Downpipe for T25 and HKS manifold on a 1.8 NB. - Miata Turbo Forum - Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 03-06-2007, 08:01 PM   #1
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Default Downpipe for T25 and HKS manifold on a 1.8 NB.

Finally I have collected all the bits for my turbo kit....except for the downpipe.

I have a HKS cast manifold (like the greddy one) and a sr20det T25.

I tought I should be able to weld a downpipe myself, but the problem is that I haven't really the skill to do a good job and not much time to dedicate to learn to weld... but I want my turbo miata asap, cause my project started in october and now I really want to see this car done.

What do you think I can do?
There is someone that has already built one for this setup and sells a downpipe or can build one for me?
Begi doesn't......and selling the hks manifold to someone is very hard here because no one has a turbo miata in italy (mine will be the first) and shipping abroad from italy cost an eye and a leg.

Buying the manifold+downpipe combo from begi seems the only thing to do...
Any other options?

Thanks...
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Old 03-06-2007, 08:08 PM   #2
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http://www.ilmotorsport.de/shop/arti...a3d949fb9f803d

Its a hks downpipe (only bigger)but only for the 1.6, but will be close to what you want (and in europe)
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Old 03-06-2007, 08:29 PM   #3
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Thanks, doesn't look so bad...
The exhaust flange is different (sr20det T25 has a 5 bolt style flange) but I should be able to modify just that... I don't know if the placement is ok, anyway...
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Old 03-06-2007, 08:48 PM   #4
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I know it uses the 300zx tt housing (4 bold) but i think there will be no big issues there...
I hounestly don't know is it hooks up to the 1.8 downpipe...
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Old 03-06-2007, 10:10 PM   #5
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Quote:
Originally Posted by jhoexp View Post
What do you think I can do?
There is someone that has already built one for this setup and sells a downpipe or can build one for me?

Buying the manifold+downpipe combo from begi seems the only thing to do...
Any other options?
Check this in-house fab.
https://www.miataturbo.net/forums/showthread.php?t=7130
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Old 03-11-2007, 06:13 PM   #6
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Thanks
Sent a ton of mail to everyone... bu no answer for now.
Asked begi for a manifold + downpipe combo but no reply....

Last edited by jhoexp; 03-11-2007 at 08:19 PM.
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Old 03-11-2007, 07:43 PM   #7
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You know what I can do for you. I'm also running the HKS manifold with a T25(share pics of your setup) and I'm going to be taking my car to a shop here to build me a custom exhaust.. I can have one made for you too.. the only problem I see is that my car is an NA not a NB.
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Old 03-11-2007, 08:23 PM   #8
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Pm for you Pakman!
Na or Nb, as long as we have the same manifold/turbo, should not be a problem...

Tomorrow (my time is gmt +1 ) I'll take all the picture...
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Old 03-14-2007, 04:31 PM   #9
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Would it be easy to adapt the begi greddy downpipe for it..

Maybe if you ask begi there is a possibility to have some mods on that downpipe.
I use the same combo (91 car,94block,99head)
The placement is very simular as the greddy... Ask them not to weld a flang on it and sent you a t25/28 flange.
Also ,as the placing of the turbo is a bit more to the front of the car, ask them to lenghten up the pipes on the flange side...
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Old 03-14-2007, 05:01 PM   #10
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Or someone needs to send Begi a HKS mani so they can build one. If you're serious about having a quality DP made, then go that route.
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Old 03-14-2007, 05:22 PM   #11
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call corky, if they have time they'll build you a DP if you send them your manifold and turbo.
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Old 03-14-2007, 07:27 PM   #12
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Depending on your fabrication skills you could make the downpipe, but only tack it, then take it to a pro to finish the welding. That would be cheep and it would still be your downpipe.
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Old 03-14-2007, 07:36 PM   #13
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I think the market is to smal to create 4 new downpipes (1.6 & 1.8)(na/nb)
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Old 03-14-2007, 10:07 PM   #14
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Greddymx5, CJernigan I asked Begi about a downpipe for the hks manifold. Stephanie said that they don't build one for that manifold that suit my needs.

Ok, then I asked them if they could build one for me, I proposed to ship my hks manifold. No reply.
Then asked again if they can sell to me one of their downpipe so that I can modify it. No reply.
Then asked again if they can sell to me a manifold and downpipe combo and ship it to italy. No reply.

Now, tell me...what do I have to think about that??
Are they so busy that they even have time to say: "Sorry, we don't want to ship it to Italy" (why??) or "We won't do that for you" ??

I think it's the wrong way to make a new customer. Very disappointed.
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Old 03-14-2007, 10:14 PM   #15
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Weird about them not communicating. Stephanie who takes care of most of the office things has posted on the forums today even so I don't see why they would not reply.
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Old 03-18-2007, 02:49 AM   #16
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I have the same issue. Greddy kit that I want to put on a '97. oh, and I'm a cheap bastard. The HKS manifold fits that build but doesn't solve the DP question. I'd love to hear what everyone finds out
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Old 03-19-2007, 01:50 PM   #17
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Quote:
Originally Posted by jhoexp View Post
Greddymx5, CJernigan I asked Begi about a downpipe for the hks manifold. Stephanie said that they don't build one for that manifold that suit my needs.

Ok, then I asked them if they could build one for me, I proposed to ship my hks manifold. No reply.
Then asked again if they can sell to me one of their downpipe so that I can modify it. No reply.
Then asked again if they can sell to me a manifold and downpipe combo and ship it to italy. No reply.

Now, tell me...what do I have to think about that??
Are they so busy that they even have time to say: "Sorry, we don't want to ship it to Italy" (why??) or "We won't do that for you" ??

I think it's the wrong way to make a new customer. Very disappointed.
Dude you are in Itally the customs and shipping hassles are enormous when dealing with overseas i would think it wouldnt be worth there trouble ot get you stuff. And in the long run it would be easier for you to get something done local.
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Old 03-19-2007, 01:54 PM   #18
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ask begi to sent you the flange and go to a local shop?
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Old 03-19-2007, 03:58 PM   #19
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Quote:
Originally Posted by magnamx-5 View Post
Dude you are in Itally the customs and shipping hassles are enormous when dealing with overseas i would think it wouldnt be worth there trouble ot get you stuff. And in the long run it would be easier for you to get something done local.
Ok, I am in Italy. Anyway it's not an excuse for begi to not reply my e-mail.

Even if the customs and shipping are expensive, the result is that the downpipe + shipping + customs etc cost a LOT less then having it fabbed here.
In Italy (thanks to the euro and the hight cost of the labour) exhaust shops that can do a downpipe are so expensive that It will cost around 500 euro (more that 700$) not considering that I must live the car in the shop, and let them do the job.

Consider that mine will be the first turbo miata in Italy, and turbo-ing a Na car is almost unknown here.
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Old 03-19-2007, 04:07 PM   #20
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I stil think the begi greddy dp will be your best bet... Same turbo location,combined with a 1.6 (high flow) cat.
Take it to a welder and let him add the extra space...
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