.68 or .96ar for 5.3
12-09-2007, 06:42 PM
#1
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.68 or .96ar for 5.3
hey guys i was wondering witch turbo would it work beter with my 2006 5.3 silverado front mount custom made turbo mount - power master t70 .68 or.96ar and up to how much boost will i will put with intercooler and a gt2-3 cam how much rwhp ,thanks for your help
Last edited by mike06tork; 12-09-2007 at 06:48 PM.
12-09-2007, 07:57 PM
#2
I am using a .68 on a 60-1 and I love it. 400rwtq at 2500RPM
... but I am (currently) using a stock torque converter so I am able to capitalize on the smallish turbo. If you are going to the effort of a cam (that will help in the upper RPM range) then I might go with a little bit bigger AR. You certainly won't lose much down low. How YOU want the power delivery to be may take a little tweaking on AR and/ or torque converter. Just my 2 cents 
Bill
... but I am (currently) using a stock torque converter so I am able to capitalize on the smallish turbo. If you are going to the effort of a cam (that will help in the upper RPM range) then I might go with a little bit bigger AR. You certainly won't lose much down low. How YOU want the power delivery to be may take a little tweaking on AR and/ or torque converter. Just my 2 cents Bill
12-09-2007, 10:58 PM
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I used to have the 60-1 with a .68 my power dropped off at 5200. I now have a mpt70 with the .96 the engine pulls a lot harder on the top end all the way to 6000. I plan to install my gt2-3 in the next few days. Go with the .96.
12-09-2007, 11:14 PM
#4
not much diference between the two. here is a prety good test for just what you are doing >> https://www.performancetrucks.net/fo...highlight=mp70
12-10-2007, 06:12 AM
#5
I purposefully sacrificed top end to maintain the feeling of instant torque... for my daily driver. If you have a dyno graph comparing the 2 turbo's I would be genuinely interested to see it Also, I would to see some discussion on turbine size... P, Q, S Trim and so forth.
Bill
12-10-2007, 09:34 AM
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I only have dynoed it one time and that was with the 60-1, a 45 shot and 11-12psi. The torque peaked 597 at 4800 and the horsepower was 546 at 5200. The truck would only hit 107mph in the quarter. I liked the instant torque the only problem was I was always in boost. Just barely tip in at 65 and it was in boost. I had to play with the timming tables a lot and reenable burst knock to keep it from pinging at 60-80mph when accelerating at light throttle. I do get better gas miledge now that it doesn't boost every time I speed up.
12-10-2007, 01:10 PM
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hey guys i already have a cam but not turbo cam its a 222/224 566/568 112 lsa can i still try it and see how it works so a bigger a/r is better with a cam or what
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12-10-2007, 03:23 PM
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i have a cold air but not good for the turbo but im putting a intercooler and i have 3.73 electric fans and no stall yet what should i get 3000 or what lose stall. and what do you mean by looser ar. and how can i keep back pressure down im new to the fi induction