Tuning Twins

I knew I'd catch some flack for talking about a lock up switch..


LOL


Rightly So though lol
 
inline6power said:
I bed at 70psi your right at 1 to 1 boost drive pressure.
Click to expand...

Not trying to be an A$$ but, how can you assume his DP's are a 1 to 1 ratio @ 70lbs of boost with out a DP gauge? I can hit 70lbs of boost, but I also will see 100lbs. of DP the higher the RPM's go up..

Just asking..

Great advise on the in cab boost controller.. Just to add some more info.. I installed one of "AFE's new WG Actuator (40lbs.) and it really makes a big difference in controlling the WG over the OEM actuator.. OEM actuator allowed to much creep..

I have a smooth consistent opening of the waste gate and a consistent average of DP and Boost until higher rpm's..

For reading the chart, boost on the left and the bottom numbers correlate to the line number on the spread sheet..

photobucket-1587-1339496283564.jpg



photobucket-16969-1339496309978.jpg
 
homewrecker said:
How is this plumbed in? Is it venting boost or being used like an adjustable boost elbow?
Click to expand...

Its shows on the website its vented to the engine compartment, so I'd say like an elbow. Good instructions (PDF) on the website for it..

Sent from my DROID RAZR using Tapatalk 2
 
jgsturbo said:
Using a gate source in between the top and bottom charger. Will delay gate opening till there is primary pressure.
Click to expand...

A couple guys here have tried it. It doesn't work as well in practice as it does in theory. I don't believe anyone has continued to use such a set-up.
 
Have you guys had problems with the spring gates? My set up is a spring gate and it sure seems to be a lot simpler to tune.

Sent from my DROID X2 using Xparent Blue Tapatalk 2
 
rlawless said:
Not trying to be an A$$ but, how can you assume his DP's are a 1 to 1 ratio @ 70lbs of boost with out a DP gauge? I can hit 70lbs of boost, but I also will see 100lbs. of DP the higher the RPM's go up..

Just asking..

Great advise on the in cab boost controller.. Just to add some more info.. I installed one of "AFE's new WG Actuator (40lbs.) and it really makes a big difference in controlling the WG over the OEM actuator.. OEM actuator allowed to much creep..

I have a smooth consistent opening of the waste gate and a consistent average of DP and Boost until higher rpm's..

For reading the chart, boost on the left and the bottom numbers correlate to the line number on the spread sheet..

photobucket-1587-1339496283564.jpg



photobucket-16969-1339496309978.jpg
Click to expand...

I have always wondered about claims of boost and drive being equal at a certain boost level. maybe at a certain rpm but if you are 1 to 1 at 1800 you probably are not 1 to 1 at 3800. and if you are 1 to 1 at 3800 you probably aren't making boost at 1800.
 
SHughes said:
A couple guys here have tried it. It doesn't work as well in practice as it does in theory. I don't believe anyone has continued to use such a set-up.
Click to expand...

Interesting , I have seen such weirdness from odd sources before.
 
gs1000 said:
I have always wondered about claims of boost and drive being equal at a certain boost level. maybe at a certain rpm but if you are 1 to 1 at 1800 you probably are not 1 to 1 at 3800. and if you are 1 to 1 at 3800 you probably aren't making boost at 1800.
Click to expand...

I agree but most setups I have seen like his have been very close to 1-1 at full boost
 
Ok so here's my set up:

Ford 6.0L with 285cc/150% injectors.
dual hpop's

ED. billet 63/68/.70 (12cm) over a FI S482/92/1.10
The secondary is wastegated with a spring style actuator. (Which I believe, the spring is too stiff)
I have a Sound Performance Quick Spoool Valve on the 82mm that starts to open at 8 psi. (referenced from the 82mm's output boost)

Cruising down the highway, 75mph, and roll into it so it doesn;t down shift, I have this:

100 psi drive pressure to the secondary. (63mm)
50-55 psi drive to the primary. (82mm)
Only got 20 psi coming out of the 82mm for boost.
Total boost pressure to engine is 65psi.

Can someone figure out the ratios for me, and what I need to do please?

I think I need either a bigger housing on the T3, so a divided .80 or even an open .80....or try a lighter spring in the wastegate actuator so it opens up sooner.

...thoughts?
 
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Extended Power said:
Ok so here's my set up:

Ford 6.0L with 285cc/150% injectors.
dual hpop's

ED. billet 63/68/.70 (12cm) over a FI S482/92/1.10
The secondary is wastegated with a spring style actuator. (Which I believe, the spring is too stiff)
I have a Sound Performance Quick Spoool Valve on the 82mm that starts to open at 8 psi. (referenced from the 82mm's output boost)

Cruising down the highway, 75mph, and roll into it so it doesn;t down shift, I have this:

100 psi drive pressure to the secondary. (63mm)
50-55 psi drive to the primary. (82mm)
Only got 20 psi coming out of the 82mm for boost.
Total boost pressure to engine is 65psi.

Can someone figure out the ratios for me, and what I need to do please?

I think I need either a bigger housing on the T3, so a divided .80 or even an open .80....or try a lighter spring in the wastegate actuator so it opens up sooner.

...thoughts?
Click to expand...
here you go. both chargers are doing 50% of the work. how do they run on the truck? egts? if your wanting more boost i would work the primary harder but it looks good on paper.
 

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Ok, so now I'm confused all to hell...
I was thinking I needed to get the "overall" drive pressure to match the "overall" boost pressure? (1:1)

If I have 100 psi drive, and only 65 boost...isn't that a chitty ratio? (1.54:1)

Temps were 1550*F just before I backed out of it.

I just don't think the primary is even working hard yet...
On my last set up, 66/71/80 over a S480/96/1.32 I have the same 100 psi drive, but the 80mm was putting out 30-35psi...

How can the bigger turbine wheel and housing, (96/1.32) with an 80mm wheel, and smaller injectors, 225cc/100%...put out more pressure/volume then the 92mm/1.10 housing, and a 82mm wheel?

If I can get the wastegate to open sooner, and drive the primary up to say 30 psi output...what would the numbers look like then?

I know the drive pressure would prolly drop down to around 75-80psi, but I don't know what the total boost would be...

And thank you for the chart!!
 
Extended Power said:
Ok, so now I'm confused all to hell...
I was thinking I needed to get the "overall" drive pressure to match the "overall" boost pressure? (1:1)

If I have 100 psi drive, and only 65 boost...isn't that a chitty ratio? (1.54:1)

Temps were 1550*F just before I backed out of it.

I just don't think the primary is even working hard yet...
On my last set up, 66/71/80 over a S480/96/1.32 I have the same 100 psi drive, but the 80mm was putting out 30-35psi...

How can the bigger turbine wheel and housing, (96/1.32) with an 80mm wheel, and smaller injectors, 225cc/100%...put out more pressure/volume then the 92mm/1.10 housing, and a 82mm wheel?

If I can get the wastegate to open sooner, and drive the primary up to say 30 psi output...what would the numbers look like then?

I know the drive pressure would prolly drop down to around 75-80psi, but I don't know what the total boost would be...

And thank you for the chart!!
Click to expand...
i agree 100% that you need to work the primary harder. 20psi out of that charger is doing hardly anything. if you can get it to around 28-32, i can almost garantee total boost will be around 75psi and drive will be well under 100psi as well as cooler egts.
 
Thank you very much for your help.
I'm gonna try some changes to the wastegate spring, and see what happens.
I also have a fella that wants to trade my 12cm housing for his 14cm.
But until I know for sure that this 12 is too small, I don't wanna jump to too many conclusions.

Again, thanks for your help.
 
Extended Power said:
Ok so here's my set up:

Ford 6.0L with 285cc/150% injectors.
dual hpop's

ED. billet 63/68/.70 (12cm) over a FI S482/92/1.10
The secondary is wastegated with a spring style actuator. (Which I believe, the spring is too stiff)
I have a Sound Performance Quick Spoool Valve on the 82mm that starts to open at 8 psi. (referenced from the 82mm's output boost)

Cruising down the highway, 75mph, and roll into it so it doesn;t down shift, I have this:

100 psi drive pressure to the secondary. (63mm)
50-55 psi drive to the primary. (82mm)
Only got 20 psi coming out of the 82mm for boost.
Total boost pressure to engine is 65psi.

Can someone figure out the ratios for me, and what I need to do please?

I think I need either a bigger housing on the T3, so a divided .80 or even an open .80....or try a lighter spring in the wastegate actuator so it opens up sooner.

...thoughts?
Click to expand...
Whynot try it without the spool flange?
 
You need to bring the primary in a lot sooner.. I would say it 38 to 40 pounds your gate needs to crack open..

Sent from my DROID RAZR using Tapatalk 2
 
Ok..Nother question...
Why, with 50psi of drive pressure to the primary, is it only putting out 20psi?
That is a chitty drive to boost ratio for a turbo...

And when you guys say that when it hits 35-40psi, the gate should open...how do you set it when you have 100psi on the one side of the gate pucks, and 50on the other?
Wouldn't that be 50psi acting on the gate pucks trying to open them? (and I still don't think they are open at that pressure.)
 
Extended Power said:
Ok..Nother question...
Why, with 50psi of drive pressure to the primary, is it only putting out 20psi?
That is a chitty drive to boost ratio for a turbo...

And when you guys say that when it hits 35-40psi, the gate should open...how do you set it when you have 100psi on the one side of the gate pucks, and 50on the other?
Wouldn't that be 50psi acting on the gate pucks trying to open them? (and I still don't think they are open at that pressure.)
Click to expand...

This is how I made the above spreadsheet above. Take three gauges (Over All Boost, Primary Boost & Drive Pressure.. Go for a drive and record (Take Video) of all three gauges at the same time while making several similar hard acceleration runs from zero boost to max boost, but start out the same every time.. You need my excel spread sheet to record the pressures.. Send me your email address and I'll send it to you.. Play back the video of your gauges and pause the video at every 2lbs and record to the spreadsheet... You can see exactly what is going on between chargers and when the gate is opening and maxed out... You can also tune the same way.. Cave man data recording if you will.. But the chart shows you whats happening..

I don't think your gate is opening by the boost numbers your showing above..
 
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