M35 Turbo Suction Pipe

[scotty nm35]

I pulled the intake off today and tried to imagine how I am going to fab a new suction pipe for the turbo. Its very tight in there and the bolts will be a bugger to get to but its definitely possible to enlarge it. I think this is the major bottleneck of the intake causing the lower than expected output. While there I will enlarge the AFM to reduce the voltage getting to the ECU. Hopefully this will allow full airflow measurement without clamping the voltage.

At least part of the pipe has to be silicone for engine movement so I guess theres not much to make really. I just wish I had a spare engine to work with, I dont like stripping mine all the time. Anybody have a VQ25det laying around?

[andy65b]

  scotty nm35 said:

I pulled the intake off today and tried to imagine how I am going to fab a new suction pipe for the turbo. Its very tight in there and the bolts will be a bugger to get to but its definitely possible to enlarge it. I think this is the major bottleneck of the intake causing the lower than expected output. While there I will enlarge the AFM to reduce the voltage getting to the ECU. Hopefully this will allow full airflow measurement without clamping the voltage.

At least part of the pipe has to be silicone for engine movement so I guess theres not much to make really. I just wish I had a spare engine to work with, I dont like stripping mine all the time. Anybody have a VQ25det laying around?

There is a the damaged M35 at Pickles for sale. You can buy that then part it out. Apparently only expecting 4-5k. LOL

Cheers

Andy

[Angus Smart]

I think its up tomorrow.. or friday.

my brothers on holidays so i cant quiet find out what the insurance company has on it..

But going on history (that black one) i guess it would be around that mark..

[iamhe77]

Can you wait until the end of the month/start of next month Scotty?

Have something in the works... ay Iain?

[scotty nm35]

  iamhe77 said:

Can you wait until the end of the month/start of next month Scotty?

Have something in the works... ay Iain?

Are you holding back on me? And I thought we were mates...

What are you planning???

Sneaky bugger.

[iamhe77]

  scotty nm35 said:

Are you holding back on me? And I thought we were mates...

What are you planning???

Sneaky bugger.

You'll see it first mate, don't worry.

Edited October 1, 2009 by iamhe77

[zei20l]

*nods*

yup!

[scotty nm35]

Finally finished. What a bugger of a job to make.

I had to fit and refit about 30 times, and its not fun to get in there.

I have to tune now, I may end up buying a wideband and gauge as dyno tunes are just too expensive.

[iamhe77]

Interesting.... see you soon.

You may have to price this out mate, I have a feeling that you will have a few orders

[[[d a n n y]]]

+2 im in too

[andy65b]

Great work Scotty.

[zei20l]

for the right price..............

will you have a flange for the BOV plumb back??

[scotty nm35]

The price will be right, I just have to sort out a small airflow sensor issue.

The car is idling very low, like 550 to 600, which is nice but occasionally it stalls pulling up to an intersection. Im guessing it could be tuned out but some of you cant so I would like it to work on a standard car and have the air fuel ratio checked before I can be sure theyre ok.

The turbo flange has a nice funnel from 58mm out to 70mm id for the rest (3inch pipe.) I will also have to insulate them with exhaust wrap as mine is only 10mm from the ex manifold. Its a tight fit, no going bigger thats for sure.

[scotty nm35]

The ECU seems to be sorting itself out. No stalling today. Hopefully just rotating the airflow sensor a bit did the trick.

Definitely heaps more go but it still needs a tune.

[iamhe77]

  scotty nm35 said:

The ECU seems to be sorting itself out. No stalling today. Hopefully just rotating the airflow sensor a bit did the trick.

Definitely heaps more go but it still needs a tune.

Yeah. I could actually feel the power this time instead of just watching the speedo go crazy

[StageaM35]

  scotty nm35 said:

The turbo flange has a nice funnel from 58mm out to 70mm id for the rest (3inch pipe.) I will also have to insulate them with exhaust wrap as mine is only 10mm from the ex manifold. Its a tight fit, no going bigger thats for sure.

Is the turbo inlet flange something you can buy off the shelf or do you make it yourself? I know the exhaust flange is a T3. The opening size of the inlet is about 58mm for your turbo? Would be a bit smaller on a standard turbo? Not much room to allow for the bolts to fit through the holes once a seam is welded around the pipe to the flange.

Is it hard to unbolt the standard suction pipe from the turbo? Can't even see the bottom one .

Cheers for all your info

Rhys

[scotty nm35]

Not much room for anything down there... especially 3 inch pipe. Every part is custom, the turbo flange and funnel are from one piece of alloy, 100mm round by 50mm then machined on the lathe. it has to be 50mm to clear the stud (but the nut still has to be installed first or you cant get it on.) and the nut is done from underneath. PITA.

Standard turbo inlet would be 48mm or so I think

[StageaM35]

Thanks again!

Will have a go at pulling out the the stock pipes to see what you mean by tight fit .

Edited November 26, 2009 by StageaM35