496 RB on the dyno

[andyf]

Just finished up dyno testing the 496 for my '65 Coronet. This is a factory 426W block with a 4.250 stroke, TF240 heads, a TF intake and a Comp hyd roller cam. It made 610 hp and 630 ft-lbs of torque. Nice smooth engine that will run just fine on pump gas. Should be out hitting the streets this summer.

 

[Hemirunner]

Just finished up dyno testing the 496 for my '65 Coronet. This is a factory 426W block with a 4.250 stroke, TF240 heads, a TF intake and a Comp hyd roller cam. It made 610 hp and 630 ft-lbs of torque. Nice smooth engine that will run just fine on pump gas. Should be out hitting the streets this summer.
View attachment 739639

What lifters did you use? I’ve been using Morels for the hydraulic roller stuff.

 

[1967coronet440]

Electric water pump?

 

[andyf]

What lifters did you use? I’ve been using Morels for the hydraulic roller stuff.

I used Gaterman lifters and Comp conical valve springs. Worked great, nice and quiet valvetrain and it spins up to redline without any issue. This engine has a small cam in it (239/245) so it idles smoothly with plenty of vacuum but the lobes are big enough (0.600 lift) to make power up to 6000 rpm.

 

[andyf]

Electric water pump?

No, it will have a mechanical water pump in the car along with an alternator.

 

[69 GTX]

Just about the same as my build only with a 6bbl (within 20hp). Very nice!

 

[69sunfireGTX]

What is the static compression ratio?

 

[andyf]

What is the static compression ratio?

It was right at 10:1 with the dish pistons from Diamond. I went with 7.100 long rods and a shelf piston.

 

[andyf]

I'm working on getting the engine ready to go back into the car. Making sure that the headers fit and checking the fit on the starter. I haven't figure out which motor mounts to use yet but I'm leaning towards the big block A body style.

 

[Don Frelier]

Schumacher tri-y?
I thought you were an advocate for Cast Iron.
Just wanted a change?
I do like the heat shield.

 

[69 GTX]

What's the difference/advantage on motor mounts?

 

[69 GTX]

BTW how do you like that PVC valve?

 

[andyf]

Schumacher tri-y?
I thought you were an advocate for Cast Iron.
Just wanted a change?
I do like the heat shield.

I've used cast iron manifolds in this car for a long time but I decided to switch to headers with this engine. There aren't any headers that fit correctly so I got these Schumacher tri-y headers and I'm cutting them up so they'll fit and work. It is all a big experiment, hopefully I end up with something that works.
I like the head shield also. It keeps the valve cover gasket from getting scorched.

 

[andyf]

What's the difference/advantage on motor mounts?

Just ease of fabrication. I need to build the mounts on the K frame so I'm trying to find a set of engine brackets that makes the job easier rather than harder.

 

[69 GTX]

I used TTI with my trickflows and the fit great!

 

[Kozlow]

Looks good AndyF!
Did you use a Holley Sniper with it on the Dyno?

 

[747mopar]

Sounds like a stout engine, should be a lot of fun to play with.

So did you already cut those headers, the Exit looks really high? I'm also looking for a better fitting header, every brand I've seen hangs low including TTI.

 

[Oldreddodge]

Can I ask about your distributor ,ignition system ?

 

[Hemirunner]

Sounds like a stout engine, should be a lot of fun to play with.

So did you already cut those headers, the Exit looks really high? I'm also looking for a better fitting header, every brand I've seen hangs low including TTI.

We had to rework a set of Kooks custom SBF headers for the same reason. I don’t like pavement draggers..

 

[andyf]

Looks good AndyF!
Did you use a Holley Sniper with it on the Dyno?

Yes, this is a Sniper engine. I have no intention of using carbs anymore on my stuff, all EFI from now on. The Sniper works really well on these 600 hp engines. It starts to run out of breath on a 700 hp engine but works just fine on this combo. On the street it will work great since I don't spend much time at WOT on the street.