SN95 5.3 TH400 3.27 build thread - 10.88/134.86 - NOW LQ9
07-12-2014, 12:07 PM
#101
LOL!
Hey, he's not MY guy, just a guy with a dyno lol.
Still lol'ing over here.
They are new ls9 springs (which are really ls6 springs but I feel a bit taken by Lingenfelter on that deal) and I think they should be swapped out. Also, its a th400 with a 10" Trans Specialties converter - nothing special but could be slipped like hell who knows.
07-12-2014, 02:52 PM
#103
TECH Enthusiast
Well it would have been 530rwhp on a Dj248 dyno so.... I wouldn't put too much stock in the numbers...T400 and a converter will eat up some power for sure.. I bet that car will trap in the mid to high 130s..
07-12-2014, 05:30 PM
#104
Crazy torque, good work Vince! The stock LQ4 cam/springs and that same turbo peaked about the same rpm on the original setup in that Sunbird I had, so I'd think an LS6 in a 5.3 would peak 6k or a higher. Might be the valve springs or converter, but like said it will probably fly at the track! Interesting findings with the water/methanol too, Ive always had the same weirdness with it if spraying a little too much.
07-15-2014, 04:47 AM
#106
Crazy torque, good work Vince! The stock LQ4 cam/springs and that same turbo peaked about the same rpm on the original setup in that Sunbird I had, so I'd think an LS6 in a 5.3 would peak 6k or a higher. Might be the valve springs or converter, but like said it will probably fly at the track! Interesting findings with the water/methanol too, Ive always had the same weirdness with it if spraying a little too much.
All the dyno tests I've found online show the LS6 cam peaking at 5300 n/a...but you've experienced different?
07-15-2014, 07:50 AM
#107
My setup was a stock LQ4 (stock springs/cam) so 196/204 cam, smaller than LS6, and same turbo, and it peaked at 5300 or 5400. So smaller cam on a bigger engine I'd think it would peak a little earlier than a smaller engine and bigger cam. Usually a decent sized turbo like you have will push peak power up a few 100 rpm over naturally aspirated too. My setup was carbed so maybe thats why my peak was pushed up a little? Either way great results Vince!
07-15-2014, 11:27 AM
#108
My setup was a stock LQ4 (stock springs/cam) so 196/204 cam, smaller than LS6, and same turbo, and it peaked at 5300 or 5400. So smaller cam on a bigger engine I'd think it would peak a little earlier than a smaller engine and bigger cam. Usually a decent sized turbo like you have will push peak power up a few 100 rpm over naturally aspirated too. My setup was carbed so maybe thats why my peak was pushed up a little? Either way great results Vince!
I wonder if my springs are just too weak, although my datatlogger was showing pretty smooth power (no erractic afr etc). 16psi is probably getting on the edge (or past the edge) of what they can control. That will be the next upgrade.
And I'm still baffled as to how an engine can pick-up 42hp but tq jumps +154lbs - can somebody explain that??
07-15-2014, 03:16 PM
#109
I thought your graphs looked weird. They were also hard to read. Fuzzy.
My guess is that you are much higher hp than that dyno session showed.
The track will tell all. Esp if you know what the car weighs.
All just my two cents.
Also why I won't go to a dyno unless I know the operator.
My guess is that you are much higher hp than that dyno session showed.
The track will tell all. Esp if you know what the car weighs.
All just my two cents.
Also why I won't go to a dyno unless I know the operator.
07-18-2014, 11:14 PM
#110
7 runs, 20 min cool downs, made it to there and back under its own power!
1.88-7.21/106 & 10.88/134.32 AT 16PSI. I did put 5 gals of 100 octane in there for some protection
Car is a slug off the line and I couldn't leave with any boost, just pushes through the brakes. And, I get an 1100 rpm drop from 1-2, but only 400 from 2-3. I gotta feeling the converter slipping up top cause I think the mph is a little light for 16 psi. My guess is that the car weighs about 3600 with me in there at 210lbs??
No meth injection and the highest IAT was 125* at the end of the runs.
Not epic times, but definitely a good time
1.88-7.21/106 & 10.88/134.32 AT 16PSI. I did put 5 gals of 100 octane in there for some protection
Car is a slug off the line and I couldn't leave with any boost, just pushes through the brakes. And, I get an 1100 rpm drop from 1-2, but only 400 from 2-3. I gotta feeling the converter slipping up top cause I think the mph is a little light for 16 psi. My guess is that the car weighs about 3600 with me in there at 210lbs??
No meth injection and the highest IAT was 125* at the end of the runs.
Not epic times, but definitely a good time
07-19-2014, 01:24 AM
#111
Good job. Got to be happy with the mph though.
FWIW, that's more than 497 RWHP.......
Your IC must be working well! I see 155 degrees and I'm at less boost. Either that or my Treadstone just isn't very effective.
I only made three runs tonight, and in the process I blew all of the coolant out. Oops. So much for LS1 MLS gaskets and China studs......
Another FWIW, adding timing on the foot brake, I tried 33, gave me no boost. I could hold 3200 rpm and that was 90kpa.
Glad you finally made it out!
Ron
FWIW, that's more than 497 RWHP.......
Your IC must be working well! I see 155 degrees and I'm at less boost. Either that or my Treadstone just isn't very effective.
I only made three runs tonight, and in the process I blew all of the coolant out. Oops. So much for LS1 MLS gaskets and China studs......
Another FWIW, adding timing on the foot brake, I tried 33, gave me no boost. I could hold 3200 rpm and that was 90kpa.
Glad you finally made it out!
Ron
07-19-2014, 07:29 AM
#113
Good job. Got to be happy with the mph though.
FWIW, that's more than 497 RWHP.......
Your IC must be working well! I see 155 degrees and I'm at less boost. Either that or my Treadstone just isn't very effective.
I only made three runs tonight, and in the process I blew all of the coolant out. Oops. So much for LS1 MLS gaskets and China studs......
Another FWIW, adding timing on the foot brake, I tried 33, gave me no boost. I could hold 3200 rpm and that was 90kpa.
Glad you finally made it out!
Ron
FWIW, that's more than 497 RWHP.......
Your IC must be working well! I see 155 degrees and I'm at less boost. Either that or my Treadstone just isn't very effective.
I only made three runs tonight, and in the process I blew all of the coolant out. Oops. So much for LS1 MLS gaskets and China studs......
Another FWIW, adding timing on the foot brake, I tried 33, gave me no boost. I could hold 3200 rpm and that was 90kpa.
Glad you finally made it out!
Ron
How do some folks get boost off the line...
07-19-2014, 09:26 AM
#115
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Hey Vince,
Glad you got it to the track. If it's 3600 lbs, I agree with Ron, it's making more than 500 RWHP. The fuel flow will tell the story. Sure don't need WM to cool things.
You can't really say you have "1100" and "400" drop as the shift RPM was quite a bit higher on the 1-2. If you shift higher RPM, the drops will be "more", but not at the RPM points you want possibly. It's all about getting the shift RPM and recovery RPM where you want it. On my car I shift at 7000-7200 and with my tighter converter, it drops to about 6000 RPM. If I shifted at 6k, I'd have no drop. So its about putting the RPM range where you want it as you go down the track (as you know).
So if you want to shift at 5800, the converter is probably too loose. If you up the shifts to say 6300-6400, might be better, assuming you make power there, which I think you make power down low.
Right converter and T brake and you have mid 9's.
Glad you got it to the track. If it's 3600 lbs, I agree with Ron, it's making more than 500 RWHP. The fuel flow will tell the story. Sure don't need WM to cool things.
You can't really say you have "1100" and "400" drop as the shift RPM was quite a bit higher on the 1-2. If you shift higher RPM, the drops will be "more", but not at the RPM points you want possibly. It's all about getting the shift RPM and recovery RPM where you want it. On my car I shift at 7000-7200 and with my tighter converter, it drops to about 6000 RPM. If I shifted at 6k, I'd have no drop. So its about putting the RPM range where you want it as you go down the track (as you know).
So if you want to shift at 5800, the converter is probably too loose. If you up the shifts to say 6300-6400, might be better, assuming you make power there, which I think you make power down low.
Right converter and T brake and you have mid 9's.
07-19-2014, 09:28 AM
#116
8 Second Club
7 runs, 20 min cool downs, made it to there and back under its own power!
1.88-7.21/106 & 10.88/134.32 AT 16PSI. I did put 5 gals of 100 octane in there for some protection
Car is a slug off the line and I couldn't leave with any boost, just pushes through the brakes. And, I get an 1100 rpm drop from 1-2, but only 400 from 2-3. I gotta feeling the converter slipping up top cause I think the mph is a little light for 16 psi. My guess is that the car weighs about 3600 with me in there at 210lbs??
No meth injection and the highest IAT was 125* at the end of the runs.
Not epic times, but definitely a good time
1.88-7.21/106 & 10.88/134.32 AT 16PSI. I did put 5 gals of 100 octane in there for some protection
Car is a slug off the line and I couldn't leave with any boost, just pushes through the brakes. And, I get an 1100 rpm drop from 1-2, but only 400 from 2-3. I gotta feeling the converter slipping up top cause I think the mph is a little light for 16 psi. My guess is that the car weighs about 3600 with me in there at 210lbs??
No meth injection and the highest IAT was 125* at the end of the runs.
Not epic times, but definitely a good time
07-19-2014, 09:28 AM
#117
Teching In
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Good job. Got to be happy with the mph though.
FWIW, that's more than 497 RWHP.......
Your IC must be working well! I see 155 degrees and I'm at less boost. Either that or my Treadstone just isn't very effective.
I only made three runs tonight, and in the process I blew all of the coolant out. Oops. So much for LS1 MLS gaskets and China studs......
Another FWIW, adding timing on the foot brake, I tried 33, gave me no boost. I could hold 3200 rpm and that was 90kpa.
Glad you finally made it out!
Ron
FWIW, that's more than 497 RWHP.......
Your IC must be working well! I see 155 degrees and I'm at less boost. Either that or my Treadstone just isn't very effective.
I only made three runs tonight, and in the process I blew all of the coolant out. Oops. So much for LS1 MLS gaskets and China studs......
Another FWIW, adding timing on the foot brake, I tried 33, gave me no boost. I could hold 3200 rpm and that was 90kpa.
Glad you finally made it out!
Ron
07-19-2014, 09:56 AM
#119
Hey Vince,
Glad you got it to the track. If it's 3600 lbs, I agree with Ron, it's making more than 500 RWHP. The fuel flow will tell the story. Sure don't need WM to cool things.
You can't really say you have "1100" and "400" drop as the shift RPM was quite a bit higher on the 1-2. If you shift higher RPM, the drops will be "more", but not at the RPM points you want possibly. It's all about getting the shift RPM and recovery RPM where you want it. On my car I shift at 7000-7200 and with my tighter converter, it drops to about 6000 RPM. If I shifted at 6k, I'd have no drop. So its about putting the RPM range where you want it as you go down the track (as you know).
So if you want to shift at 5800, the converter is probably too loose. If you up the shifts to say 6300-6400, might be better, assuming you make power there, which I think you make power down low.
Right converter and T brake and you have mid 9's.
Glad you got it to the track. If it's 3600 lbs, I agree with Ron, it's making more than 500 RWHP. The fuel flow will tell the story. Sure don't need WM to cool things.
You can't really say you have "1100" and "400" drop as the shift RPM was quite a bit higher on the 1-2. If you shift higher RPM, the drops will be "more", but not at the RPM points you want possibly. It's all about getting the shift RPM and recovery RPM where you want it. On my car I shift at 7000-7200 and with my tighter converter, it drops to about 6000 RPM. If I shifted at 6k, I'd have no drop. So its about putting the RPM range where you want it as you go down the track (as you know).
So if you want to shift at 5800, the converter is probably too loose. If you up the shifts to say 6300-6400, might be better, assuming you make power there, which I think you make power down low.
Right converter and T brake and you have mid 9's.
Fuel flow was around 422lbs. I disconnected the meth on some of the 1/8 mile runs and mph picked up by 1mph, but that within the margin of error AFAIC. Also, I started with the AFR at 11.6. Went to 11.3 and then to 12.0 - no change. I really wanted to make a run w/o the air filter but was running out of time and was worried the boost would shoot-up past 16psi and didn't want to risk a breakdown 40 miles from home.
Its definitely a riot though...couple times mid-track the car started to break loose and I had to get out of it.
07-19-2014, 09:59 AM
#120
Yeah I think I need to do something. 1st thing (just thought of this now) is I should of disconnected the vac mod to make sure boost wasn't f-ing with the trans. I think its OK but need to make sure. I have one of those trans-go valves which may or may not be venting enough.