TVS 300WHP Wall
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Joined: 07-16-08
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From: Boynton Beach, Fl
https://www.cobaltss.net/forums/advanced-performance-modifications-130/faq-tvs-harrop-lsj1320-you-143475/
read that.
Its the upgraded supercharger for our cars.
read that.
Its the upgraded supercharger for our cars.
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Joined: 08-11-08
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From: douglas AZ
http://www.gmperformancedivision.com...SJ_Chap5&6.pdf
go all the way to the bottom now it says straight from gm that the stock supercharger can support up to 300hp with just a pulley change and stuff now if the tvs cant go higher than that it has to be the tune. just thought i might add that i saw it in another thread trying to work on there clutches by the way it shows you how to do the airbox mod gm style lol
go all the way to the bottom now it says straight from gm that the stock supercharger can support up to 300hp with just a pulley change and stuff now if the tvs cant go higher than that it has to be the tune. just thought i might add that i saw it in another thread trying to work on there clutches by the way it shows you how to do the airbox mod gm style lol
Not a Sebring
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From: Northern VA
Rent me! per hour
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From: Still fixing others mistakes.
i am pretty much at the mercy of the head now on power. 414 crank hp.
a tune can net a lot of power difference between win and lose.
the right parts working together make a huge difference. no matter what someone says is the best this and that. they often are fan boy's on that brand. you never see me saying this and that is the best parts because every car is different. you have to find that key.
a tune can net a lot of power difference between win and lose.
the right parts working together make a huge difference. no matter what someone says is the best this and that. they often are fan boy's on that brand. you never see me saying this and that is the best parts because every car is different. you have to find that key.
i am pretty much at the mercy of the head now on power. 414 crank hp.
a tune can net a lot of power difference between win and lose.
the right parts working together make a huge difference. no matter what someone says is the best this and that. they often are fan boy's on that brand. you never see me saying this and that is the best parts because every car is different. you have to find that key.
a tune can net a lot of power difference between win and lose.
the right parts working together make a huge difference. no matter what someone says is the best this and that. they often are fan boy's on that brand. you never see me saying this and that is the best parts because every car is different. you have to find that key.
thats about 370 whp
Of course 500 is a higher number than 350 but your question is showing that you guys are misunderstanding the meaning of CFM and blower size and how they are related to PSI.
CFM is airflow so saying "more CFM = more airflow at 12 PSI" is the same as saying "more airflow = more airflow at the same boost" which obviously isn't true. For the sake of this discussion, more CFM will always = more PSI, if you leave other variables the same. The TVS shines because it can produce more PSI than the M62 and it's more efficient in those higher boost numbers doing so. The degree of this remains to be determined.
A larger blower doesn't mean it will put out more CFM at the same PSI. In fact, it could put out less CFM. The CFM something related to a given PSI is based on the air temperature which has to do with the adiabatic efficiency of the compressor.
You have to be a level 4 cleric to use the magic halfling tune of many horses. Most of us haven't finished enough levels to unlock it
I think it's funny that I was mocked, ridiculed endlessly and told I didn't know anything and had no experience when less than a month ago I used 300WHP as an average # for people bolting on the TVS. This in response to a customer asking if 350WHP was realistic....
and 370WHP is about 425 crank HP, which is pretty close to 400WHP....
Unless this was measured on an engine dyno, why are we discussing crank HP and then having people convert it with math to engine HP? Why not just post the dyno'd power to avoid confusion?
CFM is airflow so saying "more CFM = more airflow at 12 PSI" is the same as saying "more airflow = more airflow at the same boost" which obviously isn't true. For the sake of this discussion, more CFM will always = more PSI, if you leave other variables the same. The TVS shines because it can produce more PSI than the M62 and it's more efficient in those higher boost numbers doing so. The degree of this remains to be determined.
A larger blower doesn't mean it will put out more CFM at the same PSI. In fact, it could put out less CFM. The CFM something related to a given PSI is based on the air temperature which has to do with the adiabatic efficiency of the compressor.
I think it's funny that I was mocked, ridiculed endlessly and told I didn't know anything and had no experience when less than a month ago I used 300WHP as an average # for people bolting on the TVS. This in response to a customer asking if 350WHP was realistic....
and 370WHP is about 425 crank HP, which is pretty close to 400WHP....
Unless this was measured on an engine dyno, why are we discussing crank HP and then having people convert it with math to engine HP? Why not just post the dyno'd power to avoid confusion?
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Joined: 04-08-06
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From: Charlotte, NC
300 is deff. not the wall.....I was right at 300 whp w/ the TVS w/ the 2.9" pulley. That was also with a 2.25" exhaust, and no cooling mods, and just an AEM CAI. After the dyno, I added a Vibrant 3" cat-back, in-line heat exchanger.....I never did get back to the dyno after that, but there was a huge improvment.
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Joined: 07-16-08
Posts: 5,610
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From: Boynton Beach, Fl
Of course 500 is a higher number than 350 but your question is showing that you guys are misunderstanding the meaning of CFM and blower size and how they are related to PSI.
CFM is airflow so saying "more CFM = more airflow at 12 PSI" is the same as saying "more airflow = more airflow at the same boost" which obviously isn't true. For the sake of this discussion, more CFM will always = more PSI, if you leave other variables the same. The TVS shines because it can produce more PSI than the M62 and it's more efficient in those higher boost numbers doing so. The degree of this remains to be determined.
A larger blower doesn't mean it will put out more CFM at the same PSI. In fact, it could put out less CFM. The CFM something related to a given PSI is based on the air temperature which has to do with the adiabatic efficiency of the compressor.
CFM is airflow so saying "more CFM = more airflow at 12 PSI" is the same as saying "more airflow = more airflow at the same boost" which obviously isn't true. For the sake of this discussion, more CFM will always = more PSI, if you leave other variables the same. The TVS shines because it can produce more PSI than the M62 and it's more efficient in those higher boost numbers doing so. The degree of this remains to be determined.
A larger blower doesn't mean it will put out more CFM at the same PSI. In fact, it could put out less CFM. The CFM something related to a given PSI is based on the air temperature which has to do with the adiabatic efficiency of the compressor.
If you are asking what I think you are asking then I was saying this:
CFM is airflow. That's what the definition of airflow is. Just as you can't say higher temperature = warmer air at the same degrees Farenheight; you cannot say that the same CFM of air is = to more air. If it was more air, then it would be more CFM. If you were trying to move more CFM into an engine then the boost would be higher.
Blowers do not have a fixed CFM short stack. The CFM varies based on how fast ou spin it. If you have a 1 liter blower and compare it to a 1.3 liter blower, both will put out the same PSI, you just have to spin the 1 liter blower 30% faster. They will then be creating the same PSI unless one has hotter air in which case boost would be high because temperature = pressure.
Look at this graph:
What you are looking at is a blower being spun with and without an intercooler.
The top line is the CFM, that goes the highest. In that chart to around 550CFM.
Now if we had a blower twice as large and spun it 1/2 the speed, the chart would be the same (save for RPM).
Notice the bottom two lines that are close but then separate at the end? That's because one is intercooled. Same CFM but different PSI because of the temperature difference.
This also touches on people talking about the limits of the stock head. There is no limit guys. If you want more power, you just need more boost. It will never end. The stock head will support 2000 WHP if you boost it enough. The limitation is the power adder's ability to create boost and create it effiently though. This is where the ported head helps out a lot. It will flow more CFM with less PSI.
Last edited by Zooomer; Mar 26, 2009 at 01:54 PM.
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Joined: 07-16-08
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From: Boynton Beach, Fl
Your question isn't making sense to me because I'm not sure what you mean.
If you are asking what I think you are asking then I was saying this:
CFM is airflow. That's what the definition of airflow is. Just as you can't say higher temperature = warmer air at the same degrees Farenheight; you cannot say that the same CFM of air is = to more air. If it was more air, then it would be more CFM. If you were trying to move more CFM into an engine then the boost would be higher.
If you are asking what I think you are asking then I was saying this:
CFM is airflow. That's what the definition of airflow is. Just as you can't say higher temperature = warmer air at the same degrees Farenheight; you cannot say that the same CFM of air is = to more air. If it was more air, then it would be more CFM. If you were trying to move more CFM into an engine then the boost would be higher.
.Does this make sense? Since the tvs is .32L larger than the m62, it will be pushing out more air at a given rotational speed.. or what? The lobes are different, so maybe you cant compare the two? I dont know?
You know whats funny, i typed that before you edited it, and i pretty much read you mind..
I think i gets it.. thank you.
Last edited by ShortStack; Mar 26, 2009 at 01:44 PM. Reason: Automerged Doublepost
That kinda helps me get what your trying to say... Seriously.. .
Does this make sense? Since the tvs is .32L larger than the m62, it will be pushing out more air at a given rotational speed.. or what? The lobes are different, so maybe you cant compare the two? I dont know?
You know whats funny, i typed that before you edited it, and i pretty much read you mind..
I think i gets it.. thank you.
.Does this make sense? Since the tvs is .32L larger than the m62, it will be pushing out more air at a given rotational speed.. or what? The lobes are different, so maybe you cant compare the two? I dont know?
You know whats funny, i typed that before you edited it, and i pretty much read you mind..
I think i gets it.. thank you.
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From: pa/jersey