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Author Topic:   ? about a mod motor
the_one
Dirt Full Roller

Total posts: 49
posted March 04, 2005 10:20 PM  
what cam do you guys think a 383 with dart iron eagle 215 runner 49cc with srp flat top pistons and a jim evans 750 alky carb needs and do you thinks this motor will have good power

[This message has been edited by the_one (edited March 04, 2005).]

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted March 05, 2005 10:17 AM  
It depends on what you want to spend as far as cam wise. You can spend a little and get a JRM or Midwest cam. There good cams made specifically for these exact racing applications, but give up a little due to being out there so long. You can also call Comp, or any other cam grinder and design a custom cam for your motor, car, track, rpm...

You'll see good power out of the motor for sure. Look at the 525 hp range maybe more with the right cam.

zeroracing
Dirt Forum Champ
Total posts: 1876
posted March 10, 2005 01:04 PM  
good starter motor for a mod. i agree with xtreme12x the cam will make a difference. call up jrm and ask them what they reccomend. and roller or solid will make a difference.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 10, 2005 01:09 PM  
The cam is a vital part of making HP. I would look at some of the newer grinds available from the manufacturers. The ones from JR Midwest etc are alright, but prob arent the most up to date. Also I think quality will come into play as well. I know guys that complain about wearing out a cam in 15 nights and we ran the same ISKY cam for 4 years, so it makes me wonder what those guys are using......

Kromulous
Dirt Forum Champ
Total posts: 796
posted March 10, 2005 01:24 PM  
Running on acohol? looks like you will be, you should be up over 13 to 1 with those heads.

Forged pistons, and what kind of rods?

215cc Runners on a 383 will be good and have plenty of torque.

What intake? 2925 Edelbrock super Victor?

Alot Variables but i got a recomendation from the guy at Lazer cams, i think i would call them and or email them and he will hook you up with what he thinks would be best.

This is a Roller, that i think would run nice in that application.

Camshaft: 2920816

Duration: 292 297
@.050: 250 255
Lift: 645 649

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 11, 2005 11:23 AM  
If you do end up around 13:1 with that setup I would guess you'll be closer to 575HP.

A good flat tappet cam for that would be Isky #201571 286I 290E (258-262@.050) .570 .580 lift W/ 1.5 rockers. Another one just a hair smaller is Isky201563 its 254-258 @ .050 (I think) roughly .560-.570 lift. Might think about going with a smaller grind and putting 1.6 rockers on the intakes. Just depedns on where you want your power band.

[This message has been edited by dirtbuster (edited March 11, 2005).]

the_one
Dirt Full Roller

Total posts: 49
posted March 11, 2005 12:53 PM  
the motor has an eagle 4340 crank and oliver 6" rods i have two brodix intakes desighed by jean dittmer one is on my 410 it works very well i also called steve huggins to make a roller cam for the motor he allways took good care of me with my sportsan motors

[This message has been edited by the_one (edited March 11, 2005).]

[This message has been edited by the_one (edited March 11, 2005).]

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted March 11, 2005 01:16 PM  
We have ran a lot of Huggins cams in our mod stuff. Good cams. If this is the case with a good roller cam, your looking around 600 HP. You've got a good solid bottom end that'll support the hp and RPM.

Kromulous
Dirt Forum Champ
Total posts: 796
posted March 11, 2005 01:25 PM  
Just keep the exhaust duration under 260* @.050 lift and you'll be cookin. Thats with running alcohol.

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