Anyone with Whipple and 3.375 pulley

jhatley7 said:

So Saturday a local shop had a dyno day. Car made 701/560 with the 3.5 on 93. Max psi was 12.3 according to boost+ box. This was with a street tune. Sent logs to Lund, said he could add 3-4 more degrees if I wanted. I'm pretty happy with the results.

https://m.facebook.com/story.php?story_fbid=1300191633381654&id=1034889613245192&__tn__=*s

Bdmach1, my c85 came in today and started my tuning with lund. Once tune is good with the 3.5 I will drop down to 3.225.

Click to expand...

Nice!

Do you have the ATI 20% damper too??

BDMACH1 said:

Nice!

Do you have the ATI 20% damper too??

Click to expand...

No sir standard Size.

jhatley7 said:

No sir standard Size.

Click to expand...

Ok....that makes more sense now. I have a 3.50" blower pulley with the 20% damper, hoping for 15-16lbs.

BDMACH1 said:

Ok....that makes more sense now. I have a 3.50" blower pulley with the 20% damper, hoping for 15-16lbs.

Click to expand...

Yes sir!

That's the boost i'm hoping for with my 3.225. If it's not there, I may drop down one more size.

BDMACH1 said:

Ok....that makes more sense now. I have a 3.50" blower pulley with the 20% damper, hoping for 15-16lbs.

Click to expand...

Are you running that now? If so, assume e85, what kind of power are you seeing?

RockStang said:

I might try this on 93+ Octanium and see what the logs look like. Wondering if anyone else has tried it? I am seeing exactly 11psi on the 3.675 so that should put me at 13psi. According to their latest manual, it doesn't require a BAP until you go smaller. I have the 72lb injectors obviously or I'd be asking for a new motor.

Click to expand...

I'm taking the same path as you. Right now I'm running 3.500" on the 6 rib 10 gallons 93 + 5 gallons 104 oct. . I do not have an idea on the boost level as I haven't install my gage yet.

I gained 5 MPH in trap speed from the 3.625" but I'm still frustrated with my results (I want more but safely)

Are you still on the Whipple tune or moved to a different route?

Yes the new Manual says 72lb is ok until 3.375" and until 3.00" with BAP.
Another thing I wonder is what about Octane requirements.

3.625" is OK with 93 Octane
3.500 - ?? Octane
3.375 - ?? Octane
3.250 - ?? Octane

Also at which point it is unsafe to push the bottom end (Boost/Power/Torque).

I'm trying to make an educated decision as well so I moved my concentration to my IRS to improve my lame 1.6494 60' until I decide what to do with Boost/Tune.

ramirj2 said:

Yes the new Manual says 72lb is ok until 3.375" and until 3.00" with BAP.
Another thing I wonder is what about Octane requirements.

Click to expand...

screen shot or picture? Whipples manual? that would be impressive.
-thanks

I believe I have a 3.250 pulley laying around that I could try with 93+ octanium but i figured the 3.5 was pushing it haha

Here goes nothing
http://i1380.photobucket.com/albums/ah182/foxracing19931/IMG_0189_zpsgxv2zdrn.jpg 3.25

https://drive.google.com/open?id=0B9Q7hGnQJsxiaGZHdlhfREM2ZmM

sigintel said:

screen shot or picture? Whipples manual? that would be impressive.
-thanks

Click to expand...

Ok so now i'm confused. I was pushing avg 12.6psi with my 3.5 upper. Now with my 3.25 upper, I'm at 13.6ish. I'm on a 10-rib so should be belt slip any ideas? Car seems to feel stronger and whistles louder at lower rpm. Any ideas on how to troubleshoot?

jhatley7 said:

Ok so now i'm confused. I was pushing avg 12.6psi with my 3.5 upper. Now with my 3.25 upper, I'm at 13.6ish. I'm on a 10-rib so should be belt slip any ideas? Car seems to feel stronger and whistles louder at lower rpm. Any ideas on how to troubleshoot?

Click to expand...

What is there to T/S? With your mods, that seems to be where your boost would be.

Evo_Rob said:

What is there to T/S? With your mods, that seems to be where your boost would be.

Click to expand...

I would think two pulley sizes down would give me more that one psi?

jhatley7 said:

I would think two pulley sizes down would give me more that one psi?

Click to expand...

Did you do the headers or 10-rib in between switching pulley sizes?

Nope. Same day logs. I talked to Mike at Whipple today. He said that sounds about right with headers, so I ordered a 3.0.