Dyno... Marine trim VS Dyno (race) trim

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09-20-2016 | 03:27 PM

#21

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Joined: Nov 2004

Posts: 14,163

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From: On A Dirt Floor

Quote:

Originally Posted by 33outlawsst

Did the 15hp come between 5400 & 5800 or before............540 hp thats the best number I've seen out of that plenum

I believe Jwurl was also up there..600+ ?..maybe past it. Tbody on top of plenum mod. You'll have to do a search under his name.

Edit in: I do remember him selling it a few years later and I was surprised it took so long for someone to buy it.

Last edited by SB; 09-20-2016 at 03:43 PM.

09-20-2016 | 03:29 PM

#22

bobl

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Joined: Oct 2000

Posts: 1,382

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From: Spicewood, Texas USA

I've seen the same thing comparing tube headers to performance manifolds. Significantly more torque with the headers even though peak hp was about the same.

Quote:

Originally Posted by MILD THUNDER

Good info bobl

Anyone remember when installing a set of long tube headers on a gas 454 tow rig engine, substantially increased torque for towing ?