370, Garrett GT55-94, truck manifolds build thread. ***UPDATE 12-10***
09-27-2011, 10:43 AM
#384
I don't even want to know all the hassle I'd have to go through just to log that one parameter. Calculator in my case is much easier, and I also think that black ws6 having a powerglide, I don't think he can log slip either so a calculator is the only thing we can use.
09-27-2011, 12:47 PM
#385
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The best way to find slippage is by logging driveshaft speed and comparing it to RPM.
Logging slippage with the factory stuff only works with computer controlled transmissions, not sure how accurate it really is, never really messed with it. I would imagine there is a way to setup a calc PID for DS speed using EFIlive/HPT and logging it. It you can get it mounted etc..
The calculator works pretty well for looking at what your slippage is at the end of a pass, using DS speed works great because you can compare DS speed and RPM throughout an entire run.. DS speed is also VERY helpful in setting up power management/boost control.
This is a really cool build, I would be interested in seeing what your IAT numbers are at the topend of a pass, as well as what your plugs look like. I'm kicking around the idea of building a setup with no intercooler myself.
Logging slippage with the factory stuff only works with computer controlled transmissions, not sure how accurate it really is, never really messed with it. I would imagine there is a way to setup a calc PID for DS speed using EFIlive/HPT and logging it. It you can get it mounted etc..
The calculator works pretty well for looking at what your slippage is at the end of a pass, using DS speed works great because you can compare DS speed and RPM throughout an entire run.. DS speed is also VERY helpful in setting up power management/boost control.
This is a really cool build, I would be interested in seeing what your IAT numbers are at the topend of a pass, as well as what your plugs look like. I'm kicking around the idea of building a setup with no intercooler myself.
09-27-2011, 05:54 PM
#386
The best way to find slippage is by logging driveshaft speed and comparing it to RPM.
Logging slippage with the factory stuff only works with computer controlled transmissions, not sure how accurate it really is, never really messed with it. I would imagine there is a way to setup a calc PID for DS speed using EFIlive/HPT and logging it. It you can get it mounted etc..
The calculator works pretty well for looking at what your slippage is at the end of a pass, using DS speed works great because you can compare DS speed and RPM throughout an entire run.. DS speed is also VERY helpful in setting up power management/boost control.
This is a really cool build, I would be interested in seeing what your IAT numbers are at the topend of a pass, as well as what your plugs look like. I'm kicking around the idea of building a setup with no intercooler myself.
Logging slippage with the factory stuff only works with computer controlled transmissions, not sure how accurate it really is, never really messed with it. I would imagine there is a way to setup a calc PID for DS speed using EFIlive/HPT and logging it. It you can get it mounted etc..
The calculator works pretty well for looking at what your slippage is at the end of a pass, using DS speed works great because you can compare DS speed and RPM throughout an entire run.. DS speed is also VERY helpful in setting up power management/boost control.
This is a really cool build, I would be interested in seeing what your IAT numbers are at the topend of a pass, as well as what your plugs look like. I'm kicking around the idea of building a setup with no intercooler myself.
Thats right. I had fuel pressure drop at 5700 @14psi so we are playing it safe. Next year i have a whole new fuel system in mind and will be turning aronud 72-7300, but for this season im not taking it past 6K.
09-29-2011, 11:40 PM
#389
Im FINALLY going to get a chance to run 1/4 mile this sunday so i will take some good videos with the go pro, and camera to see if you can hear anything to give me better feedback. Will most likely try to keep the boost as low as possible and make it to the end of the 1/4 without bouncing off my ***** 6K limiter.
09-29-2011, 11:48 PM
#390
TECH Regular
How do u know it's the converter instead of the clutches? I thought I was slipping my 3-4 pack at 800 ft/lbs because it would shudder 3-4 times. Turned out to be ballooning the converter. I figured that out when it exploded inside
09-30-2011, 12:08 AM
#392
TECH Regular
Yep, clogged the cooler and that took out the rear planet. Metal in the pump....$800 converter with a week lockup that slips at the slightest load. $200 planet, pump? Labor?
Here it is. http://www.ls1gto.com/forums/showpos...postcount=1707
Here it is. http://www.ls1gto.com/forums/showpos...postcount=1707
09-30-2011, 06:56 AM
#394
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why are you shifting at 6K? glides can be funny...especially with the drastic 1-2 ratio difference. For example, if I short shift I might see only a few hundred drop. If I shift at where I'm supposed to I see 1000 rpm drop.
09-30-2011, 11:37 AM
#395
never heard of them. converters for turbo cars can be weird. 500rpm drop on the shift is WAY too loose. I'd seriously think about looking at well known turbo converter manufacturers.
why are you shifting at 6K? glides can be funny...especially with the drastic 1-2 ratio difference. For example, if I short shift I might see only a few hundred drop. If I shift at where I'm supposed to I see 1000 rpm drop.
why are you shifting at 6K? glides can be funny...especially with the drastic 1-2 ratio difference. For example, if I short shift I might see only a few hundred drop. If I shift at where I'm supposed to I see 1000 rpm drop.
10-05-2011, 11:03 PM
#398
http://www.youtube.com/watch?v=rAYpcBDcgyk
Car did good at the track. Went a best of 9.81 @ 138.8 with a 1.50 60ft. 1/8th mile was 6.30 @ 115
Car was bouncing off the limiter at about the 1000ft mark, and then i pedaled it to the end. Raced it at 12 psi all night. I NEED MORE RPM, FUEL AND BOOST!!!!!!
I did 4 passes and dead hooked everytime. first was 3000 RPM with 2 psi, then did a 3500 with 4 psi, then 4000 with 5psi, and lastly a 4500 at 7psi. The 4500 was the 1.50 60ft. Should i keep uping the RPM and boost at launch and see what happens, or more boost for the RPM?
Also i switched out my BOV spring to the tightest for the JGS 60mm, know i cant boost any lower than 12 psi even with a 7psi wastegate spring. Someone please explain this to me!
Car did good at the track. Went a best of 9.81 @ 138.8 with a 1.50 60ft. 1/8th mile was 6.30 @ 115
Car was bouncing off the limiter at about the 1000ft mark, and then i pedaled it to the end. Raced it at 12 psi all night. I NEED MORE RPM, FUEL AND BOOST!!!!!!
I did 4 passes and dead hooked everytime. first was 3000 RPM with 2 psi, then did a 3500 with 4 psi, then 4000 with 5psi, and lastly a 4500 at 7psi. The 4500 was the 1.50 60ft. Should i keep uping the RPM and boost at launch and see what happens, or more boost for the RPM?
Also i switched out my BOV spring to the tightest for the JGS 60mm, know i cant boost any lower than 12 psi even with a 7psi wastegate spring. Someone please explain this to me!
10-05-2011, 11:25 PM
#399
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i dont know why they even bother listing psi with the wastegate springs. they need to list them as this spring is harder than this spring and so on and so forth.
however, if you are trying to drop the boost, and put in the weakest spring, and thats the lowest boost you can make.. well then your wastegate location needs work.
however, if you are trying to drop the boost, and put in the weakest spring, and thats the lowest boost you can make.. well then your wastegate location needs work.
10-05-2011, 11:25 PM
#400
http://www.youtube.com/watch?v=rAYpcBDcgyk
Car did good at the track. Went a best of 9.81 @ 138.8 with a 1.50 60ft. 1/8th mile was 6.30 @ 115
Car was bouncing off the limiter at about the 1000ft mark, and then i pedaled it to the end. Raced it at 12 psi all night. I NEED MORE RPM, FUEL AND BOOST!!!!!!
I did 4 passes and dead hooked everytime. first was 3000 RPM with 2 psi, then did a 3500 with 4 psi, then 4000 with 5psi, and lastly a 4500 at 7psi. The 4500 was the 1.50 60ft. Should i keep uping the RPM and boost at launch and see what happens, or more boost for the RPM?
Also i switched out my BOV spring to the tightest for the JGS 60mm, know i cant boost any lower than 12 psi even with a 7psi wastegate spring. Someone please explain this to me!
Car did good at the track. Went a best of 9.81 @ 138.8 with a 1.50 60ft. 1/8th mile was 6.30 @ 115
Car was bouncing off the limiter at about the 1000ft mark, and then i pedaled it to the end. Raced it at 12 psi all night. I NEED MORE RPM, FUEL AND BOOST!!!!!!
I did 4 passes and dead hooked everytime. first was 3000 RPM with 2 psi, then did a 3500 with 4 psi, then 4000 with 5psi, and lastly a 4500 at 7psi. The 4500 was the 1.50 60ft. Should i keep uping the RPM and boost at launch and see what happens, or more boost for the RPM?
Also i switched out my BOV spring to the tightest for the JGS 60mm, know i cant boost any lower than 12 psi even with a 7psi wastegate spring. Someone please explain this to me!
The bov spring only affects how the bov opens and closes. You should have the bov referenced at the intake and it should stay closed under boost.
As far as the waste gate goes you should try and put regulated pressure to it and see what kind of pressure it takes to move the valve. If it operates at 10-14 psi (reference + backpressure) then the only reason it would make more boost then that at the intake is it is too small to dump enough exhaust gasses and/or it is poorly placed.