Hmmm.... let's go back and read the first post.
Manifold: divided & setup up for twin scroll setup

The header was built for a twin scroll setup. After it was built Tim decided to experiment with turbo hot sides.

 

In the first post:

"Custom header with dived runners (for twin scroll)"

 

If someone wants to send me a twin scroll 35R kit I will do a no bull-shi* back to back test and even make a video. I'll do it on my car with nothing else changing but the turbo kit.

I do think a twin scroll would spool a little bit faster (maybe 100-200 rpms?) but it will give up power up top. Even in slow & tight type of road racing I've seen no issues with spool up using 2.0L 30R, or a 2.3L 35R... power comes on quickly, enough to overpower traction if you want it to.

 

I can't comment on the particulars of this test because I wasn't there and I don't know all the variables. What I can say however is the .85 A/R (TS) housing is not the one I would have selected if peak power was the goal.

I can comment thoroughly however on two first-hand experiences I have with open vs TS. In my observations in both cases with actually driving the two different setups, there is absolutely no comparison in the response and feel between the two different configurations. The open setup feels dead until it (finally) comes on boost. The TS setup is far more linear - feels very willing and torquey before the turbo hits. There are things a dyno (especially an inertia dyno) just can't reveal, but are readily apparent from the driver's seat.

 

100% agreed.
simply changing a/r can make 30hp. single to single scroll

 

Gettin' hot in here. Has flame suit on and pop corn ready. Anybody have some of the Butter-Flavered topping?

 

It's not going to happen.

When smart people discuss new topics the results is usually good.

Scorke

 

While this can be true, it will make that power at the sacrifice of SPOOL. Check the dyno chart and you will see that the TS and the OS spooled nearly identically.

Had we changed to an OS AR that made the same peak power as the TS (read: smaller more restrictive AR for better spool), you would have seen much more power under the curve than the TS.

 

It's funny how both of my setups also showed roughly the same thing when looking at the spool curve on a dyno chart. However . . .

When the cars were put on the street, the difference in off-boost torque and transient response was night and day. In fact, the difference is so vivid that I can't see ever going back to an open housing. It's a rather stark example of the fact that dynos cannot reveal much beyond what happens at 100% throttle with a static load, neither of which are representative of real world conditions and use.

 

and this is why I keep asking for the dynograph to be shown in time as the x-axis and not rpm...see the response time of the turbo as that is the stronghold for a twin scroll. We would need to see a non-interial load dyno graph (not sure which dyno AMS has) or datalogs to see which spools faster in the real world too.
-Micah

 

yes, that is true in relation to rpm but I think that Ted B and I are saying in the real world, with real load that the twinscroll takes less actaul time to spool up in comparison to the single scroll.
sorry being a bit too much of an engineer but just trying to see all aspects of the test
-Micah

 

Well

like Martin said, let's see the no bullshi% test! Someone send AMS a 35Kit and let's see the results.

Steve

 

Hmmm..... I keep reading too much conflicting info in this thread. Everything I have read about a TS setup shows that it decreases turbo lag... ideal for 35R and larger turbos (except maybe for drag racing IF its true it wont make the same top-end power)... so what the dyno suggests and what some people here are saying is that theres no difference in spool up??? WTF? Does that mean that the companies producing TS kits are trying to hoax us??? That doesnt make sense.... Perhaps somebody (i.e. FULLRACE) can post a dyno comparing their old GT35 kit to their new TS GT35 kit, given the same mods/tune/same damn car in every way minus the TS setup....

 

when i was talking to ams a while back about a turbo setup. i wanted a 30r. they said 20psi at 4400 rpm. in whatever gear i dont know.

i see 24psi in 3rd gear at 3900 rpm..... i actualy spike 25 but hold 24. so take it for whatever way you want too.... i even found some dyno graphs of your 30r setup. and the 4400rpm you guys said you see showed to be true. the guy whos graph it was said his was 3rd gear also.


scorke. lol bro. i was joking. his post was way off. i was just being a smart guy. heheeh

 

3rd gear. load ????? aaaaaaaaa flat ground i guess. lol. what do you mean