S/C and lag!
10-18-2001, 04:31 PM
#1
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S/C and lag!
At first I thought it could be the tranny, but since I got Don's VB mod, it couldn't be. Before I got the S/C, I didn't have this lag. This lag happens from time to time. I got this lag again today when I was trying to mess with a 5.0 Mustang. Anyway, the Mustang speed up just a bit to kind of show off, so I tried to do the same. This was on a long stretch of a street, I was going about 20mph. As I saw the Mustang speed off, I hit the gas, but got no acceleration. I didn't get the usual tire screeching take off I would normally get. I just wonder do any of you S/C guys have similar experiences? I don't know if it's a boost leak, maybe I need to replace the stock fuel pump, I just don't know. I'm hoping that someone has similar experiences. Btw, I already have the mod to have my fuel pump on at all times. Somehow I think it might have something to do with fuel. That's just a guess of course since I'm a newbie to this. Any advice would be appreciated. Thanks.
Michael
Michael
10-18-2001, 04:53 PM
#4
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Join Date: Jul 2001
Posts: 7,400
Originally posted by SprintMax
AUTO
AUTO
While you are frantic trying to shift, he'll blow by you with the back seat rolled back waving. All pimp like.
10-18-2001, 04:56 PM
#5
well if you didn't have lag before.. i don't see why the SC would put on additional lag..
my guess is you have auto disease.. where the tranny doesn't know what gear it is in.. and it doesn't kick down.. it just keeps going..
like that magical moment at about 15/20 mph where the tranny doesn't know 1st or 2nd.. and it stays in 2nd? you know what i am talking about?
my guess is you have auto disease.. where the tranny doesn't know what gear it is in.. and it doesn't kick down.. it just keeps going..
like that magical moment at about 15/20 mph where the tranny doesn't know 1st or 2nd.. and it stays in 2nd? you know what i am talking about?
10-18-2001, 07:22 PM
#15
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Posts: 1,452
Originally posted by SprintMax
my guess is you have auto disease.. where the tranny doesn't know what gear it is in.. and it doesn't kick down.. it just keeps going..
my guess is you have auto disease.. where the tranny doesn't know what gear it is in.. and it doesn't kick down.. it just keeps going..
That's funny till it actually happens. With good care of the transmission it'll prevent it, but how many of us are going to be "careful" with a supercharger under the hood I think Sprints right
.. Auto ain't horrid, just look at Don. But for overall wear and tear with hard driving, I think a 5 speed will last longer.
10-18-2001, 08:17 PM
#16
have you checked the belt tension on the s/c.. perhaps it's slipping?
I used to get major lag/bog on occasion (5spd) until I went to adjust the tension pulley and found the tension rod was missing.
I used to get major lag/bog on occasion (5spd) until I went to adjust the tension pulley and found the tension rod was missing.
10-18-2001, 08:19 PM
#17
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Ok, your power is there, obviously since you have a S/C. What it boils down to is your transmission. I too have an auto, damnit, and I have also experienced "lag" in my moving launches. What it boils down to is the tranny ecu and the transmission. When you are going about 15-23 m.p.h. and you floor it, the tranny ecu "can't make up its mind in time"(in lamen's terms) on what gear to put the car in at that point in time. So, that is where that lag comes in. I have done it many times, especially with my NOS, that is why I try to keep my "flooring" down to when I am fully stopped. Well, maybe someone can give you a fix to this problem (get a 5-speed 
), but it is just something that you will have to deal with as many of us do as well. Sorry.
), but it is just something that you will have to deal with as many of us do as well. Sorry.
10-19-2001, 01:56 AM
#21
its not auto.
its the fuel pump. I think you have it hooked up the stillen way.
if you remove the 2 way tee and put it straight on, you have the fuel pump running all the time, instead of only when you have boost. (im referring to the 2 way tee right off the blue circular fmu thing-a-ma-bob)
granted, its annoying when you wanna just sit there n roll down yer windows.. without engine running, and yer freakin fuel pump is churning.. but hey, it reduces me to that nice throttle body lag.
i could be wrong, but this is the way it seems to work on my, skimax, and cheston's cars..
its the fuel pump. I think you have it hooked up the stillen way.
if you remove the 2 way tee and put it straight on, you have the fuel pump running all the time, instead of only when you have boost.
(im referring to the 2 way tee right off the blue circular fmu thing-a-ma-bob) granted, its annoying when you wanna just sit there n roll down yer windows.. without engine running, and yer freakin fuel pump is churning.. but hey, it reduces me to that nice throttle body lag.
i could be wrong, but this is the way it seems to work on my, skimax, and cheston's cars..
10-19-2001, 04:39 AM
#23
he said he already already elimated the hobbs switch in the original post.
Originally posted by OgreDave
its not auto.
its the fuel pump. I think you have it hooked up the stillen way.
if you remove the 2 way tee and put it straight on, you have the fuel pump running all the time, instead of only when you have boost. (im referring to the 2 way tee right off the blue circular fmu thing-a-ma-bob)
granted, its annoying when you wanna just sit there n roll down yer windows.. without engine running, and yer freakin fuel pump is churning.. but hey, it reduces me to that nice throttle body lag.
i could be wrong, but this is the way it seems to work on my, skimax, and cheston's cars..
its not auto.
its the fuel pump. I think you have it hooked up the stillen way.
if you remove the 2 way tee and put it straight on, you have the fuel pump running all the time, instead of only when you have boost.
(im referring to the 2 way tee right off the blue circular fmu thing-a-ma-bob) granted, its annoying when you wanna just sit there n roll down yer windows.. without engine running, and yer freakin fuel pump is churning.. but hey, it reduces me to that nice throttle body lag.
i could be wrong, but this is the way it seems to work on my, skimax, and cheston's cars..
10-19-2001, 06:32 AM
#24
Good advice!!!
Originally posted by yo_its_ok
When driving an auto.....when you rolling, and speedo says 20, gun it, and it lags, slam the SOB shifter into 1, and roast da meat...off your tires...
-A few words of advice, brought to you by yo_its_ok.
When driving an auto.....when you rolling, and speedo says 20, gun it, and it lags, slam the SOB shifter into 1, and roast da meat...off your tires...
-A few words of advice, brought to you by yo_its_ok.
10-19-2001, 06:45 AM
#26
Originally posted by yo_its_ok
When driving an auto.....when you rolling, and speedo says 20, gun it, and it lags, slam the SOB shifter into 1, and roast da meat...off your tires...
-A few words of advice, brought to you by yo_its_ok.
When driving an auto.....when you rolling, and speedo says 20, gun it, and it lags, slam the SOB shifter into 1, and roast da meat...off your tires...
-A few words of advice, brought to you by yo_its_ok.
10-19-2001, 07:06 AM
#27
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Alright guys... I am going to lay it down here
First of all, I have several little issues with the SC setup. One of which is a definite lag or lack of throttle response. I am NOT auto, and I do not have the stupid Stillen Fuel pump. I have done everything I can think of to cure this other than being brutal to the car on launches. I notice this in 1st gear alot. I am going to go with Brett here and say that it could be the belt, actually I plan to go home today after a brief stop at sears and work on the belt tension as well as investigating for other possible boost/vaccuum leaks. I think that the problem that Cumalot and I are both experiencing is due to a leak of some sort. As Matt can vouch for, my setup has a lot more connections and stuff where boost leak or vaccuum leak could be the culprit than most SC setups. Anyways, I generally don't like posting about my issues here on the org. But as much as I am not a fan of Auto's I don't think this issue is to be pinned solely on the tranny. It is something else.
10-19-2001, 07:21 AM
#29
Hey Big D... make sure you don't tighten the belt too much or it'll snap.
What's a good tension? When you can't twist the belt greater than 90 degrees with your thumb and index finger (do this between the crank and ac pulleys).
What's a good tension? When you can't twist the belt greater than 90 degrees with your thumb and index finger (do this between the crank and ac pulleys).
10-19-2001, 07:22 AM
#30
Besides only 8-9psi with a 3.25" pulley (SB 10-11psi), my SC system is working fine. No lag.
I was thinking though, you and Mike had a similar problem, an oil leak. Perhaps the belt is too slipery and needs to be degreased. I tried to degrease Mikes when I fixed the leak, but perhaps I didnt get it clean enough.
I was thinking though, you and Mike had a similar problem, an oil leak. Perhaps the belt is too slipery and needs to be degreased. I tried to degrease Mikes when I fixed the leak, but perhaps I didnt get it clean enough.
10-19-2001, 07:25 AM
#31
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I will simplegreen that summa***** tonight
Originally posted by MardiGrasMax
Besides only 8-9psi with a 3.25" pulley (SB 10-11psi), my SC system is working fine. No lag.
I was thinking though, you and Mike had a similar problem, an oil leak. Perhaps the belt is too slipery and needs to be degreased. I tried to degrease Mikes when I fixed the leak, but perhaps I didnt get it clean enough.
Besides only 8-9psi with a 3.25" pulley (SB 10-11psi), my SC system is working fine. No lag.
I was thinking though, you and Mike had a similar problem, an oil leak. Perhaps the belt is too slipery and needs to be degreased. I tried to degrease Mikes when I fixed the leak, but perhaps I didnt get it clean enough.
10-19-2001, 07:31 AM
#33
Originally posted by yo_its_ok
PowerDyne Blower which is what I use, HAS NO EXTERNAL OIL LINES NEEDED~!
1/2 the noise of a V2, and metal idler pulley.
STILLEN What What ~!
PowerDyne Blower which is what I use, HAS NO EXTERNAL OIL LINES NEEDED~!
1/2 the noise of a V2, and metal idler pulley.
STILLEN What What ~!
10-19-2001, 07:32 AM
#34
Originally posted by Y2KevSE
What's going on with Stillen SC's under boosting? I think that 90 degree bend from the blower is really hurting our boost.
What's going on with Stillen SC's under boosting? I think that 90 degree bend from the blower is really hurting our boost.
