my first manifold
my first manifold
09-13-08, 02:46 AM
#7
WOW!!, Gorgeous work and good design.
Just 1 MAJOR FLAW. You used a ON-CENTER turbine housig which is JUNK. It was designed as a space saver on specific old school desiel machinery and really doesn't save **** for space, but it does kill spool up and top end power signifacantly ( like near 15~20 % depending). If a standard tangical housing works, then well done my friend. If that manifold only fits with the bastard POS on-center, then sorry you put all that hard work into it (it'll still work though, but I question why the hard work and major attention to detail o the mani, but why pick such a cheap and POS turbo?). Really nice fab work though, probley the best I've seen in a long long while. The braces are very impressive as well.
~Mike..............
Just 1 MAJOR FLAW. You used a ON-CENTER turbine housig which is JUNK. It was designed as a space saver on specific old school desiel machinery and really doesn't save **** for space, but it does kill spool up and top end power signifacantly ( like near 15~20 % depending). If a standard tangical housing works, then well done my friend. If that manifold only fits with the bastard POS on-center, then sorry you put all that hard work into it (it'll still work though, but I question why the hard work and major attention to detail o the mani, but why pick such a cheap and POS turbo?). Really nice fab work though, probley the best I've seen in a long long while. The braces are very impressive as well.
~Mike..............
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09-13-08, 06:18 AM
#8
weiRtech
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read below first:
i agree with the turbo not being ideal. i tried to convince the customer to go with something newer, but they are set on rebuilding this old turbonetics turbo. the other downside to using an on-center turbine, is that the manifold is effectively useless for something that is off center (as mentioned by mike). i am going to try and make a jig using a gt35r before it goes away so i can make another. the attention to detail stems from the idea of not building anything i wouldn't want to put on my own car... also i provide a lifetime warranty on anything i make so i want to make sure i don't see it again.
this manifold is 100% stainless. i made it for $600. right now i only do fab work for local people though.
WOW!!, Gorgeous work and good design.
Just 1 MAJOR FLAW. You used a ON-CENTER turbine housig which is JUNK. It was designed as a space saver on specific old school desiel machinery and really doesn't save **** for space, but it does kill spool up and top end power signifacantly ( like near 15~20 % depending). If a standard tangical housing works, then well done my friend. If that manifold only fits with the bastard POS on-center, then sorry you put all that hard work into it (it'll still work though, but I question why the hard work and major attention to detail o the mani, but why pick such a cheap and POS turbo?). Really nice fab work though, probley the best I've seen in a long long while. The braces are very impressive as well.
~Mike..............
Just 1 MAJOR FLAW. You used a ON-CENTER turbine housig which is JUNK. It was designed as a space saver on specific old school desiel machinery and really doesn't save **** for space, but it does kill spool up and top end power signifacantly ( like near 15~20 % depending). If a standard tangical housing works, then well done my friend. If that manifold only fits with the bastard POS on-center, then sorry you put all that hard work into it (it'll still work though, but I question why the hard work and major attention to detail o the mani, but why pick such a cheap and POS turbo?). Really nice fab work though, probley the best I've seen in a long long while. The braces are very impressive as well.
~Mike..............
this manifold is 100% stainless. i made it for $600. right now i only do fab work for local people though.
09-13-08, 04:56 PM
#13
weiRtech
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09-13-08, 09:22 PM
#15
That is some beautiful fabrication! I see and appreciate that you have great pride in your work.
Besides being crippled by the customer's choice of on center undivided turbo, I do see one other thing I would request changed as a customer.
Like most manifold designs, you have your wastegate entry 90 deg to the runners. I have found when using a small turbo for good spool it is important to design the wastegate entry for good flow by diverging at an angle to avoid boost creep.
Most people say the boost creep is from too small a turbo, but if manifold design fixes the boost creep and the peak power goals are met, I say the problem is the wastegate merge limiting wastegate flow.
Besides being crippled by the customer's choice of on center undivided turbo, I do see one other thing I would request changed as a customer.
Like most manifold designs, you have your wastegate entry 90 deg to the runners. I have found when using a small turbo for good spool it is important to design the wastegate entry for good flow by diverging at an angle to avoid boost creep.
Most people say the boost creep is from too small a turbo, but if manifold design fixes the boost creep and the peak power goals are met, I say the problem is the wastegate merge limiting wastegate flow.
09-13-08, 10:00 PM
#16
Fab-u-lus! It looks like the runners are pretty close to equal length. Are they? From what I read when researching for my manifold, ideally the runners should extend 3" from the exhaust ports before bending. Your first turn out of the front rotor is so gradual that it's all academic. Looks great!
Sched 10 pipe? Did you acid wash or polish the pipe before welding to get it shined up?
Sched 10 pipe? Did you acid wash or polish the pipe before welding to get it shined up?
Last edited by 13brenova; 09-13-08 at 10:18 PM.
09-13-08, 10:36 PM
#17
weiRtech
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That is some beautiful fabrication! I see and appreciate that you have great pride in your work.
Besides being crippled by the customer's choice of on center undivided turbo, I do see one other thing I would request changed as a customer.
Like most manifold designs, you have your wastegate entry 90 deg to the runners. I have found when using a small turbo for good spool it is important to design the wastegate entry for good flow by diverging at an angle to avoid boost creep.
Most people say the boost creep is from too small a turbo, but if manifold design fixes the boost creep and the peak power goals are met, I say the problem is the wastegate merge limiting wastegate flow.
Besides being crippled by the customer's choice of on center undivided turbo, I do see one other thing I would request changed as a customer.
Like most manifold designs, you have your wastegate entry 90 deg to the runners. I have found when using a small turbo for good spool it is important to design the wastegate entry for good flow by diverging at an angle to avoid boost creep.
Most people say the boost creep is from too small a turbo, but if manifold design fixes the boost creep and the peak power goals are met, I say the problem is the wastegate merge limiting wastegate flow.
Fab-u-lus! It looks like the runners are pretty close to equal length. Are they? From what I read when researching for my manifold, ideally the runners should extend 3" from the exhaust ports before bending. Your first turn out of the front rotor is so gradual that it's all academic. Looks great!
Sched 10 pipe? Did you acid wash or polish the pipe before welding to get it shined up?
Sched 10 pipe? Did you acid wash or polish the pipe before welding to get it shined up?
09-14-08, 07:43 AM
#25
weiRtech
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the welder is usually set to 120 and i use the pedal to moderate it, so i couldn't really say exactly what amps it is at, i know it is close to full at pipe to flange joints and maybe a little more than half on pipe/pipe joints. 16g dp tubing is probably a third of the way down.