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Forum: General Q & A

05-10-2017, 10:01 PM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

Thanks F-2 Speedy! And yes, changing all...

Thanks F-2 Speedy!

And yes, changing all that you mentioned before putting engines back in. Actually changing to bronze impeller housing...

Forum: General Q & A

05-10-2017, 12:58 PM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

Update: Sold the heads! FYI - have the...

Update: Sold the heads!

FYI - have the following parts for sale. If I don't sell them soon I'll list them on eBay.

1) Gaffrig twin throttle controls (4) in color Yellow. Setup pattern is...

Forum: General Q & A

04-28-2017, 08:24 AM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

You brought up an interesting subject; spark...

You brought up an interesting subject; spark plugs. I was thinking of having them changed before dropping in the engines. What spark plugs do you use? Saw a thread on here and most guys were...

Forum: General Q & A

04-27-2017, 10:46 PM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

Liquidlounge are you saying us stock guys are...

Liquidlounge are you saying us stock guys are old? Lol! Not 50 yet but working my way up there! I've only heard great things of these 502 Mag motors so happy I was able to purchase a good pair. And...

Forum: General Q & A

04-24-2017, 12:20 AM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

Guys thanks for all the feedback. Made up my...

Guys thanks for all the feedback. Made up my mind! They're staying stock and going in the bilge asap!

Griff...have you ever had injectors cleaned? What's your top end rpm's? Heard if you clean...

Forum: General Q & A

04-23-2017, 11:56 AM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

Griff / SecondWind...thanks for your responses....

Griff / SecondWind...thanks for your responses. My 502's our ready to go as they are. The thought of any disassembly makes me cringe! Lol!

From research my boat (Pantera 28') will be at the 78-80...

Forum: General Q & A

04-23-2017, 11:52 AM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

Landfish, Can you please elaborate? To...

Landfish,

Can you please elaborate?

To my understanding these engines will turn 5k rpm's. Would these heads add another 1k rpm's? Whats that in HP and Torque?

Forum: General Q & A

04-22-2017, 01:19 AM

Replies: 21

502 MAG MPI - upgrade heads or stay stock???

Views: 17,619

Posted By ajc7200

502 MAG MPI - upgrade heads or stay stock???

Friends need advise on the following...

I recently purchased a pair of stock 502 MAG MPI's. Except for the Stainless Marine Exhaust everything else is stock.

Before purchasing these engines I...

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