470 build - Need some insight - 68 Dart

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1967 Cuda

1967 Cuda

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I am reaching the mid point of a 68 dart build and am looking for some insight. I had purchased a 470 locally as I know the shop that built it. The engine utilizes INDY S/R heads that were fully ported by Indy (Flowsheet says 351 CFM intake and 233.1 EX @.606) Bottom end is eagle 3.91 crank with eagle 6.760 rods and Ross forged FT pistons. Compression ratio was calculated by the builder to be 11.18:1. The engine is currently set up with a Trickflow (TFS-61602003) hydraulic roller cam that is .600 lift on both the intake and exhaust. (I attached a picture of the cam card and IN degree) It is also using Trickflow hydraulic lifters and PAC 1914 valve springs. Intake is a heavily worked Holley street dominator that should flow pretty well.

My question is in regards to the Trickflow cam. The cam was originally selected for a 4 speed car, but I and planning to run an automatic in a street/ strip setup. In looking at the specs for this cam, I am a little concerned as they show the power band coming in at 3,000-6,500. I know that the 470 will change things a little bit, but I haven't found any write ups on people using the trickflow cam and what they thought of it. I would like to stick with this cam if possible, but would change it now before I install the engine if it isn't a good fit. I should mention that I am going to be running a 27" tall tire with 3.23 gears. Has anyone run this cam in a low deck stroker and have any thoughts on this combination?

Last question I have is in regards to the trickflow hydraulic roller lifters. Have people had good experiences with them? I read a few comments about issues with lack of oil pressure on some builds, but I am not sure if they were using the same retrofit trickflow hydraulic roller lifters that are in this motor. Posting a couple picture of the motor and build which will hopefully be on the road later this summer.

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Honestly that cam is too small for the heads capabilities but might help the bottom end torque numbers. Your peak torque with a max wedge port is about 5700 rpm. (But I would just run it and see how you like it).
Your 470 will move that car with that gear, tire and will not even try lol.
I'll give you an example of my 470 and trickflow 240 heads (standard port) with a 1.6 rocker. 260-264 @ .050 duration and .656-.660 lift my engine made peak torque around 4k rpm over and peak power at 5700 and my cams rpm range is up to 4000-7300 rpm.
By the way it looks like that's going to be a beautiful dart.
 
Last edited:
not much help
I did run 3.23s with 26.99 tire 340 with spray
both 4spd and auto
it trapped in 2nd with the 727
you will have gobs more torque
it was stupid fast on the Hi-way
i love 3.23s
 
I think the cork in the system will be the Holley intake feeding 470 cubes. Since you have the cam & intake, why not just try it??
 
Imo that cam will be fine for what you have, it will be a beast down low in a 470, just keep the tune up tight with that combo for pump gas. Just be careful doing any kind of a long burnout with that setup and 3.23 gears lol, the wheel speed will be nuts!, but what a blast on the street.
 
MOPARMAGA said:
Honestly that cam is too small for the heads capabilities but might help the bottom end torque numbers. Your peak torque with a max wedge port is about 5700 rpm. (But I would just run it and see how you like it).
Your 470 will move that car with that gear, tire and will not even try lol.
I'll give you an example of my 470 and trickflow 240 heads (standard port) with a 1.6 rocker. 260-264 @ .050 duration and .656-.660 lift my engine made peak torque around 4k rpm over and peak power at 5700 and my cams rpm range is up to 4000-7300 rpm.
By the way it looks like that's going to be a beautiful dart.
Click to expand...
Thanks......this is exactly the kind of feedback I was looking for. I know the cam might be a little small to fully utilize the head potential, but it leave me room to make upgrades in the future. (I was in the process of building a 512 before this motor became available and I would have went with Trickflow heads in that case. Either the 240s or 270s)

I appreciate the comment on the Dart build. Thanks for the response!
 
a-bodyguy said:
not much help
I did run 3.23s with 26.99 tire 340 with spray
both 4spd and auto
it trapped in 2nd with the 727
you will have gobs more torque
it was stupid fast on the Hi-way
i love 3.23s
Click to expand...
Yeah, we have a 69 340 4sp dart with 3.91 gears and it isn't fun on the highway. (Manageable, but not optimal) My dad has a 68 Coronet R/T that had the trac pac 4.10s in it. We built a 493 RB for the car and I went with 3:73 gears to try to be in the middle. What we found was that the motor had plenty of torque and we ended up switching to 3:23s for his car as well. Car actually feels faster and is much better on the highway. Decided to go the same route here.
 
Bewy said:
I think the cork in the system will be the Holley intake feeding 470 cubes. Since you have the cam & intake, why not just try it??
Click to expand...
I agree with you regarding the intake. The gentleman I bought it from went with this intake for hood clearance, but he spent considerable money working on the intake flow. It has been extensively ported and port matched, but is still probably the cork in the system. I plan to run a 1" or 2" spacer to smooth out things in the plenum, so that should help a bit as well.
 
lead69 said:
Imo that cam will be fine for what you have, it will be a beast down low in a 470, just keep the tune up tight with that combo for pump gas. Just be careful doing any kind of a long burnout with that setup and 3.23 gears lol, the wheel speed will be nuts!, but what a blast on the street.
Click to expand...
Thank you for the feedback. I have a super sniper EFI system that will be going on this motor, so I should be able to monitor the tune and adjust timing as needed from the car. I was actually told that the S/R heads run a bit cooler than others out there and that is why the compression was bumped up a little. I would have had it more in the 10.5 range, but was told I should be good for pump gas with these heads and the 11.18:1 compression ratio.
 
1967 Cuda said:
Yeah, we have a 69 340 4sp dart with 3.91 gears and it isn't fun on the highway. (Manageable, but not optimal) My dad has a 68 Coronet R/T that had the trac pac 4.10s in it. We built a 493 RB for the car and I went with 3:73 gears to try to be in the middle. What we found was that the motor had plenty of torque and we ended up switching to 3:23s for his car as well. Car actually feels faster and is much better on the highway. Decided to go the same route here.
Click to expand...
with that motor slicks and a verter you should be part of the 11 second 3.23s club :)
 
Converter choice will be critical with that much power, and only 3.23 gears. You'll need a quality custom converter from a Mopar specialist (ptc, dynamic, others also). Don't scrimp,it won't be cheap, could make or break the combo.
(Also, you HAVE the cam....run it!)
 
33IMP said:
Converter choice will be critical with that much power, and only 3.23 gears. You'll need a quality custom converter from a Mopar specialist (ptc, dynamic, others also). Don't scrimp,it won't be cheap, could make or break the combo.
(Also, you HAVE the cam....run it!)
Click to expand...
We have used A&A for the last couple of builds and have been happy with their converters/ transmissions. I plan to have them make me a converter based on the specs, so hopefully it works well. (I know the importance of a good convertor)
 
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