Forced Induction Buyer's Guide | $5,000 +/- (otd) | Daily Driver Spec

[cdrazic93]

Originally Posted by OrbitalEllipses

Cooling can always be improved (SC or turbo, don't matter) - reciprocating assembly wear, however, requires thousands in parts. We can say this engine is stout, but we'll know in a few years when people have ~60K on their FI setups.

I think tho, in general this engine should be fine. the EJ design wasn't as good as this, yet the STI and WRX both had cast pistons on boost (disregarding the cr)

Now regarding that CR:

as long as low boost is applied, and boost creep is kept in check and people use the right wastegate springs, a proper tune, then 99% of the time the engine will pur like a kitty!

[cdrazic93]

Originally Posted by CSG Mike

He's on E85...

I know, but is the MPG loss from a S/C on E85, 50%?

[CSG Mike]

Originally Posted by cdrazic93

I know, but is the MPG loss from a S/C on E85, 50%?

No, but you lose 35-40% from E85 alone. Add that to driving with a heavy foot...

[cdrazic93]

Originally Posted by CSG Mike

No, but you lose 35-40% from E85 alone. Add that to driving with a heavy foot...

Jesus. I've never ran with E85... I mean the power makes me want to, but I'm scared with my lead foot I won't get more than 20 feet from the gas station before having to fill up again haha

[CSG David]

Originally Posted by cdrazic93

I know, but is the MPG loss from a S/C on E85, 50%?

Stoic AFR for E85 is 9.8:1 I think. That should give you a general idea of what fuel consumption should be.

[cdrazic93]

So, is there any relationship between that stoic AFR and power % increase?

[CSG Mike]

Originally Posted by cdrazic93

So, is there any relationship between that stoic AFR and power % increase?

E85 cools the charge more and has higher effective octane. The specific energy of E85 is actually lower than gasoline, but the previous mentioned benefits allow you to make power more efficiently.

[OrbitalEllipses]

Originally Posted by CSG Mike

The specific energy of E85 is actually lower than gasoline

Hence the poopy mileage.

[cdrazic93]

Originally Posted by CSG Mike

E85 cools the charge more and has higher effective octane. The specific energy of E85 is actually lower than gasoline, but the previous mentioned benefits allow you to make power more efficiently.

So lower specific energy, but much higher octane which allows much higher compressibility, resulting in higher numbers, and safer fuel (relatively) due to cooler charge... I always see those shows on Velocity where they find a barn car with aviation gas in it, hasn't run in 40 years, and starts up perfectly. why? Same basic principle?

[cdrazic93]

Originally Posted by OrbitalEllipses

Hence the poopy mileage.

Excellent choice of words Orbital lol

[SirBrass]

Originally Posted by cdrazic93

So lower specific energy, but much higher octane which allows much higher compressibility, resulting in higher numbers, and safer fuel (relatively) due to cooler charge... I always see those shows on Velocity where they find a barn car with aviation gas in it, hasn't run in 40 years, and starts up perfectly. why? Same basic principle?

That, and av gas is lead-based. You do have to be careful about water with high E fuels, though, b/c of ethanol's hygroscopic nature..

[OrbitalEllipses]

Originally Posted by cdrazic93

Excellent choice of words Orbital lol

My degree is not in English.

[cdrazic93]

Originally Posted by OrbitalEllipses

My degree is not in English.

Oh no, I would have said the same thing!

[cdrazic93]

Originally Posted by SirBrass

That, and av gas is lead-based. You do have to be careful about water with high E fuels, though, b/c of ethanol's hygroscopic nature..

Already noted, thought about running E85 fuel, most store in sealed drums. I would probably use 55 gal drums in my garage.