homan

I have a 502 gil dry pipes, waterpump crossover, Msd box, roughly 600 lift cam full roller valve train Dart intake and now the thing in question a 1050 dominator. I was told 600 hp which I believe to be more acurate at the 525or so range. I as well as some others belive I'm overcarbed. So the question is what size and what# jets would be a good starting point If anyone sees me going down the canal I'm not really crying it's just running rich.

Dennis Moore

Sounds like your engine is built to the same specs as a Mercruiser 500 HP. They use an 800CFM marine Holley carb with pretty good results. I can't recall, off the top of my head, the jetting, but you can look it up in a Mercruiser HP service manual. That would put you right in the ball park first time out.
Dennis Moore

Griff

800cfm or 830cfm HP series.

homan

thanks guys just what I wanted to hear I bought an 800 double pump called Merc. and got the jetting sizes, just have to fine tune a bit . I wanted an 830 but was told they're no longer avail. in marine applic.

KAAMA

iTrader: (1)

You'll be fine with the 800

Griff

Merc uses satggered jetting with different jets in every hole.

I had an 800 on my 454 and it was jetted with 78's+/- in the primaries and 94's +/- in the secondaries with no secondary PV and a 6.5 front. Can't remember the exact sizes I ended up with, but they are within 1-2 sizes of those.

robyw1

A good formula to use is cubic inches times MAX RPM divided by 3456.

Now that is if your engine is running at 100% volumetric efficiency. Supercharged engine will run in the mid to high 90s VE and normally aspirated engines will run high 80 to low 90s VE.

Roby

RickR

Early 502 (MCM 465, GM Dual Plane) used a Holley 800 w/
.077 Primary
.086 Port Secondary
.096 Starbord Secondary

Crazyhorse

Buy 1100's now and then whe you build those monster motors next year you'll already have the carbs. just kidding.

homan

If I had anything like 1100's I wouldn't be stuck in the slow lane. The only speed my barnacle barge sees is on the open highway