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Go Back   Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 07.5+ LMM Forums > 07.5+ LMM Performance Parts Discussion

07.5+ LMM Performance Parts Discussion Discussion of Performance Parts For the 07 and up LMM Duramax Trucks No Advertising

 

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Old 11-06-2009, 06:36 PM   eBay Motors  #11 (permalink)
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first and imo biggest problem is the fact that the second turbo receives its oil from the first turbo as far as i can tell. that means that the heat sink (oil) from first turbo enters the second turbo super heated. that is a very bad idea imo.
You mean the feed off the banjo fitting? It is the supply to both turbo's from that point so they both get the same temp for oil or maybe cooler for the large turbo, the feed to the large turbo isn't the return off of the stock turbo. Also, you can use a feed off the block, its only about $10 for the extra fitting from jegs.

Sorry to derail but I'd also like to hear what else you don't like about them, just curious is all.
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Old 11-06-2009, 06:38 PM   eBay Motors  #12 (permalink)
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well that makes me feel better about that. no offence to HTT or anyone else but i feel the big companies with more R&D money can make a longer lasting part.



well i don't want to step on anyone’s toes but i have been doing custom turbo and supercharger installs for the past 5 years and IMHO none of the TT kits i have seen were worth anything.

first and imo biggest problem is the fact that the second turbo receives its oil from the first turbo as far as i can tell. that means that the heat sink (oil) from first turbo enters the second turbo super heated. that is a very bad idea imo.
Are you saying Borg Warner isnt a big company Buck?
Most OTR trucks run Garretts or BWs. HTT, BD and others use the BW S300 as the basis for their chargers. Garretts are kick ass chargers, but if something messes up, its around 1500 or so for a rebuild. With the BWs, you can do a rebuild for around 3-500.

As for the oil, I never really looked at that aspect of it.
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Old 11-07-2009, 10:07 AM   eBay Motors  #13 (permalink)
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Originally Posted by Dmax15 View Post
You mean the feed off the banjo fitting? It is the supply to both turbo's from that point so they both get the same temp for oil or maybe cooler for the large turbo, the feed to the large turbo isn't the return off of the stock turbo. Also, you can use a feed off the block, its only about $10 for the extra fitting from jegs.

Sorry to derail but I'd also like to hear what else you don't like about them, just curious is all.
well i only ever breezed over the install instructions online but now that you explained i understand what’s going on with the oil.

as far as what’s wrong with the kits...nothing is wrong with them i just don't feel that price is justified. i only like 2 looks for my stuff factory or race. IMHO the kits i have seen in the mags and online don't look like either of those.


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Originally Posted by DMAXchris View Post
Are you saying Borg Warner isnt a big company Buck?
Most OTR trucks run Garretts or BWs. HTT, BD and others use the BW S300 as the basis for their chargers. Garretts are kick ass chargers, but if something messes up, its around 1500 or so for a rebuild. With the BWs, you can do a rebuild for around 3-500.

As for the oil, I never really looked at that aspect of it.
no no not all they are great... BW or garrett are what i would most likely run because of how large the companies are and how long of a track record they have.
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Old 11-07-2009, 10:18 AM   eBay Motors  #14 (permalink)
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well i only ever breezed over the install instructions online but now that you explained i understand what’s going on with the oil.

as far as what’s wrong with the kits...nothing is wrong with them i just don't feel that price is justified. i only like 2 looks for my stuff factory or race. IMHO the kits i have seen in the mags and online don't look like either of those.




no no not all they are great... BW or garrett are what i would most likely run because of how large the companies are and how long of a track record they have.
I guess it just comes down to a balance of looks and performance then. My decision for twins had nothing to do with looks but at the same time its not bad looking at all in my opinion. Hopefully whichever way you go works out well for you.
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Old 11-07-2009, 04:34 PM   eBay Motors  #15 (permalink)
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i understand completely and i see by your sig that you made your own...why is that?
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Suspension Cognito UCA kit with Bilsteins all around from Nick at Nor-Cal Truck
Drivetrain LMM Duramax, Allsion 1000 Transmssion
Performance Mods EFI Live and DSP 5 By MMLMM, RBP downpipe back exhaust (no CAT or DPF), TransGo Jr, Mag Hytec transmssion and rear end covers, PPE Air Box Mod, Resonator Blocked, Auto Meter GS Boost, EGT, and Transmission gauges, Auto Meter triple pillar with speaker cutout. all from Tyler at Meyer Performance & Fabrication, LLC
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Old 11-08-2009, 06:15 AM   eBay Motors  #16 (permalink)
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i understand completely and i see by your sig that you made your own...why is that?
Price was the main thing for me, I ended up spending less than I could find for a used single kit. Everything about what I've heard they run like performance wise is true also.

You wont make a bad choice either way but IMO if you are on the fence about twins I say go for it, the gains are awesome!
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2002 GMC LB7
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