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Engine Specific Info and Questions => IDI Engine => Topic started by: TurboJ on October 22, 2012, 02:33:06 am

Title: Down pipe routing on a mk2
Post by: TurboJ on October 22, 2012, 02:33:06 am: I would like some help with my down pipe routing plan.

I would like to be able to fabricate as much of the DP before fitting the engine to the car - that would make many things easier.

The turbo sits like this:

(http://i232.photobucket.com/albums/ee303/TurboJanne/Jetta%20II%20TDIC/Valiaikainen%20yhteiskansio/IMG_2862.jpg)

mk2 people, could you show me pictures of how your DP sits with a turbo location similar to this?
Even a picture with just the engine with a DP attached would help.

Thanks!
Title: Re: Down pipe routing on a mk2
Post by: CRSMP5 on October 22, 2012, 09:32:12 am: sadly you gotta drop it in.. thats not a stock turbo set up in any way... but id say a down pipe like a mk2-aaz would be close.. tdi and newer turbo on botto0m..
Title: Re: Down pipe routing on a mk2
Post by: hillfolk'r on October 22, 2012, 06:20:49 pm: Hey ya may want to plan your routing,so to speak,and only TACK the bends all together
that way when ya probably need to cut it to mod it you dont need to cut the whole pipe up
what size pipe are ya goin? When i made my 2.5 for my old mk1 stock td setup you coud almost throw something in there that would fit.
3 inch took some careful measuring and cutting on the tdi-m tho
mk2s have fair room,make the dp pointing at least to the ground,then do the last bend to go down the tunnel after its in the car.
Title: Re: Down pipe routing on a mk2
Post by: alexgingles on October 23, 2012, 06:23:05 am: what i did on mine.. i used a u-bend coming off the turbo and i cut it at 135º. I then took that addition 45º and flipped it down. If I remember right, I cut it off after that 45º. I then cut like a 80º out of another u-bend and went to the flex pipe. now my exhaust was already at an angle past the downpipe section hence the reason i used an 80º piece. It worked for me to get over the steering rack and subframe with a stock turbo setup. Good luck!

(https://lh4.googleusercontent.com/-4Tu_zrxCXso/TqDkPaIezRI/AAAAAAAAASE/-tsQF-GA69g/s640/picture%2520026.jpg)

(https://lh6.googleusercontent.com/-4WS_Wv7Y830/TqI09GU_ObI/AAAAAAAAAS8/_kvMBdw4dEY/s640/picture%2520027.jpg)

(https://lh6.googleusercontent.com/-dAxeHyZsvGQ/TqI0_iFxBNI/AAAAAAAAAS8/VgBjM-EiPP0/s640/picture%2520028.jpg)
Title: Re: Down pipe routing on a mk2
Post by: alexgingles on October 23, 2012, 06:24:22 am: (https://lh4.googleusercontent.com/-xU2UA8VAf94/TqI1Ai-reJI/AAAAAAAAAS8/thlGSTv-kuc/s640/picture%2520029.jpg)
Title: Re: Down pipe routing on a mk2
Post by: theman53 on October 23, 2012, 06:59:39 am: (http://a2.ec-images.myspacecdn.com/images02/124/e84509bc3bf149c58ffda995cd245eb5/l.jpg)
(http://a2.ec-images.myspacecdn.com/images02/125/236f0bfac8214a3a95d0a90b171e153e/l.jpg)

Not the best pics for you but it is something. Also noting this is 3" all the way so it may looked more cramped than some.
Title: Re: Down pipe routing on a mk2
Post by: TylerDurden on October 23, 2012, 07:58:09 am: Here's the stock DP on a 91 ECO.

(https://lh6.googleusercontent.com/-VqYBXsgfGDY/UIavdhGlMfI/AAAAAAAAAwo/01mZN_AdWU8/s800/IMG_9121-600.jpg)

Outlet center is about same distance from block as the furthest bolt on mount casting in the same horizontal and vertical plane. About 8" from the bolt center.
Title: Re: Down pipe routing on a mk2
Post by: TurboJ on October 23, 2012, 10:18:57 am: Thank you guys, thank you a lot!

This is very helpful. I'll get some measurements of my own done in a while, but now I know the general location of the tunnel
in proportion to the engine block.

Would anyone have a picture where the drive shaft could be clearly seen together with the D/P?
Title: Re: Down pipe routing on a mk2
Post by: R.O.R-2.0 on October 23, 2012, 01:39:14 pm: DP clears axles by a mile.. if you run into axle clearance issues, you put the downpipe in the wrong spot..
Title: Re: Down pipe routing on a mk2
Post by: CRSMP5 on October 23, 2012, 01:45:39 pm: he correct... but bolting tranny to engine will give idea due to axle flange... axle is more important on a mk1 vs mk2-3... has to fit between axle/rack... later cars the down piipe runs between rack and firewall..
Title: Re: Down pipe routing on a mk2
Post by: R.O.R-2.0 on October 23, 2012, 01:50:02 pm: Quote from: CRSMP5 on October 23, 2012, 01:45:39 pm
he correct... but bolting tranny to engine will give idea due to axle flange... axle is more important on a mk1 vs mk2-3... has to fit between axle/rack... later cars the down piipe runs between rack and firewall..

but he asks about routing on a MK2 car.. so, if his DP hits the axles, he did it wrong ;D
Title: Re: Down pipe routing on a mk2
Post by: theman53 on October 23, 2012, 02:57:53 pm: You can see in alexgingles in car pic and mine out of car the axle relationship. It is a good 6" above the axle and probably close to that further toward the car than the axle.
In my pic the rear engine mount you can kind of guess how far it is from where the axle to DP would be.
Title: Re: Down pipe routing on a mk2
Post by: R.O.R-2.0 on October 23, 2012, 04:03:33 pm: Quote from: theman53 on October 23, 2012, 02:57:53 pm
You can see in alexgingles in car pic and mine out of car the axle relationship. It is a good 6" above the axle and probably close to that further toward the car than the axle.
In my pic the rear engine mount you can kind of guess how far it is from where the axle to DP would be.

on my car, there is more likelihood for the axle to hit the engine mount, rather than the downpipe..