i have a project 86 s-10 blazer that i want to put more hp into but i dont really want to swap engines and all the other stuff that goes along with a new engine. i do work at a machine shop so i can do all of my own machine work. i was thinking of going .060 over if i can any other thoughts for this little v6.

i want to have this as a daily driver and recreation truck so decent gas milage is good.

 

You can convert it to a 3.1L by changing the crank. Personally The 3.4 swap is the way to go. Puts you right up there with the 4.3 guys HP wise and much better gas mileage than a 4.3.

Check out this guys page. A ton of very good info about mods and hop ups.
http://members.shaw.ca/betterthanyou/

 

where can i get detailed info about the 3.4 swap and what all needs to be done?

 

The site I posted above

http://members.shaw.ca/betterthanyou...ine%20swap.htm

I've got a start on my rebuild and swap but waiting on parts and I'm going a lil overboard on everything

http://www.s10planet.com/forum/showthread.php?t=20952

 

oops didn't see the link prolly should look before i type. thanks for the info i wonder what kind of mpgs it should get. can the manifold for the 2.8 carb fit the 3.4? is porting and polishing worth the time. i have never done a rebuild before and this is my project and i want to do it right the first time.

 

The MPG is very close to the 2.8 and often times if you keep your foot out of it can be better. The bigger engine doesn't have to work as hard to move the truck.

The 3.4 except for 2 things is externally the same as a 2.8. The only 2 differences is it has no place for an mechanical fuel pump and no place to bolt the linkage style clutch. On a 86 you shouldn't have either so its all fine there.

Porting and polishing or at least gasket matching is always worth the time IMHO but if you have never done it before or don't have much experience on this kinda stuff I would suggest skipping it. The motor swap alone takes you from 109ish HP to around 160 and that should be good enough. I already told ya I went a bit overboard on mine and it doesn't require everything I've done to it to make the improvement. I'm used to building engines and have been around it my whole life so some of that stuff is second nature to me.

 

the only experiance i have had with engines is at work when me mill or grind or do other machine work to them. as far as porting and polishing i was just curious how to do it i have started to accumulate a few engines when i come across a deal so i have one that is just to experiment on so i can learn things and make mistakes their.

 

Well if you have the want to and willing to learn then a simple gasket match can't hurt a thing. I would stay away from the full out port and polish unless you have access to a good flow bench. Its easy to get carried away and you can actually hurt performance if the runners are not similar. What most guys call a port and polish is nothing but a gasket match with some smoothing of the runners. There are all kinds of writes ups on the net but if you have any questions feel free to ask away.