welcome what kind of boat lets see some pics.

we have a 78 southwind and built about 550 hp bbf and cracked the hole three times one chine up from the stringers both sides. I talked to a couple people as to and the first thing they asked was did I add more hp. Then blamed it on that. When I fixed it the last time I added two layers to the hole bottom of the floor. It hasn't cracked and it has been about 8 years. even with the added weight  the boat goes 76 mph 550 hp bbf.

well it has been a while I lost my pump the next time out have a donor pump in it to finish out the summer.
when back out after closing plug gap. still did it switched to hotter plug still did it. put the a/f sensor back in and found it going way lean. added jet till I got to 96 99 and a power valve in the sec. got better but still layed over. took it home and tore the top end off and found blower gasket not sealing.found fuel in the side chambers of the intake. Put new gaskets in it and got it refired today. will be back on the water later this week but am pretty sue that that is the problem. I went back to 88 96 for jets and no power valve in the sec.keeping the hotter plug in it.

well I have been fighting the tune on my motor all year. I have been jetting the heck out of it all over the board to find out that my dist. was broken and advance that i thought was locked out wasn't intermitently. got that fixed and it now is running ok I can actualy drive around the lake now.

blown 540 afr 345 heads deamon 850 blower carbs 716 solid roller cam 5lbs of boost
88 jets in primarys 96 in sec boost ref power valves (4.5) timming locked at 28 deg.
37 squirters primary 31 sec. no intercooler
symptoms: pops through carbs sometimes when i punch it like a lean pop and at 5000 rpms it lays over like it is out of gas and if you stay in it it comes and goes it will start excellerating again then lay over then excell again.seams like when it starts making boost is when it starts to lay over.

fuel system:aeromotive a1000 with there filter and bypass reg. 7lbs of fuel psi all the time. have the hard line fuel kit on the carbs
 
any ideas. to little jet? not enough timing? to much jet? Have went down to 82 prim 85 sec jettting and it would lean pop bad
went back to the 88-96. The plugs are black as if it was rich but it pops like it is lean.

 My 1979 youngblood tx-19

my dad posted it on forum no wake zone cfw today is the posting i have no pics on computer

very nice boat rd!
I have a youngblood tx-19 and have driven my uncles cp and they both seam to handle the same and look like twins.
It has been the best boat I have had. Rides like a caddy. It takes choppy water very well. Had a stock 454 last year. This year its a blown 540.I don't have the tune rite yet but hoping to see 100mph. It falls on its face when the sec. come in. It is way rich. scared to burn it up.

were do you tap at what psi should I see.

a or aa for dominator pump.
Ryan (916)473-3753

LETS SEE SOME PICS EVERYONE AT WORK WANTS TO SEE IT

!979 Youngblood tx-19 with a chevy 454 duel tunnel ram with 600 holleys. Dominator pump set back with droop shoe and ride plate. manual place diverter. Ryan (916)474-4250 (916)473-3753 Will try to get pictures up as soon as i find my cable to download them. $12K

For sale 75 hondo With mounts, oil pan and pickup, twisty bassets, front timming cover, water pump, spring kit on cav plate, ss lines