ok i know a lot of **** about boost and a LOT of stuff about N/A but the whole turbo thing confuses me, I have a very vague understanding of Turbo terminology. I am supposed to be geting an 87 TII shell on sunday and i would like to put a 13B-RE in it wih a BIG Street port.



here are my questions, what is the significance of the letters and numbers describing the different turbos i.e. T04E vs T04S vs T66?



it comes with twin turbos, what are the advantages of singal over double and vise versa??? what is the adv, disadv, of running sequential vs parallel???



what size should i use to have power off the line as much a posible while keeping a decent boost range??



that is about it, as i begin to delve into the world of boost. oh this wll be my daily driver so i will be going with a combination that is both streetable and "spirited" I will already have my GXL for my off road fun so this will be complete with comfort



thanks

Justin

B/E/T-series (no letter after the numbers) desginates the family.



Instead of looking at the B/E/S/R designators you first need to look at the horsepower desired, vehicle usage (street/drag/road course) and budget.



Sequential turbo is great for lowend power but lacks a lot of top end punch. With a seg setup usually a smaller turbo is used in the first stage for quick spooling followed by a slightly larger turbo that is good from midrange to redline. Parasitic drag plagues sequential setups and the seq setups fizzle in the 330~350whp range. True duals are better because you get substantial gains in midrange and topend power without losses due to parasitic drag and only a slight loss of lowend power that would mainly be used getting out of your parking space, You also don't have to worry about setting the fuel to compensate for the turbo changeover point.



With big ports a true dual or T04S/R would make much more power than a sequential setup since the seq setup would not be able to produce enough airflow. An AR.60 57trim compressor T4/T3 stage III AR.82 exhaust true twin setup or T04S p trim AR .100 single would be a good setup for a big street port.



Power off the line?? Are you planning on launching from idle? https://www.nopistons.com/forums/pub...#>/biggrin.png Your launch is going to depend on your clutch and tires more than the turbos! A lot of people will argue this point but without a good clutch/tire combo an awesome port with an awesomely matched turbo equals lots of lost races since you will destroy clutches and spin tires.



With true duals you have to worry about the (2)DP's, possibly (2) w/g if one large w/g can not be used, (2) charge pipes coming off the turbos, turbo placement if you are not buying a prefab manifld, COST and a couple other small details. I have yet to see a large single turbo setup produce more max hp than a true dual configuration but most single setups produce more than enough booty smacking hp for a properly setup and tuned street car.



If you want simplicity with good power get a T04S/R, RX6, T78, K27,GT35, GT40 setup but if you are looking at twins try the setup previously mentioned or an AX5 twin, TD05-18 twinTD06L2 twin, GT2835 twin, GT3037 twin, or GT3040 twin. Depending on boost and fuel any of those setups can produce 380~490whp!

thanks for the large amount of info, youtold me basically all of the things i didnt understand.



i am a little surprised at the numbers yougave me "380-490whp"!!!!! i dont mind a little difficulty in driving, i wont be letting my GF drve it, but how streetable can a 13B-RE TT be with 450hp to the wheels???



remember that this is my "comfort car" so it is supposed to have AC, power steering and a user friendly clutch that will hold with a lot of HP but wont jerk my passengers head off.



is all of his possible with even 425rwhp??



thanks

Justin

maybe you should shoot for 320-350rwhp, it wouldnt be so "radical" plus that kind of power in an fc is pretty quick



mike

i dont mind quick, i can hadle the car, ijust want to know if it will be a comfortable ride for my lady when i want it to......



Justin

400+ is gonna be loud and stinky.

300+ is gonna be quiet, and stinky is optional



mike

loud i can deal with with insulation, stinky i can deal with as well, i am mainly concerned about the street driveability i.e. having to feather the clutch, hard shifts anything that wil make the ride less physicaly comfortable



Justin

Off boost it will be mild. Its jumping on the throttle that will whoop your ass https://www.nopistons.com/forums/pub...#>/biggrin.png

Glad I could help! My turbo terminology and spec page should be back up in a few weeks! GEOCITIES sux!! Those fuggers killed my page without a valid reason! :rant:

This should probably go in the FAQ section. Ill leave it up in here a little while longer.