[greg_moreira]

I know for a small block 1 and 6 both hit top dead center at the same time, and obviously the firing order is the same...so I figure there shouldnt be any difference. But just wanted to confirm, Is a big chevy at "true" TDC for both pistons at the same time?

In case you're wondering...I want to verify my TDC with a piston stop and degree wheel and then timing tape my balancer. I dont want to chance bending a valve with a piston stop, so I'll loosen the rockers on the cylinder Im checking.

Id prefer not to have to yank the brake booster to get the driver side valve cover off and do this....so figured Id find TDC for number 6...then just transpose that to #1.

Thanks folks.

 

[bracketchev1221]

Yes it is.

 

[greg_moreira]

perfect, thank you!

 

[Mike]

You can also time off #6 if you care to.
Sometimes there's 'stuff' in the way and #6 is usually uncluttered.

 

[greg_moreira]

yeah that would be more convenient if I moved the pointer over to the pass side and read it from there. as of now...its all easier to see on the driver side, and I dont wanna have the lead running over the motor(so that I can see the timing marks on the driver side) and risk getting caught in the fan or something.

Luckily I have enough room on either side its no biggie. just that brake booster in the way of getting the VC off. One of the big reasons Im going hydraulic roller instead of solid. I had to be realistic with myself and consider the fact that I do indeed drive the car a ton, and I would at the very least check lash with oil changes....yet I do not want to pull that booster every time! So the best solution that I wont have to keep after as often was good lifters and rockers and go hydro roller.

 

[aukai]

Greg do you have the full size booster? There are smaller diameter boosters, unless you are going for the original look.

 

[greg_moreira]

Have you tried the small boosters? I had considered it at one point, but didnt find a ton of good reviews on brake pedal feel after going down in size. Id need a pretty significant difference too. If I didnt have solid motor mounts...the VC would hit under engine load. I probably have 2 millimeters of clearance as is! It might have just been cheaper boosters folks were trying, but I dont know.

Im definitely not looking for originality in any way here. Its actually a 66 buick that I've put the BBC in, so yeah....originality matters not.

 

[Schurkey]

1 8 4 3
6 5 7 2

(1 and 6), (8 and 5), (4 and 7), (3 and 2) are companion cylinders, therefore they are at TDC (one on compression, on on exhaust) at the same time.

 

[BillyGman]

Have you tried the small boosters? I had considered it at one point, but didnt find a ton of good reviews on brake pedal feel after going down in size. .

I'm surprised to hear of bad reviews on those smaller diameter boosters. I cannot say that I've ever tried using them, however I don't think that they're really any smaller as far as their overall area, because although they have a smaller diameter (7" and 8" as far as I know) they also are thicker and stick out further forward from the firewall. So I thought that they actually have the same capacity as the stock type 11" diameter boosters do since they aren't as thin and flat as those are.

 

[aukai]

I am using MP Master Power brakes 8" and an electric vacuum pump and have no issues with mine. Hydro boost is another option. The picture is of my 8".

 

[66360horse]

You should be able to bring 6 up on the exhaust stroke and that would be 1 on the compression stroke if you can't get the drivers side vc off