Any interest in 3.5 dia intakes - Lexus IS Forum
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post #1 of 17 (permalink) Old 02-07-2019, 03:54 PM Thread Starter
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Any interest in 3.5 dia intakes

I have been researching building a 3.5 inch diameter intake with signal conditioner.
I am sure I can do it. I am gauging interest at the moment. No one currently makes one. The last company was SRT. I do not know cost at the moment. Still figuring out materials. Please post if there is some interest.
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post #2 of 17 (permalink) Old 02-08-2019, 12:05 PM
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Originally Posted by 01 SolarYellow View Post
I have been researching building a 3.5 inch diameter intake with signal conditioner.
I am sure I can do it. I am gauging interest at the moment. No one currently makes one. The last company was SRT. I do not know cost at the moment. Still figuring out materials. Please post if there is some interest.
I'm somewhat new to the platform here, but not new to performance cars, as I've driven/modded everything from old GM musclecars to turbo Mustangs to German imports. IMO, I personally don't see a huge advantage (at least for NA applications) in running a 3.5" intake pipe when overall airflow is still limited by the MAF sensor and TB size, etc. I could be totally off base here, but past experience tells me that the system will only flow as much as the smallest choke point. I'm open for discussion though!
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post #3 of 17 (permalink) Old 02-08-2019, 02:24 PM
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I've seen people on Facebook still wishing for SRT intakes
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post #4 of 17 (permalink) Old 02-09-2019, 06:37 AM Thread Starter
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Originally Posted by lexa$$01 View Post
I'm somewhat new to the platform here, but not new to performance cars, as I've driven/modded everything from old GM musclecars to turbo Mustangs to German imports. IMO, I personally don't see a huge advantage (at least for NA applications) in running a 3.5" intake pipe when overall airflow is still limited by the MAF sensor and TB size, etc. I could be totally off base here, but past experience tells me that the system will only flow as much as the smallest choke point. I'm open for discussion though!
I hear you. But it has been proven with the old SRT intake there is a slight gain with the stock throttle body. But as I said I will re calibrate the signal for the larger pipe. I am also looking at the people that run the 80mm throttle body upgrade. I will also be looking at doing a sheet metal larger intake Y. I already know I should be able to do a signal conditioner. But I am also looking at doing a better deal. Like a pro meter direst mapping. For N/A and forced induction.

My background is also in the performance domestic and import industry. I have and am building several different setups. I use to do this stuff with several others for a job. Now I am sort of retired.
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post #5 of 17 (permalink) Old 02-09-2019, 06:39 AM Thread Starter
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Originally Posted by TobiasSing View Post
I've seen people on Facebook still wishing for SRT intakes
I do not go on that platform for the IS300/GS300 stuff. I guess if you do. Give them a heads up to watch for all the products I am working on.
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post #6 of 17 (permalink) Old 02-12-2019, 02:33 PM
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Quote:
Originally Posted by 01 SolarYellow View Post
I do not go on that platform for the IS300/GS300 stuff. I guess if you do. Give them a heads up to watch for all the products I am working on.
I don't barely touch/use the website either. I just happened to see it on the homepage of my feed once. If I can see it there, that means the demand must be real. Facebook is where it's at though, if only I felt like getting into things there
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post #7 of 17 (permalink) Old 02-13-2019, 08:14 AM
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Originally Posted by 01 SolarYellow View Post
I hear you. But it has been proven with the old SRT intake there is a slight gain with the stock throttle body. But as I said I will re calibrate the signal for the larger pipe. I am also looking at the people that run the 80mm throttle body upgrade. I will also be looking at doing a sheet metal larger intake Y. I already know I should be able to do a signal conditioner. But I am also looking at doing a better deal. Like a pro meter direst mapping. For N/A and forced induction.

My background is also in the performance domestic and import industry. I have and am building several different setups. I use to do this stuff with several others for a job. Now I am sort of retired.
I can maybe see where a larger intake pipe for ppl building like a max effort FBO NA car (as you indicated) may be useful, but I'm still of the opinion that a modified factory airbox is best for 90% of mildly modded folks. I believe that I even recall that someone posted up that they lost a good bit of performance off of their 0-60mph time w/an SRT pipe. Maybe you gain it back it at higher speed, but I haven't seen that data? Anyway, plz don't take my comments the wrong way, as I applaud yours or anyone's efforts to do stuff like this! I'm actually curious to hear more about your proposed sheet metal upper y-intake as well man!
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post #8 of 17 (permalink) Old 02-13-2019, 11:40 AM Thread Starter
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Quote:
Originally Posted by lexa$$01 View Post
I can maybe see where a larger intake pipe for ppl building like a max effort FBO NA car (as you indicated) may be useful, but I'm still of the opinion that a modified factory airbox is best for 90% of mildly modded folks. I believe that I even recall that someone posted up that they lost a good bit of performance off of their 0-60mph time w/an SRT pipe. Maybe you gain it back it at higher speed, but I haven't seen that data? Anyway, plz don't take my comments the wrong way, as I applaud yours or anyone's efforts to do stuff like this! I'm actually curious to hear more about your proposed sheet metal upper y-intake as well man!
The sheet metal Y. Was something I have been toying with for a while. The factory Y is a bit of a bottle neck. Especially if you go to the 80mm throttle bay off the LS.. It is funny I mentioned it a while back. But no one was even interested. That is why I put it on the back burner for a bit.

I know the result you are referring to on the intake pipe size. The torque drop is from the free flow of air and the fuel map and timing map. Unfortunately there is not a simple way to modify the timing map. So you must (fudge) it as much as the system will allow without hurting the over all power.
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post #9 of 17 (permalink) Old 02-13-2019, 05:32 PM
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Originally Posted by 01 SolarYellow View Post
The sheet metal Y. Was something I have been toying with for a while. The factory Y is a bit of a bottle neck. Especially if you go to the 80mm throttle bay off the LS.. It is funny I mentioned it a while back. But no one was even interested. That is why I put it on the back burner for a bit.

I know the result you are referring to on the intake pipe size. The torque drop is from the free flow of air and the fuel map and timing map. Unfortunately there is not a simple way to modify the timing map. So you must (fudge) it as much as the system will allow without hurting the over all power.
Ya, I just more or less joined the forum...been lurking for a while and reading up on NA mods stuff. Please post up any progress on the sheet metal Y intake...would love to read/hear more about it!
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post #10 of 17 (permalink) Old 02-13-2019, 06:20 PM Thread Starter
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Originally Posted by lexa$$01 View Post
Ya, I just more or less joined the forum...been lurking for a while and reading up on NA mods stuff. Please post up any progress on the sheet metal Y intake...would love to read/hear more about it!
I will let everyone know when I get back to it. When it comes down to it. I am retired and just like doing this stuff. It is hard to stop doing it after 33 plus years of doing it.
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post #11 of 17 (permalink) Old 02-13-2019, 10:13 PM
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I would like to add food for thoughts here, a pretzel maybe
removing the Y intake and fitting either sheet metal or custom cast alloy intake between the TB and the runners is a normal practice in the UAE, HP figures are 300+ WHP or even more on a heavily massaged heads in either NISSAN TB48 or TOYOTA 1FZFE, below photos are courtesy of Hamad81333 on Instagram, eye candies
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post #12 of 17 (permalink) Old 02-14-2019, 01:19 AM
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Quote:
Originally Posted by Arzon View Post
I would like to add food for thoughts here, a pretzel maybe

removing the Y intake and fitting either sheet metal or custom cast alloy intake between the TB and the runners is a normal practice in the UAE, HP figures are 300+ WHP or even more on a heavily massaged heads in either NISSAN TB48 or TOYOTA 1FZFE, below photos are courtesy of Hamad81333 on Instagram, eye candies
forgot the intake manifold--look at those exhaust manifolds!

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post #13 of 17 (permalink) Old 02-14-2019, 06:21 AM Thread Starter
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Arzon Food for thought. I may do something like that as another version. If The first works well and looks like there is a need.
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post #14 of 17 (permalink) Old 02-14-2019, 09:22 AM
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I can help post on the FB groups... I'm part of a few of them (though not super active), but I can post and vouch for you and redirect them here if you plan on making an intake.

The market will be big because a lot people that I've seen in the groups aren't educated enough and/or can't afford to go FI or swap, so they buy into the NA mods. If you built a prototype and had some dyno figures with gains, then I'm sure your inbox will be flooded with PM's on orders. (You could do a pre-order at that point to jumpstart your business)
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post #15 of 17 (permalink) Old 02-14-2019, 10:08 AM
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located in socal? I helped Danielm prototype the mazzuri header. I'm in love with n/a

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