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Comments on new mtor combo please...

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Old Feb 16, 2005 | 04:13 PM
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Parts are now stating to arrive for the new motor. Can I get some feedback from you guys on this one. Keep in mind this is a ORR car NOT a drag car. High RPM's and longevity are key.

346 c.i. LS1
13.99:1 compression
CAM:243/256 572/572 110+0 lsa
Compstar 6.125 rods
Diomand 3.903 10cc domed pistons w/ total seal rings(coated)
Stock nitrated crank
MTI Stage 2R LS6 heads (same heads off old motor)
LSX 90m throttle body and intake manifold
QTP 1 3/4 stepped to 1 7/8 long tube headers w/ high velocity merge collectors out a Dr. Gas boom tube.

Good possibility this motor will get a dry sump thrown on it. Conservative guess on hp......I am going REAL conservative w/ 430rwhp and spinning around 7500. I dont want to get my hopes up to much and then get kicked in the nuts when Igo to the dyno.

Whadya think?
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Old Feb 16, 2005 | 04:17 PM
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whats your DCR and is that a FTI grind? what valvetrain as well?
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Old Feb 16, 2005 | 04:19 PM
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i only have a question, why the 13.99:1 compression?
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Old Feb 16, 2005 | 04:22 PM
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Holy crap man! That's going to be a pretty wicked 346. The only thing I'm wondering about is if that cam will peak too soon to be really effective at 7500rpm.
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Old Feb 16, 2005 | 04:22 PM
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Originally Posted by jrp
whats your DCR and is that a FTI grind? what valvetrain as well?
More than likely its going to have jesel stuff on it. I could get away with running stockers with this cam but dont trust them on the extended RPM runs.
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Old Feb 16, 2005 | 04:23 PM
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Originally Posted by gomer
Holy crap man! That's going to be a pretty wicked 346. The only thing I'm wondering about is if that cam will peak too soon to be really effective at 7500rpm.
It "should" peak right around 6 grand. I wont be shifting until the 7-7500 range. Cruising RPM will be 6-7000 rpm
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Old Feb 16, 2005 | 04:26 PM
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Originally Posted by jrp
whats your DCR and is that a FTI grind?
dynamic is right around 10.5 maybe a tad higher. It is a grand am cup cam if that helps anything. Asymetrical lobes on this one.
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Old Feb 16, 2005 | 04:30 PM
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is that the one you and louis were talking about? how much are your heads milled?
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Old Feb 16, 2005 | 04:34 PM
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yeah, thats the cam.

Heads are milled .030, 58cc chamber
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Old Feb 16, 2005 | 04:49 PM
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is that what they cc'd out? i come up with 60cc. what gasket thickness are you using?
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Old Feb 16, 2005 | 04:53 PM
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Yeah thats what they cc'ed out as. tested with my own burret kit. Factory GM gasket. CR is going to be closer to 13.7. I forgot that the 13.99 was with the Lunati 12cc domed pistons.
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Old Feb 16, 2005 | 04:58 PM
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gotcha. should be a ****** bad *** setup. i assume 116 race gas? is this the setup you were originally gonna go with and then had to back down because of funds or something?
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Old Feb 16, 2005 | 05:27 PM
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This is the "budget" combo. So far I have been able to dig parts up pretty damn cheap. Not quite what I wanted. It will still be a race gas only motor though.

The next combo will be the one I go for 200mph with. This one just has to keep me moving at 180mph.
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