What size pulley?
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DV327
- SE Member

- Posts: 14
- Joined: Fri Feb 22, 2013 3:01 pm
- Year and Trim: 2002 Bonneville SSEi
- Location: Ottawa, IL
What size pulley?
I have done all the maintenance and added 180 thermostat, headers, and FWI. Engine must be breathing better. Boost gauge shows 6.5 at WOT. Which size pulley would be best for a daily driver? I plan on a tune with the pulley change. TIA. 2002 SSEi, BTW.
- nos4blood70
- Certified Bonneville Nut

- Posts: 9522
- Joined: Mon May 10, 2010 6:11 pm
- Year and Trim: 2003 SLE
- Location: Chicago, IL
Re: What size pulley?
You should be able to swing a 3.4 after the tune. You can put it on before the tune but I wouldn't beat on it till it's tuned. I assume you have something like an Aeroforce to scan for knock with correct?
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DV327
- SE Member

- Posts: 14
- Joined: Fri Feb 22, 2013 3:01 pm
- Year and Trim: 2002 Bonneville SSEi
- Location: Ottawa, IL
Re: What size pulley?
Aeroforce is ordered. What kind of boost will the 3.4 generate?
- WhiteArrow3800
- Moderator / Social Dev

- Posts: 5962
- Joined: Tue May 20, 2008 11:52 pm
- Year and Trim: ___
2001 Bonneville SSEi
2009 Pontiac G8 GT - Location: Williamsburg, Va
Re: What size pulley?
You should be able to safely run a 3.4 pulley and looking at around 11-12psi. It would be best to have the aeroforce gauge or a scanner that will read KR and check that before putting a smaller pulley on. If for some reason you already have KR issues a smaller pulley is only going to make it worse.

'93 SSE "Guinevere" RIP 1993 - 2019
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Achievements: Guinevere - 264k mi | 16.27 @ 84.10mph | March '11 COTM :: Chloe - 223k mi | 13.85 @ 102mph | January '09 COTM :: Abigail - 192k mi | 12.85 @ 112mph


