J30a Honda repower

[cameronbezett]

Well been cruising the fourms for a wile now and finally got around to posting. I have a 4m boat with single stage colorado previously turned by a vg30 nissan v6. Went well but sucked gas and was rather heavy engine. After some issues with the ecu I'd had enough of it and sold it. Have now picked up a Honda j30a1 v6 from a 99 accord with ecu etc. Has anyone successfully run one in a boat? Have seen plenty of talk but only one boat overseas with one (fishing boat in asia somewhere, no further info). Seems a good package, light weight and rated at 200hp. Cheers

[Sid]

I haven't but like yourself have been looking at the Honda V6's for a while and wondering why not..?

The J32 increased the bore size but still maintained the same crank... you can get them with the 3 into 1 integral cast headers and horsepower to the 240-250...

They are lighter than the Nissan V6s... I have seen figures of 110kgs for long blocks and should install lighter with a very simple water jacket job on a single header pipe...

I would probably use an aftermarket ecu and stay NA for a real simple install into a 3.6-3.8 hull.

Just need to put some more pressure on Clayton Scott at Southern Jet to get his 7" unit  going and could have a 350-400kg V6 running in a durable small boat....

[Brizz]

+1

https://en.wikipedia.org/wiki/Honda_J_engine

[cameronbezett]

Well have the engine sitting on the floor in the shop now so will be going ahead with it over the coming months. Is the earlier engine with standard manifolds. Plan is to try it out with the stock ecu and see how it goes. Have made starter mount by butchering the original bellhousing and have cut town the torque converter to use the standard ring gear as its not mounted on flex plate. Will try get some photos up later this week.

[glocko]

Were'nt some of the early hondas rotation the wrong way....just thinking out loud

[Sid]

yep but I think all the J series v6s are ok...

[cameronbezett]

Earlier hondas do rotate anti clockwise but there are ways around that. J series and all hondas I have worked on after about 98 rotate clockwise

[Sid]

yep be keen to see your progress..

[glenm]

Have you weighed this engine yourself?

Just curious because wiki reckons 110kg but then I have seen someone else claim it weighs 152kg.

Cheers

[cameronbezett]

No have not weighed it yet, no scales at the workshop, will do when I get a chance. Progress will be slow as i have two other projects on the go atm, hoping to have the engine sitting in the boat within the next month or so

[glenm]

Beauty look forward to following it. You don't happen to know if there would be any issues marinising the later model j30A4's with the exhaust manifold cast as one piece with the cylinder head?

[cameronbezett]

Have heard of it being done, would make the exhaust easier to fabricate. Things to check would be weather it runs drive by wire throttle and they typically have security key to start, easy to get around both with aftermarket ecu

[glenm]

How you getting on with this project mate?

[Moab]

I am thinking of putting one of these in a boat too so I am interested to hear how it goes and what it actually weighs. The jdm j30a s are pretty cheap here and they seem like they could make decent power.

Let us know.

Matt

[odwil]

so has any body done anything about putting a j30 in there boat yet