Supercharging my car.... are all my bases covered?

[BIGW0RM]

Originally Posted by wrecklessfool

I had a similar issue in my turbo E46. Turned out that replacing the driveshaft guibo cured 99% of it even though upon visual inspection the guibo seemed fine. How many miles are on your car?

18666 when I added the SC and 19400ish now. Never had any pulsating before.

[wrecklessfool]

Originally Posted by ILSMKU

18666 when I added the SC and 19400ish now. Never had any pulsating before.

Me either until I added the extra power to the driveline. I also had significantly more miles so I would think at under 20K your guibo is probably not the issue. Mine would only do it under boost, but if you're saying 4K RPMs then that may not be the answer since boost doesn't come on until a little later with the centri if I'm not mistaken.

[BIGW0RM]

Originally Posted by wrecklessfool

Me either until I added the extra power to the driveline. I also had significantly more miles so I would think at under 20K your guibo is probably not the issue. Mine would only do it under boost, but if you're saying 4K RPMs then that may not be the answer since boost doesn't come on until a little later with the centri if I'm not mistaken.

Basically, whenever the boost comes on, and Im pushing forward under load, the car pulsates. I notice it the most 5-7K. But I have felt it as low as 4K and up to 7500rpm. Ive since stopped driving the car.

[wrecklessfool]

Originally Posted by ILSMKU

Basically, whenever the boost comes on, and Im pushing forward under load, the car pulsates. I notice it the most 5-7K. But I have felt it as low as 4K and up to 7500rpm. Ive since stopped driving the car.

What are your A/F ratios reading under boost and WOT? It's possible that some of the newly installed hardware is contacting the vehicle somewhere giving you vibes. Since your rod bearings were just replaced I imagine a large amount of components were removed from the front end. Maybe see if you can do a visual inspection from under the subframe looking up?

[BrewRifle]

Have you checked all of your lines for a vacuum leak?

[BIGW0RM]

Originally Posted by wrecklessfool

What are your A/F ratios reading under boost and WOT? It's possible that some of the newly installed hardware is contacting the vehicle somewhere giving you vibes. Since your rod bearings were just replaced I imagine a large amount of components were removed from the front end. Maybe see if you can do a visual inspection from under the subframe looking up?

The plan is for EAS to take a 2nd look. Just waiting on when to tell me when they can. Im just asking questions to educate myself on what others with TPs have experience.

[W Cole]

Originally Posted by ILSMKU

The plan is for EAS to take a 2nd look. Just waiting on when to tell me when they can. Im just asking questions to educate myself on what others with TPs have experience.

I have a similar issue in 2nd on my 625 kit. I think its a combination of wheel hop and since the Xpipe is not supported as well as oem with my test pipes. Weird you have this in the higher gears though.

Eventually I plan on doing engine/tranny/subframe mounts and at the same time making sure the Xpipe isn't rubbing on anything.

[BIGW0RM]

Originally Posted by BrewRifle

Have you checked all of your lines for a vacuum leak?

No, but I will ask eAS too.

[BIGW0RM]

Originally Posted by W Cole

I have a similar issue in 2nd on my 625 kit. I think its a combination of wheel hop and since the Xpipe is not supported as well as oem with my test pipes. Weird you have this in the higher gears though.

Eventually I plan on doing engine/tranny/subframe mounts and at the same time making sure the Xpipe isn't rubbing on anything.

Wait? Your car pulsates with the 625 kit?

Im not wheel hopping at all. Im cruising 50-60 in 4th at 4K rpm and mashing it to the floor. As It goes and makes boost, its pulsating.

What do you mean xpipe not supported? Whats that about?

[///Mvy]

Originally Posted by BrewRifle

Have you checked all of your lines for a vacuum leak?

+1 on my S/C M5 I had an issue with a torn vacuum hose that was effectively causing my BOV to flutter and create a similar effect. It shouldn't be hard for them to check your lines for leaks.

[squartus]

Originally Posted by ILSMKU

No, my ESS-550 kit pulsates from 4K and up in 4th, 5th (havent tried 6th) and its driving me nuts. I was suggested that perhaps my MS test pipes, or megan muffler or combination of them is my root cause. So Im just trying to educate myself on what others experience with their kits and test pipes.

Oh, no nothing like that at all from my SC. Don't really see how your exhaust could be the cause, when was the last time you changed your sparkplugs? Need to change about every 15k with a supercharger, around 35-40k if your stock.
When I had my SC installed I forgot to change my plugs, until I changed them out power would kick in and out at high RPM. Purred like a kitten after changing. If not plugs could be one of the coilpacks, or vacuum leak would do it as well "some installers don't clamp down all the hoses in the proper way"

[BIGW0RM]

Originally Posted by squartus

Oh, no nothing like that at all from my SC. Don't really see how your exhaust could be the cause, when was the last time you changed your sparkplugs? Need to change about every 15k with a supercharger, around 35-40k if your stock.
When I had my SC installed I forgot to change my plugs, until I changed them out power would kick in and out at high RPM. Purred like a kitten after changing. If not plugs could be one of the coilpacks, or vacuum leak would do it as well "some installers don't clamp down all the hoses in the proper way"

Plugs and oil changed when sc was installed. Did 522whp. Drive it home and noticed it was pulsating. They told me let it adapt. 3-4 tanks later I'm still seeing it.

[R_lara]

Originally Posted by magikman2000

Would this kit do the trick you think?
http://www.ecstuning.com/BMW-E90-M3-...ial/ES2651068/

Curios to know 2

[W Cole]

Originally Posted by ILSMKU

Wait? Your car pulsates with the 625 kit?

Im not wheel hopping at all. Im cruising 50-60 in 4th at 4K rpm and mashing it to the floor. As It goes and makes boost, its pulsating.

What do you mean xpipe not supported? Whats that about?

I don't think we have the same issue. Mine is a vibration.

The test pipes remove the front Xpipe mount which I think could possibly be causing my problem.

[BIGW0RM]

Originally Posted by W Cole

I don't think we have the same issue. Mine is a vibration.

The test pipes remove the front Xpipe mount which I think could possibly be causing my problem.

No, I know what you are talking about its not that.

[CrucialScott]

Originally Posted by ILSMKU

Plugs and oil changed when sc was installed. Did 522whp. Drive it home and noticed it was pulsating. They told me let it adapt. 3-4 tanks later I'm still seeing it.

I had a turbo'ed car that used to pulsate on hard acceleration when planted in 2/3rd gear.

It started once i fitted an electronic boost controller, i'm not sure how the boost is handled on your supercharger setup but what i had to do was configure the 'gain' so that they electronic valve didn't open and shut so quickly. Less gain meant that the boost didn't come on as hard but it solved my pulsating issue....

No idea if this is applicable to your circumstances

[///Mvy]

Originally Posted by CrucialScott

I had a turbo'ed car that used to pulsate on hard acceleration when planted in 2/3rd gear.

It started once i fitted an electronic boost controller, i'm not sure how the boost is handled on your supercharger setup but what i had to do was configure the 'gain' so that they electronic valve didn't open and shut so quickly. Less gain meant that the boost didn't come on as hard but it solved my pulsating issue....

No idea if this is applicable to your circumstances

I would assume it's controlled by the BOV/Recirc valve. Which would be controlled by the vacuum system. Are you holding constant boost when it's vibrating?

Another thing to check would be the center support bearing.

[W Cole]

Originally Posted by ILSMKU

No, I know what you are talking about its not that.

Hard to diagnose over the internet. Maybe a video would help.

I would say its an issue with the BOV but that wouldn't be limited to certain gears. I can't figure that one out.

[BIGW0RM]

Well, mines going back to EAS Thursday. I' pretty much parked the car since my last post but my M5 broke down on me in Lake Havasue of all places! I had to drive my M3 yesterday and today until I got my m5 back this afternoon. So until I can limp it to them, it's parked again.

I'm so over my cars right now.

[BrewRifle]

Originally Posted by ILSMKU

Well, mines going back to EAS Thursday. I' pretty much parked the car since my last post but my M5 broke down on me in Lake Havasue of all places! I had to drive my M3 yesterday and today until I got my m5 back this afternoon. So until I can limp it to them, it's parked again.

I'm so over my cars right now.

What happened to the M5?

[imstimpy]

No pulsing on my VT2-600 kit. If you have logging you could look at airflow, timing, and possibly fueling (though fueling moves slowly). Unfortunately for us, the Bavtech documentation is horrendous so I'm having to go through monitor by monitor to determine what it does.

[BIGW0RM]

Originally Posted by BrewRifle

What happened to the M5?

I had an injector gone bad! I had just had the car serviced at the dealer with for oil and they told me it was time for new spark plugs, wipers and the recall. I had it all done and car drove no different than it did before I took it in. Couple days pass and wife and I go to Lake Havasu (4hr one way) to attend to our boat for the coming season and 1/2 there I notice the CEL is on! No errors in the idrive. I stop, turn it off, back on and CEL is still there.

I now notice its running rough. We have no choice being in the middle of the desert but to proceed to town. I get to town and find on euro car shop and the guy comes out scans my car and tells me its saying it was running lean and some other errors about fuel or whatever. He tells me its probably an injector going bad. Tells me the closest dealer is Vegas 300 miles away, so he clears the codes and I limp it home to my dealer. They replaced the part(s) and Im all good now, but dam.