Has a similar torque profile. Why are the lines so jagged?

 

Still trying to figure that out, but you get the just of it. Thought the opti was acting up, replaced it, didn't get a chance to see if it fixed it before the fuel pump quit too. Replacing pump now. This torque curve was completely different than my last motor. It is a lot broader with these heads, cam, and LPP headers, whereas my last motor was very similiar, but with an XE cam, stock ported heads, and Pacesetter headers, it spiked quickly and fell off quickly.

 

Here is a run in speed density mode WITHOUT the elbow & CAI. The torque curve filled in better (except for the funky spike) which made the HP look better too.


Maybe I need a 58mm TB?

 

Congrats on the numbers! But I thought you made 412 RWHP a few months back on that setup.

 

Did on a Superflow dyno corrected to STD. Got the sheet to prove it.



That dyno is local and I only use it for measuring and has a rep for reading high as I have recently learned. The other funny thing is that dyno reads lower torque than the one I tune on.

The dyno that is used to tune is a DynoJet and is a hundred miles away. New SAE numbers are in my sig. I trust this dyno and the tuner far more than the local Superflow.

Clearly that Superflow dyno must be "happy" high because 383RWHP SAE on the DynoJet is far more realistic for my setup. The SAE numbers on the DynoJet were 393RWHP 371RWTQ BTW.

Another case of two dynos being worlds apart.

 

Oh I was not knocking it by any means. I was just curious. Those new numbers do make sense with the 9 inch in the rear

BTW, ordered my new AC Delco Opti this weekend. Hopefully I had the same problem you did with yours when you first go it back together & I will be up & running in my LE2 Z soon!

 

No knock taken.
I explained the same thing over on tech when I was asked the same thing. Many have told me that if I still had the 10 bolt the numbers would be about 13 points higher. That said its where it ought to be with a small cam but once I fix this intake restriction I should be able to squeeze a bit more out of it.

Your new (un-tampered with) opti should fix your problem.

 

Valve float.

 

Yeah he got it fixed though. We both, at the time, had the exact same cam. We both ended up installing Patriot golds and the float was gone.

 

Oh! Funny... a buddy of mine just had valve float with Patriot Golds and swapped to PAC 1518s and solved it! They did have a few miles on them, though.

 

The Patriots your buddy had must have been plum wore out because they are a good bit stronger than the 1518's on the seat pressure. I am running ~35# more on the seat with the Pat's compared to the 1218's which are essentially the same as the 1518's but not quite as durable.

 

Just a couple thousand miles.