AFAIK, all Mopar cams are discontinued.

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Official Cookie and Mater Tormentor.

I'm betting Flyntgr will pick up at least 3 tenths with the converter alone.

I got on my cheesy old "KB DYNO" $10 program just to see what it would come up with on the 225 engine. I put the following parameters in:

comp. ratio - 10.5/1
intake valve size - 1.7 inch
port description - above average
mech. cam - .525 lift, 300 degrees duration, 110 lobe centerline

That sounded pretty stout to me.

The results were 238.6 HP at 5625 rpm and 260 lb. ft. torque at 4125.

386 cfm carb required at 100% volumetric efficiency.

FWIW.

My guess would be that is a little generous. Slant ports need a lot of work just to get them to "average". They suck to start with.

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Official Cookie and Mater Tormentor.

DusterDougr, my humble opinion a cam with a 286 degree profile will be wonderful if you are running on a NASCAR track or at Bonneville on the salt flats. Otherwise, I believe it's much too much for street/strip use. You'd have NO bottom end performance, and a stock 2bl slant could beat you to the 60 foot line. The engine I have is about all the cam you could use on the street, and that's assuming a 10" high stall converter. For street/strip and a less radical converter, you'd be better off with about a 250-something cam, depending on rear axle and wheel/tire size you end up with.

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Restored '62 Signet, 229 4bl, Offy intake, auto, Dual Dutra exhausts, shaved head and block, high stall converter, 1.6 roller rockers, etc.

I have run up to 0.530" on the street, 250 @0.050" duration. With the right tuneup, this can work fine with a 3000 stall converter and still get 20+MPG with 3.23/3.55 gears. The 225 can tolerate a lotta cam and a lotta compression...

Erson has an off-shelf grind (Summitracing.com) with close to the specs on my 64 Dart motor (248/252 @0.050" or thereabouts).

I would suggest a 9.5-10" converter with 3000-3400 stall, 3.55 gears, 10:1 comp. This should get you 14s no problem and around 230-280HP.

Lou

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Home of Slant6-powered fun machines since 1988

You've all been very helpful and I think I'll start with the Erson cam and see how well that performs. It may perform better than I think, and of course I still have a lot of other parts and variables to work out first.

Again, thanks a lot guys! And I'll have a lot more questions in the near future

FLYNTGTR,
The 15.6 1/4 mile run was @ 90mph. this was ran on mostly bald street tires, and it was also my first time drag racing so my 60ft times were terrible, (couldnt keep it from spinning]. I was also only using a 460 lift racer brown cam at the time. I havent raced the car with the new cam [570 lift 305 dur.] but it definately has alot more high end h.p., and it still has a fair amount of low end torque. Im guessing that with the new cam, and my new street slicks we should be in the mid to low 14s. and even with the big cam the car still seems pretty streetable, now I just gotta get it to the track, and see what it does.

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Ryan Covalt
62 Plymouth Valiant Race Car 2170# 11.008 @ 117.65 MPH 1/4 Mile Best
72' Dart Swinger Street Car, 4 spd, 3330# 14.061 @96.58 1/4 mile Best

Ryan,

I assume you are coming to the Pittsburgh Slant race. I'm going and would love to meet you and your Dad.

The 225 has a long stroke/small bore, which means fairly small valves for the displacement. This means it can tolerate a lot more cam and still have good low end perf. I believe this is also the reason you should run 26-30 deg of total timing advance for best power. Anything over that hurts you badly.

225s also like a LOT of advance on the cam - like 8 deg advanced over a comparable V8 cam. Take whatever the cam manuf spec is and advance it another 4 deg. This will not hurt you much on top end at all, but will help a lot on the low end.

Lou

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Home of Slant6-powered fun machines since 1988

The Erson cam at Summit is ERS-E470521 for $120. Pretty long on advertised duration at 286/294°, but the .050" lift duration is 242/246° and is .510" lift. Lash is .022" which makes me wonder about valve train noise. Summit also shows 270 and 280° cams available, but only has full specs on the 270. The Erson 270 has the same rated duration at .050" lift as the Comp 264S. Anyone have experience with both?

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Joshua

mopar only has the 264/468 lift, on the street 520 to 540 lift with a 3.90 gear is nice,with the compression i would deck the block and leave the comb chamber as big as possible at 9.5 compression

[quote="Dart270"]I have run up to 0.530" on the street, 250 @0.050" duration. With the right tuneup, this can work fine with a 3000 stall converter and still get 20+MPG with 3.23/3.55 gears. The 225 can tolerate a lotta cam and a lotta compression...

Erson has an off-shelf grind (Summitracing.com) with close to the specs on my 64 Dart motor (248/252 @0.050" or thereabouts).

I would suggest a 9.5-10" converter with 3000-3400 stall, 3.55 gears, 10:1 comp. This should get you 14s no problem and around 230-280HP.

Lou[/quote]

Lou,

What Carb has worked best with this combination???

Best times with Edel 600 4bbl, but I suspect a 500 4bbl would be as good or better.

Lou

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Home of Slant6-powered fun machines since 1988

hey lou,
I hate to say is but were not gonna be able to make it to the pitsburg race this year. We are currently in the process of converting the dart to disc brakes, and upgrading the suspension-(super stock springs/shocks/torsion bars ect.) so the car is not together right now, and on top of that my younger brother joined the army and he left this week, so we didnt have time to get ready for the race. I was really hoping to meet you there, and learn about your efi setup, and get to know the rest of the slant six racers. Best of luck to you, I hope it is a great weekend for racing.
-Ryan

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Ryan Covalt
62 Plymouth Valiant Race Car 2170# 11.008 @ 117.65 MPH 1/4 Mile Best
72' Dart Swinger Street Car, 4 spd, 3330# 14.061 @96.58 1/4 mile Best