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502 manifolds

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Old 12-13-2003, 10:58 AM
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Default 502 manifolds

Does anyone know what manifolds are best to improve a 502 mpi? I am looking for improvement in hp and a weight savings. Also what hp can be expected?
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Old 12-13-2003, 11:07 AM
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Either Stainless Marine or Imco.

Good luck!
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Old 12-13-2003, 11:20 AM
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What about EMI or Gaffrig?
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Old 12-13-2003, 12:51 PM
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SO WHAT IS THE BEST PRICE/PERFORMANCE OPTION?
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Old 12-13-2003, 05:20 PM
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Default Re: 502 manifolds

Quote:
Originally posted by FAST353TECH
Does anyone know what manifolds are best to improve a 502 mpi? I am looking for improvement in hp and a weight savings. Also what hp can be expected?
For some unknown reason, Teague swears by IMCO. But I really think CMI's are hard to beat.
 
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Old 12-13-2003, 05:31 PM
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Installed Staines Marine on mine today I'll let you know next week what happens. BTW the instalation was fairly painless.
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Old 12-13-2003, 08:02 PM
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I think a set of dragster zoomies would look kinda cool,,,
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Old 12-14-2003, 07:46 AM
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On twin setups, do you have to pull one of the motors? Or are the manifolds installed with bolts? My '94 had 2 studs per manifold, which would require removal of 1 of the motors. Don't know if same for my '99.

Also, Are the Stainless Marine manifolds the same as far as sparkplug access? My Merc/Gils were a pain.
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Old 12-14-2003, 08:32 AM
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Quote:
Originally posted by formulaz583
Stainless Marine. Great price. Great warranty. I don't know why Teague likes Imco so much. They have the same gasket setup as stock Merc, which just asks for water leaks. CMI are great, but I'm not sure what happens when you put them on a stock 502. SM don't need any computer change. I thought CMI did. They are worth the price just to not worry about water leaks. CP Performance has them for about $1600 with standard risers.
I'm with you on the gasket issue. I don't know why IMCO doesn't get with the "dry-joint" program. Teague claims that their customers have seen significant performance gains ONLY with IMCO on relatively stock motors. I've heard too many good things about Stainless to believe that. I've also had good results with my Gil's.
 
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Old 12-14-2003, 12:38 PM
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I am running the imcos on my boat. I have only ran the boat a couple of times and the boat seems to run alot better.
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