Can I run stock Y-pipes on a 500HP motor?
06-16-2022, 03:10 AM
#22
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My 99 HP500 has the y pipe and Corsa diverters, but in 99 Mercury put taller risers on the Gil exhaust. I know Hardin sales the taller risers as well for the Gil replacements and I believe Stainless marine has something similar as well. I use my diverters occasionally when going in late or early to the ramp at the Marina it also helps I have large Corsa Mufflers from the factory as well. I try to bump the idle up a little too when using the diverters to the y pipe. As far as pulling the kids on the tube with it closed I would not as it would be too restrictive.
These are the style tails I have and I run the turbulators which probably helps if there is a little reversion.
https://www.cpperformance.com/p-1340...-polished.aspx
These are the style tails I have and I run the turbulators which probably helps if there is a little reversion.
https://www.cpperformance.com/p-1340...-polished.aspx
06-16-2022, 10:45 AM
#23
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I removed the Procharger a while back, but it had a Holley 9022 which was the factory 800CFM HP500 carb. If I remember correctly it was like jetted like 7 or 8 sizes bigger. Something like 85 primaries and 99 secondary's (but I think someone drilled them out). You should reach out to Procharger support and see if they can assist with tuning. It also had the boost referenced fuel regulator with large Aeromotive (possibly A1000 ) pump. At the end of the day tuning with a wideban O2 would be your best bet. Sorry that's about all I recall for the set up.
06-16-2022, 12:36 PM
#24
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I removed the Procharger a while back, but it had a Holley 9022 which was the factory 800CFM HP500 carb. If I remember correctly it was like jetted like 7 or 8 sizes bigger. Something like 85 primaries and 99 secondary's (but I think someone drilled them out). You should reach out to Procharger support and see if they can assist with tuning. It also had the boost referenced fuel regulator with large Aeromotive (possibly A1000 ) pump. At the end of the day tuning with a wideban O2 would be your best bet. Sorry that's about all I recall for the set up.
06-16-2022, 12:57 PM
#25
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Thread Starter
Thank you very much everyone for posting. Ya'll are a great resource and timesaver for me. I think I will go with a muffler or turn down system instead because given the chance I will absolutely eliminate any potential for leaks. Have a nice pair of Y-pipes like new condition if anyone interested. Came off a circa 1989 454 365hp mag.
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TomZ (06-16-2022)
06-16-2022, 01:05 PM
#26
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+ ypipes make working on things even more cramped. So nice without those taking up valuable room.
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06-16-2022, 01:13 PM
#27
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I see your are going to do this.
Make sure to you get the ypipe block off plate and install before you put a motor back in.
Make sure to you get the ypipe block off plate and install before you put a motor back in.
06-16-2022, 10:30 PM
#28
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Platinum Member
