Recently acquired a KB MK113 cam used , inexpensive and in nice shape. I have a 71 Lesabre 455 tgats going to need rebuilt, and a ELDELBROCK intake dual plane. The fun factor is I want to build a sleeper, per-sey. Out of a 1985 Buick Lesabre Limited Collectors Edition 4 door Sedan. Yes putting the 455 in it. BRF code 200r4 transmission from a GN, ( already beefed up and upgraded) with a red stripe converter. Going with a 93 Roadmaster 8.5 rearend and the possibility of 3.42 gears. I also have 1 7/8" primaries with 3" collector headers, gasses flowing thru 2.5" dual exhaust with Flowmaster Super 44s with turndowns at the rear axle. It's curb weight is 3845# , probably close to or over 4000# with me in it. Want to know changes or upgrades i need to consider and ehat performance i can expect? It wont be a daily driver.. but like mentioned earler a kinda sleeper status car... occasionally passes down the strip or drive to car cruises or catch one off gaurd at a stop light.
Don't have any cons. I ran one in my 70 Stage 1 on the street for years. You are probably talking about the KB MK C 113. I had the Pontiac rods, B4B, headers, 1000 cfm thermo quad, 11.3:1 compression, KB 161 converter and manual reverse valve body. With 3:42 and the biggest tires I could put under it I thought it would be interesting to see what would happen if I took off in 3rd. Didn't seem to bother it at all. Just left twin tire marks for well over an 1/8th mile. I will say it did not sound stock! I weighed it without driver well over 4000#. It had every option Buick put in them including rear shoulder harnesses. Have fun!!!
No valve reliefs required if using 1.55:1 rockers and head and deck surfaces have not been milled excessively. I ran one in a otherwise stock '70 Stage 1 (no porting) with a Cloyes double roller timing set, old Speed-Pro forged pistons, shaved heads, untouched deck, 0.020" steel shim gaskets, 2800 converter, 3.73 gear, B4B, 800 Q-Jet and MT headers. Car pulled hard and revved quick to 6000 rpm. Vacuum was a little low, brake pedal felt like mashed potatoes at times, but no other issues on the street. Probably could have benefited from a little more compression, but I don't know how much. As it was, acceleration was breathtaking.
Matt68gs400. Thanks for the cam card info... Jim Jones and Ken Betts , even tho the cam is old school, sounds like your ridres were healthy and fun. Just what i want.. a fun sleeperish 4 door, that maybe runs mid to low 13s at 104 -108 mph. Maybe 12s? Still want to haul the grandkids in it and maybe drive it to the GS Nats.
Old school perhaps, but the KB Mk C113/118 cams are still, for their intended purpose, very good choices. The 113 will idle with a noticeable lope, it may not be considered a sleeper cam. I still own the motor that is described in my above post. It is original to, and will be going back in, my '70 Stage 1 4 speed car once restored. This engine was rebuilt in the 1980's and installed in my GSX for a short time, but when I sold the 4-speed car (which I recently got back - long story) the engine went with it. Sadly I was never able to get a time and mph on the X with that engine in it, but stop-watch timed it was sub 12.5 e.t. Should be fun in a 3 pedal car.
Great cam. Got one in 71 convertible, rougher idle than 118 but makes good sound a bit like the "window rattler" 107 but not that extreme! Power band is more narrow than 118 but in the power band I believe it makes more power. Revs to 6000 no problem. I have it with 8.5 comp and uncut ported heads with .030 steel shim gaskets. Vacuum is on the edge for power brakes but I run manual.....
I had what I believe was a KB B70 S1 cam in the Pop Kennedy 72 Stage 1 NHRA record holder car I purchased from him ( I think maybe Dave Benisek was part of the deal) It ran 12.42 at 108. That could possibly be the same or close to the KB MK C 113 cam. If anyone has a KB catalog from the early to mid 70's they could post differences if any. You would think I would know that after running KB from 1975-1981. We sold a lot of those cams. However I put the KB MK C 107 in that car, I can tell you there is a big difference. If you want to run incognito, do not let anyone talk you into a 107. With the 113 everyone will know its not stock. I had both cars at the same time. Unmistakable difference!
Hey ken, when I bought my 70 stage 1 back in 1983 it had Kb Jahns 10 an haft to1 forged pistons, edelbrock B4b, carter CS 1000 Tq, 3000 stall converter, 430 gears an the KB B70S1 cam it also had rhoads lifters. I have the cam card, the specs are almost indentical to the KB 107 it ran 12.60 at 106 mph. I believe it was the first version of the 107 cam when I lost the cam bearings in that motor I rebuilt it with the 107 474 lift version it ran the same. I found a set of factory iron stage 2 heads unported with custom headers she when from 12.60 at 106 mph to 11.80 at 111 at that point she started to running out of fuel an cam.
I had a MK C113 in my 66 skylark, it was fast and fun and would light the tires up at 25 mph roll, I ruined a distributor gear on the cam so I decided to try the C118 and it was lazier than the C113 and not nearly as fun so I ordered another C113 and swapped it back. that car weighed 3950 , had 3.36 gears and a switch pitch and ran 12.21 @107 like clockwork
Thanks for the replies guys.. sounds likeit will be a fun car to drive... A nice lope i can handle... Would 3.42s be ok in the gearing ? Want to run 255/60/15 in all four corners, or should I run a a taller tire like a 275/60/15 for the rears only?
Chris, even at the weight of a big car, I think 3:42 gears are the best all around street gear for a mild motor. I eventually switched to 3:90's and was not happy with them. The converter was about 2600 stall speed. I sold the car to my brother and had to rely on my race car for the street. With the 12" M&H's I could pull the front tires off the ground. It had the 4:78 rear gears so getting away from stop lights was easy. Too bad for the Hemi's 427 & 454 Chevelle's, and my buddies 428 CJ, while they all went up in smoke I was nearing the finish line. I was just fortunate I never ran into some one with slicks!
