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Heads/cam expectations

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Old 07-06-2020, 02:05 PM
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ImpliedConsent
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Default Heads/cam expectations

* 2016 Corvette Z51; stock exhaust manifold; stock primary cats; 3" cat-back; Vararam intake - tuned at 425rwhp (Dynocom), 6100'

So, the above is prior to my purchase/install of TSP PRC heads/TSP cam (32%) package. Had the shop install and dyno tune again, this time 445rwhp, 6100'. So, I have a couple of questions:

1: is that a reasonable rwhp number? TSP thinks its low, especially when just the cam alone does 596hp (est 489rwhp).
2: I know how to check the heads (TY TSP); how do I check if I have the right cam? I don't have much of a "cammed" lope sound... kinda sounds the same, but louder for sure.

My car is getting it's cruise control fixed (bad brake switch), so I can't just do a visual of the heads to verify yet. I just feel something isn't quite right. Tips and tricks? TY'all.

Old 07-07-2020, 12:13 AM
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tblu92
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TSP claims with their HDS and CAM kit you can get an easy 100 HP gains
However this requires a cam set up that deletes the AFM and the VVT systems
Otherwise the cam selections are very minimal --like maybe 35 HP
Is your cam AFM/VVT deleted cam ?????

PS if it is it is a MUST also have it tuned properly to accommodate those deletions
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Old 07-07-2020, 10:55 AM
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Originally Posted by tblu92
TSP claims with their HDS and CAM kit you can get an easy 100 HP gains
However this requires a cam set up that deletes the AFM and the VVT systems
Otherwise the cam selections are very minimal --like maybe 35 HP
Is your cam AFM/VVT deleted cam ?????

PS if it is it is a MUST also have it tuned properly to accommodate those deletions
My cam card (attached). The AFM and VVT have been deleted according to my shop. I wasn't able to attend the dyno-tune. Heck, I got more performance gain from just a tuned intake and exhaust than I did with tuned heads/cam.


Old 07-09-2020, 04:31 PM
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Jaycajun
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That seems low but you are at a high elevation which is gonna reduce performance significantly...
Old 07-11-2020, 12:38 AM
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A set of long tubes and an x pipe will wake her up
Old 07-16-2020, 11:18 PM
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Nabush
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Originally Posted by ImpliedConsent
* 2016 Corvette Z51; stock exhaust manifold; stock primary cats; 3" cat-back; Vararam intake - tuned at 425rwhp (Dynocom), 6100'

So, the above is prior to my purchase/install of TSP PRC heads/TSP cam (32%) package. Had the shop install and dyno tune again, this time 445rwhp, 6100'. So, I have a couple of questions:

1: is that a reasonable rwhp number? TSP thinks its low, especially when just the cam alone does 596hp (est 489rwhp).
2: I know how to check the heads (TY TSP); how do I check if I have the right cam? I don't have much of a "cammed" lope sound... kinda sounds the same, but louder for sure.

My car is getting it's cruise control fixed (bad brake switch), so I can't just do a visual of the heads to verify yet. I just feel something isn't quite right. Tips and tricks? TY'all.

Depends... Is the RWHP corrected or uncorrected for your altitude ? 445RWHP uncorrected at 6100' would be absolutely great.

445RWHP with SAE correction (so weather/altitude correction) is very weak. With a TSP Stage 1 cam and heads you should be around 490-500WHP

Seeing your first score at 425RWHP at 6100" with your mods I'm 100% positive it is SAE corrected for your Altitude, no way otherwise

You have the power curve ?

Last edited by Nabush; 07-16-2020 at 11:19 PM.
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Old 07-17-2020, 10:54 AM
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Originally Posted by Nabush
Depends... Is the RWHP corrected or uncorrected for your altitude ? 445RWHP uncorrected at 6100' would be absolutely great.
445RWHP with SAE correction (so weather/altitude correction) is very weak. With a TSP Stage 1 cam and heads you should be around 490-500WHP. Seeing your first score at 425RWHP at 6100" with your mods I'm 100% positive it is SAE corrected for your Altitude, no way otherwise.You have the power curve ?
For some reason I can't find my original at 425rwhp. Regardless, this is the latest from last month. I have no idea if this is corrected or uncorrected (but I'll ask). I also suspected some foul play, but no, I'm comfortable that all is installed correctly (had to pull valve covers to verify the PRC heads). ...but, if this is corrected then something is wrong. The shop insists that if I did headers, it'd open up to close to the 500+whp range. My build plan includes twin-turbos - so headers seem like a waste of money. I do have a full (primary cat) cat-back 3" custom-built exhaust.




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