12v exhaust manifold questions.

[Landmissile]

You know what... never mind. LOL If there's any question the 40 will fail emissions then I obviously need to get rid of it. I'm just going to make the drive and get the 35.

I got q 63/68/.83. It's laggy for sure, don't get the wrong. But for the way I use my truck it works just fine. I never drive in traffic, mostly on rural roads so the lag doesn't bother me.

Right on. I just need my rig to pass this test right now and I'll go from there. I will be driving in traffic quite a bit and I'm really more concerned about fuel economy over massive power. Not sure the lag will be a major issue for what I'm using the truck for but the emissions test is running my life right now. To be honest I'm nearing the waiver amount anyway. I might just push for that so I can get the truck registered.

Appreciate your feedback.

[RCCUMMINS89]

Come on now Fatty, don't go comparing your truck to a stock one.

I would still argue your truck wouldn't lose any high end with going to a T3, you would only gain low end.

[Landmissile]

I would still argue your truck wouldn't lose any high end with going to a T3, you would only gain low end.

Sounds like that's perfect for what I need the truck for. Being a trail rig with 12.5R20 tires on stock gearing, some low end gains would be welcome. It will never see heavy towing ever again. The big tires with the Getrag make it humane on the highway too. In fact 1st gear still feels a little lower then I would like. The rear tires often chirp a little starting from a stop. I'm considering a 43in military tire in the future for street and 42.5 Boggers for the trail. The Cummins seems to have bottomless power as it sits right now. Really don't need to drop coin for more power. I will go to some length to improve the fuel economy though.

[RCCUMMINS89]

An HX35 is what should of came on our trucks from the factory. They don't move a lot more air than the stock turbo, but they do move more. But the main thing is they spool a crap ton faster.

[Landmissile]

An HX35 is what should of came on our trucks from the factory. They don't move a lot more air than the stock turbo, but they do move more. But the main thing is they spool a crap ton faster.

Considering the low RPM red line that these engines have it would make sense to have a turbo that spools as quickly as mechanically possible. Not that I really know what I'm talking about, LOL but the physics make more sense in my head.

[fatty]

Come on now Fatty, don't go comparing your truck to a stock one.

I would still argue your truck wouldn't lose any high end with going to a T3, you would only gain low end.

Well I wasn't really trying to compare, just speaking in general. However, I switched to this turbo from a Dtech 62/65/12 and noticed an increase in top end power (above 2500). Lost on the bottom, but like I said, I don't care about lag.

Tell you what, send me one of those fancy pants 62 fmw that you're always bragging about and if I like it enough I'll buy it.

[RCCUMMINS89]

May be something to compare... it's not being used right now anyways. I would rather see the.80 on your set up though.

But the 65 vs 68 wheel is most likely the biggest difference. Not to mention the 62 wheel (I don't know what wheel they use, but there are a lot of options).

[Remps]

Definitely ditch that hx40. It's an 8 blade compressor, correct? If so it only flows about 4 lbs/min more than the hx35, at a PR of about 2.7 vs the 35's peak flow at a PR of 3 to 1. Truck will probably be slower and smokier with the 40.

[Landmissile]

Definitely ditch that hx40. It's an 8 blade compressor, correct? If so it only flows about 4 lbs/min more than the hx35, at a PR of about 2.7 vs the 35's peak flow at a PR of 3 to 1. Truck will probably be slower and smokier with the 40.

Not sure about the blade count. No doubt the 35 is the better turbo for what I need. I should have it this week.