Originally Posted by aussie (Post 170961)

this is one of my main problems to much difference in the slang i think i might be better in a aussie forum @MJ how do i leave this forum yhere seems to be nothing in the cp to do it with i hope im not a prisoner with and u yangs

Originally Posted by Destroyer (Post 171004)

Why do you have to leave? Several members, myself included, are members of other websites also. If you really wanted to leave, just stop coming here. People come and go all the time. But I really don't understand why you would want to leave. No one's attacked you in any way. As far as I can see everyone's always tried to be helpful with any questions you've had. Yes, there is a language problem sometimes, but it's not really a big problem. I, for one, enjoy your company. and I'm sure I speak for the majority of people here.

Originally Posted by spareparts (Post 169955)

Aussie, build that motor back stock. Don't raise the compresion any above fatory. They had issues with preigniton back when we had good gas and revised the spark timing back 4 degress. Leave the cam alone, use a good rocker system. The performer head is a good idea, you won't have dissimular expansion rates like the cast iron head to aluminum block. You may have to increase the size of the heat exchanger to handle the increased heat transfer from teh aluminumhead. Recurving the distributor isn't going to help as most of the total timing is in before you get to cruising rpm, increasing the curve below planning speed can cause preignition. Buy those other two motors you had listed, use the 4bbl intake and oil cooler off of one of those. Put a pertronix igniton in the distributor and a 1 step colder plugs. You will be happy at the peformance with the 3.7 in its stock form. If you want to go faster, put a V8 in the boat. Most of the mods you have listed will work great if the engine was in a car, but in a boat, you will have longevity issues, along with peaky peformance(especially with a heavy boat like a V), don't try to turn the motro any higher than 5000 rpm, the drives don't like high rpm. You'd be surprised how well the boat will perform in stock good condition. I understand your desire to build it bigger and better, but I don't think you are going to get the return from your time and money you are looking for with this combo.

Originally Posted by spareparts (Post 171145)

Sounds like you are on the right track. use the KISS method, Keep It Simple Stupid, or the way I usually do it, Keep It Stupid Simple. BTW, if you go to the machine shop with this motor, have them look at the cam shaft bores. One of the issues with the 3.7 motors is they loose oil pressure after they get hot. the problem is the cam rides directly in the block, no cam bearings. There is a service replacement cam bearing that has to installed by a machine shop(cam bore has to be overboared then new bearings installed). Might be worth checking into see you're going this far

Originally Posted by spareparts (Post 171215)

no reason to do that and you'll only complicate issues, , you'll never notice the difference in hp and only introduce another item to fail.

see the KISS method outlined above