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ThaCuda ThaCuda is offline
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Default 01-04-2016, 01:53 PM

Quote:
Originally Posted by Blaizon
My only beef with going single turbo has been O2 replacement frequency. Once we get that ironed out I'll be totally satisfied. Besides that one complaint, it has been the best mod I've done to the car.
Care to elaborate? Is it placement or temperature issue?


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natedog7700 natedog7700 is offline
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Default 01-04-2016, 01:59 PM

I like my RB's but im at 4,000 miles and they are starting to smoke on start up. Im not positive its the turbo's, so im going to try replacing a few other things first. I had the goal for 600 bhp and im right around there. No ST turbo lag, very daily driveable, and nothing that shouts "race car" when im driving around. My second trans is already slipping with a full load, so there's no way in hell i'd consider a ST unless i do a MT swap.


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Blaizon Blaizon is offline
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Default 01-04-2016, 02:02 PM

Quote:
Originally Posted by ThaCuda
Care to elaborate? Is it placement or temperature issue?
It's both in the case of my FFTEC top mount kit. The oem o2 sensors are not engineered to handle accurately the conditions *high temps/read ability* they are seeing on these aftermarket kits. There has been quite a bit of work to find a pnp solution, and I believe it's nearing completion.

http://bimmerboost.com/showthread.ph...ns-and-testing


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Last edited by Blaizon; 01-04-2016 at 02:12 PM..
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Bme30 Bme30 is offline
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Default 01-04-2016, 09:58 PM

I'm single turbo fftec 900 kit (6466). The car is a blast to drive! I did kill O2 almost right after the swap, but in the past year of hard driving the car has been flawless! 32psi map is all the car sees...running full e85 on motiv port injection. 15mpg lol

my buddy has the same build here in FL. He has put nearly 25k on his kit this year, daily driven on 32 psi and the car has been flawless!

mine: https://www.youtube.com/watch?v=JpRCvPtx-ZI
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Default 01-04-2016, 09:59 PM

MY BUDDYS!

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idratherbesurfing idratherbesurfing is offline
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Default 01-05-2016, 04:36 AM

Did he go back to the future? Lmao. Pulls like a monster, i want to see single turbo vs upgraded twins. Same power level and good drivers. Thats going to be a nice fight on here haha
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Tzu Tzu is offline
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Default 01-05-2016, 05:06 AM

With current options, I'd be a bit torn for a small single vs uprgaded stock frames if reaching for 600ish HP. Premature O2 sensor deaths still seem to be a big issue with singles and the risk of premature death of stock frames would always nag me. Just my .02.
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camberadam camberadam is offline
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Default 01-05-2016, 09:05 AM

O2 sensors are cheaper & easier to install yourself... Just food for thought lol.
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135pats 135pats is offline
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Default 01-05-2016, 09:06 AM

I can't imagine going back to stock frames; though I also haven't driven any of these super aggressive iterations either.

Challenge with singles is tuning. Requires a lot more work to keep the car and DME happy; stock frames you can bolt up and pretty much go about your business after install (obviously a refined tune would be needed from there).

The quality of hardware isn't at all comparable. IMO.
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Default 01-05-2016, 10:12 AM

Quote:
Originally Posted by idratherbesurfing
Did he go back to the future? Lmao. Pulls like a monster, i want to see single turbo vs upgraded twins. Same power level and good drivers. Thats going to be a nice fight on here haha
You've seen single vs twins at the track. You know my setup and I trapped 125mph at 25psi on e85. That guy Tom with the blue single turbo trapped 123mph at 20-22psi on PUMP GAS with a simple JB4 map and an untouched backend flash.

If I had to do it all over again I would have gone single for sure.

Quote:
Originally Posted by 135pats
I can't imagine going back to stock frames; though I also haven't driven any of these super aggressive iterations either.

Challenge with singles is tuning. Requires a lot more work to keep the car and DME happy; stock frames you can bolt up and pretty much go about your business after install (obviously a refined tune would be needed from there).

The quality of hardware isn't at all comparable. IMO.
I think tuning for single turbos is getting easier and easier. Eventually, everything will be figured out.


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Default 01-05-2016, 10:13 AM

Quote:
Originally Posted by natedog7700
I like my RB's but im at 4,000 miles and they are starting to smoke on start up. Im not positive its the turbo's, so im going to try replacing a few other things first. I had the goal for 600 bhp and im right around there. No ST turbo lag, very daily driveable, and nothing that shouts "race car" when im driving around. My second trans is already slipping with a full load, so there's no way in hell i'd consider a ST unless i do a MT swap.
Don't blame the RB's yet. If your still spooling the same, and hitting your target boost, it's most likely not the turbos.

I'm at about 25,000 miles on my RB's, 25+psi everyday, constantly beat on it - no issues.


----------------------------------------------------
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Torgus Torgus is offline
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Default 01-05-2016, 10:25 AM

Quote:
Originally Posted by Tzu
With current options, I'd be a bit torn for a small single vs uprgaded stock frames if reaching for 600ish HP. Premature O2 sensor deaths still seem to be a big issue with singles and the risk of premature death of stock frames would always nag me. Just my .02.
02 sensors are cheap, turbos are not. Also I hear there will be a fix soon for the 02s thanks to a certain somebody


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Default 01-05-2016, 10:32 AM

Quote:
Originally Posted by jyamona
I'd like to get some overlays once my setup and yours are fully dialed in!
I would love to as well to see how much spool you can pick up over the best Motiv 750 dyno I have seen to date which was Pobudz. Overlaid with our new 2+ dynos, its not even close. Stock frames make a ton more power down low, are easily surpassed in the mid range, and then basically hold close the same power up top. The graph I overlaid is 32 psi down 28.5. Podudz graph is 38 psi down to 31, and 33 psi down to 31. Which explains why they are surpassed in the mid range. If we ran the same boost curve (if its possible), I have no doubt the stock frames would make more power everywhere, and come close matching top end power.
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Default 01-05-2016, 10:40 AM

In case anyone wants to see logs grabs. Dyno spool in 4th for the run above, then street spool in 4th, a couple days later.
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Default 01-05-2016, 12:05 PM

you are luckiest person I have ever seen, seriously! i have broke 2 sets within 500 miles each (((, definitely will go ST next.

Quote:
Originally Posted by Fmonteiro444
Don't blame the RB's yet. If your still spooling the same, and hitting your target boost, it's most likely not the turbos.

I'm at about 25,000 miles on my RB's, 25+psi everyday, constantly beat on it - no issues.


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jyamona jyamona is offline
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Default 01-05-2016, 12:24 PM

Quote:
Originally Posted by VargasTurboTech
In case anyone wants to see logs grabs. Dyno spool in 4th for the run above, then street spool in 4th, a couple days later.
Nice! It will be awhile until we can compare true apples to apples, but I'll post results as they come anyway for some fun comparisons. I have the 3.46 w/ my 6MT which hurts the spool dept, as well as my current testing is 93oct which also is at a disadvantage to E85. Go away, 11* weather and snow


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Default 01-05-2016, 02:26 PM

Quote:
Originally Posted by jyamona
Nice! It will be awhile until we can compare true apples to apples, but I'll post results as they come anyway for some fun comparisons. I have the 3.46 w/ my 6MT which hurts the spool dept, as well as my current testing is 93oct which also is at a disadvantage to E85. Go away, 11* weather and snow
Looking forward to it! If anyone can get the singles spooling faster its you! The main reason we have the spool we do is because you helped me with the Vanos!


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Default 01-05-2016, 03:39 PM

Quote:
Originally Posted by jyamona
Nice! It will be awhile until we can compare true apples to apples, but I'll post results as they come anyway for some fun comparisons.
Yesssss, we love data!!!


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Fmonteiro444 Fmonteiro444 is offline
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Default 01-06-2016, 10:42 AM

Quote:
Originally Posted by VargasTurboTech
Looking forward to it! If anyone can get the singles spooling faster its you! The main reason we have the spool we do is because you helped me with the Vanos!
Didn't PTF get a single to hit 25psi by 3500rpm?


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jyamona jyamona is offline
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Default 01-06-2016, 12:39 PM

Quote:
Originally Posted by Fmonteiro444
Didn't PTF get a single to hit 25psi by 3500rpm?
Yes they did, it was a PTE 6266, and it was a 3rd gear pull on the street. Dzenno based that VANOS very closely off what he saw I did for Tony.

Anyway, that's a good data point to have, as my turbo is basically the same size


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Default 01-06-2016, 01:00 PM

That's what I love about the twins, the massive low torque.
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Tony@VargasTurboTech Tony@VargasTurboTech is offline
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Default 01-06-2016, 02:00 PM

Quote:
Originally Posted by jyamona
Yes they did, it was a PTE 6266, and it was a 3rd gear pull on the street. Dzenno based that VANOS very closely off what he saw I did for Tony.

Anyway, that's a good data point to have, as my turbo is basically the same size
My understanding was he completely changed the Vanos as he tried what we ran, and it didn't work as hoped on his personal car, so he went with his own settings, and they worked out well. I have seen both Jake, and D so some amazing things


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Default 01-06-2016, 06:45 PM

Quote:
Originally Posted by jyamona
Nice! It will be awhile until we can compare true apples to apples, but I'll post results as they come anyway for some fun comparisons. I have the 3.46 w/ my 6MT which hurts the spool dept, as well as my current testing is 93oct which also is at a disadvantage to E85. Go away, 11* weather and snow
I posted apples to apples (even same car) in post 22 above. 20psi by 3300 rpm on the street, without tuning Vanos for spool.

It will be nice to see what results you can get.


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zeeth2800 zeeth2800 is offline
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Default 01-06-2016, 09:24 PM

Quote:
Originally Posted by jyamona
Yes they did, it was a PTE 6266, and it was a 3rd gear pull on the street. Dzenno based that VANOS very closely off what he saw I did for Tony.

Anyway, that's a good data point to have, as my turbo is basically the same size
thats still nuts!
My 6262 won't spool that quickly :/

I'd do anything for quicker spool... except go back to twins


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jyamona jyamona is offline
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Default 01-07-2016, 06:42 AM

Quote:
Originally Posted by The Leopard
I posted apples to apples (even same car) in post 22 above. 20psi by 3300 rpm on the street, without tuning Vanos for spool.

It will be nice to see what results you can get.
What final drive, gear, fuel?


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