Headers on procharged setup

[whatsup62]

Not if he is on an HO setup. The 3.2 inch pulley in conjunction with the OEM balancer spins the blower right at Max recommended speed at around 7300 RPM engine speed.

Yep you are correct...still a tad above. From the info that PCTech has offered and from experience when the blower hits its max impeller RPM number its done no gains above that whatsoever other than heat. When I had my HO the smallest I ran was 3.4" and it gave me a tad bit of room to 7500 rpm.

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[Roush05]

Yeah I'm on an HO system. I might go ahead and swap that pulley out today. Do you remember what kind of boost you made with the 3.4? Obviously it varies a lot between altitudes and mods but I'm guessing maybe 2 pounds less than the 3.2.

 

[whatsup62]

Yeah I'm on an HO system. I might go ahead and swap that pulley out today. Do you remember what kind of boost you made with the 3.4? Obviously it varies a lot between altitudes and mods but I'm guessing maybe 2 pounds less than the 3.2.

With the 3.4" (depending on weather conditions) I saw 12-13 psi on average. That's taking it to 7500. Stage 2 d1X now...I was and am on E as well.

 

[SheepDog]

For me, overspinning the blower a tad at the very top of the RPM range is acceptable. Being street car, the engine spends very little time at 7500RPM. I run a 3.25" griptec pulley. I would rather have the additional boost under the curve, where it is more useful

 

[Roush05]

I went ahead and ordered some headers. I think I'm scrapping the meth kit (will be on classifieds soon) and going with headers+manifold+3.4 pulley. I'm wondering though if I go with the headers and manifold if I'd be at a low enough boost that I could keep the 3.2 pulley. Currently at 14-15 psi and about 4-5 degrees of timing being pulled.

 

[Woopaloop]

Yep you are correct...still a tad above. From the info that PCTech has offered and from experience when the blower hits its max impeller RPM number its done no gains above that whatsoever other than heat. When I had my HO the smallest I ran was 3.4" and it gave me a tad bit of room to 7500 rpm.

That may be true, but it will shift the torque curve down and that had it's own benefits for a DD.

 

[Roush05]

What do you guys think about keeping the 3.2 pulley, adding the ported intake manifold and headers, and then just adding enough boostane to get to 100 or 101 octane? Seems to me like it could work.

 

[Roush05]

Headers are on. I'm thinking that this bolt might cause some false knock though and was wondering if anyone else just filed it down or something and if so how they did it. Passenger side near the AC lines.

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