Will the CEL come on for any reason if the engine has a ported head , Toda CAMS/TI retainers/SS valves?

 

Not if you put it together correctly.

 

Sideways, I currently have an extra head at Joe Alaniz's shop getting the Competition porting and oversize valves. He has me slotted in for early April for the work. I'm thinking of going with a double gasket when I do the install to get the compression ratio down a bit. Has anyone tried this? Any thoughts or comments?

 

I think if you ask Sideways he actually dropped the C/R without putting 2 head gaskets. From what Joe Told me, you can lower the ratio by getting deep dish valves. I went the other route and went with flat top valves to raise the C/R because I'm going all motor.

 

I saw his post on the subject, but I would like to get the CR down to about 9.5/1.

 

You might PM marcucci about this. When he had my head off, he noticed that the gasket is several "sheets" stuck together. It might be possible to customize a gasket by simply sticking a few extra sheets in there. IIRC, he still has my original head gasket, so he might be willing to experiment with it for you... or at least tell you if it's possible.

Also, part of the reason Sideways' CR dropped was because of the material that was removed when the work was done. He (or Joe) should be able to give you the exact CR that resulted. Looking at the numbers that resulted from my "mild" P&P job, I doubt that the material that Joe will remove will lower your CR much below 10.5:1. However, with deep-dish valves, you might be able to get down around 10:1.

 

I know nothing of the merits of the larger gasker or much the gasket will change the CR.

Referring to the head, I doubt you can get the CR much lower than mine ended up without incurring liabilities from changing the combustion chamber shape/size.

As the wise one once said, "you really need to change the pistons and if you do that you might as well increase the bore a couple of millimeters." Two silly millimeters ends up being about 90cc or almost 5%. New pistons with stronger rods would be real nice and allow you to go oversized with the exact CR you want.

 

My thread got highjacked....but who cares....more knowledge.

 

[QUOTE]Originally posted by allenheathdj
I think if you ask Sideways he actually dropped the C/R without putting 2 head gaskets.

 

He's not getting "larger" valves is he? Just flat top valves. But you're right, clearance can become a problem with the high-lift cams. He'll want to be sure that Joe is aware of this. He'll want to be careful about any material that he mills off the head, and you'll also want to be particular about your choice of head gasket. You won't want to go much thinner. JDM should be OK, but it's my understanding that the Spoon gasket will be too thin (unless maybe you are also going with the Toda high compession pistons, which have larger reliefs for valve-to-piston clearance).