Well if TA roller rockers may not work, the stock aluminum or stamped steel definitely won't work either.
Are you guessing hp using stock iron with big valves, ported iron with big valves or the new aluminum heads?
I used the similar flowing T/A Rover heads compared to the 300 Aluminum heads in Chris's 300 Stroker. T/A heads I put 1.94/1.60 valve size. 300 Aluminum 1.74/1.5 valve size. 10.2 compression.
I think that will be a huge deal killer on these heads. Sure, a few guys want super duper "no expense spared heads" for their 350, but tons of guys want a good option for their stockers/modifieds. Adding the cost of prolly a grand for these new rocker set ups will halt most buyers imo. Even 600 will scare most folks off.
I agree... we will have to wait and see what they come out with and go from there... I wouldn’t mind buying another set of roller rockers if it meant a better designed head and room for bigger valves... I’m not saying the current rollers won’t work, just that mike sr was discussing making some modified versions of the rollers. We will see. One thing is forsure it is going to bolt up to the current headers and intakes so that’s the major thing there.
Either of those prices would take months to save up, on top of the heads. If these really supposed to be "bolt on", I expect all factory mounting holes, valve covers, and rockers to bolt on with no issues. If not, I'll just stick with my irons. Basically 3k for the heads, 500 for a set of headers that I'll probably have to beat up to fit in my car that also hang too low, and 600-1000 for some rockers? I may sound a bit whiny here, but if that's the case I won't be purchasing a set.
There's nothing saying that they can't have multiple styles of 350 head, one that is a true bolt on, rockers, valve covers, factory mounting holes, etc, and one with the different valve angle and what not, and with the necessary modifications to have the different rockers. They have what... 4 or 5 different "levels" of head for the 455, why not the 350? I first and foremost would be 100% focusing on a ready to go bolt on head and go up from there so at least something for the SBB headwise is on the market and is accessible for the average Joe.
I was guessing that 400 number with the aluminum heads. That same build with stock untouched iron heads like I have would be lucky to break 300.
The amount of time and money it takes to make changes to a mold is not cheap and or easy from what I'm told. If that was the case we would have an SPX intake for the TE heads, but we don't. I wouldn't expect multiple 350 heads the market is barely there for aluminum heads at all let alone a "stock" geometry and an improved geometry head. If your truly serious about 350 performance you will buy what's needed. Not trying to be a Richard or anything just saying,...there is a huge opportunity for 350 guys to step up and build a NASTY small block the cid options are pretty well figured out, the intake is there for decent hp support. If you wanna fly the 350 banner high,.. long poles to do so are expensive
I would hope that we could just modify the rollers rockers we already have. After already spending almost $1000 on a set of rockers, thats a purchase I dont want to make again. Especially since I already have them.
Cram a 2 inch intake valve in it, get a Scott Brown custom cam for a fat low and mid range, run exhaust manifolds. 10.5 compression paint heads same color as block. Make everyone think it’s stock.
I'm thinking about something like that & even a spacer to run stock valve covers. Being that stock exhaust manifods are restrictive (anyone tried porting or extrude hone?) and when the time comes I'll start a separate thread to gauge interest, but I'm thinking about 350 shorty headers.
We are lucky to even get 1 set of aluminum heads let alone several sets. They will bolt on without any problems. I have the large TA headers on my car and there are no dents in them and I did not have to bang on them to make them fit. I can't see having to buy new RR's to get the fit on the new heads, you are now talking 3800$ just to get everything bought. But thit happens and that may be the way it is for the new heads. If this is the case they might as well be made for the racer in mind and forget about the stock stuff. Besides, who is really going to do this with stock parts, I mean really? With the intake and the heads the thing is going to spin to 6800 anyways so the rest of the parts on the bottom are going to have to be better also. Starting with the rods, pistons, and crank. The crank will probably handle it but what about the rest. But then again I have spun mine to 6400 a bunch of times with all the old school stuff, forged pistons, 73 caps crew rods, balanced assembly, TA 510 cam. You really want to run these heads get ready for a complete overhaul of the engine. If it was me. Stop worrying, be done with it and just spend the money and watch the jaws drop on those Chevy and Ford boys when you just put a wippen on them.
that wont help sales volume, if a guy can use his stock configuration rockers he's more likely to buy the heads but if he's gotta buy another set of rockers at $900 he may decide on a 455 instead.
The 455 is no cheaper you still have to buy the same parts for it. I cannot see having to use something different or special to put the Alum heads on a 350 motor, Unless the valve train is going to be made up of Chevy rockers which will be cheaper at this point. I bet all we have to do is just shim our existing RR's to put the system on. The valves are not going to be that much further out they barely fit in there as it is. Do you really think TA is now going to retool and remake RR's to fit the 350 motor after waiting over 10 years to even get some real heads made? That would not work right. and if you ding dongs out there talked TA into doing this you sure as heck better be buying those heads after making all those suggestions over the last 10 years.
I would rather have this style of rockers; https://www.ebay.com/itm/Chevy-Sbc-350-1-6-Stainless-Steel-Shaft-Mount-Roller-Rocker-Arm-Set-100-Offset/351752576543?ssPageName=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649 Especially for that price! TA could have these made in quantity for probably $50 - $75 a set and just include them with the heads for about $100 more? IIRC the sbb valve to pushrod is around an .080" offset already, if the valves are spread out about .030" each valve would make them .110" offset which the .100" offset rocker in the link would work. The bases and shafts would need to be made sbb specific AND both sides would need to be offset though. Without spreading the valves apart IIRC the maximum valve size would only be 1.94" intake and 1.560" exhaust! I don't care what anyone says, IMO those sizes are to small to get 300 + CFM of intake flow and to small to get 75% ex. of 225 + CFM? Spreading each valve .030" should be enough to stuff in 2.02" intake valves and 1.60" exhaust. If TA uses 5/16" or 8mm valves, their roller rockers' roller would still cover the valve tips with no other mods because they would be just over .030" per side smaller in diameter. So TA CAN spread the valves out IF they use smaller diameter stems like the LS heads already use and still be able to use the same roller rockers. The 3/8" valves from the factory are ridiculous anyway, totally unnecessarily heavy, might as well put performance valves in performance heads! The valves should probably be tilted to change the factory angle as well to make them closer to the centerline to help unshroud them as well, especially if they're spread out. By changing the angle the tips can stay basically in the same location to maintain the same distance from the rocker's shaft centerline for the roller rockers they already have.
