Serious Cams

hoffbug · December 28, 2009, 06:47:03 PM

. started new thread..

BlownMGB-V8 · December 28, 2009, 10:12:38 PM

The Buick boys are doing this and I don't remember the details but I do recall it is a trade off of induction against engine harmonics. The guys who are doing it are 350 builders IIRC and they already have a different intake configuration, so how it would work out for the BOPR I'm not sure. My personal impression is it's along the lines of the flat crank four cylinders. Might be good for racing but probably not that productive on a street engine.

Jim

roverman · December 28, 2009, 10:15:23 PM

Tony, tough question. I think I would start by weighing stock pistons/rods. My forged, +.03 os. 305 sbc pistons/pins are approx 447 grams before re-notching for stg.1, V6 valves. 1k hp., 4340x6",lg jrnl. rods are 599 before narrowing.Isn't the 4.6L crank internal? Anybody? If so, It might may a better option, regarding flywheels, fillet potential during off-set grinding, 1 pc. rear seal and ready for crank driven oil pump. roverman.

mgb260 · December 28, 2009, 11:17:04 PM

351 Ford and 302 roller HO firing order was changed for the same reasons. Helps if you have large diameter mains or turn high RPMs.Scheinder cams E-mailed back and said cast iron was wrong material for even hydraulic rollers,even if hardened. The factory cast cams are steel alloy. I imagine Comp cams or other aftermarket retro roller cams are also, thus more expensive blanks. I guess there is no cheaper way to do it. Iv'e looked at chilled Iron(when they pour molten steel into a cold mold) and cryogenic treating. By the time you do all the custom stuff you would be better off ordering an expensive steel billet. I would still like a cast cam gear on it though.

roverman · December 29, 2009, 12:33:32 PM

1961 on had cast gear. I never suggested anything other than #8620 for cam,(publicly). For variable cam drive, I believe crank trigger ign. will prove best. I think volume price of $250 for custom 8620 billet will be tough to beat. I'll be using oem. V6 roller lifters in the "Huff" as mechanicals. Should be good durability test.roverman.

mgb260 · January 03, 2010, 05:20:22 PM

Paul, You are being awfully quiet. You aren't getting secretive like Mike are you? Any progress on the spyder?

pcmenten · January 03, 2010, 06:47:18 PM

Jim, I got busy with my 54 F100. I recently got the engine back in it and I've been thrashing the fuel system to fix a problem there. I think I got that fixed today. Next will be the leaking heater core. Then get the windshield wipers working, then ...

I've been scanning the local Craigslist, looking for a Buick 3.8 that being parted out. Nothing so far. But I did find some 16" wheels for the F100.

roverman · January 03, 2010, 08:24:15 PM

Paul, as in Buick 3.8, V6 ? Your abandoning your V8 bretheren ? PS., I have 56' F100/440 Mopar.

pcmenten · January 03, 2010, 11:28:17 PM

Art, Nah, I'm going to splice two V6's to make a better V8. 440/F100? Welcome to the Dark Side. Nice choice of bodies, but I'll bet you had to box the frame. I've got the parts to swap in a Cordoba front suspension, but I'll probably stick to a Ford for power.

roverman · January 03, 2010, 11:35:50 PM

Box the frame? I'll "wrestle" with that later. It's comming back as a 40 yr.backburner.Eventually to get a "W16",(Rover of-course), in the bed. I was force-fed Mopars as a kid, hence the B-block.

roverman · January 03, 2010, 11:42:37 PM

Box the frame? I'll "wrestle" with that later. It's comming back as a 40 yr.backburner.Eventually to get a "W16",(Rover of-course), in the bed. I was force-fed Mopars as a kid, hence the B-block.

BlownMGB-V8 · January 04, 2010, 08:37:15 AM

Art, why not one of those Chrysler tank motors? I heard they made pretty good power..

Jim

roverman · January 04, 2010, 11:13:33 AM

Jim, If Nic can have a 4X4 caddy and Mike can have a top secret- 4.02" then I can have a W16 Rover, I want it,I want it ! roverbrat.

BlownMGB-V8 · January 04, 2010, 05:32:06 PM

Yeah, but weren't those something like 3 or 4 Mopar V8's all jammed together or something? Bet that'd have enough tork for yer truck.

Jim

roverman · January 04, 2010, 06:24:17 PM

Don't want,"torked-out-o'-shape", me want, "Rotus Brosom Sweet 16", kinda like, astro-glide for the hi-way.

roverman · January 11, 2010, 09:01:24 PM

Update, it's a new year, let's get it in gear! 1,677 "peeps" on this subject and (3)? ,people have said their interested?? Howard Cams is "workin a quote" for qty. 10 and 25 billet rollers. If I get enough positive feed-back from "this" forum, I may jump-start this. 215-340 and "noseless"-only. 350 sbb. folks already have rollers from TA ,and TA hasn't responded for this application.We know all about the low cost, other components , we're running out of excuses not to. Stay tuned, it will get-"bumpy". roverman.

NixVegaGT · January 12, 2010, 10:56:17 AM

I'll commit to one if we can get the price reasonable.

roverman · January 12, 2010, 08:27:01 PM

Update, Under $300. ea. based on qty. 25 in a run, "noseless" are less. All will accept retainer plate. How bout "bolt-on", a distributor gear/spacer, onto "noseless" cam, for those who want dizzy? Let's get "bumpy". roverman.

BlownMGB-V8 · January 13, 2010, 01:15:29 AM

Looks like TA is making a little progress in that area, as Mike Jr says they are waiting on a Rover roller cam to test and if it checks out they will order.

Jim

roverman · January 13, 2010, 10:41:12 AM

I have (3) in stock, but I "loaned" MikeSr. a stg. II V6 billet roller, about a year ago- no word. Much as I'd like to help..........

roverman · January 13, 2010, 10:42:32 AM

I have (3) in stock, but I "loaned" MikeSr. a stg. II V6 billet roller, about a year ago- no word. Much as I'd like to help..........

roverman · January 14, 2010, 01:26:55 PM

Update. written quote, Flanged, finished complete,(5) in a run= $355. ea. No flange, finished complete, (25) in a run=$295. ea.

NixVegaGT · January 15, 2010, 05:20:08 PM

Not bad. Let me know when we order.

pcmenten · January 15, 2010, 07:52:21 PM

By flanged, I assume (making an ass of me and u) that you mean the cam has the distributor drive extension hanging off of the front of the cam. True?

I'll have to raise some money to buy some cams. I'm going to try to help get the volume up enough to get a full order. I'll sell the extras.

Are these cams finish ground to specification? Will they be surface treated after grinding? Is it safe to assume (there's that word again) these will be compatible with those nice, new, Delphi V6 roller lifters that we buy off of eBay?

I'll get in touch with Art via PM when I have raised the funds.

roverman · January 15, 2010, 08:19:25 PM

Paul, you know of an "inflection" occuring in oem, Rover head flow? I believe by lifting valve faster and more lift will keep the valve in the "sweet spot"/flow under the curve-longer? I'm not convinced that what works great in a sbf. will in a Rover. The more we lift the valves, the more they are unshrouded from chamber and cylinder walls,(their not centered in chambers). Clan, yes, when I say "flanged" = identicle to 215-340 Buick, oddfire V6 Buick and RV8's with distributors, BUT will accept RV8 retainer plate! I will make at least (1) to take sbc(3) bolt drive for belt. I don't "trust" that little notch in"noseless" cam for serious work. We will need "exact" lobe lift and LSA., and lift per deg. of cam rotation,(we're not limited to .007"/deg. now), for rough and finish grind. Finish grind will be .005"-.010" removal per side, occurs after carburizing to depth of .040". This should be adequate depth for hyd. rollers and mech.'s excepting RV8's in TF/TA drags? roverman.