[Sean_XTLux]

we should ask nate with his TD06

Though I would tend to agree with you Super (I've forgotten your name! sorry); TD05-20G vs TD06-20G, it's going to be very minimal unless you have big supporting mods to allow the 06 to push through some more boost; 20 psi on the 06 will still be more air than 20 psi on the 05, just as 15 psi on a TD04 is much less than 15 psi on the VF52...

 

[Superacerc]

If its the exact same compressor wheel how would 15psi be any different though? The only difference is the 05 can get to 15psi earlier in the rev range. The standard model turbos are identical with exception of the exhaust wheel and housing, nothing changed on the air pump side.

So lets say we could artificially turn one turbo via 18 speed bicycle till it puts out 15 psi and we do the same on the other but in a different gear. they are identical compressors just one guy pedaling faster than the other to get it.

Don't get me wrong, if I had an sti or a manual tranny and planned on shifting at 7500 rpm, the td05 wouldn't be effective at that point and td06 would be needed. Just not for us auto guys who'll never see those engine speeds.

 

[Superacerc]

Also think about this, both being the exact same compressor they both will make 15 psi at the same rotating speed. Meaning the turbos have to spin the same rpm to achieve 15psi. The only difference being on the exhaust fan and how effecient at turning vs exhaust speed it is. The td05 will turn quicker with lower exhaust speed and the 06 will take a bit mpre exhaust speed to get it moving. When blouch used to carry a standard TD05 and TD06 20g, they rated both at 440hp and 44lbs/min. If they're the same compressor they have the same potential for power making. Just depends on how fast you want to get there.

 

[nate_fisher]

td05, Td06sl2 and H 20g are 47lb per min td05 18g is 43lb per min. The td05 will spool faster but fall of quicker up top being a smaller turbine housing and wheel and will make less power because of this. Just based on boost alone my td04 would taper to 9 psi, my vf52 would taper to 16psi and my td06sl2 20g 8cm will taper to around 20-22 psi. Even my friends 2.5xtr tapers to around 22-24 psi at redline and its a 49lb turbo. The only turbo that will not taper on our 2.5 liters would be 35r territory in the 55lb and up size. My 20g will hit peak 26psi at 4200rpm and when it shifts at 6300rpm it will have tapered to 20-22 psi depending on the gear but believe you cant even feel it taper as it pulls hard to redline. The larger the housing/wheel the more power it will make but will also shorten the power band by spooling later. The td06 will alway make more power then a td05 but it all depends on what you want the turbo for? I drag my car and rarely beat on it around town and find the td06sl2 to be perfect for that. When i am at the track there is never any lag because i am launching in boost and after it launches the rpm is never below 4200 rpm so it is never out of peak boost.
Here is a good comparison of different turbos http://forums.nasioc.com/forums/showthread.php?t=2559017

 

[Superacerc]

So the compressor is actually different on that model then and that makes sense. But if the turbo were to have the same cold side compressor and same max flow rating it stands to reason that it would do no better just flow differently at different rpm levels.

That being said nate, do you think with the quicker spool and 60ft time would give you more advantage over the td06 housing you currently have at the drag strip?

For what it's worth, my TD05 20g seems to be capable of making the same pressure through the rpm range as your TD06 without falling off any different. In fact I'm hitting 21-22psi at redline with only 34% wastegate duty.


Sorry for the thread hijack.

 

[nate_fisher]

The flow ratings are the same but not on a compressor map. They both will flow 47lb but the td06 will flow that max for a longer period of time its just the way it is. At the drag strip our cars should be pretty close to the same but i would think the larger turbo would have more power were its needed but the better spool of yours would help the 60' time. That is why i am getting the high stall converter to help me spool at launch. But once you launch as i said your rpm is never low enough to make spool time a factor since you will always be in peak boost from there on out. Long story short it would be very close since your better launch would make up for my top end. Even with not being able to build boost on launch i still have managed 1.9 60' times but my vf52 i would be around 1.7. I hope with the ipt converter i can get the 60' back in the 1.7-1.6 area putting me in the mid to low 11's.

 

[Superacerc]

I deviated my off topicness back to your journal Nate. Sorry wudabum for the side track. Continue on and let us know how it goes.

 

[nate_fisher]

After my car is back and running we should compaire some logs and see what the diffences really are for other people to get a idea. Also the td06sl2 is smaller then a td06h also if you look at the mhi turbos in the turbo faq i put up it should say all of it. Also I used to be able to hold boost alot longer until i put on my equal length header. The more your engine flows the more the turbo chokes up top.

Yes lets pic this back up in my journal!!

 

[wudabum]

No worries with the deviation, it's a good discussion!

Trying to decide if there's anything else I want to order this weekend to take advantage of any black Friday deals...

 

[Rescuer]

now you guys got me wondering if i should do vf52 or H 20g

 

[wudabum]

can't go wrong with either

But I'm thinking I should have gone straight to a 20G lol
Once I get everything installed though, I doubt I'll regret anything haha

 

[Superacerc]

now you guys got me wondering if i should do vf52 or H 20g

If you have the fuel pump and injectors upgraded, The (another shameless plug) TD05 20g doesn't spool much slower than the vf52(although still noticably so) and you'll get all the power you can handle on pump gas without running out of psi at redline. The 18g is so similar to the vf 52 it's not really worth comparing the two but the 20g definitely will give you some lovely go power. Either way, if you plan on buying a new turbo, consider the Kinugawa and it's cheap price and pick up the 16/18/20g for 400 dollars cheaper than a new VF52.

 

[TGM2]

Oh dear, I thought my upgrade path was clear: VF52, now I'm not so sure.

It looks like I'll have to have a chat with Ray to see what he feels is best for me.

 

[nate_fisher]

The difference between the 20g and 18g will be pretty unseen on pump gas. You will really like the 18g it will be more then enough power for a dd and will be just as fast as a stage 2 sti if not faster.


Sent from AutoGuide.com Free App

 

[Superacerc]

I wouldnt say unseen. Its not like the switch from td04 to something else but its noticeable for sure. Its probably gotten me close to where I was on e85 on the 18g. Probably a bit shy. Maybe 30-40 more hp than gasoline and 18g combo.

 

[Rescuer]

i'm gonna stay on california 91octane

where is the link to the nasioc group buy? !

 

[Rescuer]

can't go wrong with either

But I'm thinking I should have gone straight to a 20G lol
Once I get everything installed though, I doubt I'll regret anything haha

sell me your 18G then and buy the 20G
:Banane35: i'm just over in dublin !

 

[nate_fisher]

I wouldnt say unseen. Its not like the switch from td04 to something else but its noticeable for sure. Its probably gotten me close to where I was on e85 on the 18g. Probably a bit shy. Maybe 30-40 more hp than gasoline and 18g combo.

I didnt mean to say that the 20g wont make more power. Just that unless he is maxxing things out like you and me the td05 18g can make close to the same power as the td05 20g on a nice dd tune. But if you are looking to break things like us then the 20g is more your style lol.

 

[nate_fisher]

This is there crazy black friday sale Steam Turbocharger

This is the normal group buy Search results for: 'nasioc'

 

[Superacerc]

The good thing about breaking things (take note everyone) is you get a perfectly legitimate reason to tell your wife you need to buy an upgrade. If they didn't make cars so feeble in the first place I wouldn't have to replace this stuff right? All cars should be built with minimum 500hp in mind.

My Outlook from the start when I do some of the stuff I do is with full understanding that ill probably end up breaking something and im prepared to deal with it. I dont want things to go wrong but because of things going wrong I've ended up with a built motor, inlet (because of a tear), up pipe(from diagnosing low boost) and in the future I will be surprised if my transmission doesn't fail.