72 Blazer
Posted: Wed Nov 04, 2015 11:28 pm
Hi all,
I've been working on fuel injection for a couple years now. My wife bought me my first MS kit for Christmas 2013 (MS 2 v3.0). I now have it assembled and running (very well) on my 1972 4x4 Blazer. The engine is a later model small block (1998 or so) with roller cam and vortec heads. The engine is freshly rebuilt (currently 14000 miles). It was only barely broken in when I started the EFI conversion. My kids and I built the engine in our garage. The injection is via a Holley 670 cfm two barrel TBI.
I've spent tons of time reading and tuning and I'm finally comfortably able to say it's a total success. Don't get me wrong, it's been running reliably for almost all of the last two years. Exactly one year ago I made a 1500 mile round trip from my home in Texas to my old stomping grounds in far north Missouri to do some hunting and it made that trip without a glitch. Pulled down a high of almost 14 mpg and started with nothing more than a single turn of the key down to 5 degrees F. Don't laugh at the mileage, it has 35" tires, 4" lift, 3.73 gears and a three speed (no od) trans. I cruise at 3000 rpm. 14 is probably the best this truck has ever seen. I've been through several iterations starting with fuel only on B&G code, then to extra code and spark control. I'm currently using all the features that I know of including cl idle control, ego, and eae. They all seem to be working seamlessly and the truck is an absolute pleasure to drive.
I'm leaving next week for the "annual" hunting trip and this time I'm taking my 14 year old copilot and tuner. I'm really looking forward to this years trip. The only thing haunting me right now (which hasn't been a problem in past) is a cold start surge that starts after ASE and lasts for a minute or so. I may post a question about that in the tuning section.
Well that's my story. It's been a great learning experience and I'm thrill to say I built it, I tuned it, and I understand it.
I've been working on fuel injection for a couple years now. My wife bought me my first MS kit for Christmas 2013 (MS 2 v3.0). I now have it assembled and running (very well) on my 1972 4x4 Blazer. The engine is a later model small block (1998 or so) with roller cam and vortec heads. The engine is freshly rebuilt (currently 14000 miles). It was only barely broken in when I started the EFI conversion. My kids and I built the engine in our garage. The injection is via a Holley 670 cfm two barrel TBI.
I've spent tons of time reading and tuning and I'm finally comfortably able to say it's a total success. Don't get me wrong, it's been running reliably for almost all of the last two years. Exactly one year ago I made a 1500 mile round trip from my home in Texas to my old stomping grounds in far north Missouri to do some hunting and it made that trip without a glitch. Pulled down a high of almost 14 mpg and started with nothing more than a single turn of the key down to 5 degrees F. Don't laugh at the mileage, it has 35" tires, 4" lift, 3.73 gears and a three speed (no od) trans. I cruise at 3000 rpm. 14 is probably the best this truck has ever seen. I've been through several iterations starting with fuel only on B&G code, then to extra code and spark control. I'm currently using all the features that I know of including cl idle control, ego, and eae. They all seem to be working seamlessly and the truck is an absolute pleasure to drive.
I'm leaving next week for the "annual" hunting trip and this time I'm taking my 14 year old copilot and tuner. I'm really looking forward to this years trip. The only thing haunting me right now (which hasn't been a problem in past) is a cold start surge that starts after ASE and lasts for a minute or so. I may post a question about that in the tuning section.
Well that's my story. It's been a great learning experience and I'm thrill to say I built it, I tuned it, and I understand it.