My bottom end is done and it won't change so new pistons or a stroker isn't going to happen unfortunately, but if I manage to find a thinner head gasket I will absolutely be getting it to get the pistons a little closer to the combustion chambers. I did read the 300-340 stroker article a few weeks ago and I think its something I'd like to try when I do another 300. Have you ever went with Schneider for custom cam grinds? Someone else who got a custom cam for their SBB recommended them to me so I was originally planning on using their service.
I think we had a better combo with Chris's 300 stroker on the MGexperience website. Ian has it now and it's running better than ever for the last 8 years. Try this compression calculator: Compression Calculator (diamondracing.net)
108 LSA power band is usually around 1500- 5000RPM. 112 usually around 2000-6000RPM, 210 duation @.050. Cam advanced 4 degrees moves power band down about 500RPM. Retarding 4 degrees moves power band up around 500RPM. Advancing also raises Dynamic compression and retarding lowers Dynamic compression. Advancing moves intake valve closer to the piston, retarding moves exhaust valve closer to the piston. Just more to consider.
This is a lot of good info, I'm noting all this down. Are the 4 degree cam movements correlating to ~500RPM changes specific to these small blocks or is that more of a general rule?
General, It helps a little for Dynamic compression. You will have snappy throttle responce with the small ports and valves of the Rover heads.
i like comp cams the best as you can see lol. had a few more comp cams but never use to save the cam cards. only had one Schneider. 3 bullet, 2 Crower, 4 Hughes engines, 2 Crane, 3 Lunati, 2 Racer brown, 3 mopar direct connection. am sure i forgot a few.
I've used most of the big names and liked the old Comp Cams High Energy series. The new Xtreme Energy are a little noisy. Crowers I like best for the small Buick V8's. I Loved the Lunati for the V6's. Last I heard Schneider was grinding the TA cams.
i think TA went with Crower they use to use Schneider. Schneider did grind some custom cams for engine masters TV show
The stroker 300 is getting to be somewhat popular, I have two of them on stands in my shop right now, both with ex-nascar rods, Wiseco pistons, and roller cams from TA. One has TA-Rover heads and we'll go shopping for another set as soon as more funding comes in. Great way to build a 5.7L engine with 6.2" rods. The cam we selected was a grind suggested by Jim N., one is hydraulic and the other solid. .520/.530, 220/230@.050" and 112, should be a decent street cam. Wasn't looking for anything radical. Jim
I am watching this thread close. My 340 build is at the machine shop now. Mine will be completely stock but I figured there was something to be gained with a new cam while maintaining stock like street manners.
read these books from 1987 and maybe before that. some guy's still want to use these camshafts. they have the same design and exact same spec's and part numbers back then as they today at least 36 years later. yes cam designs that are more than 36 years old. leaving any where from 15-25 hp and tq on the table.
But looking at Comp's catalog and they don't even have listings for the 300-340! (and nothing but Thumpers for the Nailheads). Is there someone at Comp that knows the 300-340 well, or do you specify your own? I'd like to replace the cam in my '66 Special w/ 300, 64 4bbl intake and 5 speed. Nothing radical, just a fun street car, along the lines of the Crower 50229-230. Thinking a 209-210 lobe center would still work well with power brakes?
Walt they don't really know at comp about 300-340. these are custom grind . all depends on how much lift you can use so here is a choice. on intake 206* at .050 duration with 461 lift lobe #5440 or 206* with 443 lift lobe #5430 both with 250 advertise duration... and for exhaust 212* at .050 with 474 lift lobe #5207 or 212* at .050 with 448 lift lobe #5205 with 260 advertise duration. I like it on 109 LSA with 4* built in advance. they do have 196* duration 440 lift lobe#5437 i think it is on the small side.. on a 340 i ran a 212-218 duration it was very good
Harold Brookshire, the man behind the Comp Cams High Energy, Lunati Voodoo and last ran Ultradyne cams and started Bullet cams. The genius behind most modern cam designs. Passed away 2014, RIP. Here is a compilation of a bunch of his thoughts, The Chevelle forum has lots more of his ideas on cams: some of harold brookshire cam thoughts compiled - Cleveland's Forever (tapatalk.com) Search results for query: harold brookshire | Team Chevelle (chevelles.com)
yes it does, so does more or less duration, so does advancing or retarding the cam, so does lowing or raising your compression ratio. I don't understand your point ? unless your trying to say because you have a tighter lower LSA your car will just ping and knock.
No particular point. Just reading through some of Harold's comments and remembered I forgot to mention it before for those that don't know. With today's gas it is a balancing act and I would target 8 to 1 Dynamic compression to prevent pinging. I've stressed it enough.
