Does anybody here actually installed this kit on a fully built 2.5l?

I'm seriously consider to buy it for my AXIS stage 5 but i need feedback...please..

I notice you have quite a few posts asking about twin scroll kits lately. Anything but a JDM twinscroll kit at the moment is very rare. They have not been out that long. I know the Nasioc member Dasani has been running an APS kit with mixed reults, and Russ has been running a custom GP moto kit until it wadded his turbo, I haven't heard if he has gotten it running yet. If there are any others with a twin scroll kit in the wild that is running and has produced numbers feel free to chime in. I think everyone here would be interested.

^ I also want answers!!!!

maybe try the australian forums. they might have more experience with the twin scroll setups since they have been playing with these things longer.

...I know the Nasioc member Dasani has been running an APS kit with mixed reults...
I thought I read a while back that he was pretty jazzed about it...did that change? I haven't followed that thread.

I remember reading the top end of the car was limited by the small A/R exhaust housing. Eventually APS sent him a "prototype" larger AR housing and then they were able to make more power. Apparently having a motor with ported heads and cams flows more air than the exhaust side of the turbo can handle. However I think he also said it was a good match for a car with stock heads/cams.

That all makes sense. However, I can't recall if he ever put up a dyno chart that showed any real gain in spool up that was attributable to the TS - did you ever seen one with the .82 a/r (the "small" hotside")?

i don't know if he put up a new dyno sheet. i think he did another track run though, and was trapping at 135 or 136mph or something..

i don't know if he put up a new dyno sheet. i think he did another track run though, and was trapping at 135 or 136mph or something..
Yeah, but that was with the 1.06 hotside, his heads, cams, race gas, yada, yada. All I saying here is I just wanna see an apples to apples dyno pull so we can see what the spool difference is, or is not. And I know this is gonna be tough using Dasani's car...not everyone else starts out with a $25K custom longblock. I'm sure we'd like to, but it just isn't in the cards for most of us mere mortals. :lol:

To answer your question Adolfy.. Bottom line, if you have extra cash twinscroll (assuming it is of quality manufacture See this link http://forums.nasioc.com/forums/showthread.php?t=1125662&page=2, Oh and it gets worse the more you read. I won't mention any names, but that is horrible looking) is a very desirable thing, and not only for it's reduction in spool time. I personally am one of the lucky ones. Every vendor that I have delt with (sans my insurance company) has been good to me. BC, Axxis, and yes even full race have all went out of their way to help me and answer questions. While it is true that Full Race had ~a 1.5 month turn around time I could not be happier with their header. Plus I do not know of another system that gives you more options in terms of Flange and Turbo Config. I have looked into it long and hard, and I chose Full Race and am happy. The quality and use of standard Garrett part numbers is nice, unlike APS who always tries to make their products sound custom, and or non standard. If it weren't full race I would go with UR. They seems solid, however they don't have multiple flange options available.

Flycaster: I looked long and hard for a 93 octane map on Dasani's page, but could not find it. Assuming I get my damn STi back anytime soon I will post some vanilla 93 octane numbers.

Cool - I look forward to seeing it.

I notice you have quite a few posts asking about twin scroll kits lately. Anything but a JDM twinscroll kit at the moment is very rare. They have not been out that long. I know the Nasioc member Dasani has been running an APS kit with mixed reults, and Russ has been running a custom GP moto kit until it wadded his turbo, I haven't heard if he has gotten it running yet. If there are any others with a twin scroll kit in the wild that is running and has produced numbers feel free to chime in. I think everyone here would be interested.

There's a few custom ones down here in PR. 3 of them run 9's with GT40R's (I posted a few of them on the PPB forum). 1 of them is using the Ulimate Racing the other ones are custom made down here. 2 more are in the low 10's and are working some issues out to get them into the 9's all boost. All of them are still streetable cars thanks to the twin scroll housings. One thing to remember... don't be shy to used large A/R if you have good heads and a twin scroll turbo! :devil:

Darel at UR told me that the twin scroll 40r kit spools 300-400 sooner than a single scroll 35r.
Maximum hp with the best spool up is what I am after since the car is built for unlimited class hillclimb.

The good thing with the 40R is that I will have more power available if I need it.

UR kit is the only twin scroll kit that uses two wastgates and Darel said that this set up makes full use of the twin scroll advantage anlike the single wastegate

UR kit is the only twin scroll kit that uses two wastgates and Darel said that this set up makes full use of the twin scroll advantage anlike the single wastegate

Adofly,

Have you seen blowbyu24's thread? He's running the UR gt40 twinscroll kit:
http://forums.nasioc.com/forums/showthread.php?t=1251701


Also have you checked out Full-Race's twin scroll 40R kits? They initially had a one wastegate setup and now switched to two wastegates. Also Full-Race has better quality products then UR and Full-Race's twinscroll 40r kit is cheaper than UR's twinscroll 40r kit. I'm not trying to knock UR in any such way, they also make great products.

Darel at UR told me that the twin scroll 40r kit spools 300-400 sooner than a single scroll 35r.


I would be interested in seeing that, I have not tested the UR kit but I have tested the Full Race GT40r kit and while it spools well for it's turbo sizing it doesn't out spool a GT35r (it's close to GT35r spool up though)

For a hill climb car you'd be far better suited finding out where the twin scroll GT35r's are coming from, I dyno'd a race car with one and all I know is it was modified by FP so had the HTA upgrade and had a .82 housing but it out spooled a single scroll GT30 on the same car by 300rpm and obviously made a lot more power.

Mike

I would be interested in seeing that, I have not tested the UR kit but I have tested the Full Race GT40r kit and while it spools well for it's turbo sizing it doesn't out spool a GT35r (it's close to GT35r spool up though)

For a hill climb car you'd be far better suited finding out where the twin scroll GT35r's are coming from, I dyno'd a race car with one and all I know is it was modified by FP so had the HTA upgrade and had a .82 housing but it out spooled a single scroll GT30 on the same car by 300rpm and obviously made a lot more power.

Mike

I know that Turbonetics makes a direct copy of the GT35R in it's GTK series. They have tons of turbine housing options too.

Darel at UR told me that the twin scroll 40r kit spools 300-400 sooner than a single scroll 35r.
Maximum hp with the best spool up is what I am after since the car is built for unlimited class hillclimb.

The good thing with the 40R is that I will have more power available if I need it.

UR kit is the only twin scroll kit that uses two wastgates and Darel said that this set up makes full use of the twin scroll advantage anlike the single wastegate

id be very suprised if thats the case, but will tell u in a couple of weeks...

Whats the benefit of twin wastegates?? i didnt see an advantage at all as u have both pipes merging into the one wastegate thus it should open at the same time..

unless ur thinking that one wastegate will open slightly faster than the other one???

id be very suprised if thats the case, but will tell u in a couple of weeks...

Whats the benefit of twin wastegates?? i didnt see an advantage at all as u have both pipes merging into the one wastegate thus it should open at the same time..

unless ur thinking that one wastegate will open slightly faster than the other one???

If you have one wastegate you still have an area in the manifold where header primaries merge pre turbine, so it is not a true twin scroll. Most companies put a divider that buts up close to the poppet on the WG, but it is not a perfect seal, so you still get a small amount of crosstalk. True dual wastegates on the otherhand still give you bypass control yet maintain true scroll segregation.

I dyno'd a race car with one and all I know is it was modified by FP so had the HTA upgrade and had a .82 housing but it out spooled a single scroll GT30 on the same car by 300rpm and obviously made a lot more power.

Mike

very interesting... The HTA upgrade with a twin scroll housing on the back of a 35R would make quite a deadly setup then...:eek:

If you have one wastegate you still have an area in the manifold where header primaries merge pre turbine, so it is not a true twin scroll. Most companies put a divider that buts up close to the poppet on the WG, but it is not a perfect seal, so you still get a small amount of crosstalk. True dual wastegates on the otherhand still give you bypass control yet maintain true scroll segregation.



The primaries dont merge, they are separated right to the upipe.. And there are two pipes coming from the upipe to the wastegate where they have a divider all the way to the wastegate.

The divider goes right the way up to the v-band flange so i would think there would be very little cross talk if any...

But there still is crosstalk... Not much as you stated but it is still there. You cant have the divider come too close to the wastegate valve.