Modified L31 with a Proflow 4 system

[Fast355]

Yes sir I believe they will. That is really a nice setup.

Thank You

[TriumphR3]

Nothing like keeping the factory look.

[Fast355]

I do like keeping things under cover as much as possible.

Tested the ram air function earlier with the filter in place. With two scoops in place should be even more effective.

https://youtube.com/shorts/MLogcEp7g...Wi9iDfGFzOoyL9

[Fast355]

Ducting arrived today, re-tested with the full lengths of 4" ducting. It will be cut to proper length when it is fitted.

https://youtu.be/s6MIf4ckeAE?si=JnvdC8_HneXgL0L5

[TriumphR3]

That is definitely something I’m going to look into, as I’m running a 14” open filter. I had always wondered about heat sink and what kind of affect it would have my 88 C1500

[TriumphR3]

The air cleaner assembly has actually come down even more now. The filter element is actually standard for my C1500

[Fast355]

Just an update on this. I swapped the PF4s single plane manifold for a Mercruiser MPI Dual Plane using the rest of the PF4 system and installed old TH315Y Thorley Tri-Ys and put a mandrel bent dual 2.5" exhaust on this. I have been driving it since last week daily. Runs very strong for what it is. Actually had it pull down a 5
9s 0-60 on my GPS performance app which is fairly accurate. Stall the stock converter a bit, walk it off the line and send it and it moves pretty darn good. 60 mph is about 5,600 rpm in 1st gear. With the GM 6492 roller cam, 1.6 full roller rockers, aftermarket vortecs thw dual plane, 4bbl throttle body, tri-ys and 2.5" free flowing exhaust this little 350 happily and easily rwvs to the 5,800 rpm rev limiter. It does not really fall off up stairs just pulls.

0-60 PF4 Data screen capture with audio
https://youtu.be/UjEKGehu1M8?si=vv7HNWoAbrkuwYSU

~60-65 mph cruise with a 3-2 kickdown and acceleration to ~85 mph

https://youtu.be/BjKfFEwvVKA?si=RqVgVX5j0vO_-Qyi

What it sounds like with the headers, dual 2.5" mandrel bent exhaust using the dual in/dual out magnaflow built turbo muffler. Unkowingly the tail pipes were welded up with a chunk of shreded brake lathe silincer band inside one of the, they had been laying around my friends muffler shop for years before we cut them up and made the fit. XP5033/XP5034 tailpipes for a GM A-Body modified to fit the van.

https://youtube.com/shorts/AP9oFP9kM...luyWGMnH-6m_AD