ajhehr

My first 13b turbo mani… howd I do?

Ok… gt35r with the tial cast stainless turbin housing.
Tial 44mmv band
Pipe is all stainless sc10
Coating is there new titanium by polydyn.

Well how’d I do?
Ive only been welding for a fiew months but it is fully back gassed and I guaranteed good penetration. I was very careful to polish of the outlet transition of the flange to the runners as well as the WG runners. All ends were beveled about 75% of the way through and set dead flush on the next pipe. Pieces were then fused together fallowed by a filler pass of 309 (seemed to like the 309 better then the 308 filler rod on my practice pieces).

I expect big things out of this…


Shot with SP510UZ at 2008-06-28


Shot with SP510UZ at 2008-06-28


Shot with SP510UZ at 2008-06-28

the next one is taken on my mock up car...

Shot with SP510UZ at 2008-06-28

IMG]http://img124.imageshack.us/img124/5919/p6240029gz6.jpg[/IMG]
Shot with SP510UZ at 2008-06-28


Shot with SP510UZ at 2008-06-28


Shot at 2008-06-28


Shot with SP510UZ at 2008-06-28


Shot with SP510UZ at 2008-06-28

NOPR

I'd say you did pretty damn well!
it looks like they're ceramic coated too?

ajhehr

yea... polydyn cals it their titanium coating

MRJACK$ON

iTrader: (1)

Hello looks good to me!!!! Nice job

Turblown

iTrader: (12)

In my experience the runner diamater is too large for that turbo. Nice work for you're first manifold however. Nice coating too

RacerXtreme7

iTrader: (2)

Nice work!! You asked, so here goes..... I agree with 1Revvin, runners a bit on the big side. Only thing it'll hurt though is turbo spool up. Also, you *might* have boost control problems due to the design of your wastegate runners being near the block instead of near the turbine housing (pressure builds near the turbine, this is why its the best place to tap your WG runners there). Maybe not because you put them on the out-side of a radious. One runner instead of two near the collector would have less interuption on your flow and have better boost control (And would have been less work fabbing and lighter weight) on a collected manifold like yours. There also not equal length which will cause slight none linear dynamics from one rotor to the next. Still nice job though!! All these things I mention really don't make up a whole lot of differance. In reality your butt dyno wouldn't know a damn differance but for those nit pickers like me I mention them.

~Mike............

ajhehr

to mister RacerXtreme7
WHERE WERE YOU!!!

https://www.rx7club.com/single-turbo-rx-7s-23/tube-manifold-wastegate-port-question-761197/

In the end i placed the WG ports where I did bc i didnt want any turbulence in the collector on its entrance to the turbine to keep the velocity up... I also thought that the wg ports places on the outside of the runner next to the port would allow plenty of pressure...

as far as the oversized pip I may still go with a gt42r, or down to a gt28r depending on what I need the car to do... autox drag road race ect. I also can run in antilag mode if I need to. with the cryo system, the Tial cast stainless housing (which is so much nicer designed then the cast steal one) and the intake mani that I am running i didnt think that Id miss a little response on the piping since thats the only place im losing velocity.


thanks everyone!!!

RacerXtreme7

iTrader: (2)

I was laid up for a week or two due to a motorcycle wreck, lol sorry I missed your post. But if you searched back theres tone of info on design were I've and several others have mentioned what I covered in my last post. D'oh! Still a very nice manifold none the less. Better then most that can be purchased! And yeah, those Tial turbines are sweet, I still prefer a split pulse manifold and divided turbine though. Its been proven over and over to spool up quicker and make more power on an equal pulse/phase engine (the rotary 2 rotor is a perfect canidate with 180* pulses), BUT I have yet to see results of comparisons with the new Tial. My Garret turbine housing has been Extrude Honed, so the only benefit from the Tial would be light weight.

~Mike..............

ajhehr

I did some searching... do you have a link?

turbo80cid

looks good, I'll bring mine right over and you can build me one.
btw I like the ITB's, what do plan for the intake maifold.

-Bill

ajhehr

I like the trumpets, so Im going to make a heart shaped plenum with the intake runner coming in from the driver side equidistant from both runners...

if you serious about needing one let me know.
ill put the wg runners where ever you want

Viking War Hammer

iTrader: (8)

what dia pipe is that ?

ajhehr

2" sc10 so like 2+1/8" id?

Viking War Hammer

iTrader: (8)

Mine are 2.25 OD, yours look bigger than mine.

Natey

iTrader: (19)

yeah, but nobody listens to Turtle.

Viking War Hammer

iTrader: (8)

ChrisRX8PR

I think they look bigger because 2" Schedule 10 pipe is about 2.375" Outside Diameter so they would look bigger than an actual 2.25"OD pipe...

Chris

Nice Work to the O by the way!!!!

fast87t2

iTrader: (1)

nice welds, considering welding cast SS is very hard to keep a strait bead due to the fact that your puddle wonders on you, it does look like when you started useing the filler rod you dipped your tungston, also did you wire brush before you did the second pass, that is very important. i always keep like 7 or 8 extra sharpened, also i trick i learned for a old welder guy is to not sharpen you tung. to a fine point also leave a bit of a rounded edge becuse after a few passed the tung will degrade and the sharp point will fall into your puddle and contaminte the weld. but very nice job. make me want to start mine.

-joe

jaggermouth

iTrader: (1)

How do you get the ITB to go with the turbo?
Just curious, sorry if its a dumb question aha

turbo80cid

here is the manifold that works with the ITB's.

http://www.tweakit.net/shop/product_...roducts_id=149

turbo80cid

I just might take you up on that....I need to get a few things figured out and I'd like to see how well your works out. I don't know when you'll have your car completed but I sure would like to check it out.

-Bill

turbo80cid

ajhehr,

are you going to the Houston RX club meeting tomorrow night?

-Bill

Zero R

iTrader: (1)

I tend to agree with RacerXtreme7 (mike) being collected you would possibly benefit a little better with the WG being in the collector and nearer the turbine. I think you will find that size TiAL to be restrictive for the runner diameter chosen. 2" runners are good for T6 split pulse turbines and/or heavy breathing motors with proper setup in place. For that I would run 1.625-1.750" ID range. As for keeping the trumpets in the plenum on a boosted motor, you will find that not to be ideal. Keep your plenum floor flat and smooth or tapered to the inlets which you will have radiused to meet the plenum floor. Think black hole.

silentblu

iTrader: (1)

thats what she said, hahha couldn't help it

RacerXtreme7

iTrader: (2)

https://www.rx7club.com/showthread.p...light=manifold

https://www.rx7club.com/showthread.p...light=manifold

https://www.rx7club.com/showthread.p...light=manifold

https://www.rx7club.com/showthread.p...ghlight=setzep

https://www.rx7club.com/showthread.p...ghlight=setzep

https://www.rx7club.com/showthread.p...ghlight=setzep

https://www.rx7club.com/showthread.p...ghlight=setzep

https://www.rx7club.com/showthread.p...ghlight=setzep

https://www.rx7club.com/showthread.p...ghlight=setzep

Some of those threads are older, but still good info. You might want to search 1Bad2ndGen <--- I think that was his handle and Riceracing along with ZeroR. They given good advice on manifolds.

The perfect and ideal turbo manifold is easy to design in theory, but it is hard to construct in reality, especially withen the confines of an engine bay. But ideally for a rotary, the consesis seems to be around 12~18" equal length, this is based on tuners experiance and not so much on mathmatical modeling. Split pulse has been proven to spool faster and make more power, again on equally pulsing engines. Those findings are universal and dicovered by F1 teams of the early 80's era along wiht many other race teams including the turbo giant Garrett. Its now common turbo knowledge. Wastegates should be placed near high pressure zones (IE: near the turbine inlet) or high gas flow areas such as the outside radius of a bend. If your running more then one WG tap/runner, they should be placed the same distance from the engine/turbine from one another. Moreover manifold construction, ideally you'd want the first 3" of your manifold comming out the engine to be straight. This has been found on flow benches AND on engine dynos to be effective by keeping turbulance out of the port due to turns. Paul Yaw deminstraights this finding. Rule of thumb I believe is it takes 3 times the ID of a pipe for the turbulance of a turn to straighten back out at maximum velocity. This holds true for the turbine inlet also, give it at least 3" or so of straight no bends. Another thing to be aware of is wastegate runners. They should be placed close to the turbine and optimumly at an angle with the flow of gases. You'd want to keep them the same length as the main runners to the point were the WG runners tap in. EX: if you have 18" main runners, and your WG runners tap in 3" before the turbine, you'd want 15" WG runners both being same length. You also want the merge of the runners to be at as a sharp angle to keep one main runner from communicating with the adjacent runner (mixing up pulses). Runner and WG diameters are dictated by your power goals and turbo sizes. Now after reading all that you can see why building the ultimate in theory manifold is a pain to construct in reality.

ZeroR brings up another good point. Your intake mani.... your not going to want trupets withen a box, rather a smoothed intrance from a wall to the runners.

~Mike.............