How much PSI on ATI Pullies?????
Thread Starter
Staging Lane
Joined: Aug 2002
Posts: 92
Likes: 0
From: Connecticut
How much PSI on ATI Pullies????? Ok i called ati a while ago and they told me a 4.00 pulley on a d-1 is rated for 8psi, has anyone seen 8 psi like they claim on a stock motor. Also i have a 3.6 pulley now hoping for like 10psi, is this what im gonna see. someone explin to me what these pullies put out on a stock motor im so confused and i dont want to blow the stocker up just yet lol.
3.6= ?
4.0= ? <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />
3.6= ?
4.0= ? <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />
Moderator
Joined: Nov 2001
Posts: 3,048
Likes: 12
From: Raleigh, NC
Re: How much PSI on ATI Pullies????? First, the D1 is a different SC from the D-1SC.
If they took you literally, you may not have gotten the answer you were looking for.
The D-1SC with the 4.10" pulley at Sea Level and stock motor with stock exhaust is about 5 PSI at 6000, approaching 7 PSI at 6300.
The 3.20" pulley with the same is about 12 PSI.
With headers, about 10 PSI.
4.10 pulley is about 3 PSI at 6000, peaking at 5 PSI around 6800 RPMs on a 422 CID engine with heads/cam and headers. 3.20 pulley will give about 8 PSI at 6000 RPMs and up.
I told you those, because those are the ones I know. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
If they took you literally, you may not have gotten the answer you were looking for.
The D-1SC with the 4.10" pulley at Sea Level and stock motor with stock exhaust is about 5 PSI at 6000, approaching 7 PSI at 6300.
The 3.20" pulley with the same is about 12 PSI.
With headers, about 10 PSI.
4.10 pulley is about 3 PSI at 6000, peaking at 5 PSI around 6800 RPMs on a 422 CID engine with heads/cam and headers. 3.20 pulley will give about 8 PSI at 6000 RPMs and up.
I told you those, because those are the ones I know. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
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From: Chi-Town, IL
Re: How much PSI on ATI Pullies????? With my D-1SC 10.5:1 compression car, heads/cam headers, I saw 6psi with a 3.6" pully......but now I'm dropping compression a full point, so it should be getting redynoed soon...
