Got my Holset today but...

[tunermag]

I missed an important detail when I ordered. I've got a divided AR 70 compressor and I have a non divided manifold.

What do you suggest ?

1 - Install a divided exhaust manifold

2 - Install a quick spool valve like this:
http://www.spracingonline.com/store/Sound_Performance_Quick_Spool_Valve/3643

3 - Go with the non-divided manifold on my new divided turbo

Tks in advance

Some pictures of my new turbo:

Size shown in centimeters

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[viperlp01]

Thats a metric tape ruler right .. I was like GOD DAMN

 

[tunermag]

Thats a metric tape ruler right .. I was like GOD DAMN

Yes Sir , I'm from abroad (Argentina)

 

[dsm-onster]

If you're looking for opinions. . . Divided manifold route is MUCH more expensive. But very worth it. The benefits are worth the costs.

 

[GSXeclipsePSI]

Off topic but old school phone homie... I use to love that phone

 

[tunermag]

If you're looking for opinions. . . Divided manifold route is MUCH more expensive. But very worth it. The benefits are worth the costs.

Tks, and what you think about the quick spool valve? It looks like an interesting mechanism to accelerate spool time.

 

[92AWDHX40]

thats a nice looking piece there.

 

[clockworktoy]

I wouldn't bother with that valve, at that price your halfway down to a manifold.

 

[tunermag]

I wouldn't bother with that valve, at that price your halfway down to a manifold.

Despite the price (I can machine that piece here for less money), worth it ?

 

[ramsack]

that spool valve looks like a waste and very wrong. one runner is for cylinders 1 and 4 and the other is 2 and 3. if you completely block one of those off i can't even imagine what would happen. twin scroll helps with spool over a non-divided housing anyway. i personally would spend the money for a divided manifold and reap the benefits of twin scroll.

 

[1stGenTSi]

that spool valve looks like a waste and very wrong. one runner is for cylinders 1 and 4 and the other is 2 and 3. if you completely block one of those off i can't even imagine what would happen. twin scroll helps with spool over a non-divided housing anyway. i personally would spend the money for a divided manifold and reap the benefits of twin scroll.

It's not blocking off 2 cylinders (it would be if you put it on a divided manifold) it's just using one half of the turbine housing until you build enough boost to open the actuator. I think it's a pretty good idea if you can get one made at a decent price and get it to fit. Although a ts manifold would be the best option.

 

[tunermag]

that spool valve looks like a waste and very wrong. one runner is for cylinders 1 and 4 and the other is 2 and 3. if you completely block one of those off i can't even imagine what would happen. twin scroll helps with spool over a non-divided housing anyway. i personally would spend the money for a divided manifold and reap the benefits of twin scroll.

You must use that valve with a non-divided manifold. So, you aren't blocking an exhaust pulse.
When you begin to accelerate you route all the exhaust gases through one port of the turbo. In theory, this helps the spool up, but when you hit 8/12 psi, it will be open allowing a free flow.

 

[ramsack]

current manifold + cost of "spool valve" vs. new manifold.

in what theory does this work. there are 2 scrolls, which allows for better spool. yes you are adding velocity by cutting away a scroll, but you're also losing a scroll to spool with. that spool valve costs a lot. you should research and see if you could sell your current manifold for enough and add in the price of the valve, then see how much a divided manifold is. or just sell or return the turbo for a non-divided.

 

[LiquidX]

+1 on above.

Twin scroll is the optimum way to go but will cost a bit more over all. Don't bother with that valve, use the money elsewhere.

If you just got it, contact the seller and tell them the issue that you ordered the wrong one and you need the non-divided housing.

 

[tunermag]

+1 on above.

Twin scroll is the optimum way to go but will cost a bit more over all. Don't bother with that valve, use the money elsewhere.

If you just got it, contact the seller and tell them the issue that you ordered the wrong one and you need the non-divided housing.

Not problem with the seller but they can't offer an undivided AR 70. The thing is that I love this turbo now and I don't want to get rid of it

Time is the constraint here, I think I could fab the valve in less time that the new manifold. But, if that valve is not proven and represent a constraint, I'm sure I'll mod or make a new manifold.

 

[LiquidX]

Why not just get a BEP housing then?

 

[90moneypit]

Without scrolling through 100 pages of the Holset thread... How much sooner does a twin scroll manifold spool up a stock Holset housing? DSM-onster's summary is for non-divided manifolds and the various HX's, but what do you see WITH a divided manifold? This might help the decision between manifold choice since there doesn't seem to be any problem with running a divided turbo with a non divided manifold.

 

[tunermag]

Why not just get a BEP housing then?

I'm from abroad, I don't have a wide variety of housings and parts here

Without scrolling through 100 pages of the Holset thread... How much sooner does a twin scroll manifold spool up a stock Holset housing? DSM-onster's summary is for non-divided manifolds and the various HX's, but what do you see WITH a divided manifold? This might help the decision between manifold choice since there doesn't seem to be any problem with running a divided turbo with a non divided manifold.

Great point, I haven't noticed that and I surfed a lot of those thread to chose my turbo. I thought I'll have problems with a non-divided manifold and this turbo.

Maybe, I'll try my undivided manifold for the initial period of my build and make a new divided manifold, if worth, in a future.

 

[1gDSM4g63]

I'm assuming the OP has a HX40 right?

 

[1995gsx20g]

current manifold + cost of "spool valve" vs. new manifold.

in what theory does this work. there are 2 scrolls, which allows for better spool. yes you are adding velocity by cutting away a scroll, but you're also losing a scroll to spool with. that spool valve costs a lot. you should research and see if you could sell your current manifold for enough and add in the price of the valve, then see how much a divided manifold is. or just sell or return the turbo for a non-divided.

velocity is closely related to torque, that higher velocity is what spools the turbo at times during lower flow. it will have more lag by using both ports on an undivided manifold.

but i agree its not worth the price if you manifold is brand new.
now if it was used then its another story..

 

[tunermag]

I'm assuming the OP has a HX40 right?

I'm sorry, I don't know what OP stands for.

velocity is closely related to torque, that higher velocity is what spools the turbo at times during lower flow. it will have more lag by using both ports on an undivided manifold.

but i agree its not worth the price if you manifold is brand new.
now if it was used then its another story..

I have my manifold since a previous stage. I can build that valve here for less money than those advertised price. So, what do you think is the best solution to go for ?

 

[JusMX141]

Is that a Bullseye turbine housing? I've never seen a divided .70a/r T3 for a HX40, but I'm actually quite interested now!

 

[1gDSM4g63]

I'm sorry, I don't know what OP stands for.

OP mean you, the person who started the thread.

 

[tunermag]

Is that a Bullseye turbine housing? I've never seen a divided .70a/r T3 for a HX40, but I'm actually quite interested now!

I really don't know wich housing is. The local representative here build this for me. They normally works with big boats and Caterpillar like equipment but they make an exception with this.

 

[red_devil]

A divided .70a/r T3 HX40 with a twin scroll manifold would be a pretty sweet setup.