custom roller cam and spring question

[RedCSX1]

I am actually guessing that its between 135-145 seat pressure. I would give Comp cams a call for the information you are looking for. Might ask about the bee hive springs.

[RICK LAKE]

wrench 87 I know you are in a hurry to get your car and motor done. Here's the thing, For the money differents between the box heads and having the heads ported and flowed, Is it not worth the wait? There is 20-50 HP by now having the heads done. I waited 13 months for a short block from my machinist because of speciality work he was doing. I hated the wait, but worth it in the long run. I have a motor in the basement, Like you I have gotten most the parts. Block, Custom camshaft from KCR, TWM 58mm setup, T&D rocker setup, Edelbrock heads, pro flowed, DannyBee timing belt setup, All the Fle-Pro gaskets, all the ARP bolts and studs. I am working on the Drysump system. Work in process. Anyway save your money until you can do the motor right. Instead of doing stock heads and putting a large cam in the motor, WAIT. You will get no where near the power of the motor you are looking for. Your exhaust is another power choker, the side pipes on your cobra will cost another 20-40 HP without and other changes to the motor. I have 2 sets of pipes from ERA, one for the street, and the race pipes. There is a big differents between them. There are 3 spring numbers that should work on your heads if you go Beehive springs 1, #26120 The ones I use, they have a .600" max lift. You can cheat a little with hydro lifters on these. seat pressure is 145, max open is 377, rate on spring is 370 lbs. per inch. 2, 26055 has a .650" max lift. 150 seat, 410 open, rate on spring is 400lbs. per inch. 3, is 26095 this is the .750" lift this is the custom spring seat is 150 lbs. the max opening is based on cam lift. It is a soft spring with 293 lbs per inch. This spring is for running a light valve train with 8mm valves, aluminium rockers. small push rods, solid lifters and a rev kit if you build it. There are cross overs for the springs from say the 986 dual spring which alot of guys use to the 26986 beehive. They do the same thing but the beehive has less weight to control, again about 40 grams. Do yourself a favor and wait Put the right stuff together you will save monet and be alot happier. I know. Rick L. No I didn't stay at a Holiday Inn express last night. I stayed in the basement looking at the boxes of parts.

[wrench87]

rick, my car has been done since 2005 i just have the 342 in it , i am just switching to the fe for a project. i dont believe 30-40 hp is worth 1200.00 for a street car. i would like to get something in the 1600.00 to 2,000.00 price range. i saw that flatlander racing offers stage 1 to stage 3 heads but once again they have the stock springs, i think a spring upgrade was up to 300.00 i would like to it once and do it right. i do see some people bolting on stock edelbrock heads on 482's i wonder how they perform?. does barry r or kc offer different stage heads?. if so is any body running them?.

[RICK LAKE]

wrench 87 IMO I don't think that anyone buying a KCR motor in the 480+ cubes is going to run stock Edelbrock heads. They just don't have the flow in stock form for a motor this big. He has 3 stage heads and I see from reading forums that most are either stage 2 or 3. Your cam is just a little bigger than mine in my 482" motor. With 445" At least have the bowl area cleaned up. You can match port the intake and exhaust your self. There are plenty of how to videos on basic porting. Takes time. The stock heads out of the box are for replacements. They run small valves and will pass state inspections. In stock form against your stock iron heads you will pickup 10-15 hp real numbers, not what is there print advertized. The weight savings is big, about 30 pounds from iron to aluminium. The big winner is from going an all iron motor to aluminium top half, you save about 110 lbs of weight. I don't know what was done to the 342 motor but there will not be that much different in performance without matching the parts to work together. If you give me both specs on your motors, I will run them on Dyno 2000 and Dynosim and tell you the differents There should be a set or numbers on the end of the cams to tell what the lobe are. They will help alot. This program is within 5% of real numbers on a ground dyno. rick l.

[wrench87]

with the 4.080 bore i can not run the big valves i have to run the 2.09 and 1.65 exaust . all the charts i see for the flow are based off the 2.19 intake valve. my 342 made 343 rwhp and 321 rear wheel tourque on a dyno jet dyno. kc said my motor should make 525 hp at the flywheel with the right heads?.