stage one of 3.7 dissmantle - Page 2

aussie · #11 03-22-2011, 09:03 PM

WELL NO ONE HAS YET TOLD ME WETHER THESE ENGINES COME OUT WITH FLAT TOPS OR NOT I DO UNDERSTAND WHAT U R SAYING IM NOT TRYING TO BUILD A RACE MOTOR JUST A STRONGER AND BETTER ONE LOOK ALL THESE COMPONETS IM PUTING ON IS WHAT MERCRUISER COULD OF DONE BUT COST IS ALWAYS A PROBLEM JUST LIKE THE EXHAUST PORTS A FEW HOURS OF WORK ON THEM GIVES A BIG RETURN JUST LOOK AT THE SIZE OF THE INTAKE PORTS WHAT GOES INTO THE INTAKE PORT MUST COME OUT OF THE EXHAUST PORTS AND IF U HAVE EVER LOOKED AT THEM THERE IS A BIG RESTRICTION IN THE EXHAUST THE CAM WILL BE CHECKED FOR ITS PROFILE AND REGROUND THE SAME IN A SOLID GRIND NO BIGGER JUST A WIDER TORK RANG AS FAR AS THE COMP GOES ALL THE INFO I HAVE SEEN SAYS THEY HAD FLAT TOPS IN THEM SO COMP WILL BE THE SAME PROVE TO ME THAT THEY DONT HAVE FLAT TOPS STANDARD AND I WILL GO FOR THE DISS TYPE ITS A GOOD IDEA ABOUT THE HEAT EXCHANGER MORE POWER FROM THE ENGINE THE MORE HEAT IT PRODUCES I MISS THAT ONE STOCK IS NOT ALWAYS THE BESY WAY ITS THE CHEAPEST WAY AND COMPANYS LOOK AT THE CHEAPEST WAY TO GIVE U A PRODUCT FOR MORE PROFITS WELL U HAVE TO CONVINCE ME DIFFERENT AND WITH THE COMMENT OF A LONGER CONROD YES IT GIVE U A LONGER DWELL TIME AT TDC AND HELPS WITH HP BUT THE COST OF BUYING RODS AND OISTIONS WITH A DIFF PIN HIEGHT DONT WIEGH UP TO HP TO DOLLARS

hey sorry about the caps lock was half way threw when i realized and i have to look at the keys while i type

aussie · #12 03-22-2011, 09:09 PM

im at 70mph now

RidgeRunner · #13 03-23-2011, 07:31 AM

The longer rods increase dwell and change the angle of attack. Essentially giving the rod more leverage to move the crank and less side loads on the pistons to their bore. It is costly for all modifications and the end result is sometimes less than one would like. I agree with your decision 100% to make it better, especially in the valve train but you need to ensure it is as reliable as possible. That was what I was suggesting earlier. If your car doesn't want to start (like my old 11 to 1 SBC) you just step out onto terra firma and give them shoes a chance. On the water it is a little more complicated. Your approaching terminal velocity..

aussie · #14 03-23-2011, 03:58 PM

i agree totally im not building a race engine just trying to get a better tork range and as i said 10.5 to one was just a guess there not much info on deck hiegts when i get the bottom end together with the new pistons i will have a better idea of compression ratio i dont mind using high octane pump fuel in it at the end of the day it will still be cheaper than running a 2 strokeand if u no 2 stroke engines there pritty flat on low rpm so i cant see how a mild solid cam will afect bottom end power all the mods r to increase strenth ans reliablitiy read a few forum post on other site and some guys r having oroblems with bending pushrods too ill put some picks up of the heads and the bad condition of the vavle tips and rockers and also i read that the blocks were made by volvo

no one has yet told me if 3.7 use flat tops pistons

aussie · #15 03-23-2011, 07:29 PM

well i just changed my mind again must sound like women well i just ordered a new head edelbrock proformer I did think about what u guys said about better to have 2 aluminum parts together expansion rate wil be the same as there is proff of head gasket issues on the 3.7 dont no why merc didnt just make one from the start costing would of played a big part so the project cost just stepped up another $700 when u deduct the price of rebuilding the old head getting the bigger chamber 93cc migh be still too much comp but the plan is to go zero deck hieght and macihe small dish on the piston top to get rite compression ratio well i have till november to finish it so i have time to save my some money well i could save $ 100 a week from not smoking but i dont see that happening