Video: My Car Runs

[383man]

Very nice sounding 340 ! Nothing wrong with the MP .484 cam if you plan to stay with it and you can run low 12's with the .484 cam. My sons very mild 383 with 3.91's ran 12.30's at 110 with the .484 cam and it was a very nice sounding and driving cam. Good luck with that nice 340. Ron

 

[threefortyduster]

Very nice sounding 340 ! Nothing wrong with the MP .484 cam if you plan to stay with it and you can run low 12's with the .484 cam. My sons very mild 383 with 3.91's ran 12.30's at 110 with the .484 cam and it was a very nice sounding and driving cam. Good luck with that nice 340. Ron

the car will run for a while with what it has, but at the end of the season, I'm gonna be looking into the new cam, and I want to go with the bigger one, as I'd like to make sure it sits right on that 11.8-12.2 area, naturally, 11s would be nicer to see...

One person I was talking to was speaking of the .508 cam, ported X heads (i have Xs on there), an M1 intake, 4.56 gear, and 4500 converter was running 11.3s in a 3100# car.

I'm not going crazy on the gear, but I'm going to get a 3000 converter and hope for 11.9s, but hopefully putting in 1.6 rockers will help out the lack of converter/gear.

 

[383man]

Have you run the car yet with the combo in it ? Oh and what is the full combo if you dont mind me asking ? Ron

 

[AdamR]

I'm not going crazy on the gear, but I'm going to get a 3000 converter and hope for 11.9s, but hopefully putting in 1.6 rockers will help out the lack of converter/gear.

The .508" cam needs all that gear and converter to run good in a 340. 340's have a short stroke and dont make much torque. If your planning on less gear say 4.10s and only 3000 rpm stall I'd stick with what you have or get something more modern. 1.6 rockers wont make up for running the wrong gear and converter.

 

[threefortyduster]

I'm not going crazy on the gear, but I'm going to get a 3000 converter and hope for 11.9s, but hopefully putting in 1.6 rockers will help out the lack of converter/gear.

The .508" cam needs all that gear and converter to run good in a 340. 340's have a short stroke and dont make much torque. If your planning on less gear say 4.10s and only 3000 rpm stall I'd stick with what you have or get something more modern. 1.6 rockers wont make up for running the wrong gear and converter.

Mopar Performance Recommends a smaller one than that 4500 to run what I plan on. Define "something more modern" for me, as I have no idea what you mean by that, unless you are talking roller cams.

As for the 1.6 rockers...I just want the extra lift they will afford me over the stockers. I know that the 340 doesn't make much torque...but there is no way in hell I"m going to put a 4500 stall converter and 4.56 gear ratio into a car thats going to see street use 2-3 days out of the week. The motor/chassis is mostly being built to how Mopar Performance suggests in their old catalogs.

 

[AdamR]

More modern would be something that takes advantage of the Mopar .904 lifter diameter. Something with a much faster rate of lift then the old Mopar cams. Ultrdyne, Lunati Voodoo cams, CompCams XE series or a StraightLine Perf. Cam all have a much greater lift for a given duration then the old Mopar Cams.

As an example My car is getting a Comp Cams XE274H its 230/237* @.050" and 480/498" with 1.5 rockers or 503/523" with 1.6 rockers.

The Mopar 284 is 243 .050" and only .484" More duration and less lift then the newer cams. The Mopar 508" cam is rated at 248* @.050" but if you measure it, its closer to 254* @.050" that cam is going to start to build power till about 4000 rpms.

I'll be running 3.91s, low gear set 904 around 3500 rpm stall in my car with a 28" tall tire. I'm only shooting for mid 12s. I think high 11s with a 340 is going to need alot more gear and converter then would be considered streetable for most.