Originally Posted by Strip Poker 388 (Post 4382107)

I would get back w/ Mark on seeing what he thinks,I know hes been getting close to 600hp w/ the dart steel heads,with that cam i would be turning it higher, might try diff props to get the rpm up, ive got stock heads that i ported with the same cam as u, I would think it would/should pull to 56-5700, make power to there, mine starts to taper off after 57-5800, but again mine blown


remember they will keep pulling on the upper end, mine was only gaining 5-7 hp from 5800 to 6100. the boat is still climbing past 5800,


I know of one 388 that would only run 79,i would think the real number on them is 80-82, and on a real good day 83-84,playing with props should get a little, my factory test report said 86+.5275 and 5300, not sure if thats a realistic or repeatable speed,im sure some hulls are better, like ive heard if the hull stays in the mold longer its usually better,

some weight more that other, diff opts

I know my buddy that was racing a mti and that year they reworked /change the bottom after every race that year, they never got it to the exact same other mti he was racing against that same year, ya just never know with hulls,

Like I always said if our 388's had a 42ft fountain bottom I bet it would pick up a good bit ,especially with bigger power,but what do I know,lol

I know running with the waves, like 1ft it really picks up,lite on fuel feels like putting 4.56 gear in a hot rod.

Best I remember rumor ,back in F2 Fountian would get the 500's with the higher hp,i believe they were around 540, heard of 1 560, but then they started cheating,all kinds of cool stuff, it work they really took off after 2001-2002, but thats old days


I know on mine I would see 80-82 on speedo, built up motors and was making 765, went up 4 prop sizes,ran 99.8 gps first time out,stock 28 bravos, fallowing year went up in boost made 840+. on a rear good it would hit 101-102, when up again883hp, not much more speed,turning props in is when it ran the 105. but was real loose, update breaking drives slowed me down , rather ride and have fun nowdays, also thats a stock 30p 4bl merc props turning 6000, like my data on computers show 128 hours at idle
0-1000 RPM =128.17 Hours
1001-2000 RPM = 16.50 Hours
2001-3000 RPM= 25.04 Hours
3001-4000 RPM = 37.92 Hours
4001-5000 RPM = 3.36 Hours
5001 RPM and up = 21.55 Minutes


good luck:):)

Originally Posted by Velocity Tom (Post 4386928)

Just ran the boat with 1 in imco shortys and same 34 labed 4 blade bravos . Went from 80 at 5000 rpms to 82 at 5000 rpms. And didnt have to over trim. I also had 2 extra people and 50 gal more fuel on board. So it like the shortys. Then i tryed a set of race labed 28 5 blade hydros. 80 mph at 5200. It pulled real hard but no top end. Sending out the 4 blades to mike for loosing up a bit.

Originally Posted by velocity tom (Post 4387772)

send me ur email