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Forum: General Q & A

12-01-2018, 07:52 AM

Replies: 35

502 MPI build up

Views: 7,088

Posted By articfriends

The tpis tb leaned motor out from 4500 up,...

The tpis tb leaned motor out from 4500 up, especially from 5200/5400 up, picks up about 8 to 10 on a stocker 502, closer to 15 on a modded 502 or 540. If you bolt a gen6 fa or pos hardin/rex marine...

Forum: General Q & A

12-01-2018, 07:45 AM

Replies: 35

502 MPI build up

Views: 7,088

Posted By articfriends

I bought some 1 7/8 vette headers to try,...

I bought some 1 7/8 vette headers to try, thinking they will bump bump up tq close to what manifolds made and knock off some top end hp, if they dont, ill buy some other ones. Its a big pia for me to...

Forum: General Q & A

11-30-2018, 06:10 AM

Replies: 35

502 MPI build up

Views: 7,088

Posted By articfriends

muffled boat headers or dyno headers? Like i...

muffled boat headers or dyno headers? Like i said, at the 530 ish hp level, imco powerflows (with water going into the exhaust stream) were down 21 hp at 5400 vs dry dyno headers w gibson 5" boat...

Forum: General Q & A

11-29-2018, 01:05 PM

Replies: 35

502 MPI build up

Views: 7,088

Posted By articfriends

I recently tested my muffled dyno headers against...

I recently tested my muffled dyno headers against imco powerflows w short risers on a 500efi with bigger tb other wise stock. At 5200 the powerflows gave up 14 hp, at 5400 gave up 21 hp, gained 10 ft...

Forum: General Q & A

11-27-2018, 11:04 AM

Replies: 35

502 MPI build up

Views: 7,088

Posted By articfriends

I saw 560 hp in dyno trim from a 502 w modded...

I saw 560 hp in dyno trim from a 502 w modded intake, 68 mm tb, 731 cam and lots of tuning on 89 octane. Iron heads w mild porting. Tpis bores throttle body from twin 60 mm stock to 68 mm for 270$ btw

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