643whp/606wtq: Greg Good Heads/Cam with A&C Tune

345s-bspinnin

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Hey 345, you plan on runnin the 1/4 anytime soon? if so keep us posted.

No 1/4 miles times anytime soon. I know I will be in the 10s, so I will need a private rental to run (I have no roll cage). Most track private rentals dwindle during this time of year since its already pretty hot here in south/east TX. It will probably wait until the fall before I visit the strip.
 

copperhead007

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I dont know jack **** about engines but its conservation of mass anyway you cut it and presuming the goal of an efficient head is to minimize fluid flow losses due to friction, heat, pressure loss and geometry by packing the combustion chamber in a method best suited to the combustion process there exists an ideal balance for flow volume & flow velocity which can in fact be plotted. So maybe more flow volume is not directly proportional to hp and can in fact be less? who knows.
 
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copperhead007

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On my completed motor setup when I chassis dynoed, one dyno at one shop was just not enough. Although it looked real good i wasnt ultimately convinced exactly what i had even though i had **** stock data from that dyno. Since ive been on 2 different Dynojets, 1 Dyno dynamcis and 1 Dyna Pak. I forget the exact chassis dyno model numbers. Across these dynos there was a high variance for SAE corrected data for rwhp and which was appr 10%. So where did i really end up? It felt better when the dyno day hapened with many differnt machines yet the same machines, vipers i mean, on the same day. it took couple years to do that. In your case the mph is a good backup of your dyno.
 
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So maybe more flow volume is not directly proportional to hp and can in fact be less?

Assuming the quality of the air/fuel mixture remains constant, more mass makes more power. It's when a head porter does something to an intake port that increases flow on a flow bench but causes air/fuel separation on the running engine that we see less power from more airflow. An engine like that will move a lot of air and fuel, but won't convert it to btu's of heat in the cylinder on the power ****** like we want.
 
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345s-bspinnin

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Thanks for the compliments on the build Tony.

The ACR-X specific catch can is a modification of their 08-0410 found here. These can also be found on Amazon. For some odd reason, their factory fittings differ in size. The ACR-X version is the same can, but shorter and has two -10 male fittings angled at 45º, instead of 90º. I called them up and had mine made with two -12 male fittings, angled 90º apart. A better positioned fittings maybe better fitted to your SC setup. I think I ended up paying about $140 shipped for my custom breather can (2-3 week wait).

As for the PCV system, my '03 SRT had the rear ports. I removed the OEM CCV fittings, tapped the valve cover, then plugged it up (flush mount allen bolt). I then had the whole valve powdercoated, including the plugs. As for the valve cover ports, Todd from A&C Performance sourced me some Exotic Engine style breathers ports.
 

345s-bspinnin

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Tony, I realize that my explanation for plugging the CCV could have been cryptic. Here are some pictures that are worth 1,000 words. If I had to do it again, I would have introduced the bolts from the inside, locked them down (JBweld on thread, etc.), then just shave down the exposed side for smooth clean finish. O well, maybe next time.



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adamls2

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Love this build. Everything about it is winning!! Especially the video!! Great job!!
 

challenger&viper

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Is it possible for you to add nitrous system to you car ? Last say 75 - 125 shoot ? Would you like to do that or you think that is gonna hurt the engine as it sets now ?

Great build. Thanks for sharing :)
 

345s-bspinnin

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Is it possible for you to add nitrous system to you car ? Last say 75 - 125 shoot ? Would you like to do that or you think that is gonna hurt the engine as it sets now ?

Great build. Thanks for sharing :)

I am already pushing the envelope with respect to the strength of our cast pistons. The engine was qualified for 505 horsepower (flywheel) and I am pushing 750+ horsepower (flywheel). While the valve train system has been updating, I know I am eating into a lot of the design margin. No tuner would advise on nitrous on top of my setup. Now, if my engine was fully built, I big nitrous shot would be welcomed.

Another question is : is there a way to increase the rpm range to 7000 rpm ?

Yes. There are ways to increase the rpm range to 7000rpm, but no sane person would ever attempt on a stock shortblock. There are major hurdles to overcome, namely the oiling system. Any of our supporting vendors could advise you on how to proceed should you seek that route.
 

Viper Grenade

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There are ways to increase the rpm range to 7000rpm, but no sane person would ever attempt on a stock shortblock. There are major hurdles to overcome, namely the oiling system. Any of our supporting vendors could advise you on how to proceed should you seek that route.


That would be a Daily Engineering Dry Sump system. Takes care of the oiling issues. The billet oil pan is a work of art.
 

challenger&viper

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I am already pushing the envelope with respect to the strength of our cast pistons. The engine was qualified for 505 horsepower (flywheel) and I am pushing 750+ horsepower (flywheel). While the valve train system has been updating, I know I am eating into a lot of the design margin. No tuner would advise on nitrous on top of my setup. Now, if my engine was fully built, I big nitrous shot would be welcomed.



Yes. There are ways to increase the rpm range to 7000rpm, but no sane person would ever attempt on a stock shortblock. There are major hurdles to overcome, namely the oiling system. Any of our supporting vendors could advise you on how to proceed should you seek that route.


Sorry for this dumb question, but, who offers built engine packages for gen3? .

Also, Is there any good thread that discuses ( nitrous + built engine for gen 3 ) ?. I would like to read more about that.
 

Viper Specialty

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PaulP

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345s, you still running stock (cream puffs) pistons ? i just love this build i have gregg lined up for fall
 

345s-bspinnin

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345s, you still running stock (cream puffs) pistons ? i just love this build i have gregg lined up for fall

Yes, still have OEM shortblock. There are SC Vipers at about 700whp that have survived for 20k miles, and SCs utilize an any additional 30-40hp to spin. My 640whp probably doesn't impose any more more strain than a 600whp SC Viper. I have had zero engine issues. I do have an A/F gauge and check plugs for detonation whenever I am out at the playground (racing events). Since the build, I have done 1/4 mi., 1/2mi., 1 mile events in addition to handful of HPD events, weekend long rallies, and of course the inevitable runs in Mexico.
 

PaulP

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Just unreal how much you drive this car and put it threw the tests great build, are you running aluminum flywheel?
 

345s-bspinnin

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Just unreal how much you drive this car and put it threw the tests great build, are you running aluminum flywheel?

Nope. The car does buck a little at low speed. I think that an aluminium flywheel would make a bit more difficult to drive on low rpm. But besides the heads/cam/exhaust, pretty much everything else about the powertrain is stock. I haven't touched the clutch, transmission, injectors, or rear end.
 
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