Turbo Confusion

[Puffadder]

I've been doing research for a future 3.4 project and have read turbos l,ll&lll. I have a good undestanding of the basics but find the "turbo sizing" somewhat overwhelming. I relize that for a given engine, turbo selection can be based on use: low boost everyday driving,hp street driving and all out topend. There is a guy at thirdgen.org that post a 12.6 sec. 1/4 mile using a T04E [50 ar int / 63 ar exh / 57 lll trim] @ 16 psi;then I've seen T60 & T70's touted as "the one" to use. Could you generate the same power at a lower boost with the "bigger" turbo and turn the same et ?

[UDLOSE98]

Re: Turbo Confusion

you could

this is because the car is flowing more CFM's or Cubic Feet of air per Minute out of a larger turbo.

[slow6]

Re: Turbo Confusion

Could you generate the same power at a lower boost with the "bigger" turbo and turn the same et ?

yes to same boost, thats possible
but bigger turbo will take longer to spool and give you a worse ET
but you could help spool it with some nitrous

[Puffadder]

Re: Turbo Confusion

Thanks, So I guess a way to choose for say a 3.4 would be to decide how much hp you want and how much boost you need to get it.UDLOSE98 why did you chose a t70 over a to4e ?

[slow6]

Re: Turbo Confusion

cause t70 is the shiznit
its perfect for the 3.8... just a little lag though cause its kinda big

[UDLOSE98]

Re: Turbo Confusion

this size turbo was perfect fo my application, also I got a small exhaust trim AND a ball bearing turbo, I expect to put down some ridiculous 60' times.

[Puffadder]

Re: Turbo Confusion

Oh, I thought you were running a 3.4,a 3.8 is and could better utilize the bigger turbo. The turbo cal. suggest a T04E or T25 though not the specs. for a 3.4

[Turbo V6 Camaro]

Re: Turbo Confusion

this size turbo was perfect fo my application, also I got a small exhaust trim AND a ball bearing turbo, I expect to put down some ridiculous 60' times.

going ot need a big stall or trans brake :) :)

[UDLOSE98]

Re: Turbo Confusion

going ot need a big stall or trans brake :) :)

trans break ftl, ive decided on a 3800 stall, that'll do the trick

EDIT : just bought a 4000 stall today

[3.4 slow to go]

Re: Turbo Confusion

I've been doing research for a future 3.4 project and have read turbos l,ll&lll. I have a good undestanding of the basics but find the "turbo sizing" somewhat overwhelming. I relize that for a given engine, turbo selection can be based on use: low boost everyday driving,hp street driving and all out topend. There is a guy at thirdgen.org that post a 12.6 sec. 1/4 mile using a T04E [50 ar int / 63 ar exh / 57 lll trim] @ 16 psi;then I've seen T60 & T70's touted as "the one" to use. Could you generate the same power at a lower boost with the "bigger" turbo and turn the same et ?

you forgot to mention he was running a 2.8 :wavey:

[Puffadder]

Re: Turbo Confusion

No,he said it was a 3.1;I'm thinking that a T04E might be right for my needs but with a different trim. I'm still in the research faze and don't know much more than the basics but I'm picking up a more info everyday. I'm beginning to think that the maps get you into the ballpark but seeing the results someone got with a turbo on the same engine will get you what you need to make that final choice.

[iGoRa]

Re: Turbo Confusion

kind of yes and no , you are forgetting manufacture here , the map that you are looking at : Garrett T70 shows that T70 is too big fot application , and probably is , but MP T70 spools just right. I think its little bit smaller than Garrett but there is no prove since a compresor map for MPT70 is not available.
for 3.4 the one that I would go is 60-1 it should flow more than enough.

[Turbo V6 Camaro]

Re: Turbo Confusion

kind of yes and no , you are forgetting manufacture here , the map that you are looking at : Garrett T70 shows that T70 is too big fot application , and probably is , but MP T70 spools just right. I think its little bit smaller than Garrett but there is no prove since a compresor map for MPT70 is not available.
for 3.4 the one that I would go is 60-1 it should flow more than enough.

the MP T-70 is smaller the wheels are different size's

and trans brakes ftl? are you a retard?

[iGoRa]

Re: Turbo Confusion

the MP T-70 is smaller the wheels are different size's

and trans brakes ftl? are you a retard?

[Turbo V6 Camaro]

Re: Turbo Confusion

i was talking to udlose guy in the second part