Inlet Runners for a 3.0L conversion
I'll post the steps I used in building the new inlet runners. It may be useful to others wanting to do the same thing, particularly if you only have home workshop tools and can do a bit of basic welding.
David
David
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- 41mm ID exhaust pipe, mandrel bent to keep ID through the bend. Bend is 35 degrees.
- I1.JPG (19.24 KiB) Viewed 9366 times
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- Chisel out the remaining bit. Not as hard as it looks as the flanges are brazed to the pipe and comes away quite easily. The bronze is also easy to grind out to take the larger pipe.
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- Cut the flanges off the original runners. Leave a bit of pipe sticking out to get the chisel behind.
- F1.JPG (10.57 KiB) Viewed 9366 times
Last edited by David on Tue Dec 21, 2004 11:22 pm, edited 1 time in total.
1985 GTV6 3.0 Zender Body Kit - Red
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- Press fit them into the flanges.
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- I made up a small jig to get the angle right,
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- Cutting the correct length and angle was the hardest part.
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1985 GTV6 3.0 Zender Body Kit - Red
Steve,
The best you can get from the 2.5 plenum is 39-40mm, which I still think is enough for a stock 3.0L. The "flange" inside the original 3.0L runners is actually close to the ID of the 2.5 reamed out runners.
I used a good quality USA straight edge "reamer", not sure what they're called but they rip out the alloy quickly. I also used this to ream out the inlet flanges. The attached photo shows the 2.5 plenum and the tool.
David
The best you can get from the 2.5 plenum is 39-40mm, which I still think is enough for a stock 3.0L. The "flange" inside the original 3.0L runners is actually close to the ID of the 2.5 reamed out runners.
I used a good quality USA straight edge "reamer", not sure what they're called but they rip out the alloy quickly. I also used this to ream out the inlet flanges. The attached photo shows the 2.5 plenum and the tool.
David
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- PL1.JPG (16.41 KiB) Viewed 9303 times
1985 GTV6 3.0 Zender Body Kit - Red
David,good stuff mate! You might want to contact Patrick Centurion in Sydney.He might be keen on a set from you.He`s fitting a 166 motor into his gtv..Will mail you his contact.
Barry
Barry
French cars are shit and shit expensive to service and bloody awful and unreliable and expensive and friends don't let friends drive french cars and you wait years for parts.
Great stuff David!
So the 2.5 plenum has a limit of about 41mm id? Will it limit the flow a lot if mounting 45mm id runners and only using a 41mm plenum opening?
On my 164 3.0QV plenum I´m using the runners are 45mm id and openings in the plenum to match. Should be prutty good then huh?
So the 2.5 plenum has a limit of about 41mm id? Will it limit the flow a lot if mounting 45mm id runners and only using a 41mm plenum opening?
On my 164 3.0QV plenum I´m using the runners are 45mm id and openings in the plenum to match. Should be prutty good then huh?
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- The plenum has been modified to work in the GTV6. Cut off a bit and with a 180 bend to go with it...,
- Sebbans plenum kopia1.JPG (71.97 KiB) Viewed 9292 times
Proud member of Team Rauk Race.
156 V6 24v -98
GTV6 3.0QV-83
75 3.0 Race Car "The raukster"
156 V6 24v -98
GTV6 3.0QV-83
75 3.0 Race Car "The raukster"