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Forum: General Q & A

12-27-2008, 01:17 PM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

I can almost garrantee the plenum is too small...

I can almost garrantee the plenum is too small for peak power. I've seen bigger plenums on small blocks. The only thing you lose with a bigger plenum is throttle response, but even that isn't much...

Forum: General Q & A

12-27-2008, 01:07 PM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

I'd love to hear more about what you did!!! ...

I'd love to hear more about what you did!!! Where did you cut the divider? Did you stay with the o-rings, or just make gaskets? What did you do to the lower?

Forum: General Q & A

12-23-2008, 06:19 PM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

Was just talking to a tech at K&N about a flame...

Was just talking to a tech at K&N about a flame arrestor for this throttle. He was asking me questions and said: "have you removed the walls between the runners in the top plenum?"

Apparently...

Forum: General Q & A

12-13-2008, 01:43 PM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

nice to know. When I had an 800cfm holley, I...

nice to know.

When I had an 800cfm holley, I had 1.4 inhg manifold vacumn at full throttle. I put an 850 on it and it went to .9 inhg. I will be interested in seeing what it's at with this setup...

Forum: General Q & A

12-13-2008, 10:23 AM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

I thought of doing that. It wouldn't be very...

I thought of doing that. It wouldn't be very hard, and starting from scratch with the top would be the way to go. I've got a TIG in my shop and have made complete manifold in the past.

This may...

Forum: General Q & A

12-12-2008, 02:41 PM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

That started to look like it was going to be a...

That started to look like it was going to be a REALLY helpful thread. Too bad they never followed up with the promised data.

My power peak with the carb was 5300-5400, and I would hope to get...

Forum: General Q & A

12-12-2008, 10:34 AM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

The engine made 550hp with a carb. 45ss is right...

The engine made 550hp with a carb. 45ss is right and I would have fabricated a completely custom manifold if I wanted to run bigger displacement or higher rpm. If I end up wanting more than 600hp,...

Forum: General Q & A

12-11-2008, 09:53 AM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

Wow, no one wants to comment on this? Has anyone...

Wow, no one wants to comment on this? Has anyone even heard of someone doing work on this manifold?

I took some more detailed measurements, and I think it's probably tuned for 4200-4300rpm.

Forum: General Q & A

12-09-2008, 01:22 PM

Replies: 24

Modifying AZM/HP500 manifold

Views: 2,420

Posted By bcarpman

Modifying AZM/HP500 manifold

Just wondering if anyone out there has experience modifying the HP500 EFI manifold for peak HP?

This manifold has runner lengths tuned for right around 4000-4200rpm. This is a great all around...

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