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PostPosted: Fri Oct 20, 2017 8:21 pm 
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Joined: Tue Nov 06, 2012 10:23 am
Posts: 934
Location: Texas
Daum, you took it on up there. So how long do you think it will live seeing 8000 rpm all the time? Also, can you tell me what hp it made at 6300. Great job by the way
Matt


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PostPosted: Fri Oct 20, 2017 8:33 pm 
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Joined: Mon Oct 29, 2012 9:05 am
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As long as the valve spring pressures hold up, the engine would last a long time. With a standard volume/standard pressure pump, it still had 69 psi of oil pressure at 8000 rpm, measured at the rear of the block. It also has coated bearings. It's a solid piece.

At 6250 it had 545 hp, but was gaining very quickly. At 6500 it had 559.

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PostPosted: Fri Oct 20, 2017 8:37 pm 
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DragBoss wrote:
Wow, nice job Brent, good choice on cam. I forgot what I originally guessed, 585-620, cool beans. So I won good guess and experience.


So the schwag is a true Cleveland thermostat and some decals. :)

Shoot me your address in an email and I'll get it out to you. Good guessing.

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PostPosted: Sat Oct 21, 2017 8:30 am 
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Joined: Tue Oct 30, 2012 6:01 pm
Posts: 238
Location: Massachusetts
Wow I was way off @ 526. I didn't expect 1.737 HP / CI. Congrats Brent


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PostPosted: Sat Oct 21, 2017 9:18 am 
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Joined: Tue Nov 06, 2012 10:23 am
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Location: Texas
So Brent, Where did you start the pulls?
Question/thought:
Lest say your engine is designed to operate from 4000-8000rpm. I heard if you start to low say 2500 rpm and bring it to red line, it will produce less peek power cause its not starting in its optimal rpm range but if you start the pull at 4000 it will be in its optimal range and actually make more power. Have you ever seen this in your dyno days?


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PostPosted: Sat Oct 21, 2017 9:31 am 
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Pulls usually start a little under peak torque. No reason to start them earlier, and if you try to pull a 7000-8000 rpm engine down to 2500, you're gonna have some problems. I don't even start my 500 inch BBF street engine down that low, usually at around 3000-3500. There's no need in it and a lot of the time, you're loading the engine so hard at a low rpm that the dyno can't hold it, or you can put the engine into a dangerous situation. It's not going to change the horsepower if you start lower. A dyno just measures torque at any given rpm and calculates horsepower. The only way you're going to have an incomplete record is if you start the pull higher than the peak torque rpm.....and it's not going to be detrimental to anything except you're not catching it low enough to see the true peak torque.

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PostPosted: Sat Oct 21, 2017 9:33 am 
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If the engine doesn't generate any interest in the next several weeks, I'll probably keep it and port the heads/intake, then hit it again. :)

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PostPosted: Sat Oct 21, 2017 8:36 pm 
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Posts: 161
Gday Brent,
Well done! That thing is really asking to give it a run on methanol, pull a few degrees of timing out and a good 750 alcohol carb and good fuel delivery watch it pickup ☺
Cheers


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PostPosted: Sun Oct 22, 2017 6:31 am 
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I may give that a shot at a later point in time, Paul. It would be something cool to try. I will admit though, that it would be difficult for me to switch to a 4150 carb at this point because of how the engine looks with a Dominator....hahaha

This Dominator was actually a 1050 when it was new, but it's probably sitting at around 950 cfm right now with the modifications.

Image

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PostPosted: Sun Oct 22, 2017 9:11 am 
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Impressive numbers Brent, congratulations!


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