My friend sent me the link to Buddy Club's site showing the new Spec VI's. I was wondering if anyone has had a chance to try them on a motor setup? what i found interesting is the specs which in fact have smaller lift than the spec IV's, but more duration.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Buddy Club III 11.59mm, duration 304@1mm 10.71mm, duration- 294@1mm
Buddy ClubIII+ 11.2mm, duration 296@1mm 11.5mm, duration- 290@1mm
Buddy Club IV 12.3mm, duration 306@1mm 11.8mm, duration-302@1mm
Buddy Club V 12.8mm, duration 312@1mm 11.8mm, duartion- 306@1mm
Buddy Club VI 11.8mm, duration 319@1mm 11.85mm, duration- 307@1mm</TD></TR></TABLE>

 

I think those durations specs are advertised duration. If the cam had 319 @ 1mm (0.040) it would be around 345-350 advertised!!

 

IN 319 11.8mm and EX 307 11.85mm are the advertised specs, but when you look at the opening and closing specs they do not make much sense at all.

IN @1mm 23 BTDC - 50 ABDC -&gt; 253 duration
EX @1mm 49 BBDC - 14 ATDC -&gt; 243 duration

This is not the specs of a big cam, and only 37 degrees overlap is not exactly for high rpm use either. Strange cam specs for something called Spec VI Extreme camshafts.

 

Tom had tried running them and actually lost power against his BC4's, but he was thinking it was because he wasn't really able to play with the gears very much. His big valve head from Brad didn't get along with the duration of the 5's, ran into valve to valve problems.

 

those spec six's were more than likely made for people that wanna run big valves not stock valves, less lift with more duration..

 

thanks for the input everyone, anyone else?

 

**** I was tlakin about the 5's lol!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onepoint6i &raquo;</TD></TR><TR><TD CLASS="quote">those spec six's were more than likely made for people that wanna run big valves not stock valves, less lift with more duration..</TD></TR></TABLE>

Big valves + big duration = not good.

Do the new 6's come with inverted radius' also??

 

hmmm

 

The funny thing about big valves is that the cylinder that the valve is feeding doesnt really "see" thats its a big valve until you get some decent lift in it. But with the valve angle of the B heads, you arent really able to get enough lift/duration with the big valves to see any benefits.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote">But with the valve angle of the B heads, you arent really able to get enough lift/duration with the big valves to see any benefits.</TD></TR></TABLE>

Tom's head was previously a DPR "stage 6" head, then reworked by RFD, then done by Brad:

[QUOTE=Tbone]
The head originally had .5mm over Ferrea intake and exhause valves when Rlz received it.
The head now Has 1mm over sized intake valves.. We put new seats in and and went up .5mm on the intake.




Before and after chart of the DPR stage 6/RFD to RLZ's "big valve."

(Not trying to argue with you CC )

 

I dont look at it as an argument, just a discussion.

Yes, the head will flow more air due to the simple fact that there is more curtain area at every single valve lift figure, i never said the head wouldnt flow more air. I was stating that you may have trouble getting large cams in their "sweet spot" due to clearance issues, like what happened to Tom and the BC5's. How are to know he wouldnt have made more power with the BC5's dialed in with smaller valves?

Not too many, this is unfair because any head Brad touches, pretty much WILL gain horsepower.

 

subscribed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote"> I was stating that you may have trouble getting large cams in their "sweet spot" due to clearance issues, like what happened to Tom and the BC5's. How are to know he wouldnt have made more power with the BC5's dialed in with smaller valves?
</TD></TR></TABLE>

True.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote"> any head Brad touches, pretty much WILL gain horsepower. </TD></TR></TABLE>

And very true.

 

it's right but the lobe centers are good.

this thread was 2006
anyone has had a chance to try them on a motor setup, today?

 

Please dont bump 5 year old threads!

 

lol I used the search function and I'm asking exactly the same question.

ps: please, don't hit women, even with flowers