Pulley & Tunes E85

Not sure
Headers are so susceptible and subjective depending on who you talk to
I’m certainly no help with that
I just do what my builder say lol

Hoping someone that's been there will offer some insight.

I hear numbers thrown around
2.85 upper 4-5 lbs
10% lower 3-4 lbs
Stock motor 11-12 lbs
boost ranging from 18-21 at sea level??

Is all this with stock exhaust?

coanan said:

Hoping someone that's been there will offer some insight.

I hear numbers thrown around
2.85 upper 4-5 lbs
10% lower 3-4 lbs
Stock motor 11-12 lbs
boost ranging from 18-21 at sea level??

Is all this with stock exhaust?

Click to expand...

2.85 = 3 to 3.5 psi
ATI 10% = 3 psi
Stock motor = 11.5 psi
This is at sea level
You lose around .5 psi each 1000ft that's without counting the DA.
I'm at 2500ft above sea level in Arizona, my car will not get to 11 unless it's a cold winter day. In the summer I have seen 9 psi.
I'm getting ready to get all my parts installed
ATI 10% and pinned crank, 2.75 upper, FIC 1200, Twin 295 pumps in the basket, E85 tune for race day and custom tune for 91 with a 3.25 upper pulley swap for daily. Later will be doing my FI Interchiller stage 2 with a ported blower.

Thanks.
What do you think the loss in boost be with 1 7/8 headers and 3" cat-back?

Which upper pulley system are you going with?

coanan said:

Thanks.
What do you think the loss in boost be with 1 7/8 headers and 3" cat-back?

Which upper pulley system are you going with?

Click to expand...

Probably around 2 psi and you won't gain anything. The exhaust system in these cars has a great flow characteristic, unless you only want more sound. I only did a mid muffler delete which in my opinion makes it sound great.
For pulleys I'm using Griptec 2.75 for racing on E85 and a 3.25 for daily on pump 91.
Lower is ATI 10%. This combo should put ma around 920-930 wheel. I know several cars around here with this combo and there at 920-930 whp. With a ported blower and 105mm throttle body should get closer to if not 1000 whp. In the near future I will be getting a FI Interchiller stage 2 which will keep the power consistent at or above the 1000 whp mark.
I know I can get it there just takes time

Fat Kat said:

Probably around 2 psi and you won't gain anything. The exhaust system in these cars has a great flow characteristic, unless you only want more sound. I only did a mid muffler delete which in my opinion makes it sound great.
For pulleys I'm using Griptec 2.75 for racing on E85 and a 3.25 for daily on pump 91.
Lower is ATI 10%. This combo should put ma around 920-930 wheel. I know several cars around here with this combo and there at 920-930 whp. With a ported blower and 105mm throttle body should get closer to if not 1000 whp. In the near future I will be getting a FI Interchiller stage 2 which will keep the power consistent at or above the 1000 whp mark.
I know I can get it there just takes time

Click to expand...

Thanks. Trackhawks don't have the same manifolds as the Hellcats, it's a cast log type.