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Catch Can vs Tune

Which first?

Catch Can vs Tune

Postby 03pewternblack [OP] » Jan 21 2021, 5:39am

If I plan to get a LewTune and do a catch can in the future, based on the opinions of those who know more than me, which should come first? The catch can obviously stops the bad stuff from getting into the block, or at least some of it. But the tune obviously gets rid of the dreaded AFM/DOD.

Which is worse for the truck overall?
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Re: Catch Can vs Tune

Postby FoxProDenali » Jan 21 2021, 10:17pm

A can is $35 and an i3 and a Lew tune is $350-ish. You won’t notice the former but you’ll love the latter. What’s your budget?

I don’t have an AFM engine but why are people buying trucks with it if it’s so bad? I don’t get it.
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Re: Catch Can vs Tune

Postby GBSierraSLE » Jan 21 2021, 10:20pm

I would do the catch can right away and drive in M5 until you get a tune. (AFM won't kick-in in M5 or lower.)
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Re: Catch Can vs Tune

Postby 03pewternblack [OP] » Jan 21 2021, 11:25pm

Well if I can get a catch cab for $35, then my both are within my budget at the same time. Everything I had been reading one was $600 (intune w/custom tune) and the other started around $200 (catch can).

I purchased the truck because I love GM and love the trucks and futures. I didn’t realize AFM was such an issue until I began reading about it. I also haven’t had a new enough pickup to experience AFM so never crossed my mind.
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Re: Catch Can vs Tune

Postby roorancher » Jan 21 2021, 11:32pm

Lew can fill you in on the tune. Email him @ [email protected]...
I believe the $35 catch can is the homemade variety....There are threads on the site that show the step by step. The one I have is an Elite Engineering E2, and it has many "bells and whistles" for north of $200....
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Re: Catch Can vs Tune

Postby 03pewternblack [OP] » Jan 21 2021, 11:40pm

Affirm. I’ve been in contact with Lew reference the tune. And the E2 is the can I was leaning towards. I looked into that homemade one, but was more confused after I read the thread than before I started.
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Re: Catch Can vs Tune

Postby FoxProDenali » Jan 22 2021, 3:54am

It’s mainly the DI engines that benefit most from a can. You’ll get a little oil in the summer and mostly water in the winter since the can acts as a condenser.

The basic cheap double baffle China-zon special with a dipstick is $30. A Moroso with a drain line is $150. Then it goes way up from there and what you get for $$$ more makes no sense to me but knock yourself out.

I suppose I was thinking you could get away with an older/used tuner for cheaper but maybe not for a newer truck. So that $350 is probably off (thought that’s what I put into mine). Either way, all you’re doing is recording data and uploading files...maybe scanning codes or adjusting wheel speed. The rest of the ‘tuner’ is quite useless cause Lew does the rest.
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Catch Can vs Tune

Postby mjrchabot » Jan 22 2021, 4:45am

FoxProDenali wrote:A can is $35 and an i3 and a Lew tune is $350-ish. You won’t notice the former but you’ll love the latter. What’s your budget?

I don’t have an AFM engine but why are people buying trucks with it if it’s so bad? I don’t get it.
I’ve said it before and I’ll say it again - we,
forum members, make up a small minority of actual owners. This is not limited to just truck forums, but everything.

There are millions of AFM/DFM engines on the road at this point. Quite frankly, it isn’t “so bad” as people say. Do I agree with the technology? No, I would trade AFM for an additional 0.1 MPG. But what is the ACTUAL failure rate of AFM lifters? We’ll never know, most of us are drawing conclusions based on a small minority who is more inclined to vent about an issue.

As for the question at hand... I don’t have a tune but my JLT 3.0 was the best money I’ve spent on my truck. I’ve collected lots of blow-by in the can and I’m very thankful I have it.

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Re: Catch Can vs Tune

Postby 03pewternblack [OP] » Jan 22 2021, 4:55am

@Fox

Are you or have you used one of the cheap-ina cans? Could you point me to one and post your review of it and how well it worked. For the tuner, yeah I'm going to have about $600 into a InTune I3 and a custom tune because its a 2018 truck. Unless I can find someone on this site that is selling a 2016+ InTune for cheaper...
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Re: Catch Can vs Tune

Postby SierraHarley » Jan 22 2021, 5:03am

Look around for a used catch can as well. I got my E2 catch can for $125 used from someone on here. If you can find one of the cheap cans used it might cost you $1.25 who knows?
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