Hewitt Tech SAIC

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:popcorn:

Love these threads. Im a SAIS guy, though. Just like Im an ASS man (Auto Stop/Start) on another vehicle I own.

To each their own. YMMV. And all that jazz.
 
:popcorn:

Love these threads. Im a SAIS guy, though. Just like Im an ASS man (Auto Stop/Start) on another vehicle I own.

To each their own. YMMV. And all that jazz.
I also own a hybrid. And a bunch of bicycles :).
 
I blocked it off pre-emptively to address a failure as I was pulling off the intake anyway to replace the starter. Glad I did it too as the starter was an absolute bear to replace without bending those SAIS tubes out of the way. Had I not done the starter I would have bypassed it.

Driving any V8 SUV or truck, particularly a 100-series or GX470, is a not a good choice environmentally. The vehicles are large emitters of CO2 and have much worse tailpipe emissions than just about any modern vehicle. While deleting a SAIS may increase the emissions small amounts during a cold starts, but the vehicle as a whole is bad enough for the environment it's not even a drop in the bucket, and would have the same emissions profile as a pre-VVTI 2UZ anyway.

By that line of logic, is it immoral to drive a pre-VVTI 100 series when a VVTI/SAIS version is cleaner? Or is it immoral to drive say an 80 series or a 1980s mini-truck that has even worse emissions than a vehicle from the aughts, with our without a SAIS bypass? All are perfectly legal in the eyes of the USEPA and state governments, despite the higher emissions. It seems like a slippery slope to try to find any kind of a moral high-ground for anyone who owns a ICE vehicle, especially for something as trivial as bypassing a failure prone system that only operates for a few minutes during cold starts.

At the end of the day I'm fortunate to live in an area with good air quality, where the tiny emissions difference from a SAIS bypass has no effects on my health or the health of other people. We don't have enforcement for those reuglations here because we don't need them for our health. It's a benefit of living here and a detraction from living in a large metro near the mountains (Denver, LA) that traps smog/emissions, hurting people's health and requiring additional regulations.
So I understand. You block-off the SAI as PM, to prevent a possible future failure. A while you're in there thing! Nothing was wrong with it at the time.

Block-off kits, ~$450. The filter mod, is less than $100 in parts. So wouldn't think, it was a dollar based decision on your part.

So why BLOCK-OFF. Was it because you "heard" it was the way to deal with probable failure of the SAI system. Not knowing, you could simple and cheaply add a replaceable filter at the time. Now that you know; Would you block-off or add a replaceable filter?

Yes, starter job on a VVT is a bit more difficult. But no big deal. We need to cut and replace the larger $20 hose. But this is only about once in every 250k miles or so, when time for starter. The SAI system, if air filtration kept good just like as with engine air intake filter. Stay health for a million miles or more. (see the: Million mile, Toyota Tundra 4.7L VVT).

Also worth a note here:
We've been seeing, with the kits that tap into the MAF. Some engine issues, in the 100 and 200 series. In that we're getting reports of stalls, fuel boiling and CAT failures after install. It's undetermined at this time, if just a coincidence to the install of block off kits or because of wiring to MAF with the kit.

Anyone considering block off, should also read the Hewitt disclaimer posted below:

The products manufactured and sold by Hewitt Technologies Inc. are for off-road or competition use only, no other applications are intended or implied. Our bypass kits are not EPA/CARB certified and are not legal for street-use.

In general, it is illegal to bypass or otherwise make inoperable an emissions system required for highway use. The vehicle owner and installer acknowledge and assumes ALL risks associated with the purchase, installation and use of our products.


S.A.I filter mod, to keep system functioning as designed.
Simple piping (hose) made from off-the-shelve parts. Run form SAI pump air inlet, out from under intake manifold to daylight, where filter can be easily replaced.
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So I understand. You block-off the SAI as PM, to prevent a possible future failure. A while you're in there thing! Nothing was wrong with it at the time.

Block-off kits, ~$450. The filter mod, is less than $100 in parts. So wouldn't think, it was a dollar based decision on your part.

So why BLOCK-OFF. Was it because you "heard" it was the way to deal with probable failure of the SAI system. Not knowing, you could simple and cheaply add a replaceable filter at the time. Now that you know; Would you block-off or add a replaceable filter?

Yes, starter job on a VVT is a bit more difficult. But no big deal. We need to cut and replace the larger $20 hose. But this is only about once in every 250k miles or so, when time for starter. The SAI system, if air filtration kept good just like as with engine air intake filter. Stay health for a million miles or more. (see the: Million mile, Toyota Tundra 4.7L VVT).

Also worth a note here:
We've been seeing, with the kits that tap into the MAF. Some engine issues, in the 100 and 200 series. In that we're getting reports of stalls, fuel boiling and CAT failures after install. It's undetermined at this time, if just a coincidence to the install of block off kits or because of wiring to MAF with the kit.

Anyone considering block off, should also read the Hewitt disclaimer posted below:

The products manufactured and sold by Hewitt Technologies Inc. are for off-road or competition use only, no other applications are intended or implied. Our bypass kits are not EPA/CARB certified and are not legal for street-use.

In general, it is illegal to bypass or otherwise make inoperable an emissions system required for highway use. The vehicle owner and installer acknowledge and assumes ALL risks associated with the purchase, installation and use of our products.


S.A.I filter mod, to keep system functioning as designed.
Simple piping (hose) made from off-the-shelve parts. Run form SAI pump air inlet, out from under intake manifold to daylight, where filter can be easily replaced.
View attachment 3496142
View attachment 3496144View attachment 3496145
Apologies for being blunt, but it's my rig, I am it's mechanic, and I'll repair, modify, and use it as I see fit :).

For the record, the delete was $53, was installed 3 years and 40k miles ago, and has had zero issues of any kind.
 
It's amazing, how many admit to federals crimes online line.:jimlad:


I asked Bing Chat (AI): Penalty for violating emissions controls?
"According to the Clean Air Act and its regulations, violators of the prohibitions against tampering and defeat devices are subject to civil penalties up to $45,268 per noncompliant vehicle or engine, $4,527 per tampering event or sale of defeat device, and $45,268 per day for reporting and recordkeeping violations. In some cases, criminal charges may also apply. Tampering and defeat devices are illegal and undermine vehicle emissions controls, which protect public health and the environment from air pollution"o_O

OH s***!

You gonna snitch?
 
You gonna snitch?
No, not me.. But don't underestimate, the governments use of AI to collect and use information in the digital world. OH s***!

Me, I just think all that own a ICE vehicle made after ~2005. Needs to know there is an issue with SAI system, the options and ramification. Seems, most only hear about blocking off. IMHO, that's a bad option.

@2001LC If I’m understanding this correctly, in order to install your filter mod one must remove the intake?
Yes, intake manifold must be removed.

Mod, is best done at time of starter job or do starter while in there. It's also a good idea to replace the intake manifold and throttle body, rubber gaskets periodically anyway. They're shrinking and leaking.
 

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