fd twin turbos?
12-26-10, 06:42 AM
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fd twin turbos?
hey so i just bought a rebuilt set of twins. what is the difference between sequential and non sequential twins? and how do i tell the differences.
thanks guys
thanks guys
12-26-10, 06:51 AM
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Sequential means that they run in a pattern, mostly known as 10-8-10 where the primary turbo boost, then the secondary kicks in.
Non sequential means that they run together, they spool together and act like 1 turbo. The turbos can be run in either mode depending on how you set them up with the vacuum lines. You can do either with the twins you have.
Non sequential means that they run together, they spool together and act like 1 turbo. The turbos can be run in either mode depending on how you set them up with the vacuum lines. You can do either with the twins you have.
12-26-10, 07:02 AM
#4
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You REALLY need to read thru a LOT regarding this. While Warpaint is technically correct, there is a lot more to "how you set them up with the vacuum lines" than what those words imply....lol!
The sole function of the 'rat's nest' ( a number of solenoids with about 35' of vacuum lines ) is to make the twin turbos 'sequential'. And keep in mind there are pros and cons of both sequential and non-sequential set ups.
Seriously....read all you can. This is likely THE #1 issue with the FD.
The sole function of the 'rat's nest' ( a number of solenoids with about 35' of vacuum lines ) is to make the twin turbos 'sequential'. And keep in mind there are pros and cons of both sequential and non-sequential set ups.
Seriously....read all you can. This is likely THE #1 issue with the FD.
12-26-10, 07:06 AM
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Some people will say one is better than the other, but honestly if you were going to run them non sequential you might as well get a single, smaller turbo. It would be better for performance, weight, cooling. Im sure you have done some research on your car, enough to know that the stock twins are the enemy because of the heat that the manifold keeps on the engine block. So if you were going to add that extra bit of heat and weight your better off running sequential. Plus most everone on here will tell you when they are running properly a good set of sequential twins cant be beat in the fun category. I loved my sequential setup and wish it was still running smoothely but its not.
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12-26-10, 07:08 AM
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ya the original plan was to buy a single turbo kit but im only 18 and really short on money so i just bought a temp twin to replace my blown ones for the moment. this guy said he could help me install them. so i was just wondering the difference between s and ns. hope he knows how to set them up
12-26-10, 07:09 AM
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haha and yes bajaman is right, you need to read up on it a LOT because there is way more to it than just "how you setup your vacuum lines" im just lazy and that has alot to do with why my engine is no longer... 
12-26-10, 07:11 AM
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The real limitation to the twins btw is that you cant run them over 15 psi for long before they are toasted, not to mention they are smaller turbos so they naturally flow a smaller portion of air. Yes going single will costs you more money but less headaches down the road. I never took the chance to go single, maybe on my next fd
12-26-10, 07:13 AM
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lol alright thx for the help. so do i have to take it to a shop to get them set up as sequential? or if someone knew how to could they just do it at home?
12-26-10, 07:21 AM
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You said you had a friend that would help you install them, your best bet is to a) let them give you advice if you trust them b) Find a reputable rotary shop around you to do it (this is what I would do in your shoes)
12-26-10, 07:28 AM
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If you have a stock, non-sequential system now....just carefully mark every single vacuum line you have when you take off the old, blown turbos (would like to know more about why you think or know they are "blown") and put them on in the correct places on the newer set you have. But PLEASE (can't emphasize this enough), PLEASE take some time to read about the system. Please download the factory service manual or purchase a hard copy from one of the many places on the Web. The more you understand about this car, the better (and cheaper!) it will be for you.
Please don't take this wrong way, I am NOT attacking you...but this is my observation. You're young and you got your 'dream car' and now it needs some attention.
THIS is where 99% of kids in your shoes go wrong...they try to take the bailing wire and duct tape approach to repairs, and/or simply don't know enough about mechanical things in general and rotary engines in particular to be successful.
There is a wealth of knowledge on this forum, and people will bend over backwards to help you.
Please don't take this wrong way, I am NOT attacking you...but this is my observation. You're young and you got your 'dream car' and now it needs some attention.
THIS is where 99% of kids in your shoes go wrong...they try to take the bailing wire and duct tape approach to repairs, and/or simply don't know enough about mechanical things in general and rotary engines in particular to be successful.
There is a wealth of knowledge on this forum, and people will bend over backwards to help you.
12-26-10, 07:31 AM
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ya im still trying to learn as much as i can. i know the secondary is bad because im not holding boost and wen i had it lifted in the air my secondary was soaked in oil. so i figured that it was time for a new one. i had my car on a dyno not to long ago i only made 147.... was very sad wen i saw this
12-26-10, 07:37 AM
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Listen to baja, I was one of those kids that got his car and got way in over his head on it. But I also know 1000000000X more than I did years ago when I got it. Most of it I learned the Hard, Expensive way. And Im still learning every day.
12-26-10, 07:42 AM
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^^ will do =]. do either of you know where i could get some info on how to set up my twins as sequential? because im tired of taking my car to shops... its been in and out for the past 2 years and nothing has been fixed
12-26-10, 07:43 AM
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sorry for the confusion. i dont know the guy. i just bought the twins from him on friday and he said he could help me install them. but u guys said it was harder to set it up as sequential? so im not sure if he knows how to do that or not i never asked
12-26-10, 07:49 AM
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Sequential is stock. Do a search and you will literally return more info than you will be able to read in the next week. Not trying to discourage you, but EVERYTHING you need to know to do this yourself can be found by doing a search. Just be careful, take your time, lable everything as you pull it apart and most of all, learn from the experience. Its a whole lot of fun
12-26-10, 08:16 AM
#22
Unless those turbos are BNRs, do yourself a favor and don't install them. Because of the design of the turbocharger assembly casting and excessive heat these motors generate, the casting warps over time and this is why rebuilt turbos don't last. Either get a set of BNRs, a set of 99s, or if you must a known good working used set to get you by.
12-26-10, 08:19 AM
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well like i said im short on money. have no cash flow either. so unless i could find some for under 300 bucks im kinda out of luck. but thanks for the info