Did you find that the 413 idles better than the 113A or vvs? What else was different? Did one have more vacuum than the other? These two cams seem very similar on paper and the computer simulation.
The car seems very similar. Idle is almost identical @ 900 rpms. I never checked the vacumn on it so I can't tell you the exact numbers, but it does have very good brakes. The only difference I could feel was on a burnout. The 413 would burn my peg leg for a mile seems like. I tried tweaking the 113a, but never got the same burnout from it. All my components were identical to the first setup with the 413. The same car also. I had noted many dyno tests stating the 2 were dead even in output and decided to go with Poston's cam simply because it would arrive faster to where I live. I do like the company, and the car will run good, but just a tiny bit slower than before.
Great clips Alan, Great looking and sounding car. My son and I really liked the videos. We're stationed overseas so old school American muscle is NEVER around for us to enjoy and my '70 Skylark is in storage. What color is your car? I'm planning on finishing mine in the Fire Red but am open to close colors.
Hi Jim Glad I could give you and yours a Slice of Old School USA to enjoy over there :beer :TU: Mine is not a stock color - If I remember correctly it was an 87-ish GMC Truck color called Mexican Red o No: For years I HATED how the red in the emblems (especially the "400" hood emblems on 69's) clashed with the much deeper red the car used to wear. I told the bodyshop to get me as close to the color in the emblems without making it look orange. Its very bright and doesn't look orange'ish until sitting next to a true RED car.....its grown on me over the years. Back on topic....isn't the 113 and 413 basically the same except for the lift being slightly higher ?? that would prolly explain similar idle "note"
John, I had Phil do a little Desktop Dyno magic and he came up with 467hp @ 5500 and 483tq @ 4500. I read just about every post on cams on v8buick before decided to go with it. I figured the wider centerline would play nicer with the lower compression. I think JW has around 10.3:1 on his motor with this cam. I don't imagine I have over 9:1. I advanced it 6 degrees after reading JW's post about when he'd run it 4 and when he'd run it 8. If it turns out to be close to what Phil's DD spit out, then I probably should have went 8. With stock bottom end, I don't want to spin it too much and low end torque is fun.
JW knows Buick motors. However, I ran the 413 most of this year in my GS with a 278 rear and it screamed. I am sure a 342 would have ran better, but I didn't have it installed at the time. With a 2900 stall, there was no way it would hook up on take off! Smoke everywhere, then your finally gone. Top end was awesome for a street car of its age. I would try the one you have since you have it. Who knows, you may not want to spring for another cam after feeling the power. :3gears:
I am running the 413 cam with about 9.6:1 (1970 specs) compression. I am still tweaking my motor and doing different stuff everyday, as this motor only has about 200 miles on it. I am making things better everyday with figuring things out of my problems. I currently have a pegleg 2.56 rear with 255/60R15's, and think the low end torque is pretty strong. It definately pulls hard all the way through the RPM range. When going slow in 1st, around 10 MPH, it will lift the front end up drastically when throttled. I have a 3.90 posi in the garage that I decided to bolt in within the next few days or so. I am excited to feel the motor with that gear setup. I did not want that tall of a gear, but have not been able to find a decent deal of a 3.42 posi/gear combo. Just wanted to pipe in my $.02 Mike
Mike, You can tame that 3.90 gear with taller tire sizes. Examples of Radial TA sizes: 1) 255/60-15: 27.1" tall x 8.2" tread width 2) 255/70-15: 28.9" tall x 7.6" tread width 3) 275/60-15: 28.0" tall x 8.9" tread width 4) 285/70-15: 30.8" tall x 8.5" tread width RPM @ 60 MPH 1) ~1955 (current 2.56 gear) 1) ~2612 (desired 3.42's) 1) ~2979 (3.90) 2) ~2793 (3.90) 3) ~2883 (3.90) 4) ~2621 (3.90) So you can see that by changing to the 285/70's and the 3.90 gears you'll be running about the same cruise rpm as yo would with your current rear tires and a 3.42 gear. Plus, you'll really fill up those wheel wells! BFG recommends a 7.5" minimum rim width for that tire and they used an 8.5" to get the tread and section width measurements. The 255/70's would be the next lowest cruise rpm and would fit on a 15x7 rim. They do give up a little bit of tread width though. But when it comes down to it, you're not hooking any street tire up with 3.90's in that thing! :TU:
Steve, Thanks for the tire inputs... I have 2 extra rims that I could have widened, but will the 285/70 fit if I get the rims widened to 8.5" ? And where can I get that done at? And the cost? It is all up in the air right now for just about everything. I checked my camera for video and sound, and it only has video. I would like to post a sound clip of mine if I had the means... :beer Mike
Mike, The 285's were measured using an 8.5" rim. But BFG shows the range of recommended rim to be between 7.5" and 10". You could get yours widened as I think others have, or order some from one of the aftermarket companies that repro them. A little searching should find a bunch of info on either method. My Nikon 995 only has video too. I'll probably use one of my mp3 players to record sound only although it'll only be as good as the microphone.
POODS, What intake manifold were you running with the 413? I have read elsewhere that it does not work well with dual plane intake manifolds.
My engine: Stock 70 bottom end 9 key-way chain (cam dialed in @ 110) 70 stage 1 heads w/ smoothed radius, 3 angle job, dual springs and matched ports TA pump cover with regulator and plate TA shorty headers w/ 2.5" X-pipe system Edlebrock performer intake port matched Built 71 Stage 1 Q-Jet carb Stage 1 fuel pump Mine seemed to run well with the intake. A B4B would probably be a little better. A single plane would have been more than I needed for a moderate street engine.
I just got the car home. My mp3 player has dead batteries, so I'll have to freshen them up. I wish I had a digital video camera to make things more interesting. It was a pretty boring drive thankfully. My speedo gear setup is about half off. 30 mph on the speedo is about 60 mph. With the 2.56 gears, the converter does some noticeable slipping. At about 60 mph, under load it's spinning around 2400 rpm. The minute I go into coast at the same speed, it drops down to about 1800-1900 rpm. That's all in the converter. Me needs gears (and a posi)!
OK, I recorded about 30 seconds of idling with the 288-96h cam. I sent it to Alan to host, like he mentioned earlier. Once he gets that set up, I figured I'd just start a new thread with that clip (explaining what exactly you're hearing).
Here is Steve's motor idling....and a few blips. Cam is 288-96H Steve.....where's the 4K revs ?? :Brow: uzzled: ou: http://itnmedia.com/alan/cam28896h.mp3
