When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Very nice work, and clean welds. Loving the transition to clear the under braces. Could we get a video of it idling once it's back up and running?
welds would be better if I had 1/32 rod vs 1/16. Yea, have to snake it back up or the muffler sits too low.
iphone won’t capture idle sound properly, but with Varex muffler closed it is quite. Adding the muffler made it substantially more quiet on the highway with Varex closed. However, significant resonance at ~3500 rpm so need to wrap and add helmholtz resonator.
Had a little fun this weekend. Definitely makes a difference, but not as much at the tuned RPM I was seeking. 27" for ~3700rpm is what I came up with.
My wife was tired of the Honda Minivan so I purchased her a new 2019 Kia Stinger GT AWD, which is a 3.3L V6 TwinTurbo. Never thought I would be a Kia fan, but their new designs are looking sharp. Cool car for the money and she picked the color!
Last edited by 240Z TwinTurbo; Feb 3, 2020 at 07:20 PM.
From factory, The exhaust has a resonator in the mid pipe before it goes by the rear diff. I've found that is the best place for resonator in the car. The test pipe/cat resonator doesn't work very well.
From factory, The exhaust has a resonator in the mid pipe before it goes by the rear diff. I've found that is the best place for resonator in the car. The test pipe/cat resonator doesn't work very well.
The Dynomax resonator was added last month and made a big difference vs the CAT so I am pleased with that mod and the subsequent results. I added the HelmHoltz Resonator (HHR) this weekend before the Dynomax resonator so that was the purpose of the post. It made a noticeable difference overall, but not as much as I wanted at ~3700rpm targeted based on the 27" length. From what I read the HHR should be as close to the engine as possible.
Regarding your comments, I may also add a resonator at the point you described, but a "bullet resonator" around the diff area since it can't be too large of a diameter due to space constraints. It is actually pretty dang quite below ~3200rpm cruising with the Varex Muffler closed so that is a good thing since I can now have a phone conversation. I think I need to go with a 4.11 gear as well so I don't hit that magical ~3500rpm when cruising.
Damn header has another crack so time for Plan B. I purchased this manifold off Walker@MPFab a few months back so will just swap it out and redo the downpipe since it was designed for the BW turbo. I will likely go external dumps and I am getting a quote to have my S362 upgraded to an S366, but keeping the 68mm turbine wheels so 6668. Should get interesting!
Thats a bummer on the cracks. Those dumps are going to be pretty loud on pump gas. Surprised you are going that route based off your muffler projects. An open dump has a place on a 1000whp+ project IMO. At least for street car duty.
As much as you enjoy fab work, I'll give you 4 weeks of noise until you take it back apart and recirculate it. LOL
Damn header has another crack so time for Plan B. I purchased this manifold off Walker@MPFab a few months back so will just swap it out and redo the downpipe since it was designed for the BW turbo. I will likely go external dumps and I am getting a quote to have my S362 upgraded to an S366, but keeping the 68mm turbine wheels so 6668. Should get interesting!
I'm not sure if you mean you're just getting a new manifold from MPFab or if you're getting a new one from someone else, but I cannot suggest Morrison Fabrications highly enough if you're going with someone else. They use 321 and the fit and finish on their manifolds is the best I've ever seen, and I've seen a lot of manifolds up close!
Well that will definitely be interesting to see the 6668! In my time at Whalen's Speed, we installed a variety of the S300's and the 63mm and 64.5mm definitely outperformed the 61mm. 15mm is a pretty big jump from turbine to compressor though! Very Garrett-like XD .
Thats a bummer on the cracks. Those dumps are going to be pretty loud on pump gas. Surprised you are going that route based off your muffler projects. An open dump has a place on a 1000whp+ project IMO. At least for street car duty.
As much as you enjoy fab work, I'll give you 4 weeks of noise until you take it back apart and recirculate it. LOL
You might be right, but we'll see. I need to get it up quickly so I don't put a bunch of miles on my GTR. Just making dumps saves time and will likely allow for significant HP gains.
Originally Posted by RWD4G63
I'm not sure if you mean you're just getting a new manifold from MPFab or if you're getting a new one from someone else, but I cannot suggest Morrison Fabrications highly enough if you're going with someone else. They use 321 and the fit and finish on their manifolds is the best I've ever seen, and I've seen a lot of manifolds up close!
Well that will definitely be interesting to see the 6668! In my time at Whalen's Speed, we installed a variety of the S300's and the 63mm and 64.5mm definitely outperformed the 61mm. 15mm is a pretty big jump from turbine to compressor though! Very Garrett-like XD .
The actual manifold in that pic is at my house since Walker went with an EFR turbo on his new setup. I already test fit it with my 362SXE when I fixed the cracks last time so I know it works with the stock radiator. Whalen's work is exceptional, but so is MPFab. Still waiting on AGP to give me a quote so I can determine whether I want the custom 6668 or just buy and off the shelf S364.5. What gains did you see from S362 to S364.5?
The actual manifold in that pic is at my house since Walker went with an EFR turbo on his new setup. I already test fit it with my 362SXE when I fixed the cracks last time so I know it works with the stock radiator. Whalen's work is exceptional, but so is MPFab. Still waiting on AGP to give me a quote so I can determine whether I want the custom 6668 or just buy and off the shelf S364.5. What gains did you see from S362 to S364.5?
Ahh, I see what you're saying now. I clearly didn't pay enough attention to the pictures haha. The 63mm and 64.5mm just make more power everywhere basically. We never had a direct back to back comparison, but it was pretty obvious that the larger inducer/exducer wheel was better at the boost pressures we run. The boost threshold change is pretty minor.
