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After years of watch videos of engines like Vortec Pro does on the dyno I had my own turn. Spent the day seeing how my 466 cid dart block did. Here are all the engine details.
Dart big M block bored to 4.310
Eagle 4” crank
Scat Pro I beam rods.
AFR 265 heads with Cnc chambers
Wisco pro tru dome pistons
Straub 229 cam, morel lifters, Straub rockers
edelbrock RPM air gap ported by Tony Mamo
AED 950 carb.
Amazing - your HP./TQ figures are almost identical to my 489 cu in - mine was 571 hp at 5850 rpm and 606 ft/lbs at 3850 rpm. 950 dp on Performer Air Gap with Brodix RR ovals and 236/242 hyd flat tappet cam.
Dang that's nice!
You have 85 HP on my LS6 clone. Your AFR heads, ported RPM and 950 are the difference vs my stock pancake intake, old school OEM L88 heads, and factory 780.
Our cams are even almost identical.
You are gonna like that!
tires with the tread worn off are easier to replace than rear end gears with the teeth worn off... and gary's wait time is longer that the local tire guy...
But I gotta ask.......why keep a small bore with a killer block??? A LOT left in there!! The odds of wearing that block out in a couple of lifetimes is about nil.
Mine is 21 years old and hasn't worn a bit....and it gets LOTS of hammering.
Quite a difference in A/F mixtures from RIGHT to LEFT, according to the data shown. Did the shop offer any discussion on that or suggest adjustments? Reruns?
Thanks for all the good replies. I am very happy wiith it.
Originally Posted by leigh1322
Dang that's nice!
You have 85 HP on my LS6 clone. Your AFR heads, ported RPM and 950 are the difference vs my stock pancake intake, old school OEM L88 heads, and factory 780.
Our cams are even almost identical.
You are gonna like that!
Nice! I remember reading about your results. It is always so hard gauging what it will do from what others have done.
Originally Posted by 427Hotrod
That's going to be fun!!
But I gotta ask.......why keep a small bore with a killer block??? A LOT left in there!! The odds of wearing that block out in a couple of lifetimes is about nil.
Mine is 21 years old and hasn't worn a bit....and it gets LOTS of hammering.
JIM
Well, I build the engine in 2018 and then had surgery. I finally got it hooked up and started in 2019. In 2020 though cylinder 7 started filling with water due to failed threads in the block. I didn't want to replace everything I had bought previously and with only two quick start ups on that engine I swapped everything over. The Dart block was my choice instead of helicoiling more head bolt threads or risking another stock block.
Originally Posted by 7T1vette
Quite a difference in A/F mixtures from RIGHT to LEFT, according to the data shown. Did the shop offer any discussion on that or suggest adjustments? Reruns?
The dyno header has a weld crack in the collector on that side.
Here is a little comparison stock 454 gm block AFR 325 heads stroked 496 pump gas. Mine is more of a RPM motor you got me big time down low. I think you would get me stop light to stop light
Here is a little comparison stock 454 gm block AFR 325 heads stroked 496 pump gas. Mine is more of a RPM motor you got me big time down low. I think you would get me stop light to stop light
That looks like a very good engine. Are you racing it?
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Finally got some dyno time BBC 466.
