hammer01

What Type Of Upgrades Has Any Of You Had To Up The Performance Of The 330 Hp 7.4's. My Good Friend Just Bought A 1999 29 Ol, Mint Condition, With The Twin 330's. He Is Upset With The Low To Mid 60mph Speeds. Any Thoughts That Will Not Destroy Reliability At A Reasonable Cost. Tia For Your Ideas.

smilegas

Did he check speeds with GPS? I have the same stock set-up on a 1997 model and GPS'd @ 69-70. My speedo is about 10 mph off.

JasonSmith

I'm calling B.S. on those speeds. Unless something was done to the bottom of the boat & it is about 1000 lbs lighter than stock 330's won't make a 29 Outlaw run what you say it will.
I have a 99 with 385 a side on Imco shorties, labbed propellers, Dana exhaust & a host of other tweaks & I'm lucky to see 75 on a cold day with no fuel & big choppy water.
There are really no performance mods for a 330 hp 454 that do not cost over $1500 a side that will gain anything in the speed department.
Your friends best bet is to have the propellers labbed by a REPUTABLE shop. He may see 2 more mph for about $800.

BajaRunner

My 29 with 310's will run 63-64 gps. I wouldnt mess with upgrading the 310's. They are reliable as hell and not really meant to upgrade.

smilegas

Just reporting what I saw. With salesman driving, my handheld GPS showed top speed of 69.4mph. Checked two other times with just me in the Baja and touched 70 once and 69.7 the other time.

derekdeben

I agree with 'JasonSmith', get the props labbed and put K&N filters in. I had a '99 H2X with the 7.4 310HP, after many hours of research into new heads, exhaust, computer upgrades etc it was not worth the extra money for a few mph more. If the hull & drives are in good shape it would be better to repower with new motors. I would add the 496 mags and upgrade the cam and computer to make them ho's, who should be around 78-80 then.

hammer01

Thanks For The Input, Which Is Pretty Much What I Had Already Told Him. He Likes To Run A Local River Nearby So I Think The Lab Props Are A Bad Idea. Looks Like He May Be Upgrading Boats If Speed Is A Big Issue.

BajaRunner

I want one of those GPS's

smilegas

I guess its the cheapest 5 mph you can buy!!!

JasonSmith

My handheld is always faster than the Livorsi gauge I have. I'm going to hook the handheld to the Livorsi gauge & go faster with minimal effort.