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37 Posts
I just finished rebuilding my first 454! AND I havent had the engine explode and shoot a rod through my thigh. Runs like a top, but here is the question: after putting a couple extra performance parts on the engine, it seems to want to run way advanced. Sounds like it is going to die if I put it where the manual suggests at 4 BTDC. Right now, it is off the charts. I cant even tell what my timing is because the mark is showing up before it even hits the timing shield on the timing cover where I get my readings. If I had to guess, it is probably around 20 BTDC at idle. It runs awesome, but I would like to find a way to fine tune this thing. Any ideas on how to get the timing right to get the most out of this engine? My other concern was that I was off a tooth on my line up of the timing chain when I put that together, but wouldnt I be having other issues if that were the case? Like I said, it seems to run fine.
Just FYI, Yes, I unhooked the brown and black wire under the dash to eliminate the computer's interference before I checked the timing. And no, I dont have access to any fancy equipment or dyno. I wish I did.
Here is what I have done to the engine:
New bearings all around
New Lunati Cam & Lifters 60200LK 207 213 .495 .515 112-LSA
New double roller chain
New Speed Pro 10cc dome pistons
New piston rings that I filed to fit. All bores were in really great shape. I just honed them all and tightened up the ring gap a little.
I did clean up all the ports and did some bowl blending to get as much as I can out of the peanut heads.
I put an adjustable fuel regulator on the TBI to adjust the fuel pressure.
Everything else is pretty much stock.
1995 K2500 Suburban
Gen V 454 (TBI)
4.56 Gears
35" Tires
4l80E Trans
Just FYI, Yes, I unhooked the brown and black wire under the dash to eliminate the computer's interference before I checked the timing. And no, I dont have access to any fancy equipment or dyno. I wish I did.
Here is what I have done to the engine:
New bearings all around
New Lunati Cam & Lifters 60200LK 207 213 .495 .515 112-LSA
New double roller chain
New Speed Pro 10cc dome pistons
New piston rings that I filed to fit. All bores were in really great shape. I just honed them all and tightened up the ring gap a little.
I did clean up all the ports and did some bowl blending to get as much as I can out of the peanut heads.
I put an adjustable fuel regulator on the TBI to adjust the fuel pressure.
Everything else is pretty much stock.
1995 K2500 Suburban
Gen V 454 (TBI)
4.56 Gears
35" Tires
4l80E Trans