0 Members and 1 Guest are viewing this topic.
The whole thing was a generalization, applicable to just about any engine using a camshaft.
I've been looking for the stock cam specs for the 20/22R. All I have found that even comes close is a duration of 193* and .393" lift. I'm thinking the 193* duration is measured at 1mm(.040"). That would probably put the total duration @215*+/-. I would hate to think the total duration would be 193*. Anybody have info to confirm or deny this?
I think all the speculation on cams is fun, but the proof is in the seat of the pants results.
Anyway, Jim Putney knows his stuff for sure when it comes to 22r cams
Yes, I understand what you are doing there. As I said it is a generalization. Not even presenting the proper terms or any math into the mix, just starting a conversation. Feel free to introduce any info you like.
The 'works with' was not about carb or EFI, but pointing to 'working' with stock fuel and ignition systems efficiently without any further tuning, "bolt on" being a fallacy. Just bolting on a set of headers without paying attention to the fuel has been known to cause some negative issues in some cases.
I have a cam on the shelf, Schneider 250-60F, mild cam.Intake 250*(206 at .050") with .343" liftExhaust 260*(216 at .050") with .443" liftIntake opens at 15* BTDC and closes 55*ABDC , at .050" those numbers are 7* BTDC open and 33* ABDC closeExhaust opens at 64* ATDC and closes 16*ATDC , at .050" those numbers are 42*BBDC open and 6* ATDC closeOverlap is 31*My target would be a static CR of 9.7-10 to 1.
Yeah, the #s on Schneiders site are different than what I posted, but I got the posted #s off the cam card I have with the cam.
When I build my 2.6 liter 22R the cam I'm looking at is WEB cams 391 grind. Not sure how that one will work, but I'm more or less after the valve lift. The Schneider cam I mentioned before does look good, but I've heard nothing good about it, most of what I have heard is due to just throwing it in a stock engine. It's a reason I started this commentary, cams going into stock engines. Some of the cams available do a decent job, but just a little bit of extra attention to the tuning can go a long way.
We're getting a little off topic with this.
Maybe it's a waste of time, outside of one other guy, H8PVMNT, only 2 people seem to be interested in the sublect.
Should I use synthetic or dino oil?
Started by crawlin2u
Started by toyman2
General 4WD Discussion
Started by I.D.G.A.F
Started by jrock
Started by Hurricaneinmotion
Project Research and Build-Ups