power out of a 502

[Coryj]

I know this subject has been talked about, but I am looking for more power out of my 502 mag.. I currently am running a 23' Stingray to 73 mph gps on 80 degree day around 4800 rpm. I have a XR drive 1:36 ratio spinning a 26 pitch 3 blade mirage. I was thinking of having the heads done and possibly a new cam. I don't want to get into the lower part of the engine. I know I need MSD ignition. But any other suggestions would be greatly appreciated.

[SmokinLowriderSS]

Beware too much duration on the cam, it pushes the power into higher rev zone.
Intake, exhaust improvements, head porting or replacement can all net increases. Think carefully where you want the power so you can pick parts wisely.
Honestly, IMO, the only reason you "need" an MSD system is if you want a ton of adjustability such as exact advance curve and rev-limiting, or your current system is not working well. If your current system is working properly, all the hi-$$$$ ignition in the world won't make squat in additional HP. $1000 better spent elsewhere.

[DMOORE]

Instead of porting the stock heads , you may want to inquire here if anyone has a set of REALLY good heads for sale at a good price. You can then sell your stock heads and be better off in the long run. Just like SLR SS said, make sure the cam is going to work in the right RPM range. Most likely up to 6000rpm.
Darrell.

[x7734x]

I have a complete vortech blower package for sale. Blower, superchiller, manifold, throttle bodies, fuel injection, computer, and FPR, for sale that would bolt right up to this motor.

[cstraub]

Here you go:
502cid - 100% stock short block other than min. deck cut to make flat
8.8 compression. Did not zero deck - pistons .012" down + .040" headgasket
850 Sea Demon 82P 90S
HVH 1" Super Sucker
HV/Brodix 2000 Intake
Canfield 310 heads / CNC Chamber / No Port Work
Cam - custom Hyd Roller Just under 225 at .050 I w/112LSA
2" Primary Schoenfield Headers - dyno mufflers
Will test Gill Exhaust again when done testing in this state
Belt driven Sea Water pump working - cross over - alternator working - no PS pump.
89 octane fuel - yep, Winter Blend right from the gas pump.
35 Degrees total timing - HEI external coil distributor ( yes, the computer one) with Jacobs amplifier/coil
RPM HP Torque
2100 194.3 483.8
2200 206.6 495.67
2300 217.5 498.52
2400 231.0 505.70
2500 243.9 512.60
2600 256.8 519.00
2700 269.2 523.36
2800 279.9 524.64
2900 288.2 521.78
3000 295.2 516.70
3100 302.8 513.17
3200 312.2 512.08
3300 323.2 514.40
3400 336.7 519.97
3500 351.9 527.69
3600 374.4 542.69
3700 387.9 550.14
3800 406.6 562.41
3900 424.7 572.21
4000 440.7 578.35
4100 457.4 584.13
4200 468.2 586.44
4300 480.3 586.50
4400 490.9 585.93
4500 500.4 583.75
4600 508.8 580.29
4700 515.1 576.90
4800 526.3 575.77
4900 531.4 569.77
5000 536.0 563.20
5100 540.2 556.26
5200 540.9 546.34
Note this combo was also dyno'd with the OEM Gil short risers in wet configuration. Power loss was an average of 7HP in wet. This combo was flogged on the dyno for several days of testing.
This combination will work with silent choice with no reversion problems. AFR 305 or 315 heads would also work just fine.

[Coryj]

Instead of porting the stock heads , you may want to inquire here if anyone has a set of REALLY good heads for sale at a good price. You can then sell your stock heads and be better off in the long run. Just like SLR SS said, make sure the cam is going to work in the right RPM range. Most likely up to 6000rpm.
Darrell.
Any one out there have a set of really good heads for sale or maybe an intake? I missed out a set of vortec 100 cc heads on ebay. Didn't know about the subject to determine whether or not they would give me any gains. I am learning a lot on this forum, but still have a ways to go. They sold for $500 and that seemed like a deal. Is doing the heads without doing a new camshaft a possibility?
thanks everyone,
Still learning

[jbone]

Cstraub69,
Hey Chris do you think my cam would work for his application. it seems like he has the same goal I had with my 502.
I sent him the specs if you forgot what they were.
J

[cstraub]

J,
Yes the cam would be effective for what he has. He would have to put a set of Link bar Morel Hyd. roller lifters to deal with the lift but yes that cam is designed to work with the OEM heads.