Quote:
Originally Posted by KingLT1
Not all parts are created equal. You are not using Pray's heads, cam, or MSD. Pray routinely backs those numbers up with that combination of parts.
For starters the cam specs look odd for NA. Looks like a blower grind. Also you need a Ported 95mm tb minimum. I would also ditch the K&N for a Rotofab. If you want to make Pray power then use Pray's combination of parts.
There are some other variables too.
A8 vs M6. A8 shows 20whp difference between 5th and 6th gear pulls. M6 dynos 10 whp higher or so over a A8 in 6th.
Drag radials dyno lower then street tires.
Tuner...just because you had it tuned twice doesn't mean much unless it was tuned by one of the few competent Gen 5 LTx tuners across the country.
And likely one of the biggest factors...Different dynos. All dynos read different even with SAE correction. I wouldn't expect to see a 75whp difference on 2 different dyno jets between the same combination but I could see there being a 20whp difference easily.
All that being said if you addressed some of these things above, I wouldn't be surprised if your combination hits at least 550whp.
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Thanks, good info. And you're right it is a blower grind. My initial conference with the builder I stated I wanted to procharge it eventually. They said this cam would work OK for NA but even better for boost. Your post gives me a lot of items to target to get the most out of what I have though so it's appreciated! The K&N is up for sale locally now. I'll save for the larger TB but I am saving for wheels and tires for the strip right now.