Holley Hi-Rise vs Mid-Rise dyno results
Jan 6, 2014 | 11:53 AM
#1
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Holley Hi-Rise vs Mid-Rise dyno results
I found this article on holley's website. it basically compares the Hi-Rise to the Mid-rise on the same motor...
Holley Intakes - Taking LS Intakes To New Heights - Super Chevy Magazine
results
Holley Intakes - Taking LS Intakes To New Heights - Super Chevy Magazine
results
Not surprisingly, the Hi-Ram intake offered more power and torque, with peak numbers of 563 hp and 505 lb-ft of torque. Extra top-end power is always welcome, but what about having to fit it underhood? That is where the mid-rise comes in. In terms of power, the mid-rise was no slouch, offering 543 hp and 499 lb-ft of torque. A review of the graph illustrates that the mid-rise actually offered more power than the Hi-Ram up to 4,800 rpm, and kept pace with its big brother up to 5,900 rpm. Only after 6,000 rpm did the high-Ram pull away, but there is no denying the extra 20 hp offered by the tunnel ram design. Loyal readers will remember we tested the mid-rise previously in carbureted trim back in Modern Mouse, part 5. Regardless of what system you pick, you'll be proud to pop the hood and strut your stuff.
Read more: Holley Intakes - Taking LS Intakes To New Heights - Super Chevy Magazine
Read more: Holley Intakes - Taking LS Intakes To New Heights - Super Chevy Magazine
Jan 6, 2014 | 12:15 PM
#3
Beyond 6k. Below 4800 the mid makes more hp and tq. This was with a 383, so if you have a smaller engine the mid rise should prove to be even more beneficial. On 400 + CI engines I think the high rise would be the bet. Thats just my .02
Jan 6, 2014 | 12:33 PM
#4
I agree with this. Below 4500 there is a clear winner, and above 6k there is a clear winner. Toss that in a 364 and those RPM ranges are gonna move slightly to the right. If you spin high RPM in something larher than a 6 liter than its a no brainer... for everyone else its not so cut and dry.
I will say in quickly looking at the pics I am a little surprised. Whats different about the mid rise? To me it just looks like shorter runners. so I would have expected an opposite end result.
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Jan 6, 2014 | 05:46 PM
#8
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Yeah so this is gonna be my next mod. Mainly for the cool looking factor. I just wonder what the results would be with boost. My truck makes good boost in low rpms so i am kinda thinking about the mid rise.