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Default New docrace single kit low boost - 05-23-2018, 12:31 AM

Hello everyone, this last weekend my buddy and I installed a beautiful ball bearing 6266 in my 335 and everything went smoothly besides a rotted out coolant hose and I forgot to order the mac solenoid. She runs great, I have it on map 1 for wastgate pressure only but I'm having some issues. I have the green and white springs in the gates for 11.6 psi but I was only making 4ish and I have a really strong exhuast smell in the cabin. I was thinking I have an exhuast leak on the manifold somewhere so I unplugged the line off the turbo and did a pull to see if boost would shoot up and it didn't. it just sat around 4psi. I don't hear a leak anywhere, am I on the right track looking for one?
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Default 05-23-2018, 11:39 AM

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Originally Posted by laptop4079
Hello everyone, this last weekend my buddy and I installed a beautiful ball bearing 6266 in my 335 and everything went smoothly besides a rotted out coolant hose and I forgot to order the mac solenoid. She runs great, I have it on map 1 for wastgate pressure only but I'm having some issues. I have the green and white springs in the gates for 11.6 psi but I was only making 4ish and I have a really strong exhuast smell in the cabin. I was thinking I have an exhuast leak on the manifold somewhere so I unplugged the line off the turbo and did a pull to see if boost would shoot up and it didn't. it just sat around 4psi. I don't hear a leak anywhere, am I on the right track looking for one?
Make sure you plugged the other openings on the wastegate.


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Default 05-23-2018, 12:03 PM

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Originally Posted by Payam @ BMS
Make sure you plugged the other openings on the wastegate.
I followed the paper that came with the wastgate instead of how you should plumb it with the mac solenoid. The way it's plumbed now is vac/boost is going to the bottom chamber of the wastgate and the top is venting to atmosphere everything else is plugged. But should that matter since I've tested it with the lines disconnected?
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Default 05-24-2018, 10:17 AM

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Originally Posted by laptop4079
I followed the paper that came with the wastgate instead of how you should plumb it with the mac solenoid. The way it's plumbed now is vac/boost is going to the bottom chamber of the wastgate and the top is venting to atmosphere everything else is plugged. But should that matter since I've tested it with the lines disconnected?
I understand, there are extra ports on the wastegate that need to be plugged up if they are not used.


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Default 05-24-2018, 10:50 AM

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Originally Posted by Payam @ BMS
I understand, there are extra ports on the wastegate that need to be plugged up if they are not used.
The only holes that don't have anything in them are the water ports. I have the bottom chambers tied together and the top hole vented to atmosphere through barbs for the mac solenoid when it gets here. Everything else is plugged.
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Default 05-25-2018, 12:53 AM

Okay got home from work tonight pulled the car in the shop and dropped the subframe again in what I would consider impressive time compared to my first time.

I can't see any evidence of an exhuast leak. I didn't start it because I don't want the engine to crush me all by myself in the shop so I'll wait until tomorrow to do that. Another thing I should mention the reason I decided to pull the trigger on the single kit was my twins decided to blow and make 0 boost. When I removed them I discovered little shaft play so I don't think they actually blew up.

When I examined my old stock exhuast they looked trashed (see picture) so I believed they made a restriction that prevented the twins from spinning up. Is it possible that chunks broke off and are now sitting in front of the secondary's also making a restriction preventing the turbo from spinning up?
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Default 05-25-2018, 10:24 AM

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Originally Posted by laptop4079
The only holes that don't have anything in them are the water ports. I have the bottom chambers tied together and the top hole vented to atmosphere through barbs for the mac solenoid when it gets here. Everything else is plugged.
Try and take some pics if you can I guess. I don't think the secondary cats would be choking the turbo.


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Default 05-26-2018, 07:36 PM

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Originally Posted by Payam @ BMS
Try and take some pics if you can I guess. I don't think the secondary cats would be choking the turbo.
Well just got done gutting them and that was definitely the issue. The boost hit so quick it broke the tires loose in 3rd. I have to pull some logs and post them up because I'm pretty sure I'm overboosting but it's dark and a bit damp tonight.
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Default 05-29-2018, 01:36 PM

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Originally Posted by laptop4079
Well just got done gutting them and that was definitely the issue. The boost hit so quick it broke the tires loose in 3rd. I have to pull some logs and post them up because I'm pretty sure I'm overboosting but it's dark and a bit damp tonight.
Wow that is crazy, first time ever seeing or hearing something like that with secondaries!

Post up a log on map 2 so we can look over once it dries up.


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Default 05-31-2018, 07:51 PM

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Originally Posted by Payam @ BMS
Wow that is crazy, first time ever seeing or hearing something like that with secondaries!

Post up a log on map 2 so we can look over once it dries up.
I was going to do maps 1-3 but I'm having hell of a time keeping my intercooler piping together. For some reason I'm overboosting in map 1 and underboosting in map 2
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File Type: csv map1.csv (14.9 KB, 10 views)
File Type: csv map2.csv (13.8 KB, 10 views)
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Default 05-31-2018, 09:54 PM

I actually see map 1 boost around 15 psi and map 2 hitting target 17 lol. They both look really good actually. Just adjust the value for 6 cylinder logging so we can see the timing in all cylinders.

Where is the connection you're having issues with? What clamps are you using, maybe I can guide to a better solution?
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Default 05-31-2018, 10:11 PM

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Originally Posted by Payam @ BMS
I actually see map 1 boost around 15 psi and map 2 hitting target 17 lol. They both look really good actually. Just adjust the value for 6 cylinder logging so we can see the timing in all cylinders.

Where is the connection you're having issues with? What clamps are you using, maybe I can guide to a better solution?
I'm using the green and white springs in both of the gates so it should be around 11.6 shouldn't it?

Yeaaah about that.... I'm on the stock intercooler still LOL I had to cut the breadroll off the doc aluminum pipe from the turbo to get it to fit. I'm looking at replacing it with the vrsf race intercooler and getting a new pipe unless you have a better alternative that doesn't break the bank
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Default 06-01-2018, 07:07 AM

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Originally Posted by laptop4079
I'm using the green and white springs in both of the gates so it should be around 11.6 shouldn't it?

Yeaaah about that.... I'm on the stock intercooler still LOL I had to cut the breadroll off the doc aluminum pipe from the turbo to get it to fit. I'm looking at replacing it with the vrsf race intercooler and getting a new pipe unless you have a better alternative that doesn't break the bank
The Doc Kit/TiAL spring combo always overboosts a little. I was seeing around 16psi with the same springs at wastegate pressure. It's okay, as long as you don't want to turn the boost down further. I swapped in 8.7psi springs and am getting ~12psi now at gate pressure. I still have no problem turning it up to 30psi though.

I have the 7.5" VRSF Race intercooler and its great! I'm sure the Phoenix intercooler will work good as well.

PS: Your low pressure fuel pump takes a dive as you wind out the RPMs.


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Default 06-01-2018, 09:33 AM

Quote:
Originally Posted by laptop4079
I'm using the green and white springs in both of the gates so it should be around 11.6 shouldn't it?

Yeaaah about that.... I'm on the stock intercooler still LOL I had to cut the breadroll off the doc aluminum pipe from the turbo to get it to fit. I'm looking at replacing it with the vrsf race intercooler and getting a new pipe unless you have a better alternative that doesn't break the bank
Yea, that's why I usually recommend for the single kits but some do have more creep than others. As Jake said he has better boost control with the 9 psi spring so I'd go with that one on your kit.

For the intercooler I'd recommend our Phoenix Race intercooler for E chassis. I'm using that on my 750whp 335i and IAT don't even move on couple gear pulls.

http://www.burgertuning.com/BMW_135_...tercooler.html


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

Last edited by Payam @ BMS; 06-01-2018 at 10:35 AM..
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Default 06-01-2018, 03:16 PM

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Originally Posted by Payam @ BMS
Yea, that's why I usually recommend for the single kits but some do have more creep than others. As Jake said he has better boost control with the 9 psi spring so I'd go with that one on your kit.

For the intercooler I'd recommend our Phoenix Race intercooler for E chassis. I'm using that on my 750whp 335i and IAT don't even move on couple gear pulls.

http://www.burgertuning.com/BMW_135_...tercooler.html
After seeing the logs do you think switching the springs is necessary? I can't get the springs out without dropping the subframe and I do not want to do that again anytime soon.

And I didn't even see the Phoenix IC during my research that sounds pretty good, top contender so far.
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Default 06-01-2018, 08:22 PM

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After seeing the logs do you think switching the springs is necessary? I can't get the springs out without dropping the subframe and I do not want to do that again anytime soon.

And I didn't even see the Phoenix IC during my research that sounds pretty good, top contender so far.
It's completely up to you / preference- I personally run the 14.5lb springs on my kit.

CAnt go wrong w. the phoenix fmic- thinking about switching to that myself for the upcoming 1/2 mile event



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Default 06-02-2018, 10:51 AM

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Originally Posted by laptop4079
After seeing the logs do you think switching the springs is necessary? I can't get the springs out without dropping the subframe and I do not want to do that again anytime soon.

And I didn't even see the Phoenix IC during my research that sounds pretty good, top contender so far.
It's up to you and if you want to run lower boost for a DD that's the only way. Basically your WG boost is your limit for LPFP too.


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