Pick your upgrade for Twin 5.7s
 

I bought my 86 Daytona on Ebay a few years ago. It has twin 260 HP small blocks. I just installed a counter rotation Aplha 1 lower and switched to 23p Mirage props. WOP is 4500rpms at 61mph on gps. I am looking for advise about my next performance mod. The boat is all stock power with prop exhaust. My budget call for one a year because it's a twin and you always have to buy two of everything.
Pick whats next!
1. Thru hull exhaust w/manifolds.
2. External steering.
3. Drive showers.
4. KNN air filters.
5. MSD ignition modules.
6. Carb & intake.
7. 383 small blocks.
8. You tell me.
Please help.

Re: Pick your upgrade for Twin 5.7s
 

#3 "now" $130.00 X 2
#1 Let It Breath
#4
#6 Nickerson For Carbs
#7
#5 Your Going To Get Beat Up On This One I Have It On My Sbc And I Can Tune Timing And Rev Limiter
#2 Only If Your Going +70 ???

Re: Pick your upgrade for Twin 5.7s
 

Thanks I guess showers are cheap insurance. I was concentrating on the steering but I think I would enjoy the pipes.

Re: Pick your upgrade for Twin 5.7s
 

Save your money for gas and enjoy what you have. Its takes alot of HP to gain MPH.

Re: Pick your upgrade for Twin 5.7s
 

The only thing on that list that will make it go faster is #7.
A cam swap might help top end if your existing heads will flow the extra volume. If not, make it a cam and mild head work. Then change the exhaust.
BTW, your drives probably wont hold up to blower or big block power.
Gary

Re: Pick your upgrade for Twin 5.7s
 

I want to get to 70mph. I think it can be done with the motors at 5200 at WOT. I would think that the stock 260HP motors could be hopped up enough to get it done. I know the boat can handle it.
If I settle for 60 should I change the props? It comes on plane OK with the 23s.

Re: Pick your upgrade for Twin 5.7s
 

If it were my boat, I`d upgrade the heads, cams, intake and carb.
While I had the manifolds off, I`d cut holes in transom and put the exhaust out the back...make it loud.

You probably won`t hit 70 with those parts, but mid-60`s should be possible.