Building a sequential turbo system
#141
LS1Tech Sponsor
iTrader: (65)
Still having the leaking issue? WHere exactly does it leak from and does it leak when the car sits?
__________________
Featuring 6 different turbo kits for your F-body!
Check us out on Facebook at: www.facebook.com/HuronSpeed
Featuring 6 different turbo kits for your F-body!
Check us out on Facebook at: www.facebook.com/HuronSpeed
#142
hey speed, more good work mate.
have you got the sequential part of the system working yet?? also what are you using as peramiters to switch the system from single to twin??
thanks Chris.
have you got the sequential part of the system working yet?? also what are you using as peramiters to switch the system from single to twin??
thanks Chris.
#143
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
Speed has allowed me to go for a ride in this car and may I say holy **** this car runs good and the craftsmanship is awesome. It will easily hand my car its *** when its all said and done. Now I will have to get a 9lb pully and hope I can at least keep from embarrassing myself . Hey buddy keep up the good work and let me know on that clutch when your ready to install!
I'm going to swap the clutch and rebuild the trans this weekend. I probably won't start on it until Friday afternoon, depending on when the parts land.
Originally Posted by Superman09
Still having the leaking issue? WHere exactly does it leak from and does it leak when the car sits?
Originally Posted by chuntington101
hey speed, more good work mate.
have you got the sequential part of the system working yet?? also what are you using as peramiters to switch the system from single to twin??
thanks Chris.
have you got the sequential part of the system working yet?? also what are you using as peramiters to switch the system from single to twin??
thanks Chris.
#145
LS1Tech Sponsor
iTrader: (65)
Ok so you run a .016 at each turbo now and its still getting enough? Thats cool. I would like to do the accumulator, but i can't find anyplace lower than the turbo to mount it.... i'll keep plugging away, glad you got your issue worked out!
__________________
Featuring 6 different turbo kits for your F-body!
Check us out on Facebook at: www.facebook.com/HuronSpeed
Featuring 6 different turbo kits for your F-body!
Check us out on Facebook at: www.facebook.com/HuronSpeed
#147
9 Second Club
iTrader: (27)
Join Date: Apr 2003
Location: HOUSTON-TX
Posts: 3,685
Likes: 0
Received 0 Likes
on
0 Posts
I got to check out the car in person and do some rolling burnouts/brake boosting
its crazy how everything fit in such a tight space.
it spools fast, way under 3000 rpms. once the sequential system is in place it will be insane...
looking forward to seeing how it reacts to the added timing
its crazy how everything fit in such a tight space.
it spools fast, way under 3000 rpms. once the sequential system is in place it will be insane...
looking forward to seeing how it reacts to the added timing
#148
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by chuntington101
any updates speed??????
As far as the turbo, I've been playing with the tuning a little bit and it runs very good for the 6ish lbs it's putting down. I got my wideband installed and have been using that to get a good solid/safe street tune before taking it to the dyno. I would be pretty damn happy if I can put down 500 to the tires on 6psi and pump gas on a semi-conservative tune. I really have no expectations but I'm hopeful.
#150
good work speed,
quick question on the sequential bit. what are you going to be using to actualy open the gate to the second turbo??? will it be presure (say set to open as full PSI is reached), and enginer RPM point, throttle possition, or a combination????
thanks Chris.
quick question on the sequential bit. what are you going to be using to actualy open the gate to the second turbo??? will it be presure (say set to open as full PSI is reached), and enginer RPM point, throttle possition, or a combination????
thanks Chris.
#151
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Pro Stock John
I read the thread, sounds like your kit is working great!
Originally Posted by chuntington101
good work speed,
quick question on the sequential bit. what are you going to be using to actualy open the gate to the second turbo??? will it be presure (say set to open as full PSI is reached), and enginer RPM point, throttle possition, or a combination????
thanks Chris.
quick question on the sequential bit. what are you going to be using to actualy open the gate to the second turbo??? will it be presure (say set to open as full PSI is reached), and enginer RPM point, throttle possition, or a combination????
thanks Chris.
#153
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by ChevyChad
If it ain't broken, it ain't complicated enough! Good lord Bryan, I need to see this in person so you can explain it all to me! Makes my setup look like it was designed by a kindergartner When is it gonna be ready for a little road trip?
Isn't that the fricken truth! lol. The sad thing is I'll bet you are still faster than I am
I think some of the OKC guys are heading up for a calendar shoot next weekend. If I'm wrapped up, I might tag along.
#154
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
Got a few results for you guys. I ran a tri-event this week consisting of back to back road race, drag race, and autox last week. Hell of a lot of work but a HELL of a lot of fun. Anyway, the car wasn't setup particularly well for any of the events. The suspension, alignment, etc was setup for turning and the tires, well, not for anything really lol.
I was running 285 Nitto 555 street tires all the way around. Good tires over all but not an R compound or drag radial by any means. It liked to push into the corners and spin down the strip. Anyway, I'm sure the drag times is what everyone will best relate to so...
I made 4 passes that night. Best ET on the night was 12.82@118.63 at 7psi on a 2.318 60' and best mph was a 12.98@120.53 on a 2.405 60'. Launching low would bog it and anything even remotely resembling boost would turn the track into a spinfest. That was a little over 8psi. It was pretty fun dancing it at 1/2 track (track prep was **** and DA was horrible anyway). The ETs suck but I wasn't expecting to run very well with that on the suspension. I was going to soften the Koni's up all the way on the front to help with the launch but ran late and didn't get a chance to finish it up.
The one run I was able to log, my afr was floating around mid 10s and it maxed the graph on the maf at ~58lbs/min. Supposedly they are capable of reading up to 67 so I adjusted the scanner config and work on it.
Some bugs I'm fighting is the PCV system which I had just moved from the intake to the front of the secondary turbo. It's not getting any obvious blow by so it seems like the boost is getting into the block somewhere. I've also got a boost leak somewhere since my spool time has dropped 1000rpm. All in all, the results show some promise. I think I'm going to swap to an SD tune next week.
I'll let everyone know how shes doing as anything interesting happens!
I was running 285 Nitto 555 street tires all the way around. Good tires over all but not an R compound or drag radial by any means. It liked to push into the corners and spin down the strip. Anyway, I'm sure the drag times is what everyone will best relate to so...
I made 4 passes that night. Best ET on the night was 12.82@118.63 at 7psi on a 2.318 60' and best mph was a 12.98@120.53 on a 2.405 60'. Launching low would bog it and anything even remotely resembling boost would turn the track into a spinfest. That was a little over 8psi. It was pretty fun dancing it at 1/2 track (track prep was **** and DA was horrible anyway). The ETs suck but I wasn't expecting to run very well with that on the suspension. I was going to soften the Koni's up all the way on the front to help with the launch but ran late and didn't get a chance to finish it up.
The one run I was able to log, my afr was floating around mid 10s and it maxed the graph on the maf at ~58lbs/min. Supposedly they are capable of reading up to 67 so I adjusted the scanner config and work on it.
Some bugs I'm fighting is the PCV system which I had just moved from the intake to the front of the secondary turbo. It's not getting any obvious blow by so it seems like the boost is getting into the block somewhere. I've also got a boost leak somewhere since my spool time has dropped 1000rpm. All in all, the results show some promise. I think I'm going to swap to an SD tune next week.
I'll let everyone know how shes doing as anything interesting happens!
#155
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
Welllllllll I solved the problem of the slow spool. After the rather anemic times from the track, I'm wondering who thinks this might cause a problem?
oops!
Looks like I must have put the thrust bearing assembly together wrong and it allowed the compressor wheel to walk forward and hit the housing. That in turn threw off the balance and proceeded to own the bearings which allowed the shaft to move around in the bearing housing allowing both the compressor and turbine wheels to impact the housings. Turbine didn't look bad (free high rpm clip job) but that compressor wheel is about to become a clock.
Didn't appear to hurt the engine but I'm going to pull the intercooler down to make sure there aren't any pieces inside it. The dead secondary turbo made no noise so I'm guessing it wasn't doing much. I'm thinking the debris from the compressor wheel came off as fine dust and hopefully blew out of the exhaust. I see no evidence of blow by, nothing in the oil (including fuel), and there was no damage to the turbine blades that would indicate a chunk of aluminum flying through. I'm going to check the IC just in case.
On the flip side, I'm fairly impressed that the primary turbo, running on slightly less than 1/2 the exhaust flow managed to put down those MPHs despite the terrible spool time. I converted over to speed density this weekend before I found the dead turbo and it was making 143kpa max (139-142 on average when it finally did spool) which would be somewhere around 6.25psi of boost. I could hear the wastegate open at ~4k and HPTuners shows the boost peaking near that range as well (~3800-3900). This down from 2400 when I first assembled the system.
With all the problems, 12.80s and 120+ trap speeds feel pretty good at around that boost level. I was making a tad more with the open cutout but my gauge is inaccurate (sits at 1psi with the car off).
I'm going to replace the gauge, install the new turbo, soften the front struts, and put some real tires on the back and see what it could do. I'm hoping for full boost of around 9psi below 2500 from a 4th gear roll on which should let me keep it under boost the whole way down the track.
oops!
Looks like I must have put the thrust bearing assembly together wrong and it allowed the compressor wheel to walk forward and hit the housing. That in turn threw off the balance and proceeded to own the bearings which allowed the shaft to move around in the bearing housing allowing both the compressor and turbine wheels to impact the housings. Turbine didn't look bad (free high rpm clip job) but that compressor wheel is about to become a clock.
Didn't appear to hurt the engine but I'm going to pull the intercooler down to make sure there aren't any pieces inside it. The dead secondary turbo made no noise so I'm guessing it wasn't doing much. I'm thinking the debris from the compressor wheel came off as fine dust and hopefully blew out of the exhaust. I see no evidence of blow by, nothing in the oil (including fuel), and there was no damage to the turbine blades that would indicate a chunk of aluminum flying through. I'm going to check the IC just in case.
On the flip side, I'm fairly impressed that the primary turbo, running on slightly less than 1/2 the exhaust flow managed to put down those MPHs despite the terrible spool time. I converted over to speed density this weekend before I found the dead turbo and it was making 143kpa max (139-142 on average when it finally did spool) which would be somewhere around 6.25psi of boost. I could hear the wastegate open at ~4k and HPTuners shows the boost peaking near that range as well (~3800-3900). This down from 2400 when I first assembled the system.
With all the problems, 12.80s and 120+ trap speeds feel pretty good at around that boost level. I was making a tad more with the open cutout but my gauge is inaccurate (sits at 1psi with the car off).
I'm going to replace the gauge, install the new turbo, soften the front struts, and put some real tires on the back and see what it could do. I'm hoping for full boost of around 9psi below 2500 from a 4th gear roll on which should let me keep it under boost the whole way down the track.
#157
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
That would have taken a special place next to the driveshaft spear or perhaps the 3 piece bellhousing but I threw the shrine away when we moved! Hopefully we won't be starting a new one
Last edited by Speed; 05-21-2007 at 07:54 PM.
#158
TECH Fanatic
iTrader: (9)
Join Date: Apr 2005
Location: ATL/Savannah Georgia
Posts: 1,395
Likes: 0
Received 0 Likes
on
0 Posts
Sorry to see that.
creeping wheel, ect...scares me into thinkin "is my turbo really ok?" I have it off my car until next weekend. Anything you would recommend checking before I toss it back on? Wheel spins fine, no grinding, but ya never know it seems. Main thing im wondering is if everything is torqued down properly on the housings and wheel. Any tips? and Thanks for the updates
creeping wheel, ect...scares me into thinkin "is my turbo really ok?" I have it off my car until next weekend. Anything you would recommend checking before I toss it back on? Wheel spins fine, no grinding, but ya never know it seems. Main thing im wondering is if everything is torqued down properly on the housings and wheel. Any tips? and Thanks for the updates
#159
TECH Enthusiast
Thread Starter
iTrader: (33)
Join Date: Jul 2002
Location: Ok
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
I wouldn't worry about it if you have been using it for a while. Mine could have been something I screwed up on assembly or could have been a mis balanced shaft/wheels, etc.
As long as you have very little movement, either fore/aft or laterally, it's probably just fine.
As long as you have very little movement, either fore/aft or laterally, it's probably just fine.