Has anyone tried running a T28 or a pair of them running as twins on the FD. It seems that they have nice spool up time and the power numbers are decent, I'm just wondering why I don't see anyone running them. -Joe

 

http://66.216.67.51/product.asp?0=220&1=362&3=720

 

Is that an actual seqential kit? or just 2 turbos runnign at the same time?

 

Also, does anyone know any numbers on this kit? I saw that kit before, but didn't realize it was T28s...How come so expensive? The T28's aren't half that price. Is it because of all the custome work?

 

external wastegate?
siunds like a nice pkg

 

anyone? Don't feel like bugging the store just to take care of my curiosity.

 

Use your commonsense and look at the plumbing. There is no way on earth that is a sequential kit.

For a system to be sequential, it must be able to route ALL exhaust to one turbo then split the exhaust gases in half to the 2nd turbo

 

hahaha tru dat, sorry, still all burnt up from finals.

Is there a point to running 2 smaller turbos like that instead of a larger one?

 

I'm assuming 2 smaller ones will spool up faster then one large.

 

No, T28s are internally gated, as illustrated in the image

I'd like to hear some numbers as well, but I doubt it'll do anything a nice single would do. Also have to question what kind of heat it might generate, similiar to how the twins produce so much.

The kit looks more like it'd be for the bling factor to me, with less money spent you can make more power effeciently.

 

From what I've read parallel twins spool slower, and since they are so small I don't see how they could move more air than a medium or large single turbo. I think this is all for looks and that is way too much money. It would be cheeper to have the pipes made, buy the turbos, and install it. Twins are mostly only used when it is more convenient to do so. ex: on a V-6 or V-8 motor where if you were to run a single turbo it would be more work.

 

two turbos of the same flow as ONE large one will spool faster then the single but the amount is not great. there is almost no point to go with a twin setup unless it is sequential which that kit isnt. and dual t28s are pretty big and will make lots of power.

there would be two turbos to care of of instead of one as if u had a single, and there might be more heat but reserach needs to be done to prove this.

 

I'm going to have to disagree. I think spool times on the T28s would be comparable to spool time on something like a T66 (if not longer) and the T66 would make gobs more power than the twins, not to mention do it effiecently.

Also, correct me if I'm wrong, but you're saying if the twins combined flowed the same as a large single that the single would still make more power? Isn't it all about effecientcy and CFMs tho as far as making power goes? If that was the case then wouldn't they make the same amount of power if they both flowed the same?

To touch on another point about twins being strictly looks. While in a lot of cases they are pretty much just for the *bling* factor, that's not always the case. A lot of supra owners will go with larger twins after a certain point when wanting to make more power. Usually when they can't make much more power on the T88h and want more, they'll go to much larger HKS twins.

 

He's saying that twins will spool up more quickly than a single if both are of equal flow capacity. Obviously when we're talking about flow capacity on the twins its the combined flow capacity. Thats the whole point of having twins in the first place. This is in parallel operation. Sequential operation like the stock setup is comparing apples to oranges. So, basically, its a tradeoff: twins = better spoolup but more complexity.

 

rp