Twin scroll?

[1fastII]

Could your header be built with a divided inlet for a twin scroll turbine housing? I want to run this housing on my GT3076R.


http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=ATP-HSG-009&Category_Code=HSG

[D94R]

You only really benefit from a twin scroll if the header is paired correctly at the collector. 1/4, 2/3. The way the header is made, if you divided it correctly, the turbo would sit 90* from the way it should. The turbo would either be facing the passenger fender, or the engine, instead of facing forward.

Or, you would need a rework/design of the header in order to place the right pairings in the correct orientation.

Now, if you are thinking you NEED a twin scroll outlet to bolt up a twinscroll housing,... you don't. The twinscroll housing will bolt up just fine if it's a T3 foot print.

[muddpawz]

whats the advantage/reasoning of running a twin scroll? preferance of one manufacturers turbo over another? or are the benefits that significant over a single opening?

[nagelandy55]

A correctly paired header will give you a faster spool up time. I'm sure Adam can explain this alot better but thats the short of it.

[Soul]

Um I'm bored and will take a stab at it, Correct me if I foul it up ;) , A paired runner puts the cylinders that pulse at the same time into different sides of a divided header, that way when the pulse goes there isn't a disruption of flow.

I THINK

[AJ_Fritz]

soul has it but he still hasnt really given the reason why it works better. there are a couple reasons.

flow is one. an easy comparison is a 4 lane interstate highway compared to two, 2 lane rural routes. same amount of realestate but twice the flow at the same speeds.

pulse is another. your giving one pipe time to get its pulse through the turbine before another one is introduced.

another is backflow. with events firing at opposite ends then there is never an overlap in exhaust events like there is with a none paired setup. this i will tell you, you pair them the wrong way they run worse then if the were not paired at all.

ive designed and run atleast 7 totally different headers for the 2.3L ford. ive got the eighth sitting on the engine stand in the garage right now. i may not now everything there is about design but i will say i know more then 90% of the people out there who have built a header for the 2.3. i know what works and what dont on a daily driver. i know nothing about dyno and track queens. ive yet to find a person thats spooled a turbo the same size as mine as fast with the same motor. the new header with the HX40 is going to rewrite the laws of turbochargers. it will open peoples eyes.

[flyin]

Keep us informed on the progress. It sounds interesting.

[muddpawz]

aj, you gonna run your new prototype on a daily driver? sounds like im need to get in on the stock option!!! let us know how it turns out!

[AJ_Fritz]

yup going on the daily. really i am not doing anything new with turbochargers. a lot of people have already done what I've done or am thinking about doing. i am trying some new stuff with the actuation and a different type of valve.

there are small problems with turbochargers. turbos are a restriction and do not bring up efficiencies at cruise. you will usually have a 15% mileage drop after you turbocharge. what i plan on doing with the scroll-gate is getting the best of both worlds out of a big and small turbine housing. FAST spool like a small turbine housing would give AND the good gas mileage of a larger turbine housing and a paired header setup for max pulse efficiency on top end. this can only be done with a twin scroll turbine housing because it is really 2 housings in one. if you have a 16 housing half of 16 is two 8's.

all of this stuff has been done but never together. i kind of think of myself as the 3M commercial. i don't make a header, i make them better.

[muddpawz]

ha! what a slogan! whats your thoughts on a turbonetics turbo, got a friend who had one on vw beatle and offered it to me for nothin. not sure what specs are yet, but over all any input?

[D94R]

there are small problems with turbochargers. turbos are a restriction and do not bring up efficiencies at cruise. you will usually have a 15% mileage drop after you turbocharge.

What? Please explain. I gained mileage after the swap.

[muddpawz]

i swa that too aj? what gives, more power with a mild streetable build should be more effecient, not less, if you can keep your foot out of it!! like chipping a diesel, improves mileage if your gentle!!

[AJ_Fritz]

you probabley improved your VE over the older motor d94r. remember your comparing turbo to n/a VE's. you didnt just slap a turbo on your n/a engine. you swaped ecu and engine.

[D94R]

Sorry,... I didn't think that deep into it.

[AJ_Fritz]

i love a good head scratcher :)