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NNBS Twin Turbo Build

Old 04-15-2016, 12:04 AM
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Any progress on this build? Curious what the single Walbro 450 made for ya! I got one to put in my nnbs just curious what we can push out of them?
Old 05-15-2016, 10:05 PM
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Sorry for no updates ended up buying a house and have been slow on progress with the truck. Here is the latest everything is completed just have to weld the passenger downpipe and i will be done for the first start up at the end of the month. This is the completed drivers side the passenger side is off until i complete welding.







Old 05-15-2016, 10:59 PM
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in for the rest of the build. looks great man thanks for sharing.
Old 05-27-2016, 10:00 PM
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Its all done!!!!

Was able to do a first startup today and seemed to fine for the first 15min until it went into REP mode. Will have to fine tune from here. Anybody have any problems with being in a custom 2 bar speed density tune and going into REP? Was just curious if its trying to correlate the map and tps to the maf still that is no longer there? Any feedback would be good

Will post vid soon of startup





Last edited by blackedoutchevy22; 08-29-2016 at 02:49 PM.
Old 05-27-2016, 10:03 PM
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If the MAF is disabled correctly in the tune, it shouldn't enter REP for a maf related reason.
Old 05-27-2016, 10:51 PM
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Originally Posted by FFDP
If the MAF is disabled correctly in the tune, it shouldn't enter REP for a maf related reason.
Im doing the tuning and im fairly new to the SD tuning. So i may have missed some of the tables that needed to be disabled. Im not even sure if it entered REP bc of the maf will have to look at tune file tommorow. But i did find two tables under the engine diagnostics tab that the airflow delta and map delta were both set to stock so i maxxed them out not sure if that will help yet.
Old 05-28-2016, 11:16 AM
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Interested in seeing how these turbos spool on a 5.3. Might run change up my S366 for a pair of S360's on my 69 c-10, just for the cool factor of twins.
Old 10-19-2016, 12:56 AM
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Any updates?
Old 09-02-2018, 03:17 PM
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I know this is 2 years old but I’m in the process of going twins on my 08 Silverado 5.3 with flipped truck manifolds. How did your kite the driver and passenger downpipes? Where is there enough room for twin 3”? Any info or pics would help great if you can get back to me. Thanks
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