Contour Enthusiasts Group Archives Forums Modifications Forced Induction I'm LIVID ... the saga begins!!!

hahaha LMAO.

Here is a teaser:



T3/T4 TO4E "o" trim
.70 A/R V-Band Turbine Housing
.50 A/R Compressor Housing

Needless to say, I mutilated the threads on on the other turbo housing trying to drill out the sheared off bolt ... grade 9.8 bolts will do that to you without a drill press. No big deal though since I will be getting another turbine housing for it for about $45 shipped. I however couldn't pass up this turbo for the great deal that I got on it. Yes, it's an eBay special, but for $305 shipped, I couldn't pass it up. The V-Band is the key though as the downpipe that I have designed is based on it

Nice, a dual scroll turbine.

You may want to revise your piping based upon it by feeding both bank pipes right up into the turbo flange, sort of like how the stock y-pipe fed two pipes together into the flange.
Then again it may not matter.

Wouldn't that complicate piping design a bit in the sense that each bank would have to be matched about perfect. A 'normal' uppipe would be better IMHO, especially for duplication for some what mass production later on.

Not really.
The pipe length after the initial collector for one bank is already long enough that tuning at that point isn't an issue. Tuning lengths with turbos is really not a big deal anyway. You can just run two smaller diameter pipes right up to the housings. Supposedly for four cylinder engines the dual scroll really helps out because it keeps a jet of exhaust hitting the turbine wheel directly the whole time rather than having negative pulses on the whole stream. Something like that IIRC.

Anyway, the flow in the pipes on our engine is long enough that it is already fully developed, there are 3 cylinders on each bank, so that also may make it irrelevant.
So not a big deal at all, I was just wondering IF it would help, it definitely won't hurt.

Not trying to add to the complexity here, but a good idea none-the-less. Maybe on the Cougar when the time comes, but considering this turbo will be for the Cougar and is only going on the Contour for kit fitment (same footprint as the other unit), that is an option that I will have for the Cougar. I have piping on the way, so I should have some pics soon of my tacked up/down pipe ... still deciding if I want to share these before deciding on producing the kit ... hmmm ....

Since you've got a split turbine housing you might as well have the engine banks seperated.

I also thought about the split design and like I said, I'm going to pass on it this time round. It will take a lot more than just slap two pipes up and what not. Exhaust pulse timing on seperated banks should probably be more of a first thought than an afterthought

I'm going to be using an "un tanged" flange on the turbo side (no split in the flange - completely open standard T4 flange). Do you think that there would be any draw back to knife edging the wall between the two ports on the turbine housing? I know for flow seperation, this would be ideal, but my only hesitation would be the edge getting too hot due to it being thinner and possibly deforming. Then I began to think why not knife edge and then ceramic coat ... your thoughts/suggestions are always welcome!