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Half pregnant build...Tony Mamo 265’s on a 434” RED sleeved block

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Old 07-14-2018, 09:30 AM
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Today was the day! Vengeance Racing...
The bad: woke up to the sound of pouring rain...sounds like the first lyric of an old song. Yep, it’s raining here today, and I’m OCD about cleanliness. The car is absolute show quality of course, and is/was a never-to-be-driven-in-the-rain type of deal. I’ve been trying to get a date with this tuner for quite a while now, so what do I do? He’s opening shop today (Saturday) just for me...oh well, it’s got wipers on the windshield, and it will wash. Let’s go! A 40ish minute drive in absolute pouring rain. Yay.

The good: we were able to get the majority of the work done on the dyno. I will get back over there maybe end of week, for street tuning, and tweaking. Overall I’m extremely pleased. Driveability is a lot better already, and will improve more as we street tune. Nothing broke! I had about 5 miles on the re-do, prior to leaving for the dyno this morning at 5am. Drove it just enough to seat the rings was all. Plugs look good. Oil looks good, with no fuel smell. Success!

How about some numbers...car made 616hp. This is a conversion vehicle. In a C6 chassis, that’s gonna be another 20+ easily, due to a much more refined and efficient driveline. Torque is 526.3, and a VERY flat curve. These numbers will go up a little as street tuning gets optimized. Mike was pretty amazed that I made this much with a plastic manifold. I would have been happy with 620, and it may get there still. Car is extremely strong. I’m gonna do some half mile runs, so there will be data available to compare to. Camshaft is actually pretty small (half pregnant) for a 434” build, and equates to a 246 degree hydraulic camshaft. I could go much bigger camshaft, and chase numbers, but it’s streetable and I’m happy.

I installed an improved oil cooler setup setup during the re-do. I went with their MHX-520 cooler, with -10 lines. I also installed their EGM-112 oil cooler thermostat, to ensure the oil gets up to temp (180 degrees), before the cooler sees oil circulation. It works great, and my oil temp gauge showed a tick over 180 the entire trip today.



Last edited by Che70velle; 07-14-2018 at 09:41 AM.
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Old 07-14-2018, 10:16 AM
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Darned impressive Scott! That thing's gotta be a total hoot to drive!
Old 07-14-2018, 10:44 AM
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Yes very good power. Your half pregnant cam is still bigger than my" I want power" cam 😂

Geoff seems pretty confident this is best choice so I'm going with it.
sounds like a very nice build all around.
Old 07-14-2018, 11:41 AM
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Congrats Scott!
Excellant Results!
Old 07-14-2018, 12:40 PM
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Very nice! I'll be really curious to see how mine compares when I can get it on a chassis dyno. I use a T56 also (a Magnum) but a Ford 9" instead of the 12-bolt. And you have a lighter clutch as well...
Old 07-14-2018, 01:13 PM
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Congrats. Any way to get the graph with HP/TQ #s (and RPMs ) listed ? I hate when people just show numbers without the X and Y axis or MPH instead of RPM. LOL.
thanks,
Jim
Old 07-14-2018, 06:53 PM
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Originally Posted by Jimbo1367
Congrats. Any way to get the graph with HP/TQ #s (and RPMs ) listed ? I hate when people just show numbers without the X and Y axis or MPH instead of RPM. LOL.
thanks,
Jim
I can do that...

Old 07-14-2018, 06:55 PM
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Originally Posted by G Atsma
Darned impressive Scott! That thing's gotta be a total hoot to drive!
Thanks G. It’s a fun car. I couldn’t be happier.
Old 07-14-2018, 07:01 PM
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Originally Posted by NAVYBLUE210
Congrats Scott!
Excellant Results!
Thanks boss! You know, if I were chasing numbers, I’d already be looking to see what and where I could spend another $5-$10k to get me there, but I’m not. Not saying I won’t upgrade stuff from time to time, but overall I’m pleased. It’s a cool old car that’s a little older than I am, and that’s what I like best about the project. I’m having a blast!
Old 07-14-2018, 07:04 PM
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Originally Posted by carbuff
Very nice! I'll be really curious to see how mine compares when I can get it on a chassis dyno. I use a T56 also (a Magnum) but a Ford 9" instead of the 12-bolt. And you have a lighter clutch as well...
Bryan I’ve been wondering how yours was coming along this summer. Get a dyno day scheduled, and get some numbers up. How does it drive/feel overall with the setup you have? It’s got to be a screamer up top...
Old 07-15-2018, 08:27 AM
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Scott,
Thank you Sir. 370 lb/ft@ 3K and 400 lb/ft @ 3200RPM. This thing comes on strong.
Old 07-15-2018, 11:08 AM
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Here’s the final dyno pull we did...
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Old 07-15-2018, 12:27 PM
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Originally Posted by Che70velle


Bryan I’ve been wondering how yours was coming along this summer. Get a dyno day scheduled, and get some numbers up. How does it drive/feel overall with the setup you have? It’s got to be a screamer up top...
Long story, but I had a setback on the suspension update that caused me to pull things back apart. I did most of this over the 4th, and it's all back together now except for the exhaust. I am looking for a local shop to do the modifications I need (had to move the engine back a bit), as my normal fab guy is too swamped. I hope to get that done in 2 weeks, I'm traveling all week this week. Just one thing after another.

During the short drives I've taken, it feels great, but I haven't gotten on it hard at all yet. I've been bedding brakes and working on idle/part throttle tuning.

Slowly moving forward, snails pace though.

I'm curious on your dyno runs, did you intentionally stop at 6800? I'd be really curious to see if yours continues to pull like mine does. I'm amazed how flat the curve was up into the mid-7000s on mine. I won't regularly spin it there I don't think, but it's amazing how it held on during the dyno pulls!

Congrats on this progress! And I'm sympathetic to the rain... I've been caught a few times. Mine isn't a show car per se, but it's not a lot of fun to drive in the rain with these old things! Big tires, lots of power, mediocre windshield wipers...
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Old 07-15-2018, 06:02 PM
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Nice numbers! I've been following your build because it is so close to mine. I was hoping for something over 600 rwhp and it looks like from your pull, I might get there.

I'm still a few weeks out for a chassis dyno. Need to get an exhaust installed first. Good job/attention to details...

What mufflers are your running?


Old 07-15-2018, 08:27 PM
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Originally Posted by lowcountry
Nice numbers! I've been following your build because it is so close to mine. I was hoping for something over 600 rwhp and it looks like from your pull, I might get there.

I'm still a few weeks out for a chassis dyno. Need to get an exhaust installed first. Good job/attention to details...

What mufflers are your running?
Thanks! I’m running Borla XS Pro’s. 2” primary ARH headers into 3” with X-pipe. Exhaust is dumped in front of axle.
I'm pretty confident that I will pick up power on the street tune. My wideband sensor was acting up, so we were hesitant to push the envelope. It’s a pretty mild tune right now. I’ll keep you guys posted.
Old 07-15-2018, 08:45 PM
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Originally Posted by carbuff
Long story, but I had a setback on the suspension update that caused me to pull things back apart. I did most of this over the 4th, and it's all back together now except for the exhaust. I am looking for a local shop to do the modifications I need (had to move the engine back a bit), as my normal fab guy is too swamped. I hope to get that done in 2 weeks, I'm traveling all week this week. Just one thing after another.

During the short drives I've taken, it feels great, but I haven't gotten on it hard at all yet. I've been bedding brakes and working on idle/part throttle tuning.

Slowly moving forward, snails pace though.

I'm curious on your dyno runs, did you intentionally stop at 6800? I'd be really curious to see if yours continues to pull like mine does. I'm amazed how flat the curve was up into the mid-7000s on mine. I won't regularly spin it there I don't think, but it's amazing how it held on during the dyno pulls!

Congrats on this progress! And I'm sympathetic to the rain... I've been caught a few times. Mine isn't a show car per se, but it's not a lot of fun to drive in the rain with these old things! Big tires, lots of power, mediocre windshield wipers...
Not real sure why Mike quit when he did. It had leveled out, so I guess he figured that was it. I would have loved to have seen it go to 7, just to see when it started to fall off. The plastic manifold is a limiting factor for sure, even ported.

Old 07-16-2018, 01:07 PM
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Healthy numbers from a very well thought out combo! That will be a fun car for sure!
Old 07-16-2018, 09:47 PM
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I picked up my ls3 427 from tony in march and it peaked at 7200 at westech. Made 680 fwhp
Old 06-05-2019, 09:50 AM
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How is this beast running?
Old 06-05-2019, 12:13 PM
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Yea man, lets get some vids of it breakn lose on the streets!


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