85mm tb and ls6 install.... not what i was expecting...
08-28-2009, 01:31 PM
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85mm tb and ls6 install.... not what i was expecting... Ok so I'm kind of in a dilemma here... I installed a Professional Products 85mm TB the other day along with the ls6 intake. I feel as if up top from 4500-6000 my car is not running as strong as the stock TB and LS1 intake. I know the ls6 intake wouldn't make me lose power... So im leaning towards the TB... It came with all sensors so I just plugged it up and drove it around. Now can i just plug it up like that and drive it? or do I need to adjust the TPS and what not?
maybe the TB is overkill???
or maybe is it just my butt dyno? i feel like i lost a little tq as well....
What are you guy's thoughts?
Thanks,
Lee
edit: the car was tuned before the intake manifold and TB install. perhaps it just needs a tune now?
maybe the TB is overkill???
or maybe is it just my butt dyno? i feel like i lost a little tq as well....
What are you guy's thoughts?
Thanks,
Lee
edit: the car was tuned before the intake manifold and TB install. perhaps it just needs a tune now?
Last edited by bongva; 08-28-2009 at 03:25 PM.
08-28-2009, 01:38 PM
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what kind of supporting mods do you have done to the car. if you don't have anything else you'll lose a little on the low end with the bigger TB. but if you're losing up top you might need a tune.
08-29-2009, 04:32 PM
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08-30-2009, 02:54 PM
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I dyno tested this, same time right on the dyno.....
https://ls1tech.com/forums/generatio...vs-fast92.html
https://ls1tech.com/forums/generatio...vs-fast92.html
excellent information!!!!
but now the problem is, i think that my car with the ls6 intake and 85mm tb actually runs worse than the ls1 intake and stock tb.
so i thought that it was the 85mm tb, i took it off last night and put the stock one back on. (left the ls6 intake on the car). ran a buddy of mine that i always run, with the stock ls1 intake/tb i would get him pretty hard, but with the ls6 intake and stock tb, he was at my door!!! not sure wants going on anymore. might just do a full maintence on the car then throw it on the dyno and go from there.
any input u guys have is greatly appreciated!
08-30-2009, 08:58 PM
#15
OK, then you need a new SD tune. Swapping an intake & TB while on a SD tune with no re-tune is dangerous. I'd bet she's running lean & pulling timing due to knock. There's the power loss. With no fuel trims to correct the increased airflow into the heads, she's running lean. At the very least, modify the OL fuel table & the PE table to increase fueling.
08-30-2009, 09:21 PM
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not to take over ur thread bongva but just curious im still new to the entire LS1 motors but would the 85mm tb and ls6 intake be one of thoughs mods u would want to do after u put in a decent size cam? in my opinion u are better off running stock intake and TB until u do a cam. is there some truth to that?
08-31-2009, 04:19 AM
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not to take over ur thread bongva but just curious im still new to the entire LS1 motors but would the 85mm tb and ls6 intake be one of thoughs mods u would want to do after u put in a decent size cam? in my opinion u are better off running stock intake and TB until u do a cam. is there some truth to that?
08-31-2009, 09:24 AM
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OK, then you need a new SD tune. Swapping an intake & TB while on a SD tune with no re-tune is dangerous. I'd bet she's running lean & pulling timing due to knock. There's the power loss. With no fuel trims to correct the increased airflow into the heads, she's running lean. At the very least, modify the OL fuel table & the PE table to increase fueling.
also another question, when we did my log, my buddy said that i was at 100% duty cycle.... is that correct? i mean on just bolt-ons can i really max out my stock injectors?
Last edited by bongva; 08-31-2009 at 09:35 AM.
08-31-2009, 09:51 AM
#20
OK, then you need a new SD tune. Swapping an intake & TB while on a SD tune with no re-tune is dangerous. I'd bet she's running lean & pulling timing due to knock. There's the power loss. With no fuel trims to correct the increased airflow into the heads, she's running lean. At the very least, modify the OL fuel table & the PE table to increase fueling.