Went to the dyno.
#23
The original maggie injectors are 42#. You will need to step up to 60# in my opinion. Also the heat that the Radix produces kills your power up top.
On my truck, which is essentially the same thing as yours with a Radix w/ 3" pully, SW long tubes, true dual 3" exhaust, CAI, 180 Tstat and tune I was putting down 464rwhp and 518rwtq. My injectors were at 107% and it got up into the 12.5 range in the AFR. The heat that thing produces is killing you and honestly the Radix is on the small side for the LQ9.
On my truck, which is essentially the same thing as yours with a Radix w/ 3" pully, SW long tubes, true dual 3" exhaust, CAI, 180 Tstat and tune I was putting down 464rwhp and 518rwtq. My injectors were at 107% and it got up into the 12.5 range in the AFR. The heat that thing produces is killing you and honestly the Radix is on the small side for the LQ9.
#24
OP - What size wheels did were you running on the dyno?
What psi were you at with the 3" pulley? What pump and injectors are you running now?
The original maggie injectors are 42#. You will need to step up to 60# in my opinion. Also the heat that the Radix produces kills your power up top.
On my truck, which is essentially the same thing as yours with a Radix w/ 3" pully, SW long tubes, true dual 3" exhaust, CAI, 180 Tstat and tune I was putting down 464rwhp and 518rwtq. My injectors were at 107% and it got up into the 12.5 range in the AFR. The heat that thing produces is killing you and honestly the Radix is on the small side for the LQ9.
On my truck, which is essentially the same thing as yours with a Radix w/ 3" pully, SW long tubes, true dual 3" exhaust, CAI, 180 Tstat and tune I was putting down 464rwhp and 518rwtq. My injectors were at 107% and it got up into the 12.5 range in the AFR. The heat that thing produces is killing you and honestly the Radix is on the small side for the LQ9.
#26
#28
Which MagnaCharger do you have? Made any Track passes? I've never been on a dyno, but have run a 12.6 @106 at full weight and DR's with the same setup you have (TVS1900 w/3" pulley)
#29
Well I went to adifferent dyno today(mustang). One first pull he did it came back with 418hp he did about 2 more and let it cool some. After that he did 2 more and came back 376hp. Anyways he was data logging it and have a wideband on the exhaust not a sniffer at the tail pipe. He got 10.2AFR. so I guess it needs to twiked alittle bit. I guess now that my wideband is off and by a lot. Good thing is that I am running on the rich side and not lean. He said once he twiks it it will probably be close to if not in the 400hp. I'm just glad that its not a fuel problem but a tuning problem.
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03regcab sierra
Dynamometer Results & Comparisons
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Aug 3, 2015 12:11 AM





