Cam and valvetrain longevity....??? low duration high lift...

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09-21-2016, 09:27 PM

#341

Gimme Fuel

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Quote:

Originally Posted by Black Baja

Motor is still trying to go but can't. Usually means there is a restriction. When you do a pull and it drops of fast it means the motor is done.

Yes. This. Manifold vacuum readings at WOT would be real easy to confirm this.

09-21-2016, 09:28 PM

#342

Full Force

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posted pic... from dyno.

Quote:

Originally Posted by Gimme Fuel

Yes. This. Manifold vacuum readings at WOT would be real easy to confirm this.

09-21-2016, 09:30 PM

#343

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seems that way, I thought we discussed it, and I also thought it was .4 or something, I was told .5 is ok... not sure where to look for a restriction.. ports lined up good, WOT is present.. I could see arrestor maybe on the boast but not on dyno...

Quote:

Originally Posted by donzi matt

Am I reading that right? Almost 2" vacuum at WOT?

If so, you got a restriction up top.

09-21-2016, 09:33 PM

#344

donzi matt

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Quote:

Originally Posted by Full Force

Got a buddy with a pair of dominators you can try?

09-21-2016, 09:37 PM

#345

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I don't, not sure how I can fit them either under hatch ugh..

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Originally Posted by donzi matt

Got a buddy with a pair of dominators you can try?

09-21-2016, 09:39 PM

#346

donzi matt

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I was thinking just to see how the motor liked them. Just take the hatch off and let her eat.

09-21-2016, 09:39 PM

#347

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Dyno shows using 850 CFm, so I ruled out doms, figured at that point my 1050's were good hmm

09-21-2016, 09:39 PM

#348

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I can ask around and see ..

Quote:

Originally Posted by donzi matt

I was thinking just to see how the motor liked them. Just take the hatch off and let her eat.

09-21-2016, 09:42 PM

#349

donzi matt

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Quote:

Originally Posted by Full Force

I can ask around and see ..

No matter what is going on with the cams, 1.7" vacuum at WOT is NFG and holding you back. I'd start with bigger carbs and see how it responds if it was me before trying anything else.

09-21-2016, 09:50 PM

#350

Gimme Fuel

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Quote:

Originally Posted by Full Force

Dyno shows using 850 CFm, so I ruled out doms, figured at that point my 1050's were good hmm

That's not how many CFM the engine WANTS, that's just how much it was able to pull through the restriction. Bet you threw bigger carb/intake on you would use more cfm.

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