there was a 1970 dart swinger floating around ebay and such from up in the dallas area.

he had a TT440 running 10 psi making 530 rwhp and 830 lb ft of torque and it put his a-body well into the 10's.

he was using this off the shelf mopar performance cam.

272° Hydraulic: P4286677
Intake Duration, Nominal 272° Exhaust Duration, Nominal 272°
Intake Duration @ .050" 231° Exhaust Duration @ .050" 231°
Intake Lobe Centerline 110° ATDC Exhaust Lobe Centerline 114° BTDC
Lobe Separation Angle 112° Overlap 48°
Intake Opens 26° BTDC Exhaust Opens 70° BBDC
Intake Closes 66° ABDC Exhaust Closes 22° ATDC
Intake Lift .455" Exhaust Lift .455"


Note: 222° @ .050"


i was amazed that he made that kind of power to the wheels without a custom grind.

what do you think about that selection in a turbocharged 440 ?

 

The lift is a bit low, but when you're feeding air into 440 cubes it doesn't take much to make a lot of power

I have a 68 roadrunner with a mild .030 over 440, ported stock heads, an edelbrock dual plane, and put through a 4-speed. It's very tempting to do a turbo setup, but I don't know anyone that makes off the shelf low compression pistons for 440's.

 

take a look at the trw/speedpro piston with this number L2388F , they come in a range of overbores and you might be able to get them in a rebuild kit from summit for about $500 +/-

the approximate cr with 78 cc heads would be 8.2:1 and with the 88cc chamber eddys you would get 7.7:1

 

Not that bad a cam for a BB turbo.

Pluses are no split to exhaust side, 114 separation.

Minuses, it would be nice to have a bit faster ramps to reduce the advertised duration and increase the lift.

Duration is a bit higher than I would chose, but I am not that familiar with BB cams and their operating range of rpm. He is making big torque compared to hp, so he has to be fairly low in the rpm range, I would think.

For years the standard turbo cam for those of us without a lot of money was an RV cam, which would be very similar to what is in his.

 

i had heard that the mopar 440 six pack cam would be a good turbo cam , adv duration was something like 268/284 but it was ground on a 114 LSA ..


im trying to find the exact specs right now..

 

My little cam makes good power. It's a custom grind but didn't cost much more than an off the shelf unit. In fact, it uses a standard blank use for several of their cams.
The duration is higher but it's still a docile unit.

As for sheapie pistons, I use the low-buck Summit rebuild kit in the hot rod. It's got the low compression forged pistons that give me an 8.7:1 ratio using stock 452 heads.

 

now that ive moved up to a 440 , i will use your custom ground cam.

comp cams said the grind would be less than optimal for a 383 so i strayed a bit

 

They know more than I do.

 

What about using a repro 340 cam.
It's got a 114lsa, 210/[email protected], and mid .450ish lift for very cheap.

I know it's split but I've heard that the SS 218/218 is a good base cam for turbo cars. Soooooooooo
Whataya think.
It would be in a 318 with T1/T3's. and .48 ar turbines.

Just a daily driver with a little bit of umph.

 

Procharged: The cam I had in the old TT340 was very similar to that spec 210/220 at 50, 114 separation. It had a little bit faster ramps (shorter advertised) and a bit more lift, but not much. It ran real strong under boost with the ported X heads, but was pretty weak at the bottom until I had good boost at about 3000. I am not sure how much of the softness was too big heads or the cam, but the new engine with smaller heads and cam is much better and more driveable at the low end, and the boost comes in about 250 rpm sooner.

In the 340 with 7.75 to 1 compression it idled at 750 with 18 inches vacuum and held about the same at 60 mph and 2000 rpm.

 

That TRW piston is a great froged piston for the price...They are only like 370 for a set I believe....We used a set in a 440 with a BDS 8-71 and with the 904 head he got just under 8 to 1!!!!!!

 

feets has subjected his to 17 PSI with good gas and no il effects.

 

WOW, YOU CANT GO WRONG WITH THAT....

 

turbododge,
I was thinking about using the ported 318 heads for more velocity and torque.

What are your cam specs now with the smaller heads?

Are you saying the bigger (210/220) cam would be better with a 360?
I've got a couple of those too but don't have big enough turbos on hand to fit the larger cubes.

 

a set of 308 swirl port heads would have better port velocity when compared to a set of 915J or X heads.

 

Procharged: Form what I have seen so far, the 302 heads (ported 1.88/160) with the smaller cam (208/200 at 112, fast ramps) (I went very small for testing with the option of going to 1.6 rockers later if I need to) and the Performer, are a huge improvement in low to mid performance. I am still tuning mixtures so I haven't put full boost and rpm on it, so I don't know if I lost anything on top.

The main thing is that I have just about the same intake duration I had before, but really shortened up the exhaust (which you don't need a lot on). This allowed me to put the cam in without worrrying about the exhaust opening point very much.

This next winter I will be adding some more sensors for temp and pressures for the exhaust and around the intercooler to better be able to evaluate what is really happening.

On a 318 that might be a bit much cam, unless you are looking for a bit higher power curve than I am.

 

It would be going into a b-body so I better nix that idea.

Doesn't SSI in the PAW catalog have a 208/208 cam? Would that work better? I'm a cheap A$$. I think it's like $49.

 

I think they do. Edelbrock has one that is like 204/204 too.

 

PAW has the 204-204 @ .050 cam , ground on 110 with .420 lift for $49 . the part number is 11308


ive got the chrysler PAW catalog , tell me if you need any prices or PN's.

 

runner,
I just got the 04 mopar catalog a couple days ago and havn't had time to study each page.

I did notice that the crower turbo cams are not listed in the mopar catalog but I saw them in the one from 96. The only other one I've got.

Thanks for the heads up.