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M62 Swap...

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30%?

M90 rotors are 1800 g IIRC.

How much are TVS rotors you plan on using?

Guesimation would suggest that since they're 80.5 cu in (your math) and compared to 90 cu in rotors, you'd see a much smaller difference.

mp90g2.jpg


Thats for a gen V M90.

lets guess 12 900 RPM for a 3.2.

14 785 for a 2.8.

Lots of parasitic loss.

Hey lets compare to the Gen V M62:

mp62g2.jpg


~48 HP for driving to ~33 HP.

thats 15 HP.

Just from switching blowers.

Not even touching the tune.
 
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SnowFlake said:
I plan on seeing how things go with how much timing I can pull out of it vs how much boost I can run.

My theory is that I'll be able to run a 2.8 pulley on the TVS which will yield me about 12psi. Delta temps should be roughly 50-75 degrees lower than a GenV at 10psi which will allow for more timing. Additionally the drag on the motor will be substantially less, something like 30%. And of course I'll be going to 42lb injectors.

So much for the apples to apples thing huh?? And Ive been saying the whole time 42's on the gen5 setup now would open up the setup a ton.
And if your concerned about engine drag buy a turbo......
Click to expand...
 
matt5112 said:
30%?

M90 rotors are 1800 g IIRC.

How much are TVS rotors you plan on using?

Guesimation would suggest that since they're 80.5 cu in (your math) and compared to 90 cu in rotors, you'd see a much smaller difference.

mp90g2.jpg


Thats for a gen V M90.

lets guess 12 900 RPM for a 3.2.

14 785 for a 2.8.

Lots of parasitic loss.

Hey lets compare to the Gen V M62:

mp62g2.jpg


~48 HP for driving to ~33 HP.

thats 15 HP.

Just from switching blowers.

Not even touching the tune.
Click to expand...

I could be wrong on this one but it makes sense to me. While I'm not sure how much the TVS rotors weigh I thought the fact that there were 4 smaller rotors instead fof 3 big rotors it would cut back on how much drag there is since it's like 4 little fins spinning rather than 3 big ones.... I'm not entirely sure about that one though. Regardless the actual weight of the blower rotors has to be less as well.

Not2Fast: Turbo Calculator
This is where I'm getting my temp info... the difference in outlet temps is going to be massive.
 


SnowFlake said:
Good call dude... Not that this swap isn't less now than what the average GenV swap cost around the time of that thread.
Click to expand...

My point is Im 100% sure your not the only one thats thought of this your just the only one thats stubborn enough to try it anti IC enough to try it ect..... LOL

Yes the availibilty was an issue back then yet again I highly doubt your the 1st person to try this and if it worked remotely well Im pretty sure it would be much much more popular.
 
I'm stumped as to why no one has tried this before... I believe it's because the vendors/shops gave up on 3800s for the most part. They all moved on to Cobalts, Camaros, G8's and other performance vehicles. And just because I don't want to put an intercooler on it yet doesn't mean that isn't an option down the road.

I'm not sure I'm going to need a completely custom manifold. I still think I can get away with welding the BBV port to the LIM and drilling/tapping new holes... we'll see.
 
Im not going to **** on this like everyone else. Im interested its expensive but its nice to see something different, its just a shame to see everyone trying to crucify you for not going the typical route.

Oh and if worse comes to worse and you cant make the bbv work i say plug it up
 


shawnschuldt said:
Im not going to **** on this like everyone else. Im interested its expensive but its nice to see something different, its just a shame to see everyone trying to crucify you for not going the typical route.

Oh and if worse comes to worse and you cant make the bbv work i say plug it up
Click to expand...

A BBV from a turbo car should work in between the SC and the TB saying that you'd have to make a spacer to put it on. The BBV is just to keep the TB from getting the surge when off the throttle.
 
Yeah thats why its there, car would be horrible to drive with out it, you would have to run in PE mode all the time and the car would really be street able. I am interested to see how this works for ya. After I get a built trans for my car I will start on my own custom project, altho mine will have something to do with a snail.
 
what?

You'd just have more parasitic loss when not going WOT.

Thats what the BBV is for in our blowers.

Fuel economy.

When the TB slams shut in our cars the blower can't make boost anymore...

All you do by closing the BBV all the time is force the air to be drawn through the rotors, which increases its power draw.
 


Speaking of thats ^^^^^^^^^^^ the car I wanted to see a dyno sheet from vs snowflakes setup. TON's car should be making over 300 with the E85 I'd hope.
 
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