How hard can ported eaton be spun? e85

[WaffleMan]

What prevents the eaton from making more power when "overspun"? Is it just heat, or just the blower simply not able to flow anymore air due to it's small size? I was planning on adding a 4lb lower and ported dragon combo to my 2.70" upper with e85 this summer. But since e85 cools the intake charge I was wondering if there were gains to be had running a 2.8/6lb combo or to even go as far as running a 6lb with my current 2.7? Think a pulley combo as aggressive as this would net good gains with e85 or am I just dreaming?

Blower RPM @ 6500
2.9/6lb - 20397rpm (for reference)
2.7/4lb - 20704rpm
2.8/6lb - 21125rpm
2.7/6lb - 21907rpm

 

[cj428mach]

You need to just save up and buy my Whipple, lol.

 

[matt87]

there have been eatons spun hard and make over 550 rwhp. comes a point of diminishing returns though. i would think long and hard about doing a killer chiller with that combo.

 

[StiEtr]

530whp here with a Posi port, 2.76, #4 lower, and supporting mods.

 

[WaffleMan]

there have been eatons spun hard and make over 550 rwhp. comes a point of diminishing returns though. i would think long and hard about doing a killer chiller with that combo.

I was thinking I wouldn't need a killer chiller due to the e85 cooling the intake charge pretty much doing the same thing?

 

[WaffleMan]

530whp here with a Posi port, 2.76, #4 lower, and supporting mods.

What fuel?

 

[StiEtr]

What fuel?

93:banana:

 

[StiEtr]

My bad it is a 2.8 and a #4...

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[FiveOhJoe]

You can make about 575/595 from what I have seen. I am doing a ported blower with a 2.93/4lb setup on E85.

2.76/6lb is just spinning it too hard. It turns into a heat gun at that point. You really won't make much more power than the 2.93/4lb.

 

[StiEtr]

BTW how much power are you looking for?

 

[WaffleMan]

My bad it is a 2.8 and a #4...

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Geez that looks nice, I see you peaked at 18psi, did you ever dyno with just the 2.8 and port? Interested to see how much boost you made on that.

I have a 2.70 and 2.80 pulley already. Thinking I could just get a 2.9 pulley as well and go ahead and get the 6lb lower. Then attempt the 2.7/6lb on e85 and if its just too much can back it down with switching out my upper pulley while it's on the dyno.

 

[WaffleMan]

BTW how much power are you looking for?

I'd like to make at least 550whp corrected with a like amount of torque. But I'd like to completely max the eaton out to see what it can do on e85. That 575/595 number sounds awesome.

 

[StiEtr]

Geez that looks nice, I see you peaked at 18psi, did you ever dyno with just the 2.8 and port? Interested to see how much boost you made on that.

I have a 2.70 and 2.80 pulley already. Thinking I could just get a 2.9 pulley as well and go ahead and get the 6lb lower. Then attempt the 2.7/6lb on e85 and if its just too much can back it down with switching out my upper pulley while it's on the dyno.

I do believe you will be over spinning it with that combo...... Just try a 2.7+#4 and if that doesn't get you there just spray it:beer:

 

[WaffleMan]

You can make about 575/595 from what I have seen. I am doing a ported blower with a 2.93/4lb setup on E85.

2.76/6lb is just spinning it too hard. It turns into a heat gun at that point. You really won't make much more power than the 2.93/4lb.

Why just a 4lb with the 2.93? Seems like a lot ported guys are running 2.93/6lb without e85. With the cooling of e85 I'd think we'd been able to crank it up even more

 

[90goldtsiawd]

I do believe you will be over spinning it with that combo...... Just try a 2.7+#4 and if that doesn't get you there just spray it:beer:

I like this idea. Spray the house down with a big shot and keep it cool at the same time. These setups love lots of spray especially with E85.

 

[StiEtr]

I like this idea. Spray the house down with a big shot and keep it cool at the same time. These setups love lots of spray especially with E85.

Mine loves it! Ticking head and all never gave me a issue with a 100 shot.

You can view my ticking head thread if you like. I am getting to the bottom of it now.

 

[MrCaliKrome]

I have a 2.70 and 2.80 pulley already. Thinking I could just get a 2.9 pulley as well and go ahead and get the 6lb lower. Then attempt the 2.7/6lb on e85 and if its just too much can back it down with switching out my upper pulley while it's on the dyno.

WaffleMan, this sounds like a great idea. Looking forward to your 2.7/6lb results!

 

[MrCaliKrome]

530whp here with a Posi port, 2.76, #4 lower, and supporting mods.

StiEtr, it would be interesting to see what you could do with this set up running E85.

 

[Brutal Metal]

I would have to think Someone on SVTP has hit the 600 mark on E-85 with the most aggressive pulley setup possible on a ported Eaton..

 

[timspony]

POSI Ported Eaton - 2.76" / 4# Lower / E85 - 549 rwhp 570 rwtq .... 10.89 at 133.2 mph :burnout: