Tubular manifold

[TRACKMKIII]

Does anyone make a Tubular Exhuast manifold the fits the CT-26. I have used the search feature and I have only found people posting about how much of a bad idea it is and why it is not a worthwhile upgrade unless you plan on sticking with the stock CT-26 or a upgraded CT-26 based turbo. Well that is exactly what I plan to do. I want a .57 CT-26 and my power goal is a really responsive 350-400hp. Yes I know that people have made 400+ hp on a stock or ported manifold, but I just don't see a stock manifold being as effective as a tubular piece. While searching around I heard rumors of some vendors being in the process of making one but I am not sure if anything ever became of those rumors. Anyway any info would be great!! Thanks in advance!!

 

[Red7m]

Well if you can weld or know someone or a shop that can, and if you are pretty set on it. You could always get one of the ss autochrome or ebay ones and change the flange over to a ct-26 one and run an external gate. That is what I was going to do because I wanted to see what I could do with a stock ct-26 but I just purchased a greddy 20g bolt-on that I could not pass up.

Also I remember seeing in dsmtuners a turbo dyno comparision thread where a shop was comparing turbo's to show people what the diferent turbo's where capable of. In one for the evoIII16g they compared a SBR cast mani to a SBR tubular one. Below is the post I am talking about. IMO if the price is right I think that a tubular manifold will be worth it even for a ct-26.

Quote:
Originally Posted by Slowboy
We had only linited time today to get the test done, we had a few dyno appointments. We did manage to spend some time with the MHI Evo III turbo however, notice on the 15 PSI graph the boost crept from 15 to 20 psi.... the opposite problem we have been having! This was an unported turbo with no 34 mm flapper to help control boost creep. It was only an issue when we tried to run less than 20 psi however.

15 PSI: 290 ft/lbs 344 WHP (crept to 20 PSI)
20 PSI: 344 ft/lbs 344 WHP
25 PSI: 400 ft/lbs 375 WHP
30 PSI: 436 ft/lbs 397 WHP (fell to 23 PSI at redline)

We can easily make 400 WHP if we wanted to run more timing, or if we were on our old 2.3l motor we liked to beat on back in the day! We will have this turbo back on once we go external as well.

http://www.slowboyracing.com/downloads/dyno graphs/E16G 15-20-25-30psi.JPG

http://www.slowboyracing.com/downloads/dyno graphs/E16G Boost Graph.JPG

Mike Huml

So, lately we have seen a lot of post on Tuners and other forums about tubular manifolds, so we decided to do a little testing of our own! It is a well accepted theory that a properly designed tubular exhaust manifold will pick up torque, and possibly make a few more WHP along the way.

So, we decided to install the SBR tubular manifold, and give it the SBR port job that this turbo deserved in the beginning.

Here is the note that was in my email from Nathan, (our tuner) so you can easily understand the graphs I am about to post:

"The third graph posted is a screen capture from the Haltech datalogger. It shows MAP pressure vs. intake temp. Much to our suprise, even at this boost pressure, the 16G didn't turn into a hairdryer. As you can see at the beginning of the run IAT is at a cool 20*C, about 68*F. As boost comes on, IAT rises to a peak of 27*, or 80.6*F. This is VERY good for an IAT, especially for a small turbo. Its not uncommon to see 140* temps on big boost passes on a small intercooler.

The IAT sensor is positioned right infront of the throttle body in the TB elbow.
Unfortunetly, we dont have an IAT before the IC for a temperature differential, but the hot side endtank is blazing after each pass, almost burns you to touch it, however the outlet cold side stays right around 80*. Pretty efficient setup eh?

Nate
SBR"

http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/E316G Tubular.JPG

http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/E316G Tubular vs. Cast.JPG

http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/Air Temp vs MAP.jpg

Maybe we should start a new thread to discuss this? Who wants us to throw some nitrous on this little MHI and see what its made of.... hehe.... :rocks:

Mike Huml

 

[dok33]

You could get one of the SSAC manifolds and get an adapter to go from T4 to CT26 if anyone makes 'em (check with MDC). Sounds like you've heard it, but not worth the effort IMHO. Stock manifold will flow plenty for an upgraded CT, if you want more flow port the stock mani or get it extrude honed.

edit-ignore me, I'm too slow at posting and have been beaten to the punch

 

[starscream5000]

Gregg from suprasport was going to make one for his BOSS turbo, which is a bolt-on to the stock manifold, so the CT-26 should fit that one.

Email him about the status on that.

 

[MRSUPRA]

Still a wasted effort.. You will get huge gains with an aftermarket turbo on the stock manifold, but not much gain at all with a stock turbo on an aftermarket manifold. Not to mention you will lose response with a tubular manifold.

 

[WhtMa71]

I think someone should make a log style tube manifold for the ct26. Would be cheap,better than the tiny little ports on the stock manifold,wouldnt lose responce,would weigh less,etc..And they could have the option to get it coated. Id probably run one of those with an upgraded ct26 4-sho. I might actually get some tubing and a few flanges and see if i can fab up one with the ol' mig lol.