I have been reading in the thread started by YARDS, and I am beginning to rethink my choice of cams because of all of the issues he is having with his build and the 413 cam. TA will be opening back up tomorrow and I am really considering changing my cam choice to the 290 08H because of the apparent issues with the 413. Is the 290 08H close enough to the 413 to not have to worry about piston to valve clearance with the KB 357 pistons with stock deck height block and heads??
When I went into round 2 with my motor, I stepped up to the 290-08h. There's an audible difference between the two. I got to drive the 413 for about 8 miles, so I cant give a real opinion on it, but I got to drive with the 290-08h for about 700 miles, I love the way it sounded in my car with the flowmasters, and it pulled pretty well through the mid range for me (my fuel pump started falling off after 4600), the truck tires i have would still squeal at 60 mph if I laid into it. I know the 290-08h is a little bit more cam than the 413, but the brakes were still ok to me. I dont know if compression affects clearance, but the 290-08h cleared my 10.25:1 pistons without any machining needed, and my block had been decked and my heads milled, how far I dont know, with .42 head gaskets i was sitting at about 9.78:1 static compression. I was real happy with that cam, only reason this time im not going with it is because I'm going to get a custom ground to maximize my engine, but Im sure it will be close to this. PS I *did* use rhoads lifters to help with the vacuum and low end, so, if you dont want to use the noisy things then I might have just wasted time for both of us.
I have to buy new lifters anyway, and if I can avoid the kind of issues I am reading about in other threads then the roads lifters are something that I would definitely have to consider. My block and heads are both stock height with the heads being cleaned up slightly when i converted them to the stage one valves a few months ago. So I will run these issues by Tim tomorrow, and see what advice he has for me. Are you running the roller rockers, or the stock 1.55's.
1.6 rollers. Now my heads apparently werent flowing what my sig says, but they are still flowing pretty damn good, and the port job on the heads was the reason I was told the 290-08h would work, how are your heads? Slightly ported as in...?
I dont have flow numbers on them, but the combustion chambers were unshrouded, ported and multi angle valve when I had the stage one valves put in. The machinist claims the heads flow 270, but like I said I don't have any of that confirmed with documentation. Ill check with the TA tomorrow and see if the 290 08 will work with the stock rockers. I have a feeling the answer is going to be no, but there has to be something else in that range because I truly don't want to have any more issues with this motor.
From following the thread about the 413 cam, I believe it wasnt decided if the cam was at fault, He's still investigating. I have the 413 in my 350, and it pulls to 6 plus grand, I have the trans set to shift at 5500 tho.
I have a GSCA custom ground cam in my 70 that just happens to be a copy of the 413 with no issues so far. Great street cam. Bob H.
I have a motor being built by Jim Weise at Tri Shield Performance. It will use the new TA Performance Hydraulic roller cam, and the grind is similar to a TA413. It is 235/242, 113 LSA, and it will have .584 lift. Jim has told me that he would like to dyno the engine with a TA413 and the roller to see the difference. As far as I know, that is what he will do. Should be interesting. I don't think there is anything wrong with the TA413.
Not really sure Bob. Not in a big hurry, it's cold and the roads are full of snow. This weekend, it got up to 50*, so I was able to get in the garage, and get some work done. I'm putting my iron heads back on with a Performer intake. Can't drive the car with all the snow and salt anyway. My plan was to have JW ship the engine to John Csordas' shop up in Chappaqua. Then I'll drive the car up there and swap engines. I just as soon do that when the weather gets warmer.
Tim, My current short block has Speed Pro Forged pistons with no valve reliefs. That limited my cam selection in light of the fact that there is also .040 off my TA heads. When I decided to go with the roller cam, I didn't want that limiting factor, so I contacted JW to do a 470 short block for me. JW convinced me to send him my aluminum heads (actually it didn't take much convincing :Brow, along with my intake, and AED carburetor as well as spare distributor, and water pump. The engine is getting a brand new TA timing cover, and SRE oil pan. I figured who better to put this all together than JW. The plan now is to put my iron heads back onto my current short block, along with the Performer intake and Q Jet. Get the car running. When JW is done with the engine, he will ship it to John Csordas's shop. I will drive the car up there and swap engines.:TU:
I ran a 413 HL in my car for years and it was good. There are currently much more modern designs available. I have been using custom grinds from Harold Brookshire in my stuff lately but here is a shelf-stock Lunati Voodoo that he designed. It will work very well for you. I highly recommend running a PAC beehive spring as well. I posted this cam on the "Bench" under the forged pistons thread as well. I still think the spherical dish piston is the way to go in these motors and if your spending the money on the rods why not get the better piston? Just my $.02 Heres the camshaft link: http://www.lunatipower.com/Product.aspx?id=1503&gid=287
BTW, The Lunati cam has 60* of overlap even with the tighter lobe seperation so it will idle a little smoother and still come up on the converter harder and have great torque. The TA 413 has 65* of overlap and the 290-08H has 75* overlap so they will not idle quite as nice and with the wider lobe seperation angle the car will feel "lazy" by comparison. Note the advertised duration of the lunati is 276*/284* vs. 286*/296* and 290*/308* for the TA cams but at .050" the Lunati is 233*/241* while the TA cams are 234*/244* and 238*/248* respectively. What that means is more area under the lift curve for the Lunai and therefore, more power for a given duration. One more thing, Harold's cams just sound better too! I'm done now.:Smarty:
Fast ramp cams? Not everyone seems to like em. See this thread--->http://www.v8buick.com/showthread.php?t=188048 I wouldn't mind trying one someday.
I would not mind trying one one day as well, but my motor is at TA now and I would never be that disrespectful to take another cam into their shop and ask them to complete the work they are doing for me with another makers cam. The reason I posted this thread was because of the issues Yards was having. I talked to Tim down at TA today and he assures me there will be no issues with my setup so TA 413 it is. If I were to ever build another motor I would not mind trying one of those cams though. He asked me today if I wanted to deck the block, and told him no, because I didn't want to raise the compression any more then it will be now. He is expecting the motor to come in at about 10.7 to 1, and that is far as I wanted, probably even a little too much. I also decided to go with the mechanical pump that TA sells and they will be doing the modifications to the pump for me.
Yards has a smoked tranny that he's going to swap out. He thinks he may have been mis-diagnosing the problem as engine related when in fact it may be "weird" shifting going on from the 1-2. He's had engine lay over problems with two engines- the first with a different cam. The first was somewhat of a "custom" grind and was different than his current 413, closer to a 288-94 IIRC. Also, recall that in his thread he had no problem at the engine dyno pulling up into high RPM ranges and that what limited the dyno RPM's was worry about hurting the engine rather than it running out of steam. In short, he has something unique going on, so I would not draw any universal conclusions about the 413 based on that thread. We'll just have to wait until he sorts it out and also look forward to Larry's dyno pull that JW is going to do.
