*Turbo intesifys*

"sony1492" (sony1492) 01/05/2019 at 20:09 • Filed to: Lexus

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Made the exhaust manifolds for a second time, now with a V-band for alternator replacement and better clearance.

The twin 50mm’s do sit pretty high but it’s how it needs to be for oil drain back and fitting intake filters. Next step is somehow merging the 2 Downp ipes into a single 3".

Only the finest tools and materials for me, those bits are hacked up from a previous exhaust system.

AestheticsInMotion > sony1492 01/05/2019 at 20:22

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This is high art

sony1492 > AestheticsInMotion 01/05/2019 at 20:34

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I am entering the 5th automotive dimension.

Spamfeller Loves Nazi Clicks > sony1492 01/05/2019 at 20:35

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I wish I was there so I could show you exactly what I’m thinking. You don’t want them directly opposed, because you’ll be introducing excess backpressure and a bunch of other horrible things.

Basically, create a lopsided y. Not a Y, a y. You see where my brain is going here?

Long tube on the driver side downpipe, short tube from the passenger side, about a 45 degree meeting angle (or whatever,) and run down the passenger side so you don’t have to think about the steering column linkage or oil pan.

sony1492 > Spamfeller Loves Nazi Clicks 01/05/2019 at 21:30

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Both 2.5" will merge into a 3" that exits on the passenger side up against the frame rail and Rh manifold. I was thinking that the merge would be basically as shown below:

I see what your saying but could use more in depth expla nation.

Spamfeller Loves Nazi Clicks > sony1492 01/05/2019 at 22:32

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Well shit . My eyes were bigger than your engine. Still... mmh. This is a toughie. Because my inclination is still about  the same, sort of. But I’m thinking one in front of the other, flex section, 2 into 1 collector aft of the sway. But man... I don’t know if that description makes a lick of sense.

sony1492 > Spamfeller Loves Nazi Clicks 01/05/2019 at 23:19

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I’ll try this way first to keep complexity down, but seeing how things are going it will probably get rebuilt after the first mockup. Ef ficiency isn’t my primary concern, I just want it to work reliably.(which I know is a pipe dream)

Spamfeller Loves Nazi Clicks > sony1492 01/05/2019 at 23:25

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Reliability is actually why I’m thinking stacked (so passenger side behind driver side) downpipes, some flex, put the 2-1 collector behind the sway. That SHOULD give you all the advantages of the Y pipe I suggested, IMPROVE the reliability (the flex will keep you from breaking plumbing,) actually make it easier if you do have to take it out, and keep it simpler.

Biggest risk I see there really is locating the collector too far forward, or not enough flex room. That’ll break your pipes for sure of course, but the collector obviously will block access to (and cook) the alternator. Nominally I’d recommend relocating the alternator because I’m a perfectionist, but that sends you back to fabbing brackets and manifolds.

sony1492 > Spamfeller Loves Nazi Clicks 01/05/2019 at 23:36

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The only place the alternator can go is placed in front of the motor and turned around, but it’s still in the way of either the manifolds, Downp ipe, or s way bar.

I do want to have no cracking, but this collector will need to be before the sway bar or alternator, maybe loop the passenger side under itself and merge there?  I dont have much 2.5" pipe to work with, though I could buy more. To give an idea of scale, in the first photos the distance from the frame rail to v-band is at 3" give or take .25". As it is I’m going to be crushing the 3" into an oval to fit it past some of those sections.