V8 Miata Exhaust Air In/Air Out...This area focuses on allowing your V8 Miata to exhale in the most efficient and acoustically pleasing manner possible.

Forward Facing Headers?

Old 06-09-2015, 12:27 PM
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Default Forward Facing Headers?

Anyone ever tried a set?




Overall width when in the upward position.

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Old 06-09-2015, 07:16 PM
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Cool Facing Forward

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Haven't seen it done with an LS yet but I have seen stock Ford 351 tube headers flipped forward facing. See Pic Below:



Now that's Hardcore!!
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Old 06-09-2015, 09:26 PM
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Can you get some pics from the top? Maybe an overall width?
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Old 06-10-2015, 07:23 PM
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flip them up
who needs a hood anyways
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Old 06-11-2015, 09:02 AM
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Going around the front of the motor would probably work with no AC or PS but I don't know how you would ever get it under the engine cradle and steering. You would have to raise the car quite a bit to make that work.

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Old 06-11-2015, 10:57 AM
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And you would basically be wrapping the power steering rack with hot exhaust tube. And instead of the heat from the tubes being pulled out the back of the engine bay, they have to pass back by the engine to get out. Sounds like a major heat problem in a engine bay that already has it's own cooling issue without adding that.

With all that said, what do you think you will gain by doing this? If you are thinking turbo, there are better ways. If you just think it's cool, great, good luck, love to see it.

I just don't think there is enough room to pull it off without causing problems. That is a lot of heat to just try to poke through any space it will physically fit.
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Old 06-11-2015, 01:24 PM
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Cool forward facing manifolds

I agree with WolfGT that it would be a major addition of unwanted heat just seen it had been done so I posted the pic. I have also seen it done when a SBF is installed in a Mercedes. ( Friday Night Street Drags at local track)

charchri4 you are bang on with having to raise the car to 4x4 mode, as you can see in the pics your steering end links angle up from the Rack where the flipped exhaust links are dead parallel indicating he is at least at stock height with possibly 50 series rubber. Too High for this Guy!!

Dean0
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Old 06-11-2015, 01:39 PM
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How's this?


LOL that was way too low and I moved the converters and raise the car in short order.

This is the way I ran it on the 225-45/15s


Current set up is about the same height but running 17x10s now.
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Old 06-11-2015, 02:38 PM
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Cool Low is Good

charchri4

I had an 85 Tbird that I set up for ISMA Road Racing in 90. Relocated A-arm pickups, longer A arms, 850 in/lb springs, 1 5/16 sway bar, 3 link rear set up,yada yada yada. I had to drive up on 2" x 6" blocks just so I could change the oil with a 4" oil catch can. I understand your fight, LOL. A bit off subject, with being that low how does that affect your "Bump Steer", I had to lower my steering link ends close to an 1" to get things back in shape so it wasn't a handful to drive over every bump?

I will be going the 225 / 45 /15 route on this build so thanks for the pics, very cool.

Dean0
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Old 06-11-2015, 03:02 PM
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Check out the vid at 1:15. Shes pretty low and no bump steer that I could ever tell.

https://youtu.be/uyJPsSga4QU?t=1m15s
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Old 06-11-2015, 08:37 PM
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Scissortails is working on one. See his build thread entitled "Turbo Ls1 na Miata build"
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Old 06-12-2015, 12:12 AM
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Originally Posted by jackie View Post
Scissortails is working on one. See his build thread entitled "Turbo Ls1 na Miata build"
LOL funny how that works. I thought the same thing!
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Old 06-29-2015, 08:20 AM
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Well I am adding a turbo, so underhood heat is the least of my worries lol.
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Old 06-29-2015, 08:32 AM
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Have you considered rear mount. Look at the oilless one HbWiggins is building. He got over 500 hp with 12 lbs boost and was gonna turn it up to 16 lbs for even more power. Its a build thread on this site.
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Old 06-29-2015, 08:50 AM
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No offense to anyone's work, but a remote turbo is extremely inefficient,(i did alot of research on them for a few of my other cars) I plan to run a blow through carb, while it'll require me to addadditonal hood space (which I have cleverly come up with a solution for). It will allow me to negate a intercooler for up to around 15psi.
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Old 07-29-2015, 08:04 PM
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I test fitted some truck manifolds that I had laying around last night. These are from a '09 avalanche 5.3. If I go this route, The flanges would be cut off and slightly re-directed, then v-bands would be welded to the ends. I have seen a lot of LS guys in my area running similar setups.
Attached Thumbnails Forward Facing Headers?-20150728_214224.jpg   Forward Facing Headers?-20150728_214235.jpg  
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Old 10-04-2015, 10:04 AM
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These are bbk shorties flipped I think. I tried to picture a turbo but it's just so tight up front. Well it mostly fits except for the downpipe. Rear exit is not possible. Maybe you could cut a tunnel out of the firewall and passenger frame rail.

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Old 10-19-2015, 07:32 AM
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Why just not run block hugger?
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Old 08-09-2016, 08:53 AM
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Originally Posted by Lateralgeez View Post
These are bbk shorties flipped I think. I tried to picture a turbo but it's just so tight up front. Well it mostly fits except for the downpipe. Rear exit is not possible. Maybe you could cut a tunnel out of the firewall and passenger frame rail.

Anyone notice how beat to hell those pipes are? Eek.
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Old 08-09-2016, 11:37 AM
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Talking

Originally Posted by wallyman View Post
Anyone notice how beat to hell those pipes are? Eek.
Ha ha ha
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Old 08-09-2016, 11:43 AM
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Originally Posted by sebz View Post
Ha ha ha
I've heard of "crush bent" pipes before, but don't think that is what they meant.
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Old 08-09-2016, 03:44 PM
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Aren't they lovely? Should have swapped in the coils and raised it before street driving. Oh well. It's open headers now.
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Old 08-11-2016, 06:18 PM
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Notice also how floppy and melted the rubber boots on the rack end links. YIKES!!
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Old 08-11-2016, 07:56 PM
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Originally Posted by movieboy4fun View Post
Notice also how floppy and melted the rubber boots on the rack end links. YIKES!!
The heat keeps the grease flowing nicely in the joints!
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Old 08-17-2016, 10:14 AM
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Can confirm damage to steering rack, I think. 4 pump swaps - no pump noise, no assist, must be the rack. If you have de-powered or manual rack might be ok.
Also, as you can see, reduced ground clearance crushes pipes.

In summary, forward facing headers should be considered a temporary solution, if at all.
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