How much do you think I'll be limiting my power if I go with the 2.5' down pipes rather than the 3" down pipes. Supposedly with the 3" I'm supposed to be able to hit my target which is 800-1000. I'm just worried I might lose to much be going to a 2.5".

 

Why do you want to go with 2.5" pipes instead of 3", easier to package?

Not only would it reduce the overall potential of the engine, but it would also probably lead to slower spool up of the turbo's due to the increased back pressure on the turbine. I would recommend going with the pipe size that corresponds to the diameter of the turbine housing outlet.

 

Packaging is right. I'm trying to salvage my A/C and it's going to be close. My exhaust guy hasn't looked at it yet, but when I look at it I think to my self..... there's no way I'm getting this through there........It's also real close on my master cylinder side. I would much rather go 3" but I'm not sure its going to make it. Any suggestions........

 

You could maybe think about routing exhaust through the inner fenders. Somebody did that with a '66 Mustang TT in HOT ROD a couple of months ago. You could also think about running cutouts so that you could make up for the power loss from the 2.5 pipe when your at the track.

 

LIL QIK, I think you should ditch the a/c, and ditch the power brakes. Save some weight, and make room for the bigger pipes. . I can post some pics of a manual brake setup looks like if you want. It and an a/c delete box realy cleans it up under the hood too.Just my o2

 

i'd like to see your pic of manual brakes please

 

I might look odd but you could split the 3" pipe to two 2.25" pipes on each side. They will have 12% more area than the 3" pipe. It might be easier to route two narrow pipes than one big. When you get past the narrow part you could join them to one 3" pipe on each side again.

edit:

One 2.25" and one 2" pipe will have almost exactly the same area as a 3" pipe.

 

Your right that does sound odd............and makes sense. I'll bring it up to him if he tells me he can't slip a 3" through there. Thanks.

 

You should give a call to Specialty Products Design (888)778-3312, they are one of the leading suppliers of exhaust fabircation components. They have several styles of merge collectors, including 2 into 1, you could use one of their 3" into 2.5" collectors right off of the turbo, and then run 2 2.5" pipes back into another 3" to 2.5" 2 into 1 collector, with 3" exhaust all the way back. They have them in 3.5" as well, if you can/want to go that big.

We are sourcing all of the material to build my twin turbo headers, exhaust, cold air intake, and intercooler plumbing from them. They offer their products in mild steel, aluminized steel, 304 stainless, 321 stainless (what I'm using), Inconel, and 6061 aluminum.

 

That sounds like it's going to be a huge help......I Appreciate it Monty.......:hail:

 

Monty, how is your car getting along??? Any progress pics??

Marck

 

It's coming along. They've had it for about 3 weeks now, but only started working on it last weekend. TRZ does alot of cars for the 'street legal' NMCA/NSCA/NMRA guys, so they are really busy right now trying to get all their customers race cars ready for them before the season starts. It sucks for me, but I can understand the prioritization. My cars just a street car, it's not like I'm gonna be chasing a championship the whole season or anything.

We ran into one snag because the header flanges that SPD sent them for the Dart 18* heads were for a different 18* head style. So they made a template and faxed it to them, and the new flanges don't come in until today or tomorrow.

The shop is about an hour away, so I haven't gone down there yet for any 'in progress' shots. I plan to next week though. He's still telling me it will only take another 2-3 weeks, so hopefully he's right. If so, I should be back on the road by the end of March.

What about your twin turbo setup?

 

LIL QIK, How about using oval tubing. http://www.spintechmufflers.com/spintech/index.asp
These guys have the transitions and tubing to make it possible. It should be cheaper than buying all those merge collectors, and the oval tubing looks real good when done right. http://www.burnsstainless.com/ these guys also have good stuff. hope that helps, Don B.

 

The setup is coming along nicely, gonna install 2 filters in the oil lines just to be sure. Also am looking at installing a weldon electric pump for oiling after shutdown or maybe a moroso accumulator but I don't like the manual operation and how long does the 3 quart one supply oil??

Also what is the moroso accusump?? I have heard of it but forgot what it is...do you know???

Also are you going to install a BOV??? I think I'm gonna get one (or 2) from AMW (where I got my setup from) http://wwnet.fi/amworks

I'm also probably gonna buy the intercoolers from the guy you gave me the addy from...thanx a lot for that, they're realy nice units.

You're way ahead of me though, going to hardblock my engine, install splayed caps, eagle crank, rods....the works..only one drawback...I need to pull a bankheist again

Good luck with your setup

Marck

 

Thanks BlownBird, I forgot about Spintech. It's just nice having a few more options now...Thanks guys.

 

Marck,

A BOV is being installed on one of the intercooler end tanks.

Glad the intercoolers are going to work for you. I was going to get them, but we'd already gotten the ontercooler form Spearco. Those carbon fiber end tanks are trick!

Those inline filters are probably good insurance, but they are typically higher micron than your engine oil filter.

 

I found some turbo charger filters in england. The tommys are expensive though, damn they know about pricing. Replace $ w/ pund sign and that's it!
The Weldon pump is more expensive in england than in the us and they're even made in england.. duh!

Why are you installing the BOV in the intercooler thank? They work best as close to the TB as possible. However on the output side of the intercooler will probably work just fine, the guy doing it for you knows this stuff better than I, I'm certain about that.

I'm thinking about doing it where I will have the 2 pipes from the intercoolers merge (balance) and then split again, that way I'll only need 1. Too much plumbing going on already. Also it eliminates problems w/ them not opening the same time.

What mm BOV are you going to use?

Marck