My newest Absurdflow manifold: BEGI FM tubular replacement - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-30-2009, 11:30 PM   #1
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Default My newest Absurdflow manifold: BEGI FM tubular replacement

I'm in the process of piecing together my newest manifold. It is a tubular manifold that hopefully will put the turbo in the same location as the cast manifolds from BEGI and FM. People have asked me to do something that fits with A/C and P/S (duh), and after jiging the 3" bellmouth downpipe for the BEGI 1.8 kit I figured I should try to make a tubular manifold. That way it clears A/C & P/S and you could use all the gorgeous BEGI accessories/heat shields/plumbing/etc. Or FM's silicone I guess.

I don't know if it will flow as good as BEGI's (I've never seen a FM) but hopefully we will find out on the May 2 dyno day. I plan to dyno it on my internally stock '94 1.8 with the Absurdflow 3" bellmouth downpipe and my full 3" exhaust. Horray for single turbos I guess. Oh, yeah I'll be using a Garrett GT2560R, most likely from Paul or if that doesn't work out I'll take my oldass 2560 out of the subie. I'll run 12 or 14 psi, whatever we here have as a good comparison. I think johndoe might be the closest with his SGDP 2560 '94???

If it all works out, price will be more than BEGI's manifold but not much more. My downpipe is already cheaper than theirs. I don't have access to chinese turbos. Once the US gets more 2560's I hope to be around $2k for the turbo, manifold, and DP. If I make no more power than theirs then this was all for my own personal enjoyment

I'm not done yet and the first one is always crude, but May 2 is still a ways away, right?
Pics:









Buy this stuff, I need to pay for that countertop.

The ol' downpipe, true 3" bellmouthed stainless with magnaflow metal core cat. This will be close to $650 seperately, with the cat:


Thanks to those who have helped me with this, you know who you are.
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Old 03-30-2009, 11:37 PM   #2
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Good job, sir.
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Old 03-30-2009, 11:41 PM   #3
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<BS deleted.>

Nice work Tim. The compatibility with the AC/PS will definitely make me think about this in the future.

Last edited by Joe Perez; 03-31-2009 at 08:16 AM. Reason: Can the cockfighting.
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Old 03-30-2009, 11:51 PM   #4
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Originally Posted by ArtieParty View Post
Good job, sir.
Thanks buddy.

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<BS deleted.>

Nice work Tim. The compatibility with the AC/PS will definitely make me think about this in the future.
Thanks, and I hope Steph/BEGI doesn't have a problem. I doubt they will, I'm small fries. Or maybe she won't notice this thread. I'm just some guy with some cheapass Harbor Freight tools and a really nice welder (seriously if you guys saw what I use to make these manifolds you all would be doing it). I don't want to mess up my dad's business relationship with them either. I don't have anything to do with Shore Motorsports other than using their power to run my welder and doing "fab work" under their name after my real job if they need the help. I figure now that I have a house I can do this stuff on my time and start to seperate from Shore Motorsports and into the Absurdflow name.

BEGI makes nice stuff at great prices and are very eager to please. We are very lucky to have a vendor like that in our community.

Last edited by Joe Perez; 03-31-2009 at 08:17 AM. Reason: Removed BS from quote.
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Old 03-31-2009, 12:10 AM   #5
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My downpipe is already cheaper than theirs
really? lol my wallet says different
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Old 03-31-2009, 01:20 AM   #6
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This is what you need to beat.




I'm thinking you'll come up with a bit more max hp&tq but you'll make it sooner too. I predict you'll be crossing that 200ft-lb line earlier, somewhere between the 3600rpm that Jan does and the 3100 Artie & I do. More torque earlier is where it's at.
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Old 03-31-2009, 04:59 AM   #7
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Tim, do you make v-band flanged downpipes?
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Old 03-31-2009, 06:00 AM   #8
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I think the design looks great Tim. Do you, or will you offer the 3'' bellmouth without the cat?

Last edited by Joe Perez; 03-31-2009 at 08:17 AM. Reason: Deleted BS from quote.
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Old 03-31-2009, 06:04 AM   #9
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and possibly a flexpipe..
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Old 03-31-2009, 07:39 AM   #10
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No ****.

I think the design looks great Tim. Do you, or will you offer the 3'' bellmouth without the cat?
The cat should be a slip fit, so I don't see why he wouldn't. He should just offer clamps to swap the cat in/out with a test pipe. Or for the anti-y8s crowd, he could just weld in a straight pipe.

Frank
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Old 03-31-2009, 07:41 AM   #11
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and possibly a flexpipe..
There's really no need for a flex pipe in most cases. It's just a point of failure. The exhaust is cushioned by the hangars so there should be some play when the motor is torquing.

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Old 03-31-2009, 07:41 AM   #12
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Why am I speaking for Tim? I should STFU now.

Frank
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Old 03-31-2009, 08:21 AM   #13
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Old 03-31-2009, 11:16 AM   #14
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Quote:
Originally Posted by fmowry View Post
The cat should be a slip fit, so I don't see why he wouldn't. He should just offer clamps to swap the cat in/out with a test pipe. Or for the anti-y8s crowd, he could just weld in a straight pipe.

Frank
dude I tell ya I get no respect. no respect at all. /dangerfield.
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Old 03-31-2009, 11:18 AM   #15
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Tims,

I still dont like the bellmouth.

Why can't you do a siamese pipe setup? Stick a 1-1/4 pipe on the side of a 2-1/4 pipe (i think that's the outlet) and then merge them into a 3 inch in the downpipe after a foot or so. you want ABSURD flow, I bet that tickles paul's prostate about 100 rpm sooner.
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Old 03-31-2009, 11:23 AM   #16
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he's done it before:

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Old 03-31-2009, 11:30 AM   #17
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pwnd lol and he tells noobs to search lol

tim if you wanna make one for the 1.6 lemme know. i have the dp to match. and i have a potential buyer for my begi manifold if i choose absurdflow again
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Old 03-31-2009, 12:34 PM   #18
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Quote:
Originally Posted by disturbedfan121 View Post
really? lol my wallet says different
I'm taking these prices off BEGI's site. I don't know if they offer some package that I'm missing. This is for a '94:

94 stainless SGDP: $505
3" swaged end: $55
3" metal cat: $160 without flanges, $240 with flanges.

$650<$720 if you don't like flanges<$800 if you do

You (Brian) paid $50 to get the old stuff removed, mods made to your firewall and trans*, rerouting the oil pressure line to where it should be, retapping the crappy holes in your turbo, and installing the new downpipe. Cheap I think.

*trimming needs to be done to the firewall shelf and to that silly useless tang on the side of the trans to get this downpipe to fit.
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Old 03-31-2009, 12:39 PM   #19
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Quote:
Originally Posted by paul View Post
This is what you need to beat.




I'm thinking you'll come up with a bit more max hp&tq but you'll make it sooner too. I predict you'll be crossing that 200ft-lb line earlier, somewhere between the 3600rpm that Jan does and the 3100 Artie & I do. More torque earlier is where it's at.
Thanks Paul. 12 or 14 psi? I could search....

Quote:
Originally Posted by zoomin View Post
Tim, do you make v-band flanged downpipes?
I could but they are $$$. I don't even use them and I'm baller.

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Originally Posted by NA6C-Guy View Post
I think the design looks great Tim. Do you, or will you offer the 3'' bellmouth without the cat?
I will probably offer a "race only" downpipe without the cat. The flange would end after the cat. My downpipe jig goes to the flange at the beginning of the cat back. I could get an oem cat and sorta make another jig to go before that cat but that would make too much sense. Plus if you are using a downpipe that flows like this one you shouldn't be using anything other than a good 3" metal cat or no cat. And the flange angles on the OEM stuff is retarded, it makes a lot of sense to just get rid of them.

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and possibly a flexpipe..
Sure, there's room. I have flex sections on the downpipes on my car, but most of my recent (past 2 years or so) downpipes I haven't used them and so far so good. They do have added cost too, like V-bands :(
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Old 03-31-2009, 12:42 PM   #20
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pwnd lol and he tells noobs to search lol

tim if you wanna make one for the 1.6 lemme know. i have the dp to match. and i have a potential buyer for my begi manifold if i choose absurdflow again
cool deal man. It's surprising how loud the 1.6 crowd can be. Thanks for the offer, lets first see if these move and if they work any better than the cast pieces. If it's not much better than it's not worth my time I guess.
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