Harrop TVS - Coming Soon!!

[Witt]

You silly plastic people.

On a stock LSJ pulley and a stock 6500rpm redline, that blower will be providing you with 350hp+ worth of air.

This isn't exactly a bolt on modification. Thats beyond the limit of the stock fuel pump and 60lb/hr injectors.

.net has a good discussion on it. In the thread over there I posted some airflow numbers with different pulleys and engine speeds according to the compressor map Eaton has provided.

To run this thing with 42lb(lol) or 60 lb injectors or the stock fuel system is like putting a stage 3 neon turbo on a skittle without anything else the kit comes with.

[rice eater]

I have a hard time understanding how you come up with that. I have only ran 42.5lb and have seen well over 350 hp. With the 60lb injectors we should be just fine.

[Witt]

Originally Posted by rice eater

I have a hard time understanding how you come up with that. I have only ran 42.5lb and have seen well over 350 hp. With the 60lb injectors we should be just fine.

At 21 psi boost 6500 rpm stock top end you need ~16ms pulse width out of a 60lb/hr injector to maintain a high 11 air fuel. At that pulse width and rpm you are just short of 90%. This is on a 305hp (480cfm) car by the way.

To achieve 350hp (550cfm) of airflow you'll have a pressure of about ~24 psi of boost with the stock top end with the same car. With that difference in manifold pressure compared to fuel pressure in addition to an increase to 550cfm of airflow you would be past a static rate for 60lb injectors.

Heres a run on a stock top end turbo swapped car to show my numbers:


Edit: to achieve the same airflow as seen in that table above (40.66lb/min) you would have to spin the TVS at a speed of 11,000 rpm by using a 3.69" pulley at 6500rpm. At 11.8 afr you would see the 87% duty cycle as shown.

[Witt]

I looked over all the data that I have once again, both for M62 equipped cars and also higher horsepower cars local to me. Theres a difference between what Eaton claims their M62 will output and what it really seems to output on an LSJ. Its more than likely a thermal efficiency issue so I redid the math on projected TVS data assuming the same errors occur in the TVS map they published.

With that being said, with the absolute worst conditions (temperature and altitude) and efficiencies possible out of the TVS and also taking into account the error percentage between real world and published M62 capacity and I'm also not including the increase in manifold pressure that the fueling system has to work against. My educated guess, which won't be confirmed until we get some real world results, is the stock fuel system and 60lb/hr injectors running out of capacity with a 3.125" pulley on a 7000rpm car or a 2.900" pulley on a 6500rpm car.

Obviously this is nothing but theorycrafting, but nobody has any other data to work on.

[Area47]

sooooooooooooo. 42.5 lbers are fine to 350 crank hp or whp? id reeeaaalllyyyy like to know what type of fuel system you think the lsj runs. because frankly. i wouldn't run them to over 270 whp. im trying not to rofl off the roflcopter into the lawlercano.


if you want a shitty comparison. take a m62. double the airflow. this will get your close to the 1320 tvs. im not trying to start a war, but a 42lb car will not support the air flow for this blower. 60's will be pushing it.

yes i know you have been around a while and have done a lot of work to yours, but logic and simple math are playing a big role in this right now

[boosthard05]

Originally Posted by Witt

You silly plastic people.

On a stock LSJ pulley and a stock 6500rpm redline, that blower will be providing you with 350hp+ worth of air.

This isn't exactly a bolt on modification. Thats beyond the limit of the stock fuel pump and 60lb/hr injectors.

.net has a good discussion on it. In the thread over there I posted some airflow numbers with different pulleys and engine speeds according to the compressor map Eaton has provided.

To run this thing with 42lb(lol) or 60 lb injectors or the stock fuel system is like putting a stage 3 neon turbo on a skittle without anything else the kit comes with.

Originally Posted by Area47

sooooooooooooo. 42.5 lbers are fine to 350 crank hp or whp? id reeeaaalllyyyy like to know what type of fuel system you think the lsj runs. because frankly. i wouldn't run them to over 270 whp. im trying not to rofl off the roflcopter into the lawlercano.


if you want a shitty comparison. take a m62. double the airflow. this will get your close to the 1320 tvs. im not trying to start a war, but a 42lb car will not support the air flow for this blower. 60's will be pushing it.

yes i know you have been around a while and have done a lot of work to yours, but logic and simple math are playing a big role in this right now

You may be over analizing things...

perfect example of people who know too much is my fathers experience... he has no major math or physics education at all, as a matter of fact he is a high school drop out, but managed to invent an instrument that finds gold, silver, gems, hair, bones, ect... pretty much anything by resonating its melecular frequency and using another device he created to pinpoint that molecular frequency.

Physics majors and engineers told him that it couldn't be done and the very concept was stupid because it was impossible to do...

moral of the story...

yes you can be too smart and over analize things... there are plenty of 350+whp LSJ's running around with 42lb and 60lb injectors, weather its through nitrous, turbo or otherwise... people are doing it so your logic is flawed.

[AlphaJaguar5]

Originally Posted by boosthard05

You may be over analizing things...

perfect example of people who know too much is my fathers experience... he has no major math or physics education at all, as a matter of fact he is a high school drop out, but managed to invent an instrument that finds gold, silver, gems, hair, bones, ect... pretty much anything by resonating its melecular frequency and using another device he created to pinpoint that molecular frequency.

Physics majors and engineers told him that it couldn't be done and the very concept was stupid because it was impossible to do...

moral of the story...

yes you can be too smart and over analize things... there are plenty of 350+whp LSJ's running around with 42lb and 60lb injectors, weather its through nitrous, turbo or otherwise... people are doing it so your logic is flawed.

Dude, you need x amount of fuel for x amount of power. Internal combustion engine's are not something new they are something that has been done for a long time and physics are physics when it comes down to it. You cannot make 350whp on 42lb/hr injectors at 58psi. The fuel just isn't there. We're not talking about molecular frequencies here, we're talking about unleaded petroleum fuel and air. No one is breaking boundaries here and developing new products, we're using a fuel pump to pump gasoline into a combustion engine to to blow it up, controllably, and push a piece of metal down to turn a shaft of metal to make power via that process. Not brain science nor rocket surgery.

btw You need to update us on your record stuff

[2005 silverRL]

Turbo>Supercharger

[Area47]

Originally Posted by AlphaJaguar5

Dude, you need x amount of fuel for x amount of power. Internal combustion engine's are not something new they are something that has been done for a long time and physics are physics when it comes down to it. You cannot make 350whp on 42lb/hr injectors at 58psi. The fuel just isn't there. We're not talking about molecular frequencies here, we're talking about unleaded petroleum fuel and air. No one is breaking boundaries here and developing new products, we're using a fuel pump to pump gasoline into a combustion engine to to blow it up, controllably, and push a piece of metal down to turn a shaft of metal to make power via that process. Not brain science nor rocket surgery.

btw You need to update us on your record stuff

i do believe this is the smartest thing alpha has posted. ever.

[AlphaJaguar5]

Originally Posted by Area47

i do believe this is the smartest thing alpha has posted. ever.

lol, I have my moments.

I just like making fun of people more, not debating translateral theory of thermodynamic products

Really, I just hate debating on the internet. I used to but I think so fast that unless I'm talking to you it's useless. I just hate sitting here and transcribing my thoughts. I swear if I followed you, witt and djt around with your fuel pump and air flow crap I would sit here for AT LEAST 2 more hours a day lol.