rebuild

From : scott

Q: i am rebuilding my engine 318 throttle body out of a 1991 dodge full size 4x4. i have 31 tires may go to 33s. i do pull a trailer 4 horse trailer which will be a factor when rebuilding as it is a working type truck. is there some simple or not so simple modifications i can do while getting it done. i just want a little more performance/pulling power without my already poor gas mileage getting poorer - better would be nice. hehehe - i know that will not happen. since i will be getting it done anyway few suggestions would be great - i am not after super performance but just a cost effect way to get a tired motor rebuilt. still runs great - but i expect it will need to be redone sooner or later. thanks in advance scott .

Replies:

From : bob

scott wrote i am rebuilding my engine 318 throttle body out of a 1991 dodge full size 4x4. i have 31 tires may go to 33s. i do pull a trailer 4 horse trailer which will be a factor when rebuilding as it is a working type truck. is there some simple or not so simple modifications i can do while getting it done. i just want a little more performance/pulling power without my already poor gas mileage getting poorer - better would be nice. hehehe - i know that will not happen. since i will be getting it done anyway few suggestions would be great - i am not after super performance but just a cost effect way to get a tired motor rebuilt. still runs great - but i expect it will need to be redone sooner or later. fortunately there are plenty of things you can do that are essentially free and easy to do. heres some thoughts off the top of my head. 1. increase compression to around 9.51 or 10.01. if you can do it with better pistons great. if not then mill the heads a little. 2. mild port/polish job on the heads. nothing radical. no port or chamber shape changes. just polish off the rough spots and get rid of the casting flash. take a close look at the intake manifold too. 3. port match the manifolds; both intake and exhaust. 4. molly rings give you a better seal with less friction. 5. better cam. talk to the tech line at comp cams. they will ask you a bunch of questions and then recommend a good cam for your application. 6. go bigger. swap the 318 short block for a 360. there is no replacement for displacement. -- ..bob 97 h-d fxdwg - turbocharged!! 01 dakota quad sport 5.9/auto/4x4 83 gmc jimmy beater 66 427sc cobra replica - project 66 mustang coupe - daily driver -----= posted via feeds.com uncensored usenet =----- http//www.feeds.com - the #1 group service in the world! -----== over 100000 groups - 19 different servers! =----- .