Re: Going from a single turbo to twins
 

Nice build, looks like fun and a challenge - good luck.

Regarding the catch cans. We're running a single AllStar Perf., that is about identical to the Moroso's you bought, and a check valved PCV. The catch can is piped to a JY electric emissions pump that I reversed the direction of. It turns on when in boost and runs for 5 seconds after out of boost. We ran it all summer for more than 5000 miles with no issues, no oil in the intake and no engine oil leaks. I'm triggering the pump via an MS2, but the same exact thing could be accomplishished with a simple/low budget Hobbs switch and relay. We haven't drained a pint of oil out of it total after a full season of driving. Most of the summer was at 10 psi and we turned it up to 14 psi for the last part of the season.

My two cents, throw them out if needed - lol. Good luck - Jim

Re: Going from a single turbo to twins
 

Yeah pretty much the same thing.

Re: Going from a single turbo to twins
 

Thanks I will keep that in mind.

Re: Going from a single turbo to twins
 

Not much to report past two days. Still trying to figure out what ill do for down pipes. Either fender exits or under the k member by the control arms..........

Re: Going from a single turbo to twins
 

Think I have my upper radiator hose figured out.

Re: Going from a single turbo to twins
 

That's still close..

-- Joe

Re: Going from a single turbo to twins
 

That's plenty of space especially if the exhaust is wrapped

Any new ideas on your downpipes?

Re: Going from a single turbo to twins
 

Going to be going the fender exhaust route after looking at every possible thing today. Going to be coming out at the lower chin spoiler on the sides of the fender. I have no other choice and since the car isn't my daily driver I'm content with that.

Re: Going from a single turbo to twins
 

Once all the exhaust is done and all welded up it will be coming off and sent out to be coated.

Re: Going from a single turbo to twins
 

I think the hose will be ok. You might want to look for a silicone version of the one you have. Only because it will last a lot longer when exposed to heat. OEM rubber is only good till like 300* or something… silicone is good for like 450+*

Re: Going from a single turbo to twins
 

I will keep an eye out for one. Not sure I will be able to find one. If anyone happens to come across one please let me know. Thank you

Re: Going from a single turbo to twins
 

I received my flanges and clamps today. For now I have only tacked on the start of the down pipes. Waiting for my fans before I finish welding the first half up.

Re: Going from a single turbo to twins
 

Mines closer and has been fine. Its autozone type universial hose with the spiral wire core

Re: Going from a single turbo to twins
 

As long as it works . As for the exhaust I will have to see how loud it is. I don't think it will be too loud with the .68 a/r exhaust housings.

Re: Going from a single turbo to twins
 

Idk your hose application. But look up the make/model and see what's out there for silicone hose applications. I think you would be fine if you coat or wrap the bend.

Those bump pipes look real lose to the rad. I would wait for the fans before going any further remember the fans at the motor are like 4.5" deep so around the fan blade supports is probably like 3.5" from the rad surface if you mount it that close.

Re: Going from a single turbo to twins
 

Yeah , that it the plan with the down pipes. The fans will be in today and once I get home I can put those in place and see exactly where I need to route the piping.

Re: Going from a single turbo to twins
 

I have the cooling fans in place and the first part of the down pipes tacked up

Re: Going from a single turbo to twins
 

Here is the other side. It looks closer than what you see here but it's fine.

Re: Going from a single turbo to twins
 

have you considered running the DPs like this?

you will have to dodge the fans obviously and I just show a straight shot, but if you merge the two 3" pipes into a 5 (or 4), then reduce down to 4" when you have to duck under the heater box and header it should fit no problem.

Attachment 322688

Re: Going from a single turbo to twins
 

Yes I have but I don't want to create a restriction by merging the two 3" pipes to a single 3". Then out to the 4" cat back. I don't have room for a 4" pipe in the engine bay either.

Re: Going from a single turbo to twins
 

Are your headers in the way of the 4"?

I was under th impression that the only tight spot with a 4" dp is by the a/c box and you just run the heater box

This is a 3" pipe going under a modified a/c box, surely a 4" could squeeze in there?

Attachment 322687

Re: Going from a single turbo to twins
 

Where you able to test the fans and see how much air they pull? They look pretty decent.

Fender exhaust exits would be interesting lol… but loud even with the turbos. Not to mention any cop could give you a ticket for not running exhaust to the rear bumper. They got me for that, as well as being too "loud" by issuing a noise complaint at a check point. That happened a few times lol. I would get sick of the sound bouncing off everything and kicking right into your ears/face. I had turndowns before the axle and the sound kicking back off dividers would get old real quick lol and those turndowns were behind me. I think the turbos do a good job of killing the noise but its still not going to be fun with them in the fenders.

No way to do a dual 3" into a 4" and run it back? I run one now for my 4" catback and the flow difference isn't really noticeable, its very close in CFM but the 4" wins in the "less surface friction" so its basically even. The only issue with the 4" flowmaster merge is the length. But it can be shortened a lot.

Re: Going from a single turbo to twins
 

Unfortunately I do not have room along the sub frame near the header to run that size of a pipe. I might be able to get away with 3.5 " but that's pushing it too. I still want to access my spark plugs if need be as well as replace a blown out header gasket easily if I have to. My heater box is modified as well but I would rather the extra room.

Re: Going from a single turbo to twins
 

I have not tested the fans yet but I've read a lot of people are using them with good luck.

As for the fender exits and the police as much as I drive my car I'm not worried too much about it. I have a few good "friends" so if something does happen I am all set.

No room to run dual 3" to a 4" merge either. I would've been better off doing a 2.5" dual to a 4" merge but I did not feel like sending back the 3" tubing kit that I bought from www.mandrelbends.com with an extra 10% off.

So I just sucked it up and decided to deal with using the 3" tubing as well as purchasing two Vibrant resonators to help cut down the sound. I don't think it will be too loud anyways especially with the .68 exh ar on the turbos.

Re: Going from a single turbo to twins
 

I'll post a few pictures of the driver side almost done.

Re: Going from a single turbo to twins
 

Another

Re: Going from a single turbo to twins
 

Just have to trim a little off and install the waste gate and the the driver side is finished.

Re: Going from a single turbo to twins
 

Looks good!

Re: Going from a single turbo to twins
 

That's gonna be loud. :)

-- Joe

Re: Going from a single turbo to twins
 

We will find out when the time comes lol

Re: Going from a single turbo to twins
 

Depends on the state. I work in Mass and it's pretty strict. I can cite you for using an autozone replacement muffler if it's louder than stock.

In New Hampshire where I live, you can run side pipes that exit before the rear axle, as long as heat shields are in place. You still need a proper muffler, but the state understands the difference between a high HP muscle car, and an idiot who cut his exhaust off to be cool.



-- Joe

Re: Going from a single turbo to twins
 

Yeah...Mass is pretty strict.

Re: Going from a single turbo to twins
 

Not much progress this week . Have too much going on so I've been busy. I did manage to get the waste gates in place where I want them. I put them up front so I can remove the down pipes if necessary.

Re: Going from a single turbo to twins
 

Hey, hey, hey, do you still consider them idiots if the exhaust wasn't there whenthey bought the car - hehe. It's more fun if it dumps before the rear axle anyway ;)

Re: Going from a single turbo to twins
 

Have you considered running 4" oval pipe. Obviously it doesn't have the flow capacity of 4" but it should surpass 3.5" and if memoryserves me correctly, it is only 3" on the short dimension.

Re: Going from a single turbo to twins
 

Yeah I have thought about it but it would still be a pita. If I think it's too loud then I will do something about bringing the exhaust back to the rear of the car. Time will tell with this one anyways. i could always do two 2.5" down pipes and merge it into the 4". I'll know more come spring time when I can actually drive the car.

Re: Going from a single turbo to twins
 

Guys with stock cars and very loud exhaust drive me nuts.

I get it if you have a 500+ hp car, and a reasonable exhaust tone.

But if you have a 150hp crap box and it's pushing 150 decibels you should be executed :)

-- Joe

Re: Going from a single turbo to twins
 

:lmao::lmao::lmao::lmao:

Re: Going from a single turbo to twins
 

Thats $$$$

Re: Going from a single turbo to twins
 

Indeed it is

Re: Going from a single turbo to twins
 

Coming along great! I wouldnt worry much about the upper rad hose. just double or triple wrap that section. I have seen turbine hosings closer to a rad that that.

Jay

Re: Going from a single turbo to twins
 

Thanks. I plan on having the hot side coated once finished. On another note I managed to get the driver side all finished and half of the passenger side done before I ran out of mig welding wire. Thank god I have a spare roll at work that I will grab tomorrow.

The next part will be a pita as well....running the cold side.

Re: Going from a single turbo to twins
 

Here's another view.

Re: Going from a single turbo to twins
 

Loaded up the welder with a roll of new wire. Hot side is now finished. Now to take everything off and send it out to be coated. Then work on the cold side. With I could run 14 psi with no intercooler or meth.

Re: Going from a single turbo to twins
 

Welding over oil stained cardboard?

-- Joe

Re: Going from a single turbo to twins
 

Lol I was waiting for someone to comment about that.. Yeah its old card board that has been soaked in water before it went under the car. no chance of it going up in flames even though I only tacked in the pieces and took them off and up to the front of the garage to weld them together.

Re: Going from a single turbo to twins
 

Choices. Methanol or intercooler........

Re: Going from a single turbo to twins
 

Intercooler. Turbos generate a lot of heat.

-- Joe

Re: Going from a single turbo to twins
 

I have one here but may need to sell it to get a different one . The one I'm looking at online has two inlets and one outlet. The outlet exits the middle of the unit.

Re: Going from a single turbo to twins
 

Why not run two atw cores ? A lot of new OEM cars are moving to ATW intercoolers. Much higher cooling efficiency.

-- Joe