Айде и малко инфо за lift/duration на ОЕМ и Афтърмаркет валове:
1. ITR/CTR (Chilled Cast Cores)
http://tech.hybridgarage.com/tech/bseries.html (първоначално тази информация е взета от сайта на Frank Lin's - gspeed.com)
- STOCK 1997-1999 ITR ($500-580/pr, ITR intake cam $250-290)
INTAKE lift - 11.5 mm, duration 240 @1mm
EXHAUST lift - 10.5mm, duration 235 @1mm
- STOCK CTR and 2000-2001 ITR (CTR intake cam $300-350)
INTAKE lift - 11.5 mm, duration 243 @1mm
EXHAUST lift - 10.5mm, duration 235 @1mm
AFTERMARKET CAMS (Подредени по азбучен ред)
2. Blox (no @1mm specs available)
( MSRP $750 US/pr for Tuner Series not Competition Series, Chill Cast Cores )
http://www.wicked-industries.com
- Type A , Tuner Series($450-535 US / pr)
INTAKE lift - 11.7 mm, duration 247 @ 0.05 in.
EXHAUST lift - 10.7mm, duration 239 @0.05 in.
- Type B, Tuner Series ($450-540 US /pr)
INTAKE lift - 12.4 mm, duration 266 @0.05 in.
EXHAUST lift - 12.0 mm, duration 266 @0.05 in.
- Type HSL, Competition Series ($510-570 US /pr)
INTAKE lift - 12.6 mm, duration 255 @0.05 in.
EXHAUST lift - 12.5 mm, duration 256 @0.05 in.
Характеристиките на валовете от Тунер серията Type HSL или Turbo не са налични, както и тези за Competition Series Type B , 10124 Race, или Turbo.
3. Buddy Club
- Spec 3 Plus ($549 US / pr)
INTAKE lift - 11.2 mm, duration 250 @1mm
EXHAUST lift - 11.5mm, duration 245 @1mm
- Spec 4 ($600 US /pr)
INTAKE lift - 12.3 mm, duration 269 @1mm
EXHAUST lift - 11.8 mm, duration 274 @1mm
4. Cat from Europe ($485 US / pr)
Тези спортни vtec валове са направени от 2501606 сплав, а произхода им е Европейски – марката CAT произвежда валове за някои от отборите в Honda British Touring Car шампионата. Наложително е използването на Vtec/горивен регулатор, като Apexi VAFC за да бъде настроен добре празният ход. Имат агресивна извивка на гърбицата и по-агресивни нон-витек гърбици, въпреки относително умерените характеристики на Vtec гърбицата.
http://www.jrponline.com/
INTAKE lift - 11.1 mm, duration 242 @1mm
EXHAUST lift - 10.32mm, duration 240 @1mm
5. Crane Standard Tappet & Race Only Roller Follower Cams
The specs listed on the Crane Cams website are at 0.05 in. valve lift. Thanks to Dave Maxwell at Crane for forwarding the duration @1mm valve lift specs for the Stage 1 cams.
http://www.cranecams.com/import/avteccams.htm
- Stage 1 (part no. 2530010 - $773.33/pr)
INTAKE lift- 11.6 mm, duration 243 @ 1mm
EXHAUST lift - 10.8mm, duration 237 @ 1mm
- Stage 2 (part no. 2530012)
INTAKE lift- 11.99 mm, duration 248 @ 0.05 in.
EXHAUST lift - 11.6 mm, duration 242 @0.05 in.
- Stage 3 (part no. 2530016)
INTAKE lift- 12.39 mm, duration 254 @ 0.05 in.
EXHAUST lift - 11.99 mm, duration 248 @ 0.05 in.
- Crane/Ferrea Roller Cams (part no. 2530514 $629/pr but must also purchase Crane/Ferrea Roller Followers Set price - unknown. See comments below about using roller cams and standard rockers or followers)
http://www.ferrea.com/Import_Cars_/import_cars_.html
Crane/Ferrea Roller Followers Should Not Be Used With Standard Follower Cams (Here's Why):
quote: Larry Widmer at Endyn
All cams designed to work with Honda rocker arms utilize almost the full length of the rocker pad. This causes the effective rocker arm ratio to vary as the cam acts across the span of the pad. If you hold a Honda rocker arm so you can look at it from the side (looking through the shaft axis), you'll notice that there's an "arc" or radius to the rocker pad's configuration. This radius is quite large, so imagine the diameter of the circle it would be part of, were it extended. I haven't measured it, but the circle would be quite large ...something on the order of 2.5" or so.
In order to have the same valve action (as with the Honda rockers) from a Honda "type" camshaft, the radius of the roller in the rocker arm would have to be that same (large) diameter. Since there's no room for a roller that's that large, not to mention that the mass would be "extreme", any roller rocker arm that has a roller that's smaller can not provide the same valve action. This means that anytime you use the roller rocker on a cam ground for Honda rockers, you won't achieve as much area under the valve lift curve and the opening / closing rates will also be slowed considerably. Bottom line is that you will not make as much power with these roller rockers, as you would with the Honda rockers.
6. Crower VTEC Cams (Chilled Cast Cores)
http://www.crower.com/
Here are the cam durations @ 1mm valve lift which are not on the Crower website. Thanks to Brian Crower for providing these.According to Brian the reason why he did not provide the duration @ 1mm:
"The Toda advertised specs are at .0143", so that's why we adopted that number as our advertised number." All cams $642/pr.
- 63402's have the same lift but lopier idle and bigger intake duration than the 63402A :
INTAKE lift - 11.83 mm, duration 237 @1mm
EXHAUST lift - 11.81 mm, duration 228 @1mm
- 63403
INTAKE lift - 11.98 mm, duration 246 @1mm
EXHAUST lift - 11.83 mm, duration 238 @1mm
- 63412 N/A Race Core Cams
INTAKE lift - 11.84 mm,duration - (estimated) 260 @1 mm
EXHAUST lift - 11.81 mm, duration - (estimated) 252 @1 mm
- 63413 N/A Race Core Cams
INTAKE lift - 11.99 mm,duration - (estimated) 269 @1 mm
EXHAUST lift - 11.84 mm, duration - (estimated) 258 @1 mm
- 63411T Turbo Race Core Cams
INTAKE lift - 11.81 mm,duration - (estimated) 242 @1 mm
EXHAUST lift - 11.30 mm, duration - (estimated) 238 @1 mm
7. Dan Paramore
http://www.dprracing.com/pages/products/cams.htm
Dan Paramore did not get back to me to provide the duration @1mm lift specs when I had requested them. The intake ABDC closing spec is 52 degrees.
307 Cam (Race Only, $649/pr)
INTAKE lift - 12.07 mm, duration 248 @0.05 in.
EXHAUST lift - 12.07 mm, duration 248 @0.05 in.
8. Jun
Here is Jun's website:
http://www.junauto.co.jp/products/cy...B16A/B16B/B18C
Here are their max. lift and duration 1mm valve lift specs for the VTEC lobes :
- Type 1
INTAKE lift - 10.9 mm, duration 265 @ 1mm
EXHAUST lift - 10.0 mm, duration 268 @ 1mm
- Type 2
INTAKE lift - 12.0 mm, duration 267 @ 1mm
EXHAUST lift - 10.9 mm, duration 265 @ 1mm
- Type 3 ($890/pr)
INTAKE lift - 12.0 mm, duration 265 @ 1mm (Advertised 304)
EXHAUST lift - 11.5 mm, duration 265 @ 1mm (Advertised 304)
- Type 4($??/pr)
INTAKE lift - 12.5 mm, duration 265 @ 1mm (Advertised 304)
EXHAUST lift - 12.5 mm, duration 265 @ 1mm (Advertised 304)
Jun Type 3's have the reputation of eating valves if you milled the head, advanced cam gear timing more than 3 degrees, use oversized stainless valves, or use non-Jun or non-Toda valvesprings.
9. Piper
Here is Piper's website:
http://www.pipercams.co.uk
- BP285
INTAKE lift - 11.6 mm, duration 256 @ 1mm
EXHAUST lift - 11.2 mm, duration 256 @ 1mm
10. Rocket Motorsports (formerly Hondasaver, formerly EF-1)
thanks goes to Tom (aka Tbone) for emailing me the @1mm duration specs. ($750/pr or $990 with RM valvesprings as a kit). These cam lobes come Parkerized coated.
http://www.m24x.com/
M20 and M21 specs (11.5-11.6 lift 274 advertised duration) not listed since we don't have their @1mm duration specs but are much less aggressive than M22's. M22 (street N/A)
INTAKE lift - 12.1 mm, duration 244 @ 1mm
EXHAUST lift - 12.1 mm, duration 244 @ 1mm
M23 (no longer available)
INTAKE lift - 12.1 mm, duration 252 @ 1mm
EXHAUST lift - 12.1 mm, duration 252 @ 1mm
M24 plain (no longer available)
INTAKE lift - 12.1 mm, duration 258 @ 1mm
EXHAUST lift - 12.1 mm, duration 258 @ 1mm
M24E
INTAKE lift - 12.7 mm, duration 263 @ 1mm
EXHAUST lift - 12.7 mm, duration 263 @ 1mm
M24X
INTAKE lift - 12.7 mm, duration 258 @ 1mm
EXHAUST lift - 12.1 mm, duration 265 @ 1mm
M25
INTAKE lift - 12.1 mm, duration 270 @ 1mm
EXHAUST lift - 12.1 mm, duration 270 @ 1mm
M25E
INTAKE lift - 13.25 mm, duration 276 @ 1mm
EXHAUST lift - 13.25 mm, duration 276 @ 1mm
MXX
Propriety Specs for Contracted Race Teams.
X denotes 1 large nonVTEC lobe resulting in staggering like the stock nonVTEC lobes layout for swirl filling and good emissions/idle quality. XX denotes 2 large nonVTEC lobes unstaggered like the Toda cams' nonVTEC lobes.
11. Skunk2 (Chilled Cast Cores)
www.skunk2.com now have the specs available. At the time of writing this article, they did not have the specs listed and I had emailed them via info@skunk2.com. Here are the specs provided by Dave Hsu at Skunk2 to me:
- Stage I (best price $712.50/pr, retail $797/pr, CARB Exempt pending)
INTAKE lift- 11.58 mm, duration 252 @ 1mm
EXHAUST lift - 10.8 mm, duration 249 @1mm
- Pro I+ for B series
INTAKE lift- 12.6 mm, duration 264 @ 1mm
EXHAUST lift - 11.9 mm, duration 264 @ 1mm
- Stage II (Not CARB Exempt, $700-725/pr, retail $849/pr)
INTAKE lift- 12.3 mm, duration 266 @ 1mm
EXHAUST lift - 11.8 mm, duration 262 @ 1mm
- Stage III - (race only, $700-725/pr, retail $849/pr)
INTAKE lift- 12.8 mm, duration 270 @ 1mm
EXHAUST lift - 11.8 mm, duration 279 @ 1mm
quote: I had an interesting discussion with Dave Hsu at skunk2.com :
These (Stage I) cams pass smog and do not require the use of new valvesprings (though recommended). B18C1 engine makes 17+ more to the tire on average.
Please inform your readers that bigger is not necessarily better. We have only seen 2-4hp increases when using toda B's or jun3's. Neither pass smog. Both require new valve train and in the case of Jun's, there is only a 3-4 degree margin of error before the valves grab each other and destroy the motor.
With the current (Stage I) cam our goal was to make as much power using stock valvetrain, while preserving driveability, reliability, and emission friendliness. 12. Spoon ($1045/pr)
Specs were kindly provided by Alan Chow at A&J Racing
http://www.spoon-sports.com/
INTAKE lift - 11.53 mm, duration 256 @1mm
EXHAUST lift - 11.13 mm, duration 245 @1mm
13. Toda
The advertised duration @ 0.015 in. lift can be found on their website. Thanks to Ali Jahed at AKH Racing for the duration @1mm valve lift specs.:
http://www.todaracing.com/products/h...camshafts.html
- Spec A's ($920/pr)
INTAKE lift - 11.6 mm,duration 250 @1mm
EXHAUST lift - 11.2mm, duration 240 @1mm
- Spec B's ($980/pr)
INTAKE lift - 12 mm, duration 255 @1mm
EXHAUST lift - 12mm, duration 245 @1mm
- Spec C's ($1100/pr)
INTAKE lift - 12.5 mm, duration 255 @1mm
EXHAUST lift - 12.5mm, duration 255 @1mm
- Spec D's ($ Not Available/pr, RACE ONLY )
INTAKE lift - 12.9 mm, duration - estimated 265 @1mm (Advertised 305)
EXHAUST lift - 11.9 mm, duration - estimated 275 @1mm (Advertised 315)
In terms of streetable cams, Toda D's have the highest non-roller intake lift in the market.If you rev past 8400 rpm, Toda valvesprings are required.
quote:
Interesting Comments by Endyn on Toda B-D Cams:
Valve problems can also be attributed to valve springs failing to control valve motion. I won't build any engine with Toda cams these days because there are no springs we've ever found that will last any length of time with them. When the springs go soft, valvetrain separation occurs and the valves typically end up being "dropped" on the seats, rather than eased to their seats by the closing ramps on the cams, thus pounding out the valves and seats.
The potential damage from weakened valve springs is that great in my opinion...at least with Todas. I also don't think their valve springs are up to the task either. If you (have) to run cams like those, you can't run springs that "fit" in an installed height that's relatively "stock". You MUST run a spring that has at least 1.400" installed height with about 68-70 psi on the seat.
We also have a tool that we've built that allows us to machine the tops of the valve guides down in height to get some much-needed clearance between the bottom of the spring retainer and the top of the valve seal. This tool fits in a collet on the Serdi machine and it not only machines the top of the guide, but it also machines the sides and step so the seal will actually sit lower. On heads running in engines with cams with .485" or higher lift, we always machine the top of the guides to maintain .060" clearance between the retainer and the seal. If you don't, oil is forced (by the retainer) through the guide, contaminating the mixture, and burning oil.
- Race-Only "Killer Cams" ($1,800/pr includes solenoid oil line plug)
http://www.todaracing.com/products/h...ec_killer.html
INTAKE lift - 12.0 mm, duration 265 @1mm
EXHAUST lift - 11.5 mm, duration 255 @1mm
quote:
The profile is similar to spec C's. The biggest difference is the much reduced valve train weight. For full race you don't need VTEC components. They just weigh you down. To go beyond 10k rpm one better have some strong yet light weight piston/rods...
These race-only cams are light as hell, idles at 2000 rpm, redline at 12,000 rpm, and have a powerband from 5000-12000 rpm. There is NO VTEC LOBE. They have JUST 2 NON-VTEC BIG ASS SIZED LOBES FROM THE START. There is NO STAGGERED LIFT/DURATION for enhanced low rpm swirl filling as seen in the stock nonVTEC primary lobes.
When you look at the 305 degrees "advertised duration" spec for the Toda Killer cam, you should be aware that the duration at 1mm valve lift is only 265 degrees which is identical to the Toda Spec C.
So what's so special about them? Well, according to Ali Jahed at AKH Racing (Toda official distributor in North America) :
quote: The duration isn't much more than the Spec C's, but the ramp speed/angle is waaaay different.
As you already know, lift/duration don't tell the whole story when it comes to camshafts and in this case the lower inertia (hollow core) and consistent oil pressure (no vtec solenoid) contribute to consistent performance and improved throttle response which is top priority in a professional race car.
Lift and duration specs are not the only numbers to look at. Clearance ramp and flank angles or the steepness of how fast the valves open and close also is important to performance.
14. Zex/Comp Cams
http://www.zex.com or http://www.compcams.com/catalog/192_193.html
Thanks to Matt Patrick at Zex (Comp Cams). All $566.61/pr (the 57300 are by far the best bargain on the market).
- 57100, no valvespring change required:
INTAKE lift - 11.05 mm, duration 230 @ 0.05 in.
EXHAUST lift - 9.90 mm, duration 228 @ 0.05 in.
- 57200, valve spring change is required:
INTAKE lift - 12.45 mm, duration 248 @ 0.05 in.
EXHAUST lift - 11.43 mm, duration 246 @ 0.05 in.
- 57300, for racing only, high compression and major port work needed, for 10,000 rpm engines only:
INTAKE lift - 13.20 mm, duration 260 @ 0.05 in.
EXHAUST lift - 11.94 mm, duration 258 @ 0.05 in.
Ще направя логично предположение, и моля не ме замеряйте с домати. Колкото по-неравно (остро, изпъкнало) е едно бутало, толкова съответният сетъп е склонен към детонации. Според мен точно затова на икономиците буталата са като паници, за да се намали риска от детонация до минимум, понеже както знаем те работят на доста бедни смеси Малката камера компенсира паничестото бутало за да се докара що-годе прилична степен.