422 LSX w/ Twin PT76's on KYTP kit
05-07-2011, 10:54 AM
#61
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So at
19# of boost on your motor its 1.03# of Co2/Spring per # of boost at 19#
25# of boost on this motor is 1.17# of Co2/Spring per # of boost at 25#
25# of boost on my motor is 1.14# of Co2/Spring per # of boost at 25#
As boost increases the # of Co2/Spring is going to increase to fight the pressure on the face of the valve(backpressure)
19# of boost on your motor its 1.03# of Co2/Spring per # of boost at 19#
25# of boost on this motor is 1.17# of Co2/Spring per # of boost at 25#
25# of boost on my motor is 1.14# of Co2/Spring per # of boost at 25#
As boost increases the # of Co2/Spring is going to increase to fight the pressure on the face of the valve(backpressure)
05-07-2011, 11:04 AM
#62
So it will just keep going up? At what point do you know the turbos are out of steam, as far as back pressure goes? I'm very curious to see where these turbos are going to peak at. I have a feeling these are at their peak right now. I think pressure is going to increase from this point.
05-07-2011, 11:05 AM
#63
So it will just keep going up? At what point do you know the turbos are out of steam, as far as back pressure goes? I'm very curious to see where these turbos are going to peak at. I have a feeling these are at their peak right now. I think pressure is going to increase from this point.
05-07-2011, 11:45 AM
#67
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No, just that 1.4 is the max we've seen in the 26-30 psi zone on the TC's and Los was getting 1.9x...could be the extra 2mm in the comp wheel causes issues...
Keep cranking the boost until the mph doesn't go up or the head gasket pops!
Keep cranking the boost until the mph doesn't go up or the head gasket pops!
05-07-2011, 04:47 PM
#69
I bent a crank, Steve's busted 2 sets of cam bolts and Bonnar's busted a ringland on high compression pistons but all the headgaskets have looked good on teardown.
05-07-2011, 06:37 PM
#70
To be honest, I'm not sure what the goals are at this point. I'm guessing it's the same as always, go faster and make sure that the local Ford guys don't catch up.
The TC78's combo worked well. I don't think "optimized" is the right word though. I think that the TC78's would rather be on a slightly smaller motor. Last I heard was that BonnarLS1 was going to be trying them on his 380ci LS3 setup. I think they will like that much better. He currently has the MPT70's on his car. We likely wont ever see them go max effort on his car because he's
The TC78's combo worked well. I don't think "optimized" is the right word though. I think that the TC78's would rather be on a slightly smaller motor. Last I heard was that BonnarLS1 was going to be trying them on his 380ci LS3 setup. I think they will like that much better. He currently has the MPT70's on his car. We likely wont ever see them go max effort on his car because he's
09-16-2011, 05:27 PM
#73
He had this made recently as well as getting the cold side pipe diameter increased to match the turbo outlet of 3".
He had a good amount of work done to the IC support in the nose in order to use the space a bit more efficiently with relocated tabs for the IC, transcooler, and oil cooler. I believe that the IC had a 3" inlet and a 4" out let. Now it is 4" all the way from the (2) 3" merge to the 90mm Throttle body.
He had a good amount of work done to the IC support in the nose in order to use the space a bit more efficiently with relocated tabs for the IC, transcooler, and oil cooler. I believe that the IC had a 3" inlet and a 4" out let. Now it is 4" all the way from the (2) 3" merge to the 90mm Throttle body.
Last edited by 98Z28CobraKiller; 09-16-2011 at 05:33 PM.
09-17-2011, 11:26 AM
#75
It can't suck in due to the divider in the center but the filter is removed for the track. It's mostly for street cruising. He just figured out a major electrical issue that was not allowing us to get any testing done at the track with the new turbos or any of the other fab changes. Hope to be out there doing some testing soon again.
09-17-2011, 08:22 PM
#78
It can't suck in due to the divider in the center but the filter is removed for the track. It's mostly for street cruising. He just figured out a major electrical issue that was not allowing us to get any testing done at the track with the new turbos or any of the other fab changes. Hope to be out there doing some testing soon again.
What issue did y'all have?
09-22-2011, 11:12 AM
#80
It turns out that when he had the cold side plumbing enlarged, the welder took off all the ground for the battery. We have a bunch of grounds on our cars and Steve has all the wiring hidden really nice. Well when he reconnected the grounds, the main ground for the Holley computer fell back behind the battery. When he ran the car down the track, he's pretty sure that computer found ground thru the EGT module. After 2 weeks of banging his head against the wall, tracing wires, swapping ECUs and the main harness, he stripped it back to the bare bones and figured out the short that was killing all the 5V sensors on the launch.
So fast forward to yesterday, we finally got the car out to the track. On the second pass at about 1/8 mile, one of the trans cooler lines either split or came apart at or near the transmission, hit the exhaust flames and turned the fire chicken into a full on pheonix. Right rear quarter was fully engulfed. By the time he got her stopped, the fire had come in the car and the passenger seat and headliner were on fire. He grabbed the laptop off the passenger seat and tossed it out of the car as he was getting out just in time for the rescue crew to run it over. So, like they say, when it rains, it pours. The good news is that the dash and everything forward did not get any damage. Looks like he will just need a headliner, center console, passenger seat, passenger door skin, and the molding pieces on the passenger side for the interior. Exterior will need a rear bumper cover, tail lights, rear hatch and a full paint job. I'll post video and pictures in a few days.
So fast forward to yesterday, we finally got the car out to the track. On the second pass at about 1/8 mile, one of the trans cooler lines either split or came apart at or near the transmission, hit the exhaust flames and turned the fire chicken into a full on pheonix. Right rear quarter was fully engulfed. By the time he got her stopped, the fire had come in the car and the passenger seat and headliner were on fire. He grabbed the laptop off the passenger seat and tossed it out of the car as he was getting out just in time for the rescue crew to run it over. So, like they say, when it rains, it pours. The good news is that the dash and everything forward did not get any damage. Looks like he will just need a headliner, center console, passenger seat, passenger door skin, and the molding pieces on the passenger side for the interior. Exterior will need a rear bumper cover, tail lights, rear hatch and a full paint job. I'll post video and pictures in a few days.