need help with turbo upgrade

B

BadazzSr20

NKOTB
hey all i have my sr20det and the stock turbo right now. i do have a t3/t4 turbo and all the hardware to install it. i was thinking of installing it but what i need to know if i change the turbo out will i need to tune the car or it should be ok with stock boost. i know if i change injectors and mass it will need a tune but changing the turbo will that need a tune too?

thanks guys
 
ok and what fitings and stuff would i need to plum in the turbo its a t3/t4 turbo anyone know what fitings i would need?
 
isn't this the guy that said "leave big boost to us big boys" correct me if i'm wrong u sir sound dumb as fuck right now
 
Don't do it until you can afford injectors and a tune.

*psi from a T3/T4 will have a completely different effect than *psi off a T25.
 
Tonymac said:
Don't do it until you can afford injectors and a tune.

*psi from a T3/T4 will have a completely different effect than *psi off a T25.
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ok thank you for your help i have injectors and fpr and everything i need to build big boost. i just was trying to short cut it for now. short cuting isnt a good thing but sometimes you can get away with things. but your logic makes alot of sence and you make a rather good point. thanks again for the input.

dacocoprince said:
isn't this the guy that said "leave big boost to us big boys" correct me if i'm wrong u sir sound dumb as fuck right now
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how do i sound stupid.
cause im making sure i do the right thing?
cuase im not like you that just slaps shit on a motor and hope for the best?
cause maybe i dont no to much about this forced induction motor and i want to see what fittings i need before i start the job?

this doesnt make me look " stupid as fuck " this makes me look like a guy that is going to build big boost and do it safely. so with that being said
u my friend are a asshole. :eek:

P.s when u dis someone on there thread to look kool make sure u dont look like the stupid fuck before you speak.

green_machine said:
you'll probably be fine for a little while. i wouldn't do any top speed runs or any crap like that
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this is what i was thinking. i new that i might get away without a tune but it wouldnt be the safest thing to do. thanks for your help.
 
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dacocoprince said:
bro ur a fucking moron....... http://www.sfldrifters.com/forums/showthread.php?t=43257&page=2

that is proof of how fuckin stupid u are.......i cud give two shits about what you ask its the fact that u talked smack last time ppl tried to help ur cry baby ass
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same thing i see in that thread ur u being a ass smartass to me about blowing my motor. and again ur in my thread talking shit to me. just stay out of my thread i dont want any advice form you. your smartass remarks are not making you look kool. stay out of my threads when u see my post just dont even click on it just keep scrolling. your a no body you talking shit in my thread if your not going to answer the question i ask without being a DICk then just shut the fuck up and move on. know one is impressed with you being a dick your hole life.
 
Tonymac said:
Don't do it until you can afford injectors and a tune.

*psi from a T3/T4 will have a completely different effect than *psi off a T25.
Click to expand...
im no turbo expert but if im correct boost reading is usually sourced off the outlet of the compressor and the only way to increase air mass into the cylinders is to A) make the airways less restrictive via i.e. porting aka N/A
or B) increasing external pressure from the other side of that restriction aka F/I.
switching over to a larger turbo, assuming all other factors remain the same, effects neither A nor B. no extra air means no extra fuel needed means no re-tune UNLESS you up the max boost setting, but please someone correct me if im wrong.
 
hhn2002 said:
im no turbo expert but if im correct boost reading is usually sourced off the outlet of the compressor and the only way to increase air mass into the cylinders is to A) make the airways less restrictive via i.e. porting aka N/A
or B) increasing external pressure from the other side of that restriction aka F/I.
switching over to a larger turbo, assuming all other factors remain the same, effects neither A nor B. no extra air means no extra fuel needed means no re-tune UNLESS you up the max boost setting, but please someone correct me if im wrong.
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You are wrong and right in a small way. The only correct assumption was that basically boost is boost. However, all factors are not the same. A t25 is not a t3/t4. The increased turbine size will yield a lower turbine pressure ratio and therefore, decreased backpressure. As the pressure ratio drops, the engine operates more efficiently. As psi increases, efficiency will increase exponentially as well. This is why on my last car at 14psi on a stock t25, i made the average 250whp (with all my head work done) on a dynojet and when i upgraded to a GT3071r, I made 350whp at the same psi on a dynojet (probably more, heat conditions were brutal that day and the previous dyno run was at night in cool air). There is also compressor efficiency to take into consideration - as the compressor efficiency increases, intake temperatures decrease and again, engine efficiency increases. When all factors are looked at, what i said was absolutely correct in theory and practice. 8psi from a t3/t4 will have a very different effect on the engine than 8psi from a t25. if you're still not convinced, explain how a 3in exhaust yields huge gains off a factory turbocharged car.
 
yeah yeah +1.....

ill buy that t3 t04 tho....even trade ya a SAFE straight t3 "drift turbo"
 
to change it your gonna need injectors, MAF, change hot pipe, oil lines, manifold, tune it. If you dont already know this then your gonna be in over your head. The question is why do you need to upgrade your turbo?
 
SAS said:
to change it your gonna need injectors, MAF, change hot pipe, oil lines, manifold, tune it. If you dont already know this then your gonna be in over your head. The question is why do you need to upgrade your turbo?
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well my wastegate on the car is shot so before i spend money on a new wastegate i have all the parts needed for my swap. the only thing is i dont no what fittings i will need for the oil lines for the pluging for the t3/t4 thats what i was trying to ask. anyone that has a t3/t4 on there car that can help me and tell me what fittings and sizes i would need will be great.
 
well on my t3t4 im using a 1/8 fitting i belive -4 for the turbo side, an for the motor, i ended up using a banjo bolt which i picked up at murrays to fit the feed line i had
 
Tonymac said:
You are wrong and right in a small way. The only correct assumption was that basically boost is boost...
Click to expand...

i see what you mean tony. i completely forgot about the exhaust side of things, my bad. good thing i said i didnt know all there is about turbo systems. thanks :bigthumbu
 
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