turbo 5.3 ws6 vs 07 gt500 580whp
10-25-2015, 06:58 AM
#1
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turbo 5.3 ws6 vs 07 gt500 580whp Had an interesting run tonight.
full stock 5.3 with ls1 accessory. 19psi
76mm turbo w/ meth. conservative tune.
ws6
VS
07 gt500 580whp(dyno) mods unknown.
I was most definitely impressed by the amount of top end the gt5 had. off a launch i would lead about 1-2 car length and then on the top end it would reel me in and end up about 3-4 car length ahead of me.
off a roll were about dead even until higher up and again it would leave about 3-4. I didnt think it was that much power difference between the two. i was thinking 30-40whp difference but that may not be the case.
sorry no vid. just wanted to share.
i am considering upping the boost by 6 psi to about 25psi and do a rematch but not sure if its worth the risk on 91 octain.
that or upgrade the cams and intake and maybe only up by 3 or so psi.
what do you guys think? i guess im a lot farther from my goal of 600 than i thought
full stock 5.3 with ls1 accessory. 19psi
76mm turbo w/ meth. conservative tune.
ws6
VS
07 gt500 580whp(dyno) mods unknown.
I was most definitely impressed by the amount of top end the gt5 had. off a launch i would lead about 1-2 car length and then on the top end it would reel me in and end up about 3-4 car length ahead of me.
off a roll were about dead even until higher up and again it would leave about 3-4. I didnt think it was that much power difference between the two. i was thinking 30-40whp difference but that may not be the case.
sorry no vid. just wanted to share.
i am considering upping the boost by 6 psi to about 25psi and do a rematch but not sure if its worth the risk on 91 octain.
that or upgrade the cams and intake and maybe only up by 3 or so psi.
what do you guys think? i guess im a lot farther from my goal of 600 than i thought
10-25-2015, 07:34 AM
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Something isn't right with your setup or he's lying about his power. Even if your only 530-550 with the weight advantage you should pull a few lengths at a minimum.
10-25-2015, 08:20 AM
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How "conservative" is your tune? You maby running at 19psi max but how long does it take to see that? What rpm does it start to build pressure? And timing ? Do you have e85 where you are to tune more aggressive? Did you brake boost? All things to consider, and anything can happen on the street.
10-25-2015, 08:24 AM
#4
Good death.
Since you said "full stock 5.3" I'm guessing your camshaft is choking you back. What size is the exhaust side of your turbo? And no reason to be afraid of 91 when you have a meth kit on your car. Just dial in your fuel and approach with timing gently.
Since you said "full stock 5.3" I'm guessing your camshaft is choking you back. What size is the exhaust side of your turbo? And no reason to be afraid of 91 when you have a meth kit on your car. Just dial in your fuel and approach with timing gently.
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10-25-2015, 03:17 PM
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10-25-2015, 03:49 PM
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How "conservative" is your tune? You maby running at 19psi max but how long does it take to see that? What rpm does it start to build pressure? And timing ? Do you have e85 where you are to tune more aggressive? Did you brake boost? All things to consider, and anything can happen on the street.
really conservative were talking 12*timing and 10.1-10.5 a/f
i basically raised the boost and took everything down to "safety". then slowly tuning it. but got to busy and havent got around to finishing it.
and i rather ot run e85. not good IMO for daily driver.
10-25-2015, 03:55 PM
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I dont see a reason why he would be lying about power. we raced before when he was stock and i left it behind at lower boost.
i know for sure he doesnt drive very well since i left him behind off a dig but once were moving his car just pulls.
no track just a daily
yea i can feel it, it doesnt pull as hard up top.
interesting how high have you gone with meth and 91 boost wise? i can it the ait going down to 70*-75* during WOT so i think i can go more but not sure. Im also considering adding another jets if needed. currently 14lbs post intercooler 6# pre compressor.
stock compression. 100% stock long block.
and methanol kit is your friend. zero knock on mine. but i did see a knock before when i was running smaller jets. that or your tune is off. on another car i was up 34psi on e85 no knock and 21 psi on 91 no meth no knock(low comp though).
i know for sure he doesnt drive very well since i left him behind off a dig but once were moving his car just pulls.
no track just a daily
interesting how high have you gone with meth and 91 boost wise? i can it the ait going down to 70*-75* during WOT so i think i can go more but not sure. Im also considering adding another jets if needed. currently 14lbs post intercooler 6# pre compressor.
and methanol kit is your friend. zero knock on mine. but i did see a knock before when i was running smaller jets. that or your tune is off. on another car i was up 34psi on e85 no knock and 21 psi on 91 no meth no knock(low comp though).
10-25-2015, 04:02 PM
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im pretty sure my car weight pretty close to his after the iron block swap and turbo/intercooler/piping/added weight.
it has a pretty good power range id say 2000-2.5 is full boost. brake boosting would be sooner.
really conservative were talking 12*timing and 10.1-10.5 a/f
i basically raised the boost and took everything down to "safety". then slowly tuning it. but got to busy and havent got around to finishing it.
and i rather ot run e85. not good IMO for daily driver.
it has a pretty good power range id say 2000-2.5 is full boost. brake boosting would be sooner.
really conservative were talking 12*timing and 10.1-10.5 a/f
i basically raised the boost and took everything down to "safety". then slowly tuning it. but got to busy and havent got around to finishing it.
and i rather ot run e85. not good IMO for daily driver.
Last edited by automach1; 10-25-2015 at 04:07 PM.
10-25-2015, 04:17 PM
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i know i loose a lot but i dont know how to get it dialed in from the start.
it was actualy at 11 but when i up the methanol it jump .5 richer.
my preferred afr is 11.5-11.7 that way should my meth fail i wont be too lean.
are you saying 10.5 is equivalent to lean? or am i misunderstanding?
10-25-2015, 08:06 PM
#15
can you explain? i usually dial everything to rich when i up the boost then lean out.
i know i loose a lot but i dont know how to get it dialed in from the start.
it was actualy at 11 but when i up the methanol it jump .5 richer.
my preferred afr is 11.5-11.7 that way should my meth fail i wont be too lean.
are you saying 10.5 is equivalent to lean? or am i misunderstanding?
i know i loose a lot but i dont know how to get it dialed in from the start.
it was actualy at 11 but when i up the methanol it jump .5 richer.
my preferred afr is 11.5-11.7 that way should my meth fail i wont be too lean.
are you saying 10.5 is equivalent to lean? or am i misunderstanding?
10-25-2015, 11:23 PM
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dont get me wrong it will still get fine tune. it will get done and aiming 11:5 under meth as i stated before. all i would really need is some time but since i do street tune that means staying up till 2-3am(so no cars to worry about). if this is however truly the case where im risking it i may just go do a quick pull and drop the boost enrichment for now and fine tune later.
10-26-2015, 06:54 AM
#18
id read some "ring washout" possibility before but what exactly do you guys consider too rich? i was under the impression its bellow 10.0 where that becomes a high risk.
dont get me wrong it will still get fine tune. it will get done and aiming 11:5 under meth as i stated before. all i would really need is some time but since i do street tune that means staying up till 2-3am(so no cars to worry about). if this is however truly the case where im risking it i may just go do a quick pull and drop the boost enrichment for now and fine tune later.
dont get me wrong it will still get fine tune. it will get done and aiming 11:5 under meth as i stated before. all i would really need is some time but since i do street tune that means staying up till 2-3am(so no cars to worry about). if this is however truly the case where im risking it i may just go do a quick pull and drop the boost enrichment for now and fine tune later.
10-26-2015, 08:10 AM
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11.5 under meth is too lean. You'll blow it up at that much boost if youre that lean with meth. That being said. 10.X:1 without meth is too rich. A 76mm turbo on that 5.3 at 19psi should make all of 700rwhp easy. Either the tune is way off or you have something else going on. When you say a 76mm turbo, can you give details like your turbine A/R etc.? Most people make between 20-25rwhp or more per PSI assuming some level of efficiency. If you made 250whp on that 5.3 and made 25whp/psi, thats 725whp so either you have a major issue choking your power, or he's full of it on that 580whp number.
and its about 11:1 without meth and 10:1-10:5 with meth.
that hp seems a bit high. maybe crank.
seeng that this person dyno shows much lower with a cam. and i found a few others before about the same power.
https://ls1tech.com/forums/forced-in...sults-vid.html
on3 76mm turbo
Cold Side:
Compressor Wheel 76mm
.80 a/r
4” Inlet and 2.5” Compressor Outlet
Inducer- 76.71mm
Exducer- 102.36mm
Exhaust Side:
Exhaust Housing T-4 Flange
.96 ar Exhaust Housing
3.0" Vband outlet
Inducer- 74.5mm
Exducer- 65mm
10-26-2015, 08:46 AM
#20
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11.5 under meth is too lean. You'll blow it up at that much boost if youre that lean with meth. That being said. 10.X:1 without meth is too rich. A 76mm turbo on that 5.3 at 19psi should make all of 700rwhp easy. Either the tune is way off or you have something else going on. When you say a 76mm turbo, can you give details like your turbine A/R etc.? Most people make between 20-25rwhp or more per PSI assuming some level of efficiency. If you made 250whp on that 5.3 and made 25whp/psi, thats 725whp so either you have a major issue choking your power, or he's full of it on that 580whp number.