinking more along the lines of… an LS6 is 400+hp from the factory… Add the ported heads, intake, and cam it should be around 500+HP na. Also If it’s forged… has it also been bored/stroked? I’m just saying it’s a healthy engine to start with for that head unit. And the D1SC production kits don’t have the best reputation for belt slip when spun near max RPM.
I was thinking more along the lines of… an LS6 is 400+hp from the factory… Add the ported heads, intake, and cam it should be around 500+HP na. Also If it’s forged… has it also been bored/stroked? I’m just saying it’s a healthy engine to start with for that head unit. And the D1SC production kits don’t have the best reputation for belt slip when spun near max RPM.
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
Guess what guys, I fixed it, It wasn't a major leak at all, I mean still needed those 2 45's rubber elbows, but my problem was belt slippage. The car was serviced 6 months ago with a new green back belt, well by now it was broken in and needed to be tighned and slipping. On the A&A newer bracket I have it in the middle on the green back, Is this ok? I don't want to brake another tensioner again.
Now showing more that 5 lbs more like 7 where its supposed to be. The car absolutly rips now. Any other suggestions
Thank You all for your help and comments well appreciated.
Now showing more that 5 lbs more like 7 where its supposed to be. The car absolutly rips now. Any other suggestions
Thank You all for your help and comments well appreciated.
1st post I was wondering about belt slip lol. Its really easy to assume its something else and ends up being belt slip...I went down the same road as you thinking it was my bypass valve. Added a 2nd bracket that a member on here made for me and all of a sudden I was making more boost. Glad you found it.
I'm glad to see you found the boost leak Chris. A lot of very knowledgeable forum members added their input to this thread! Bob
__________________
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
Ok here's the story, yesterday I was hitting about 7.5 lbs of boost after tightening the adjustment nut on the procharger bracket, its in the middle section on the same belt that I had on about 6 months now, its broken in. Its a gates greenback 060930HD, the ribs look good on the inside, but you can tell it was stretched on the green part, well today I go wideopen throttle on the street and the boost is not holding again, it dropped off just after 5lbs, so I think I am slipping again up top, should I just go ahead and buy a new belt. I liked the micro v 060930. Does it matter should the current belt still hold or has it lost its rigidity. Thoughts
Also when the car locks up in 4th, its smoother but there is still some flex slight shaking even thought the belt is tight now on the crank. When I had the micro v belt the shift in 4th was clean and smooth. It just seems like this current belt is rubbery, does this make sense, anyone know what I am talking about. Whereas when I had the micro v belt it was not so rubbery but more solid. I don't know how else to explain it.
Would it make a difference to buy another belt vs the one I have on now? This is on a 6 rib setup.
Last edited by corvet786c; Jan 13, 2018 at 01:59 PM.
TECH Fanatic
Joined: Jun 2003
Posts: 1,869
Likes: 99
Is your crank pulley pinned or not?
Back in the day (2005 or so) the six rib pulley's slipped a lot. As a result ATI came out with an 8 rib pulley along with a way to pin the pulley to the crankshaft . Key it in a sense with a roll pin to keep the pulley from slipping on the crankshaft.
That said, even the 8 rib belts slip when going over 8 lbs or so.
Bob has the pinning kit as a loaner I think.
Whew - that's a long belt - 93 or so inches - sure that's the right number?
Gates numbers are usually K060930 - with the 6 meaning it's a 6 rib.
Back in the day (2005 or so) the six rib pulley's slipped a lot. As a result ATI came out with an 8 rib pulley along with a way to pin the pulley to the crankshaft . Key it in a sense with a roll pin to keep the pulley from slipping on the crankshaft.
That said, even the 8 rib belts slip when going over 8 lbs or so.
Bob has the pinning kit as a loaner I think.
Whew - that's a long belt - 93 or so inches - sure that's the right number?
Gates numbers are usually K060930 - with the 6 meaning it's a 6 rib.
Last edited by dlandsvZ28; Jan 13, 2018 at 03:43 PM.
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
Is your crank pulley pinned or not?
Back in the day (2005 or so) the six rib pulley's slipped a lot. As a result ATI came out with an 8 rib pulley along with a way to pin the pulley to the crankshaft . Key it in a sense with a roll pin to keep the pulley from slipping on the crankshaft.
That said, even the 8 rib belts slip when going over 8 lbs or so.
Bob has the pinning kit as a loaner I think.
Whew - that's a long belt - 93 or so inches - sure that's the right number?
Gates numbers are usually K060930 - with the 6 meaning it's a 6 rib.
Back in the day (2005 or so) the six rib pulley's slipped a lot. As a result ATI came out with an 8 rib pulley along with a way to pin the pulley to the crankshaft . Key it in a sense with a roll pin to keep the pulley from slipping on the crankshaft.
That said, even the 8 rib belts slip when going over 8 lbs or so.
Bob has the pinning kit as a loaner I think.
Whew - that's a long belt - 93 or so inches - sure that's the right number?
Gates numbers are usually K060930 - with the 6 meaning it's a 6 rib.
Once a belt has slipped for awhile, it gets glazed and is more prone to slippage. I'd put a new belt on it and take it easy on it for an hour to let it break in, then re-tighten it. Bob
__________________
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website