hi there today all ..... would any one be able to tell me what the max psi handling capability is for a 13bt ....... im doing a swap and i want to know how big a turbo i can put on and stil;l be safe ya know?... thnx guys

 

well that depends how much fuel you can put in it and how much money you have.

Im sure you could run upwards of 30psi in a rotary but what are you doing with it, drag, street, whats the purpose of the build?

How much power do you want?

 

im looking to be capable of 35 psi .... ive recently aquired a membership to a race team .. and we do alot of drag ... however i do like to toy with the silly ricers on the street and the guidos with there irocs lol .. thoes guys are fun but mustangs are the best when u dust their *** they feel silly .. but back to the point .. mainly street this will be a daily driver ... however i will be taking it to the strip ... and possibly the circut as well ... im versatyle like that i also have a boost controller in mind thoie

 

well a boost controller is only going to help you out so much if you have a turbo capable of over 30 psi....you won't be able to drive around at 5 pounds of boost......

but what s your power goal, thats the bigger question, not just I wanna run 35psi

 

power goal .. id like to be able to put atleast 300hp and a little more tq to the ground .... and i dont think it will be that hard with the engine and turbo combination
and i understand that a turbo has a sertain levle of effiency .. like im looking for the least 12 psi and the most 35 .... 12 for just cruising and some street ... everything else for the track

 

300 HP is VERY easy on a TII

 

the thing is is a 88 base ... but im doing a drive train swap ... is there anything else different between the 2 other than options?

 

300 hp can be done easily with a turbo such as a gt35r, you could go to about 350 on a 35r with upgraded & approiatley sized fuel system. Probably 850cc's all around, or 850's with 1300 secondaires and a 255lph walboro and FPR.

Those goals can be achieved on stock ports, basically slap a bigger turbo on, throw more gas in the mix and of course, an upgraded intercooler, the OEM TMIC will become a frying pan after about 12psi

 

Between a base and a TII?

 

yes between a base a dn a t2 ...... so what ive gotten from this convo is that with stock t2 drive traing and internals .. i can easily achive 300hp and tq ... safly?andyes i already have a fmic ..

 

yes stock drivetrain and internals....needed is a bigger turbo and appropriate control devices (capable wastegate, capable bov, proper manifold, FMIC) upgraded fuel (injectors, pump, regulator) over 300rwhp can be easily achieved....safely.

The differences between base and TII were many, check the stickies for all that crap. biggest was turbo motor drivetrain, no turbo motor and drivetrain

 

Not to be an ***, but 35 PSI!?! darn... umm, if you run that much boost on a 13B lemme know what kinda power you put out... there are people making 300rwhp on less than 10psi.... you should look around a little more, maybe check out some dyno sheets and etc for ones around your HP goal and see what they are running...

I assume you also plan on running some kind of Fuel/Ignition comntrol, do you plan on going full stand-alone or piggy-back?

- chris

 

PSI in a performance standpoint is completely useless, it won't indicate power or anything useful other than determining compression heat rise. Unless you know exactly what turbo you are going to use, don't even worry about the PSI, pick a horsepower number and find a turbo to suit, then you can determine what 'psi' will effect.

 

35psi on piggy back i doubt its even possible (althought im not too sure)

my buddy lee runs 35psi UN PORTED 13bt....runs 10's NON GUTTED.....550-600hp....hes got a water to air IC in the DASH and a tanabe racing medalion...and rocking that kinda power....i belive its a t78 or a T04R....sumthing along those lines....so i mean 35psi = u godly amnts of power...regardless of what turbo setup u have...its going to be alot...toomuch to make the car last reliably UNLESS...u have alot of money then it goes back to the fast, cheap reliable pick two thing...lol

 

no offense but this whole thread seems a bit over the top, do some homework on your own rather than having other people tell you how you should build your car because you will be getting mixed answers everywhere and i'm not even gonna bother.

 

i agree with karack and people have to understand eitherway if youre running like a t04r pushing 35psi youre not going to be driving that thing on the street. not to be rude but you kind of sound like youre inexperienced with turbo's and turbo setups and maybe should read a bit more before undergoing any kind of insane modding. its obvious if you had read 300whp can be obtained easily with porting and other mods or stock ports with fuel ecu and turbo upgrades... i would start by reading the power mod list on fc3spro.com

 

your going to need a fully built race motor for 35psi, i would bet at 35psi and good sized turbo would be a car making over 700bhp easy, quick look in google found
9.20@150mph 1/4 mile
650RWHP/520RWTQ T-72@35psi

 

in response to crassfc3s yes i am inexperianced with turbos ... and to tell u the truth ive been trying to do research and havnt realy found much .. so i figued y not ask ppl who know the best ... fc owners ... and if i can safly run say 16-25 psi ... i already have a turbo fmic plumbing and fuel pump picked out ... so yeah ... ive been doing some research just havnt found all the answers .. however everyone has beena great big hhelp ... thanx alot guys

 

Well, you need to stop worrying about 'psi', because right now it's useless. You need to determine what kind of powerband you want and pick a charger, then a fuel system capable of such (a walbro is going to hate life at 65psi with a RRFPR, especially with those fuel needs). Decide on a goal power, both your 'strip' and regular road goal, and find a charger to suit, then you can determine from it's map what kind of 'psi' you'll run, and you can determine a lot more from there. But just saying 15-35psi without knowing anything else is kind of pointless, you could throw a 13G on there from a DSM and run 40psi and probably only get 300hp, or a T78 and get 700, PSI is way too relative to speak of like that. If you've got the turbo picked out, check out it's compressor map and keep the boost within the best efficiency

 

can u tell me how to "check the compressor map"? .. like i said im in experianced .. i know a turbo has an efficeny levly .. i just dont know hot to read its map as u say .... would i be able to tell by its ar rating?...

 

Well, it depends on the turbo really, some companies don't release the maps, others do. You can search google for 'not2fast turbo efficiency maps' and they have some common ones, they generally plot the efficiency over flow and pressure (pressure is usually the Y axis and flow is the X), you determine at what PSI you wish to run, then add 14.5 and divided by 14.5 (say you want to run 20psi, it'd be 34.5 / 14.5 = 2.37 is your pressure ratio (again, usually on the Y axis), then you need to determine what the rotary engine flows at that PSI in cfm or lbs/min (lbs/min is more common)

Here's an example of a GT35R map, to find the efficiency go up to the 2.37 on the pressure ratio side, and make an imaginary line. I'd figure 20psi to be around 50lbs/min @ 7500rpm, so find it on the flow axis and move up from there to meet your pressure ratio imaginary line, where the two meet is where the turbo will be in it's efficiency range, generally you can get a fairly good idea if a turbo will work well in this situation or not. Again, there's more to it obviously, but that should get you started.