bluecar

Thanks was thinking duals 3" but runing them to the rear would be hard. Any other ideas

Orr89rocz

iTrader: (13)

Depends on where you put things...dual 3's into a single 4 should fit these cars well. My 99 has plenty of room for a 4". On my 3rd gen I run dual 3 down the passenger side over axle and out back.

baker7902

iTrader: (5)

so the rule of thumb the bigger the down pipe the better?

bluecar

Thanks for all the help, just hope the FTI cam work for my set-up

Orr89rocz

iTrader: (13)

Usually you try to run the biggest pipe you can fit but doesnt always means its the best for the application. I try to match the turbine housing size. If most T4's come with a 3" vband connection, I'd run 3" downpipe. But you can also match it based on hp requirements. Typical pipe flows 115cfm per square inch at 28" h2o. Typically require 2.2 cfm per hp. So if you make 700hp, thats 350 per each bank of cylinders... 350hp should require 770 cfm. Single 3" pipe flows 813 cfm. Good match.

There are guys making lot more power than that through 3" pipes but you may have more back pressure there and backpressure after the turbine is not desirable.

baker7902

iTrader: (5)

well im not going to be running twins i will be running BW st80 with race cover and 1.25 ceramic ex cover. im new to the tubo world have had/have superchargered and lolgas cars this will be my first turbo setup

Orr89rocz

iTrader: (13)

I think those turbines have 5" downpipe connections. Most I know run 4" since the availability of 5" pipe is limited and also its very hard to run that size on any car. 4" will cover alot of hp. Some even run 3.5" and still make power. Depends on how much you are shooting for.

bluecar

How fast has anyone been with dual 3" into a single 4". Thanks

Orr89rocz

iTrader: (13)

May need to check the turbo forums but I'm sure you can get well into the 8's depending on vehicle weight. I know I've been 9.72 with NO hard launch on boost, just footbrake. I had power to go 9.4's if the 60 fts would have been a low 1.3 like its capable of doing.

bluecar

Low 9's would be great street sleeper down here in the south.

bluecar

Any fast LQ4 combo's around with specs.

bluecar

Come on guys someone has a fast LQ4 turbo set-up

bluecar

Which cam would spool faster FTI 230/228 610/600 115ls or GT2-3 207/220 581/589 117.5 . Thanks