Running a high compression engine on pump gas

[Hemicolt]

Have the valve seats been changed to hardened versions?

[elonblock]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hemicolt</div><div class="ubbcode-body">Have the valve seats been changed to hardened versions? </div></div>

The seats have not been replaced yet.

[Hemicolt]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: elonblock</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hemicolt</div><div class="ubbcode-body">Have the valve seats been changed to hardened versions? </div></div>

The seats have not been replaced yet. </div></div>


The reason I asked about the seats is because based on your first post, I wasn't sure if it was a used engine or not.
If I missed that point, sorry for my oversight.

If it is used, and you do know for a fact that the seats havn't been replaced with hardened pieces, then there is an unknown, (concerning valve seat condition), that may need to be figured into your decision.
If that is the case, I probably wouldn't take a chance on not running some type of lead additive. This way you will not give any possible problem a chance to become bigger.

If it's a stock type rebuild that you are doing or have done with no miles, then this is a moot point. But I believe it's well worth mentioning.

Kudos for the point being made again about camshaft specs affecting cyl. pressure bleed off. Another point that was worth mentioning again, it's not always about the dist. mechanics.