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170psi cranking pressure. Wow kinda lower than I thought it would be. I thought for sure it would be around 190- 200psi

What is a downfill? I don't know exactly how to do the math, but the inlaw, loves to do all the figuring.

Those are absolutely correct numbers. My father inlaw came up with 14+ as well.

I will check it tomorrow & let you know.

Dome piston +6.5 comes out of the hole at the flat .023" . .060" mls gasket. 4.310 bore 4.250 stroke 70cc heads

That was what my father inlaw came up with. I messed with the Wallace calculator a little this morning and it says my compression ratio is 13.2:1

18 initial 36 total

Wow nobody had ever told me that. What can happen if I were to keep using the 110?

Strictly track car. Now do they make an unleaded 110

so a friend and I were at the track this weekend and started a conversation about fuel. Currently he mixes 3 gallons 91 unleaded pump to 2 gallons 110 race leaded. I asked him why he does that he said the high compression. My question to you all is with the modern technology (hardened seats)...

Locking it out is still an option.

Well I messed with the timing a little today. Current starting point is18* initial all in 36*. I will play with it from there.

So if my initial timing is say 20*, i have an 18* stop in my distributor. How do I keep it from total 38*? I know everybody is different, every engine isn't the same. Everything I have read is 34-36* total. I must be missing something (not understanding). I completely know how to set total on...

This is what we had set it at. Yes 18* stop. This was all based on talking to other racers and their set ups. 38* was a starting point. I was told that the big blocks such as mine like a little more timing. Have not been able to get to the track to test yet. Just wanting a starting point.

You are correct. I have MSD AL-3. I normally run locked out. With this build I decided to check out playing with timing. Right now initial is at 20* total @38* The 20* seemed a little high to me. But from what I am reading lately with my cam and compression that is normal. I do have the...

Thank you.

LSA 110

So I am looking for some experienced thoughts a suggestions on initial timing and total timing. Wanting to set up timing curve. Here it is 383 stroked to 496. 383 .060 over (4.310 bore). 4.250 stroke. Trick flow max wedge 270 heads 70cc. 1.5 harland sharp rockers. Cam is custom grind. Cam lift...

] Thank you Andy F. I was hoping you would chime in.

To be clear I pretty much know what I am doing. This reverse cooling thing was just to try something new

On a big block with trick flow 270's where would that high point be?

Cudafever thank you for the suggestion. I believe this is very valuable and will give it a go.

I did it simply as a suggestion from a couple of experienced drag racer friends when I was building this. Figured it made sense so I will give it a shot

I thought that as well. But not sure how to check for that. When I manually pressurized the system I had the plugs out so I could hear any bubbling in cylinders. But it just held pressure.

I did reverse cooling as a suggestion from a couple of fellow old school drag racers. To cool heads first. I did research and the consensus was 50/50

I am asking this question mainly because I have my engine hooked up for reverse cooling. To get it all burped. I have jacked up the front end, left and right side. Did this twice. The motor stays cool with pump on, but for some reason will still puke water into catch can. I have an 19-21lb stant...

so what are your thoughts on reverse cooling? Big block 383/496 strictly race .

I am going to get some new hotter plugs. Keep you all posted. Thanks for all your help.

I was wrong. This is what in in the car now