Author Topic: turbo size  (Read 2120 times)

Offline chuckd

  • Sr. Member
  • ****
  • Posts: 292
turbo size
« on: June 25, 2013, 06:43:53 AM »
Good morning all:  I asked for and received advice on how to enhance the performance of my 79 6V92. Clifford et al, was helpful, but I do not have enough knowledge to put in play what was suggested i.e.  I presently have a Garrett TV8102 with a/r ratio of 1.23, what Clifford suggests and what I will do is to change to a Garrett TV7512, but my issue is I think Clifford wants a a/r ratio of 1.95.  Is their another way of describing that ratio, i.e. a number for the intake and exhaust i.e..76 and .95 or ?  Where is the a/r ratio noted on the turbo?  I can find lots of TV7512s, just not the 1.95 ration - at least I think that is my problem.  Any help would be appreciated.

Chuckd - who is way to smart to not do what Clifford says.
1979 Prevost Stillwater Mn

Offline lostagain

  • Hero Member
  • *****
  • Posts: 2505
  • MC5C
Re: turbo size
« Reply #1 on: June 25, 2013, 07:55:56 AM »
I recently replaced the turbo on my 6V92 with a TV7512 with an A/R of 1.23 . Also 9G90 injectors set at 1.46". That gives me 350 HP and 1050 lb/ft (on paper at least). Great improvement! I pass all the transport trucks up the hills, except the empty ones. Really flattens the little hills on the hwy.

JC
JC
Blackie AB
1977 MC5C, 6V92/HT740

Offline luvrbus

  • Hero Member
  • *****
  • Posts: 19532
Re: turbo size
« Reply #2 on: June 25, 2013, 08:09:03 AM »
The A/R is stamped inside the hot housing the turbo needs to be removed to see the numbers what injectors do have ? we are sorta of limited here on what we can do with your green engine and get good service from it I wouldn't take to 350 hp
« Last Edit: June 25, 2013, 08:12:05 AM by luvrbus »
Life is short drink the good wine first

Offline chuckd

  • Sr. Member
  • ****
  • Posts: 292
Re: turbo size
« Reply #3 on: June 25, 2013, 10:49:36 AM »
Clifford in a previous post you recommended 9g85 injectors, which is what I will use.

Offline luvrbus

  • Hero Member
  • *****
  • Posts: 19532
Re: turbo size
« Reply #4 on: June 25, 2013, 10:53:14 AM »
That will work where do want your torque range,low end, mid range ,or top end tell us and we will adjust the hot housing for your needs 

You have a by pass blower ?

good luck
« Last Edit: June 25, 2013, 11:51:29 AM by luvrbus »
Life is short drink the good wine first