Odd ball combination-CME

[Strawdawg]

Over the past few years I have gone thru the '73 Challenger that I bought some years ago...it was in far worse condition that I thought when I bought it.  I think that is pretty typical.

I installed most of the Hotchkis suspension parts which has given the car a go kart feel which is what I wanted but certainly did not help front to rear weight transfer but I did not set out to build a strip car.
 
Eventually I made some changes to the engine to make it more streetable than it initially was....mostly I just matched up the combination so that things worked better together.

Last summer, I started to think it was really weak compared to my turbo Buicks and had a lot of conversations with CP.  My first decision was to buy a set of Stealth heads and I was going to deck them to about 75 cc and do a little porting on them.  Right after I got the heads and a set of PRW stainless rockers, I saw an ad from CME and after doing some research on them, I decided to say the heck with it and just order a complete engine.  I sent them the heads that I had ordered with the usual upgrades.

The combination is totally different from what I would spec and i still keep looking at the numbers and think that with a few tweaks this would be a strong engine..but, it would neither fit the chassis set up or the fact that I have a 32 year old son that is not as mechanically inclined as I am or used to be

Anyway, the engine is a 4.375" square stroker with the Stealth heads, 10-1 CR using KB forged pistons, 4340 crank/rods, 238 deg cam with 0.536" lift, an Eddy RPM intake, and a 780 Quick Air vacuum carb.

Definitely not what I would spec...but the numbers look like a diesel plot and I think it will work perfectly for what I want for this car...may be more like a drift car-sideways at any speed....

I hate to post the numbers right above Al's build but they do show what combination is all about.  I thought they were interesting.

[ToxicWolf]

I like torque.   

[dfrazz]

I had CME do a 408 stroker for my '71 Challenger and the dyno said 495 lb TQ and 465 HP.  Strawdog - you better hang on when you punch it!

[Strawdawg]

I bet the torque curves looks somewhat similar to the above when plotted...    No waiting to get up on the cam and no need for a 3500, or more, rpm converter to make it responsive on the street.

[dfrazz]

I bet the torque curves looks somewhat similar to the above when plotted...    No waiting to get up on the cam and no need for a 3500, or more, rpm converter to make it responsive on the street.

495 TQ at 3200 RPM, right out of the gate.   

[Chryco Psycho]

Looks like what I would expect .. Hang on !!

 

[Strawdawg]

It's basically an RV engine when you boil it down

[moper]

Yup. It will be fun to drive if not the cause of a horrific tire bill...lol.
It's all relative.
A a stock 440 power curve is torque peak around 3300 & horsepower peak around 4600. Using round figures you added better machining & parts quality, 15% more stroke, around 12% more cam, and about 14% more head - and the output is about the same rpm ranges, and the power's about 26% more all the way around (24% more torque, 29% more hp) and 16% higher in the rpm range.

[Strawdawg]

Yup. It will be fun to drive if not the cause of a horrific tire bill...lol.
It's all relative.
A a stock 440 power curve is torque peak around 3300 & horsepower peak around 4600. Using round figures you added better machining & parts quality, 15% more stroke, around 12% more cam, and about 14% more head - and the output is about the same rpm ranges, and the power's about 26% more all the way around (24% more torque, 29% more hp) and 16% higher in the rpm range.

I had not thought of it in terms of percentages but it makes sense that way as well   It's really an intelligent combination for a crate engine with a guarantee.  The heads are way small for the engine size so it will fall flat if it is over revved.  The cam, carb, and intake, are all sized recognizing the air flow limitation but doing so really builds the torque.  I may have to invest in some Chinese tire stock