Turbo Spooling #'s!!
08-15-2007, 09:36 PM
#1
Turbo Spooling #'s!! I just got done putting in 2- 3in. cutout's on my exhaust this evening. With them open i can actually hear the turbo's,but will they spool quicker!!! Also what kinda extra power do you guy's think i can expect from the cutout's being open.Thank's in advance! 
08-15-2007, 09:45 PM
#5
Originally Posted by quicksilverado
They should spool quicker Chris. You may want to keep an eye on the wideband. Cutouts usual change the a/f ratio.
08-15-2007, 09:53 PM
#6
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The power will definately go up. How much is a good question. The dyno will let you know. Are the cutouts electric? I wanted a boost activated cutout like Jerry had, but they are back ordered to forever.
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08-16-2007, 01:18 PM
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Originally Posted by kp
its too hot to do anything - good FI weather soon 
08-16-2007, 08:32 PM
#13
Originally Posted by smokinHawk
on my butt dyno with my old tti street kit i think it was around 75rwhp opening it up.
i tuned it for open, then drove it around closed and opened it up when i wanted to romp on it and had no problems.
i tuned it for open, then drove it around closed and opened it up when i wanted to romp on it and had no problems.
08-16-2007, 09:11 PM
#15
Originally Posted by smokinHawk
on my butt dyno with my old tti street kit i think it was around 75rwhp opening it up.
i tuned it for open, then drove it around closed and opened it up when i wanted to romp on it and had no problems.
i tuned it for open, then drove it around closed and opened it up when i wanted to romp on it and had no problems.
Originally Posted by HUNTER02SS
Wow! 75rwhp gain and that was on a rear mount. If I could gain that i will be over the 800rwhp mark at 12psi!!! Will find out tommorrow tonight. Oh, I have 2 electric cutout's and only one work's. Brand new also. The other one blow's fuses and want's to burn up the wire.i took them back off and just going to do it manually with plate's as the block off until i get the electrical issue figured out.
If you tune for them being open, in my experience with a restrictive, quiet catback, the car will be too rich to even pull through. When I was playing with PE vs RPM, it would take 3-4 psi to get back to the same a/f with the cutout closed compared to open.
08-16-2007, 09:22 PM
#16
Originally Posted by 2000 Tran Zam
yes, definately dont go WOT with out retuning... thats how I blew my motor 
Mike
08-16-2007, 09:23 PM
#17
Originally Posted by ABeasst
I've got a cutout on my I-pipe and I gain 50-60HP over the hooker catback. This is on a 600HP car.
08-16-2007, 09:24 PM
#18
I was told that when I close the cutout's that it would be running richer.it is going to be tuned for them to be opened,. I will have them closed when the wife ride's with me so she won't complain,but it sound's good to me,and i can even here the turbo's now!
08-16-2007, 09:25 PM
#19
KP, i have been hiding in the a/c...its almost too hot to ***** and it IS too hot to ***** for long 
its been 100 here lately....its 10:30pm and its 90 degrees NOW. I figure mid/late september before we hit the track again. Gotta try out this 3.08 gear
its been 100 here lately....its 10:30pm and its 90 degrees NOW. I figure mid/late september before we hit the track again. Gotta try out this 3.08 gear
08-16-2007, 09:27 PM
#20
Originally Posted by engineermike
Me too. Seems that sometimes, when you relieve backpressure after the turbine, the boost jumps up quite a bit. I went from 18 to ?? psi and blew both head gaskets so bad that it hydrolocked the motor. And that's with 5 bolts per cylinder. . .
Mike
Mike