9z S10 blazer 4x4 4.3 cam swap better MPG
 

Hi all I am ordering a rebuilt short block 4.3 letter Wfrom www.cmengines.com for 540, i will have the heads rebuilt, and i was going to install the original cam, but is there a better cam I can use for better Gas MPG, if so who would make one? will I need to make any computer mods? would headers help also? the Muffler looks to be 75lbs LoL its just friggin huge, so i will be yanking it off for a smaller lighter one..

thanks for any info

Don

RE: 9z S10 blazer 4x4 4.3 cam swap better MPG
 

I would contact Comp Cams or another cam manufacturer of your choice for recommendations for your vehicle. They will know the application and can best recommend a cam for your needs.

RE: 9z S10 blazer 4x4 4.3 cam swap better MPG
 

I installed a Comp Cams 260 AHR camshaft kit in mine. I did the full kit. Better MPG and power. Worked out well with stock injection and PCM. I have the non-balance shaft 4.3 (262 C.I.D.) engine. Contact Sam Culp at comp cams, he's a BIG help.

RE: 9z S10 blazer 4x4 4.3 cam swap better MPG
 

how long did it take to do, how much$$$$ and how much did ure mpg change?

RE: 9z S10 blazer 4x4 4.3 cam swap better MPG
 

I purchased the K-kit from comp cams. I think it was around $700 for the kit. I also did it as a part of an engine, transmission, T-case, front and rear diff overhaul. I am seeing about 21 hwy MPG and it has a LOT more power. I did nothing to the exhaust, it's all stock. I was only getting around 17 hwy MPG before the work. I did all the work myself, I am an ASE certified tech. The labor was only blood, sweat, and tears!