Top Mount PT6262 M Coupe Turbo Build
08-17-2009, 11:15 PM
#51
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Re: Top Mount PT6262 M Coupe Turbo Build
A little, but very important progression made
Coilpacks rewired to exit the rear of the loom instead of underneath and right next to the downpipe.
Bungs
Lava Wrap
02 sensors (wideband for tuning, and wideband for in car display)
Coilpacks rewired to exit the rear of the loom instead of underneath and right next to the downpipe.
Bungs
Lava Wrap
02 sensors (wideband for tuning, and wideband for in car display)
08-21-2009, 10:55 AM
#56
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Re: Top Mount PT6262 M Coupe Turbo Build
I never said anything about the welds. It's comical to me that you judge the quality of my character based on two sentences I've posted. On a public forum you invite public scrutiny to the things you post. That's sort of how it works.
Apart from the fact that I think that whole header is a design flaw, you've got practically zero taper on the collector. That makes for very turbulent flow and higher back pressure. Having the wastegate feed off what should be an inlet to to the collector forces the exhaust gas to make an abrubt, almost 180 degree, turn. Have fun controlling boost with that.
Apart from the fact that I think that whole header is a design flaw, you've got practically zero taper on the collector. That makes for very turbulent flow and higher back pressure. Having the wastegate feed off what should be an inlet to to the collector forces the exhaust gas to make an abrubt, almost 180 degree, turn. Have fun controlling boost with that.
The welds look fine, that wasn't the point Karl was raising. Rather, it's the manifold design, which looks rather poor, to be honest. Will it work? Abso-freaking-lutely it will, but it is far from Optimal.
I understand that packaging is a huge issue on your car, so making something that fits in a tight space is definitely a challenge. Doing a 6-3-1 isn't necessarily a bad idea, but the way you've got it now isn't too great. For one, for each two port merge, you've got two pipes merging into one pipe of the same diameter. If you really wanted to do it that way, then the pipe after the 2-1 merger should be of a larger diameter.
Another thing that I see here, and what I see on pretty much every turbo manifold I've ever seen on H-T, is horrible wastegate placement. As has been noted, you have your wastegate tube coming out of what should be an inlet to the collector. Talk about crazy reversion in there.
Most turbo manifolds I see here on H-T aren't any better. Almost always, people just cut a hole in the side of the collector, and slap their wastegate tube on there, which is just terribad.
Again, yes, it will work just fine, but if you're spending that much time and money on something, why not try to make it work as well as possible?
Wastegate placement, and exhaust to wastegate flow is important if you want to properly control boost. Where you're going to mount your wastegate and how you're going to route exhaust to it should be one of the absolute first things you consider when you're designing your manifold.
People should do themselves a favor, and do some research on manifold design before tackling a project such as this. The usual book to look for is "Maximum Boost." Yes, it is an older book, but the rules of physics haven't changed since it was written, and the section on manifold design is still very good and very valid.
I'm not trying to be an a$$, just trying to be helpful. I can only say it so many times: what you've got there will most certainly work, I have no doubts at all about that. But if you're going to spend that amount of resources and time on such a lovely project, why not try to maximize the performance potential of the components you have?
Just my 2 cents.
08-25-2009, 06:55 PM
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Re: Top Mount PT6262 M Coupe Turbo Build
Some more progress
Fuel basket with Walbro 255lph hi pressure Intank pump, 6an feed from pump to rail
Oil pan tapped for oil return
Final fuel lines complete, added FP gauge inline
Intercooler mounted
G A M E O V E R
08-30-2009, 01:53 PM
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Re: Top Mount PT6262 M Coupe Turbo Build
More progress from this past week.
We didn't like the original shroud design since we had to cut it to make the WG fit. So here was Shawn's solution.
Notice the SS pipe in place of the factory rubber hose. It is very close to the manifold and we didn't want to have any hose melting issues.
some new hardware added.
oil cooler ( I noticed it sitting in a '91 volvo 740 GLE at a junk yard one day so I snagged it. Oddly enough it was also the same year and model as my first car), power steering cooler and mini 8in perma-cool fan (2100cfm).
cutting the brake ducts and the bumper support so the bumper would fit over the IC.
test fitting...
How about a one-off custom bracket to hold your overflow tank using factory mounting points...
We didn't like the original shroud design since we had to cut it to make the WG fit. So here was Shawn's solution.
Notice the SS pipe in place of the factory rubber hose. It is very close to the manifold and we didn't want to have any hose melting issues.
some new hardware added.
oil cooler ( I noticed it sitting in a '91 volvo 740 GLE at a junk yard one day so I snagged it. Oddly enough it was also the same year and model as my first car), power steering cooler and mini 8in perma-cool fan (2100cfm).
cutting the brake ducts and the bumper support so the bumper would fit over the IC.
test fitting...
How about a one-off custom bracket to hold your overflow tank using factory mounting points...
08-30-2009, 03:54 PM
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Re: Top Mount PT6262 M Coupe Turbo Build
Thank you.
It isn't done quite yet. Still to be fabricated are the supports for the fuel rail ( right now the injectors are holding it in place), we need to weld the water/meth tank closed after I get some anti-slosh foam and the aem w/m kit. And I need to get my muffler and weld on the v-band. Other than that I need to send my tuner the ecu so he can put a base log on it so it's turnkey. Gauges need to be wired up and I need to make a pod out of fiberglass for the a-pillar. Then it's done until I go to the dyno and my tuner perfects everything.
It isn't done quite yet. Still to be fabricated are the supports for the fuel rail ( right now the injectors are holding it in place), we need to weld the water/meth tank closed after I get some anti-slosh foam and the aem w/m kit. And I need to get my muffler and weld on the v-band. Other than that I need to send my tuner the ecu so he can put a base log on it so it's turnkey. Gauges need to be wired up and I need to make a pod out of fiberglass for the a-pillar. Then it's done until I go to the dyno and my tuner perfects everything.
09-10-2009, 11:04 PM
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Re: Top Mount PT6262 M Coupe Turbo Build
I never said anything about the welds. It's comical to me that you judge the quality of my character based on two sentences I've posted. On a public forum you invite public scrutiny to the things you post. That's sort of how it works.
Apart from the fact that I think that whole header is a design flaw, you've got practically zero taper on the collector. That makes for very turbulent flow and higher back pressure. Having the wastegate feed off what should be an inlet to to the collector forces the exhaust gas to make an abrubt, almost 180 degree, turn. Have fun controlling boost with that.
Apart from the fact that I think that whole header is a design flaw, you've got practically zero taper on the collector. That makes for very turbulent flow and higher back pressure. Having the wastegate feed off what should be an inlet to to the collector forces the exhaust gas to make an abrubt, almost 180 degree, turn. Have fun controlling boost with that.
Karl,
while the header is not an ideal design i'm guessing its flaws will not stand in the way of this car making 600+whp...which is probably way more than it'll ever see.
Boost doesn't seem to care about head design ,header design...etc...on most setups that are not pushed to the absolute limit.