id like to see some pics to see how everyones doing them. I was doing my turbo kit today, when I got to the merge pipe i just couldnt figure out how to get 2, 3" pipes to fit a t3 flange.
For a crossover, I use 2.5in tubing merged into the turbo flange. Most of us run single T4 or T6 based turbo's....T3 based turbo would be too small unless you are using em for a twin set up.....i'd think.
For a crossover, I use 2.5in tubing merged into the turbo flange. Most of us run single T4 or T6 based turbo's....T3 based turbo would be too small unless you are using em for a twin set up.....i'd think.
it a master power t70, im assuming its a t3/t4 flange I had one laying around that is a t3 and fits the turbo
exhaust housing size is Exducer Diameter 91.0
intake 101.7mm
Last edited by brandon1566; 08-31-2009 at 08:23 PM..
I also had a MPT 70, it was a T4 flange.... .96a/r
Why are you using 3.0 tubing for a crossover? 2.5 is plenty.
Progress pics of my MPT76 Front Mount 01 SS.
There is a decent merge in this post, I prefer to cut the tubing a bit tighter on both sides and slip it into the flange. Then I hammer form it with heat, vise and a hammer....also a nice block of wood helps form the corners just right. Fit it to the flange and finish weld it.
I also had a MPT 70, it was a T4 flange.... .96a/r
Why are you using 3.0 tubing for a crossover? 2.5 is plenty.
Progress pics of my MPT76 Front Mount 01 SS.
There is a decent merge in this post, I prefer to cut the tubing a bit tighter on both sides and slip it into the flange. Then I hammer form it with heat, vise and a hammer....also a nice block of wood helps form the corners just right. Fit it to the flange and finish weld it.
J
honestly its because I had alot of 3 inch mandrel laying around. I'm trying to keep the build on somewhat of a budget. Im pretty sure it will fit the flange im just trying to get some diff idea's on what everyone is doing.
2.5" crossovers will support a LOT of power, I had the same idea to use 3" for a crosover but changed my mind when guys with single digit 1/4 mile cars told me they were running 2.5"
Here's a pic of mine, I used the food color trick to get the angle right.
Its a T4 flange though.
__________________ 99 WS6 T/A M6:Single 76mm Garrett S trim, Stock ls1 with a TR224 cam, & MadMan suspended. Best ET 10.70 @ 133.47 on 93 octane, no meth, on 275 drag raidials My DIY turbo build
__________________ 2001 CAMARO SS...346CI with a large frame
2001 TRANS AM WS6...Turbo in progress
2005 YAMAHA YZF-R1...Stock
2003 KAWASAKI ZX6RR...Stunter
__________________ 1994 Z28 A4 Bolt-Ons/4.10s SOLD 2001 SS A4/M6 Bolt-Ons,4000stall,231/237 592/603 111.5, Moser 9" 4.30s SOLD 1993 Z28 M6 Full Bolt Ons/ 3.73s SOLD 1998 SS A4 Single T70 Turbo http://www.ls1tech.com/forums/forced...old-build.html
2.5" crossovers will support a LOT of power, I had the same idea to use 3" for a crosover but changed my mind when guys with single digit 1/4 mile cars told me they were running 2.5"
Here's a pic of mine, I used the food color trick to get the angle right.
Its a T4 flange though.
__________________ 1999 Pewter T/A | Just another slow drag radial car (see here) Virginia Speed 366ci LS2 + big turbo (the little block that could) | 7.99 @ 177.8 (1.36)
Virginia Speed 388ci LS2 + bigger turbo | In Progress
Special Thanks to TheOutlaw1, Phil99vette, Shawn @ Va Speed and MADMAN for all their help
Its a very handy trick to know, I've used it more than once building stuff for other people. Its also a really good way to make a turndown tip out of a 90 or 45*
__________________ 99 WS6 T/A M6:Single 76mm Garrett S trim, Stock ls1 with a TR224 cam, & MadMan suspended. Best ET 10.70 @ 133.47 on 93 octane, no meth, on 275 drag raidials My DIY turbo build
lets see those merge pipe pics 
| In Progress
