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Projected horsepower

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Old 09-28-2024 | 09:17 AM
  #761  
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Congrats!! You will get to the 10s easily, even just shaving a 1/10th off the 60' and you're there . You're mph shows more potential
Old 09-28-2024 | 10:19 AM
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I think I'm going to get rid of the boost controller and get a boost pressure sensor so I can control the boost off the holley. The boost controller doesn't seem to be as accurate as the holley and I feel like I don't need it anymore. I'm just not to sure how to do it. I also had 2 different people tell me different things, 1 suggest 1 put traction control and the other suggest I pull timing off the line. What do you guys think i should do to get the 60 foot down? When I'm on the 2 step i was building around 4-5 psi and as soon as I hit the gas it instantly hits 19-20 psi and spins the **** out of the tire, it's violent off the line so im sure that's my issue
Old 09-28-2024 | 10:53 AM
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I don't know anything about the holley or any real boost strategies but my basic approach would be to reduce the 2 step rpm and if you're boost controller has what aem calls a Crack pressure setting reduce that until you don't spin , if that doesn't provide the 60' you want then you'll have to work on traction before you can put down more power early in the run. FWIW my trucks best 60' so far was 2500 rpm on foot brake, still in vacuum and crack pressure at 3.5 lbs , any higher on either of those results in spin . Probably could work on the traction some more but worried a bit about the 12 bolt truck diff as I have broken it before and doing a 9' and 4 link would cost as much as my whole truck - not for me
Old 09-28-2024 | 12:05 PM
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Originally Posted by GMCGreg
I don't know anything about the holley or any real boost strategies but my basic approach would be to reduce the 2 step rpm and if you're boost controller has what aem calls a Crack pressure setting reduce that until you don't spin , if that doesn't provide the 60' you want then you'll have to work on traction before you can put down more power early in the run. FWIW my trucks best 60' so far was 2500 rpm on foot brake, still in vacuum and crack pressure at 3.5 lbs , any higher on either of those results in spin . Probably could work on the traction some more but worried a bit about the 12 bolt truck diff as I have broken it before and doing a 9' and 4 link would cost as much as my whole truck - not for me
the boost controller i have is the turbosmart e boost 40. I'm not sure if it has that or not, i know it has boost by gear and it's wired for it but I'm not to sure how to set it up and I have my gate pressure on the controller set at 10 psi. Also I launched it around 2800 rpm.
Old 09-28-2024 | 03:05 PM
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Had a look at the instructions for that controller, the GP1 setting is essentially the same as the Crack pressure on my aem . If you're spinning a little off the line , as boost comes up, not right at the line . Then I would reduce that number until traction holds . Will take some practice at the track playing with starting line rpm and boost control to find the sweet spot . Holley can do boost by rpm too can't it ? That may be worth playing with or boost by time . I'm sure others can help with a strategy there
Old 09-28-2024 | 04:50 PM
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Originally Posted by GMCGreg
Had a look at the instructions for that controller, the GP1 setting is essentially the same as the Crack pressure on my aem . If you're spinning a little off the line , as boost comes up, not right at the line . Then I would reduce that number until traction holds . Will take some practice at the track playing with starting line rpm and boost control to find the sweet spot . Holley can do boost by rpm too can't it ? That may be worth playing with or boost by time . I'm sure others can help with a strategy there
oh ok I'll drop that number then, i have it at 10 psi and the controller can do boost by rpm as well. I just really arent to sure how to use it. Its wired up for it though because i wired as it when i installed it. I just figured the holley was more accurate and probably easier to setup.
Old 09-30-2024 | 10:36 AM
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Boost by time might be another avenue, leave on 5-6 lbs. then ramp to full boost after 3-4 seconds.
This is my plan once I get to the track eventually.
Spicy MPH too, easily a 10 second truck.
Nice work!
Old 09-30-2024 | 12:33 PM
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Originally Posted by The ******
Boost by time might be another avenue, leave on 5-6 lbs. then ramp to full boost after 3-4 seconds.
This is my plan once I get to the track eventually.
Spicy MPH too, easily a 10 second truck.
Nice work!
he wants to hook up a speed sensor adapter to the transmission and says we will use the abs sensors from the front tires to compare wheel speed and also hook up and viair air tank, a second mac valve, and a dome pressure sensor so he can monitor and control boost directly from holley and doing away with the boost controller. He says I'll be much more accurate like this, and thanks man. It was pulling hard on the top end, rpm was shifting around 7100 and maybe dropped slightly below 6 between shifts. It definitely spun it's *** off on the line. I did add the traction bars on the rear so I figured I might could tighten them up a bit as well.
Old 09-30-2024 | 04:44 PM
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All good choices on getting you there with boost control and keeping it all in one place. Great 1st outing!

I'd say you have a deep 10 in there when you get the 1st 660' figured out (there is certainly improvement in there). For reference my TBSS went 10.6x @128 making around 680-700whp, it's been a minute but I think I was around 4625# race weight.
Old 09-30-2024 | 05:33 PM
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Originally Posted by ALL ULL C
All good choices on getting you there with boost control and keeping it all in one place. Great 1st outing!

I'd say you have a deep 10 in there when you get the 1st 660' figured out (there is certainly improvement in there). For reference my TBSS went 10.6x @128 making around 680-700whp, it's been a minute but I think I was around 4625# race weight.
yes hopefully so, that's what my tuner is telling me too, it made 754 on 20 psi and it read 19.8 psi when I made the pass but I just don't think the boost controller is to accurate. when i drove it there i hit the gas and it tried to make 24 psi and we hadnt changed anything but it was much cooler that day. Im hoping getting the boost to stay accurately at 20 psi and getting my lauch together will help tons. Im not sure on the race weight as ive never weighed the truck but its a 2000 silverado single cab and i havent done anything to change the weight. It has full interior, ac, power steering so nothing has been removed as far as that goes.
Old 10-04-2024 | 07:44 PM
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Well that was fun while it lasted, it you guys knew me personally you would understand why this is so frustrating. Man i take damn good care of my truck and im the guy driving 40 mph in the slow lane with a 750 hp truck. I had a meeting to attend with my company so i decided to drive the truck just so i could take it out and i noticed my hot oil pressure was 45 psi and its usually 60, by the time i got to my destination idle pressure was 20 psi, when i drove home it would come back up to around 35-40 while driving and by the time i made it home idle pressure was around 15 psi and the oil gauge was flickering. I was hoping oil pressure sensor or pickup tube o ring so I changed the sensor and drained the oil and I noticed the oil looked to have a sparkle or haze to it so I cut the oil filter open and to my finding is what you see. I guess the gen 3 block, rods, & pistons couldn't handle 750. So back to square 1, do i go out and get a gen 4 short block that already has pistons and rods, do I go pull a 5.3 from the junkyard and put gen 4 pistons and rods in it, or do I pull my motor and put gen 4 pistons and rods in it?
Old 10-05-2024 | 12:04 AM
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Unfortunately, you already know it will be impossible to determine the correct next step until you pull it and see what the damage truly is. That is, unless you suddenly become wealthy enough to just buy a new fully forged replacement motor, of course.
Old 10-05-2024 | 04:49 AM
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Originally Posted by gametech
Unfortunately, you already know it will be impossible to determine the correct next step until you pull it and see what the damage truly is. That is, unless you suddenly become wealthy enough to just buy a new fully forged replacement motor, of course.
yeh I know, it just trying to determine which rout i should go.
Old 10-05-2024 | 07:22 AM
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Sorry to hear it , man you have no luck at all. If you've got a place you can disable it for a while you might as well pull it and investigate what happened, could have started with the vavle train . Too bad cause probably getting into good driving weather down there , up here you'd be saying - oh well got all winter to get it fixed . Keep us updated
Old 10-05-2024 | 11:38 AM
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Originally Posted by GMCGreg
Sorry to hear it , man you have no luck at all. If you've got a place you can disable it for a while you might as well pull it and investigate what happened, could have started with the vavle train . Too bad cause probably getting into good driving weather down there , up here you'd be saying - oh well got all winter to get it fixed . Keep us updated
ita still running and driving ok so im hoping the drive train is OK. My tuner thinks it's the crank bearings. He wants me to pull the motor and bring the block to him and he has a few cranks on the shelf if the crane is damaged and he has gen 4 rods and pistons, but I also found a guy selling a 5.3 from a 2006 Tahoe for $600, and I'm pretty sure its a gen 4 motor because the knock sensors are on the side and i believe it's the cam sensor that's on the timing cover. The only down fall is it has 200,000 miles on it so I may get it and it may have issues as well so I may just go the route of rebuilding my motor.
Old 10-05-2024 | 12:51 PM
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I'm just going to put gen 4 rods and pistons with arp rod bolts in my block. Is it better to pull the heads first and then pull the shortblock or pull the whole long block assembled?
Old 10-05-2024 | 01:58 PM
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Should come out easily enough with the heads still on , will save some over the fenders work . Is all that metal aluminum or steel (check with magnet) still curious what failed first. Guys bend gen3 rods without the bearings failing . Read back a bit and see the dyno graph falling off pretty hard around 6400 , not sure if they let off at that point or not . You said you shifted at 7100 ? That may be a bit higher than optimal, experimenting at the track when you get back to it will tell. My lq4 had 180k miles when I started and added another 32k since if that helps with your decision making
Old 10-05-2024 | 02:33 PM
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Originally Posted by GMCGreg
Should come out easily enough with the heads still on , will save some over the fenders work . Is all that metal aluminum or steel (check with magnet) still curious what failed first. Guys bend gen3 rods without the bearings failing . Read back a bit and see the dyno graph falling off pretty hard around 6400 , not sure if they let off at that point or not . You said you shifted at 7100 ? That may be a bit higher than optimal, experimenting at the track when you get back to it will tell. My lq4 had 180k miles when I started and added another 32k since if that helps with your decision making
ok I put a magnet on them and it doesnt jump onto the magnet but if i touch the magnet on the filter it does stick to the magnet. A few of the pieces I notice look a little discolored like almost a bronze color, but it's very little of those. Most are all shiny silver
Old 10-05-2024 | 03:05 PM
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I'd pull the whole longblock. Maybe it was time for that miled up engine.

I'm not going to look at my SBE's oil until after my next outing lol.
Old 10-05-2024 | 05:42 PM
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Originally Posted by Pro Stock John
I'd pull the whole longblock. Maybe it was time for that miled up engine.

I'm not going to look at my SBE's oil until after my next outing lol.
that's what I'm going to do, it was still running and pulling normal, no strange noises or anything. I just knew it always had really good oil pressure so that was a major sign for me, and ive changed every damn thing in this truck except the pistons and rods(bottom end) and it would be the one thing i haven't changed that failed on me. Smh, never ends man. I've already started ripping it apart. I'll get it back up and running soon. This truck will not defeat me.
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