Who has the 600hp or 700hp 502 shortblock recipe

[PLACECRAFT20]

When I moved my back issues of hot boat got thrown away so I cant remember if it was on the boards or in the mags but, I remember some member took a 502 short block changed the cam and added afr heads and I am sure some otherthings and ended up with over 600hp. Anyone remember?

[Taylorman]

That was Cyclone.

[PLACECRAFT20]

I thought it was but I wasnt sure. Cyclone are you giving up any secrets? I would like to do this to my 22 Daytona sterndrive. And I would realy like to do it with a single carb if possible.

[victorfb]

i have cyclones old comp cams solid roller cam that was in the single carbed 502 he was running in the rogers (AKA the randy killer). let me know if you are interested in it. i believe it dynoed at around 720hp but cant remember the rpms. it ran real strong when i rode in it. the bottom end was stock as far as i remember. i think he just put the AFRs, solid roller cam, intake, and a dominator carb. he would be the one to talk to about it though. maybe he did some secrets that never were leaked.

[BOOGEYMAN]

I run a 502 as well and would really like to know more about this set up!!!!!! :) :) :) :)
Travis.

[Sleeper CP]

Here is an engine I spec'ed out for a friend 11 years ago. If you want some details you can PM me.
It was built with ported Brodix oval ports and only 9.2:1 compression we hit the 650 HP goal, but feel short of the 600 lbs. ft torque goal. We could have exceeded both with Mobil 1 in the pan and 200 degree oil temp. And for some reason the guy I spec'd it for wanted to run Trick race gas on the dyno. I told him over and over that at 9.2:1 it would probably make more power on pump gas.
http://i201.photobucket.com/albums/aa150/Sleepercp/scan0009.jpg?t1185227340
Good luck with your project. This was a factory short block with bolt ons. With a Danny Crower (CrowerPower) custom Mech. roller cam.
Sleeper CP

[BrendellaJet]

Pretty sure Cyclones motor had an HP 950 carb and a victor jr manifold on it. Only reason I know is because I bought the parts used from him to run on my 548.

[PLACECRAFT20]

I was thinking stock bottom end also. I have a buddy with a full crate 502/502 he has been running in a scarab wide the fk open for 4 or five years with over 300hrs. & still going strong. When I get these $18000.00 quotes for motors it makes me wonder? I know you get what you pay for but if I could get 600hp or over with the stock 502 I am in. I would just do the 502/502 but I dont think it will be that big of a difference from the 496 h.o. 425hp that is in the boat now. I know this isnt a jet thread but I am not on the cats & tunnels buget with those guys over there. I hope I can still hang with you guys since I havent sold my jet yet.

[sleekcrafter]

I remember there was an article in one of the hotrod publications, using a ZZ502, and re camming it for more HP I have it written down as 625HP/600TQ @ 4600 the Cam was .615I and .636E with R43XLS plugs gapped @ .045

[cyclone]

ok i dug up my test info on my old 502.
-AFR 315 cnc heads
- added the severed duty Tulip valves. AFR milled the heads to get the chambers down from 119cc to 110cc . this kept the compression ratio near stock (9.6:1).
-Comp Cam mechanical roller Grind # c8VI 48768 / 4877B SR112.0
Lobe lift .389 intake/ .393 exhaust / gross valve lift was .661 intake/.668 exhaust/ duration at .050 was 254 intake/ 260 exhaust with a 112 lobe separation/ valve lash .016 for both intake and exhaust
-Comp Cams Endure-X roller lifters, 1.7 ratio aluminum rockers
-Edelbrock Victor JR Air Gap intake with no additional port work or matching
-Holley 950HP carb-stock right out of the box
-Moroso 11-quart pan
anyway the motor made over 700hp on 91 octane through a set of Bassett headers
and spun a race-prepped B-impeller about 5,800 rpm in my boat
the motor was ran hard and afterwards the heads were used on several of my motors. after 4 seasons i checked the valve springs and they were all within 10 pounds of stock. i have no doubts this setup will last awhile in a jet boat or other application.
hope this helps

[victorfb]

the ZZ502 crate is way under cammed and can gain sugnificant increase in both torque and HP with minimal mods. the aluminum GM heads that are made by edelbrock have the same casting material as edelbrocks rectangular port heads. meaning they can be ported to match a rectangular intake, or do some other port work mods without worry. the stock valve spring are rated to handle over .600 lift but for the exact specs id have to look through my files.
Brendellajet. you may be right with the 950 carb, but for some reason i remember him running a dominator aswell. probably after he went forced induction. what parts did you buy from him? i know i have the cam (the randy killer is what he liked to call it) he ran when it was a single carb normally asperated motor.

[victorfb]

ok i dug up my test info on my old 502.
-AFR 315 cnc heads
- added the severed duty Tulip valves. AFR milled the heads to get the chambers down from 119cc to 110cc . this kept the compression ratio near stock (9.6:1).
-Comp Cam mechanical roller Grind # c8VI 48768 / 4877B SR112.0
Lobe lift .389 intake/ .393 exhaust / gross valve lift was .661 intake/.668 exhaust/ duration at .050 was 254 intake/ 260 exhaust with a 112 lobe separation/ valve lash .016 for both intake and exhaust
-Comp Cams Endure-X roller lifters, 1.7 ratio aluminum rockers
-Edelbrock Victor JR Air Gap intake with no additional port work or matching
-Holley 950HP carb-stock right out of the box
-Moroso 11-quart pan
anyway the motor made over 700hp on 91 octane through a set of Bassett headers
and spun a race-prepped B-impeller about 5,800 rpm in my boat
the motor was ran hard and afterwards the heads were used on several of my motors. after 4 seasons i checked the valve springs and they were all within 10 pounds of stock. i have no doubts this setup will last awhile in a jet boat or other application.
hope this helps
yep, as useuall i was wrong again, about the carb anyway.lol atleast i was correct on the cam. those numbers match what i have here. i never ran that cam in my set up, but from what i remember in your boat it ran real hard and strong.
thanks for clearifing it all up mike.

[PLACECRAFT20]

The final answer? Hey cyclone would you do it again or would you go the high dollar motor route. (not that these are cheap) also you thin this can be done with hydraulic roller in the 600hp range?
And most inportant Thanks Guys

[cyclone]

yep, as useuall i was wrong again, about the carb anyway.lol atleast i was correct on the cam. those numbers match what i have here. i never ran that cam in my set up, but from what i remember in your boat it ran real hard and strong.
thanks for clearifing it all up mike.
No problem Vic. how's Toni doin?

[cyclone]

The final answer? Hey cyclone would you do it again or would you go the high dollar motor route. (not that these are cheap) also you thin this can be done with hydraulic roller in the 600hp range?
And most inportant Thanks Guys
i'd definately do it again. its a super easy package to put together. buy the 502 short block and just throw the top end on it.
If i wasn't into drag racing then i'd build another 502. its the cheapest way i can think of to make 700 ponies on pump gas. you can definately make 600hp with hydraulic roller. call the guys at comp cams and tell em what your application is and they'll set you up with the right cam. They spec'd the cam for my 502 and it worked great.

[victorfb]

No problem Vic. how's Toni doin?
Toni is doing awsome, thanks for askin. due date is feb 2nd and im feeling like a kid waiting for santa clause to come. :D now its your turn, quit spending money on the trojans and get with it man. :D

[Daytona100]

ttt. Mike:D

[BOOGEYMAN]

There is 100 hp difference between the solid and the hydraulic roller??? :confused:
Travis

[PLACECRAFT20]

I just wasn sure how often I would have to run the valves if it was solid? Oh by the way I have to worry about reversion. Will these cams give me trouble?

[hotbo]

I just wasn sure how often I would have to run the valves if it was solid? Oh by the way I have to worry about reversion. Will these cams give me trouble?
well im not sure about reversion,but with a soild roller you will only have to run your valves at first till things get fully wore in,then not very often,i like to check my solid roller motors or flat tappets once a year after that and they are usually still in specs.:D things have came along way with solid profiles and valve adjustment.:D

[Sleeper CP]

There is 100 hp difference between the solid and the hydraulic roller??? :confused:
Travis
The hydraulic roller will limit you to around 6,500 rpm's.
He said" You can make over 600 hp not you are limited to 600 hp. With the correct Hydr. roller you cam make better than 650 hp but it wont be as easy as with a soild. And 700 might be out of reach for this type of application.
Sleeper CP

[Sleeper CP]

I just wasn sure how often I would have to run the valves if it was solid? Oh by the way I have to worry about reversion. Will these cams give me trouble?
Run it, re-torque the heads set lash again. Next time out check lash, readjust. Should hold after that.
Sleeper CP

[hotbo]

this has sparkes some interest:idea: my brother just bought a 79 jbx jimmy johnson tx-19 made in vian oklahoma him and jim youngblood worked together in the 70s,anyway im going to build him a mill.how much are the 502 short blocks:idea: :confused: are they built good in the lower end,good rods ect.i was going to build him a nice 468 since he wont have the dough to go stroker:devil: but the damn 468s are everywhere and they are a dime a dozen in my area.the last motor i built 3 months ago was a 100 over bbc 4.25 stroke rod was 6.35 the ole 496 setup and it makes right at 700hp at 6100and dads boat turns 6200,so what im asking is can the 502 short blocks be got cheap enough cause we had a large sum in the last build.if i can do the 502 build and get him to the 650-700hp mark cheaper that would be the way to go.:idea:

[Sleeper CP]

Hotboa,
Check out www.rehermorrison.com look up Short Blocks on the left side of
main page. Wow hard to beat pricing listed at $ 4,795 & $6,295. up to a
$ 1,600 savings.
And I'm a die hard Ford guy, but at those prices.........(NFW:rolleyes: I'd rather swim)
You can buy direct from your Chevy dealer also.
Sleeper CP

[PLACECRAFT20]

5800 rpms sounds good to me. With the 22 Daytona I am interested at 40 to 50 mph on races. So I may go for a long time at wot. The bright side is with the outdrive it winds to max rpm instead of 5800 right off the bat.

[MudPumper]

ok i dug up my test info on my old 502.
-AFR 315 cnc heads
- added the severed duty Tulip valves. AFR milled the heads to get the chambers down from 119cc to 110cc . this kept the compression ratio near stock (9.6:1).
-Comp Cam mechanical roller Grind # c8VI 48768 / 4877B SR112.0
Lobe lift .389 intake/ .393 exhaust / gross valve lift was .661 intake/.668 exhaust/ duration at .050 was 254 intake/ 260 exhaust with a 112 lobe separation/ valve lash .016 for both intake and exhaust
-Comp Cams Endure-X roller lifters, 1.7 ratio aluminum rockers
-Edelbrock Victor JR Air Gap intake with no additional port work or matching
-Holley 950HP carb-stock right out of the box
-Moroso 11-quart pan
anyway the motor made over 700hp on 91 octane through a set of Bassett headers
and spun a race-prepped B-impeller about 5,800 rpm in my boat
the motor was ran hard and afterwards the heads were used on several of my motors. after 4 seasons i checked the valve springs and they were all within 10 pounds of stock. i have no doubts this setup will last awhile in a jet boat or other application.
hope this helps
Nice Mike. I've been waiting months for this recipe. :D :D

[cyclone]

Nice Mike. I've been waiting months for this recipe. :D :D
whoops. thought you didnt want it after you got the fire breathing ford together. lol

[MudPumper]

whoops. thought you didnt want it after you got the fire breathing ford together. lol
Just bustin your balls a bit. It was either the 502 or build up the Ford. The Ford ended up being a little more cost effective for me. :D

[Sleeper CP]

Bump

[junkyardhunter]

its dead in here :skull:

[Sleeper CP]

its dead in here :skull:
Everyone is having the picnic somewhere else :idea:
Sleeper CP :D

[Schi-502]

This sounds like a winter project...

[cyclone]

i beat that 502 like it owed me money for a years. ended up selling the top end to board members and rebuilding the bottom end for a blown deal.
the only drawback to the gen VI stuff is that you can't go big with the bore size (4.56 max i think) and most everyone runs Gen IV stuff.

[edog_103]

i beat that 502 like it owed me money for a years. ended up selling the top end to board members and rebuilding the bottom end for a blown deal.
the only drawback to the gen VI stuff is that you can't go big with the bore size (4.56 max i think) and most everyone runs Gen IV stuff.
Nice info on this thread.
I am trying to get something together with an old 4 bolt main 454 block. I am wondering of it's even worth the money to use the 454 block, or just get the 502 short block. It's only going on a river boat. No racing for me.

[jrork]

Bump for a good thread...