Built motor = add boost to Race Ported Eaton?

[Posi]

Don't get caught up in boost. Pulley for X boost and then do what you can to make it more efficient. Or as efficient as it can be after it's pullied for max rpm's.

My car now only makes 14 lbs with the 2.9/6lb combo and by 6,000 rpm's it's down to like 11 lbs lol.

 

[Jad G]

Mine is pullied 2.76/6lb but I have a gt500 blower. It breathes a little better especially after posi did his magic and I've done every conceivable thing to keep it nice and cool. The torque is brutal and exactly what I wanted. On the street it makes 21 psi

 

[cobracide]

Larger blower, built motor, different results. The efficiency map is going to be different. Not surprising. Good power.

 

[tonylittell]

So really what I'm looking at is the rotor speeds to figure effiency and not psi.... I'm actually using a 2.60 Richard racing pulley and a 4# lower. Is the diff between the 2.76 and 2.60 taking me out of the Max efficiency? I guess I could put my 2.76 on the mustang and put the 2.60 on my lightning if need be.....

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[PKFIRE]

Do you guys run the even cooling mod with the lower set up? I've been lately thinking about adding a lower to my car. Seems like the next step but I have to add more fuel.

 

[Jad G]

That's my next mod because plugs 7 &8 are white while all the others are nice and tan

 

[CobraBob]

So really what I'm looking at is the rotor speeds to figure effiency and not psi.... I'm actually using a 2.60 Richard racing pulley and a 4# lower. Is the diff between the 2.76 and 2.60 taking me out of the Max efficiency? I guess I could put my 2.76 on the mustang and put the 2.60 on my lightning if need be.....

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Can you test each of the combos at your track?

 

[tonylittell]

Can you test each of the combos at your track?

With the track closed for the year I'm afraid not. That's why I was hoping for personal experiences for reputable folks like Brian, Jake and yourself

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[Posi]

So really what I'm looking at is the rotor speeds to figure effiency and not psi.... I'm actually using a 2.60 Richard racing pulley and a 4# lower. Is the diff between the 2.76 and 2.60 taking me out of the Max efficiency? I guess I could put my 2.76 on the mustang and put the 2.60 on my lightning if need be.....

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To me yes you're past efficiency by testing the things you're asking on the dyno and track.

I've never been one to "shoot for the blowers efficiency rating" or "I'm losing boost so I'm pullied for to much".

I always went off of where the car peaked at in the rpm's and when you added boost and that hp peak started dropping like a rock in the rpm's. Then you don't gain any hp and only torque. At the same time you find this is the same time your IAT's for that day of testing start going up more than the previous pulls.
:beer:

 

[tonylittell]

:thumbup: thanks .... I'll be swapping uppers this weekend it sounds like........

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[Posi]

Shoot come back and post how it does.:beer:

 

[KINGCOBRA86]

When's a tvs going on?

 

[CobraBob]

Do you have a 4-piece idler kit with that 2.60 upper?

 

[tonylittell]

Do you have a 4-piece idler kit with that 2.60 upper?

Yes I do bob. Its a billet flow kit that I replaced with 100mm dual bearing metcos


Why do you ask?





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