526 blown chevy

i have a 526 blown chevy with 14 olds heads and donavan 500 block 11.5 comp with 14-71 hh retro was wonder i plan on shifting this motor at 7500 and was wonder how often should we check the bearing we are running 20 over at this time but motor will not run any higher the 8000 max thanks for all who has answer and we are running 1/8 mile

 

If you are trying new combos on the engine, then I do it after a day of testing, unless I am getting aggressive with timing then after 1 run. If I know my combo is safe I check it after the racing weekend. Just curious but what is your bore stroke combo and timing. If you are only spinning that motor to 7500 in the 1/8 you really shouldn't need to check often after you get you combo established, unless you are running 40+ degrees of timing. I run a 496 BBC 30lbs of boost. Shift at 8,000

 

mmy bore is 4.560 with 4.0 stroke with 32 timing this motor has been run in pro mod car just the way i got it but i will need to detune it to make it work in my car and the owner i got it from said he could go 20 or more run with no problem but i wanted to ask before i asume anything but wanted my combo to last

 

With that timing it looks like it should be low maint on bearings.

 

thanks for your help

 

When I see 14° heads, my first thought is timing in the mid to high 20's.

The 14° NA stuff I help with doesn't run 32° advance and it doesn't have a blower on it. My blown motors, the heads are conventional, run in that low to mid 30 range.

A big key to how long the brgs last is the fuel tuneup.

 

so you are sayign motor with 14 degree heads with blower dont like 32 timing and should be high 20's or so i thought that depends on the amout of overdrive and and how good the strips are in the blower

 

I don't have experience with 14° heads with a blower above it, but if it were mine I would start with 25-26° ignition timing.

 

We were told to run 26-28 on our 14 degree Olds. We'll be on the Dyno soon so we will find out for sure.

I'd say if you run 32 you'd better be pulling the pan when you get home. And checking the top rod bearing.

What type oil filter are you using?

 

Real effiecent head, but most I know run them in the low to mid 30's.. If your just starting out, I say run it around 24* and go up 2 at a time till your ground strap looks good. But chase the tune with it as you raise the timing if you dont have a baseline to start.