Do you know if the HP48 has a standard exhaust flange bolt pattern or is it proprietary? I will probably just cut off the v-band and weld on my 90 degree, but if it was somethiing standard that I can buy off the shelf, I won't cut this one and will order one to customize.
In reply to dherr :
It's proprietary. I've had good luck transferring the flange shape onto a plate, cutting the center out with hole saws, and ovaling a tube to fit the hole to get a better outlet adapter
whiskey_business said:In reply to dherr :
It's proprietary. I've had good luck transferring the flange shape onto a plate, cutting the center out with hole saws, and ovaling a tube to fit the hole to get a better outlet adapter
Ooh, I like that idea, especially since i'm a bit worried about how much the wastegate will have to flow in my usage.
In reply to bluej :
I'll look for my pictures of the thing, it turned out pretty beautifully.
Thanks for confirming, I can definitely do that.
Not sure how well you can see in this picture, but this is the hotside I built for a 10.3L V8. Below is it at full song.
Wow, that is impressive! Hope mine does not get quite that hot :-)
Any suggestions on the flange plate (thickness and material)? I would prefer to use Stainless if I can find it as the downpipe is all stainless 304.
In reply to dherr :
I'd use no thinner than 3/8, this was 1/2". We had mild steel on hand for this, plus it iis more resistant to cracking and less expensive. 304 or 409 are good stainless varieties for doing something like this as well.
^ That's beautiful. Brings a tear to me eye :)
I also hope mine doesn't get anywhere near that hot. Thanks for the suggestions on the flange, too.. I was going to fab a new one as well based on previous discussions.
In reply to WonkoTheSane :
Always happy to help. And believe it or not, that turbo shown above ran like that for 500+ hours at a time. Continuously.
Picked up a 304 3/8 plate for this, so will wait for my 90 to come in and will build my own in SS. Should have pictures next week.
Dumb question, but do you remember what the thickness of the manifold tubing was that you used? I'm planning on getting some els to make a manifold, and I'm torn between over and under doing it thickness-wise.
Thanks!
In reply to WonkoTheSane :
Used schedule 10 stainless butt weld elbows. They're in the ballpark of 1/8 inch thick. Always overshoot with them, better to be too heavy than get a nasty header crack.
That sounds like what I was looking at using. The next step up was ~.200" or so which seemed overkill. I knew I didn't want anything less than .090", since I'd be worried about the weight of the assembly causing problems, if not the heat.
I ordered a 304 Stainless Steel Tube 3mm (11 Gauge) Thick 2.5" O.D. Elbow 90 Degree Pipe so it sounds like .12 so close enough. I get the plate this weekend, so will cut it out and should have my downpipe completed next week.
dherr said:I ordered a 304 Stainless Steel Tube 3mm (11 Gauge) Thick 2.5" O.D. Elbow 90 Degree Pipe so it sounds like .12 so close enough. I get the plate this weekend, so will cut it out and should have my downpipe completed next week.
Cool! Where did you end up ordering from?
I'm still 6 months ito from starting my project.. I blame the two month old twins on my laziness.
In reply to WonkoTheSane :
It was for work, so everything was from McMaster. They're fast and convenient, but expensive.
Plumbing supply places are much cheaper.
I just ordered one from ebay
CX-304-Stainless-Steel-Tube-3mm-11-Gauge-Thick-2-5-O-D-Elbow-90-Degree-Pipe
Was exactly as described, just got it yesterday, so should be building my downpipe over the weekend
Cool. I've had CXRacing bookmarked on this project, along with prlmotorsports for the miata header flange.
I love McMaster, but you're right, they're not the cheapest.
Finished my downpipe and flange, I think it turned out pretty good.
I have a 1d 3" 409ss donut...would of been perfect for that downpipe
In reply to dherr :
Looking good!
It should flow much better than the original end plate, which was 2" , my exhaust is 2.5" from the turbo, down to 2" in the middle and splitting to two 2" pipes on each side of the diff to two mufflers. For this small turbo, it should help it to spool quickly and my boost goals are modest (10 psi) so looking forward to getting this fired up!
In reply to malibuguy :
Yes, that donut would have been okay except 3" is larger than my turbo exhaust flange plate!
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