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Looking for Dyno results. Holley efi intake on ls3 heads

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Old 03-13-2014, 10:23 AM
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Default Looking for Dyno results. Holley efi intake on ls3 heads

Searching all over. Found a car craft engine Dyno thing online, that's it. Looking for a chassis Dyno difference between a fast/stock intake over the Holley efi. Looking to do one on my 416
Old 03-14-2014, 10:32 AM
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On my 430, the hi-ram was worth 30hp over 6000rpm vs the fast, but gave up 50+ ft/lbs below 5k.

TQ peak shifted up 1400rpms, hp peak shifted up 600 rpms.
Old 03-14-2014, 12:15 PM
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Originally Posted by DietCoke
On my 430, the hi-ram was worth 30hp over 6000rpm vs the fast, but gave up 50+ ft/lbs below 5k.

TQ peak shifted up 1400rpms, hp peak shifted up 600 rpms.
Wow...never expected to hear of a tq loss. Or a huge one like that
Old 03-14-2014, 02:42 PM
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Oh, you thought a high rise was good for TQ production? lol.

This was just the intake swap. Got some TQ back with a cam swap, but you need a nasty cam to get there... mine's a 109 installed on a 105icl. 46.5 degrees of overlap

It's a good change, but you have to be willing to spin big rpms, have a huge torque converter, and run a nasty cam to really make the intake work n/a.
Old 03-14-2014, 02:52 PM
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Interesting. I will be running a crate lsx454 (620hp) version. with a fast 102 and then the holley high ram with twin 750 cfm carbs on it. Our situation lets us run the engine at 6000 rpm so it should be interesting what will make more power. I am guessing the tunnel ram by 30-40.
Old 03-14-2014, 04:31 PM
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using carbs is different then using FI. the two arent even comparable. I dont think the hi-ram will win by much at 6k though. 7k for sure



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