What cam in my 2110cc?

[leec]

Hi again Shane,

Thanks for the kind words. I'm still surprised how the car performs as well!

My best 60ft iirc was a 1.509. Car has Koni reds set to hard, bus snubbers and stock springplates/torsion bars and rubber bushs.
Cage obviously stiffens the rear end but was achieving similar 60ft's with a funkenblitz style rear brace bar.

Remember a few of your car/engines as they have ended up in various hands near me in Bournemouth.
Hoping to race this year for a full season with OFF, took this year out due to the birth of my son (no time/money!!)

The gearbox/ratio is a real dilema, I struggle to look at rpm when racing.....too busy!!

Would be good to see you next season

Lee

[Shane Noone]

Lee,that 60 ft is really good.With what is essentially limited power ( 200 ) your car is really hooking up well so the rear suspension and tyres are working and gripping very well in my opinion. My best 60 ft to date is 1.65 with a 12.61 pass at 106 mph on MH DOT's. I have the cage tied into chassis a la Jim Smith style too and use Koni Red's out back,no snubbers though but do have 28mm torsion bars and HD spring plates. I was never sure how hard to set the Koni's up at and always used to run them at max but with recent forum chat with BeetleBug he suggests with my setup one complete turn down from max.................so trial and error next year.

Yeah next year I will definetly be back out racing after a five year absence so be real good to meet you and catch up 

Been there done that with the kids thing so appreciate what your saying as I guess most of us have at some point 

I was originally going to run with the Outlaws but a lot has changed and I just joined up with a real friendly but serious bunch of like minded racers who form the DKR club and look forward to racing with them in 2012.

Anyway bound to bump into you at either Shakey or Santa Pod so come say Hello for sure.

Cheers

Shane.

[DWL_Puavo]

I've had Webcam 86c and CB ultralight lifters in our endurance-race engine (2274cc) ... It's been in use for four years now in 20 six-hours endurance races and also loaned one summer to friend's bus. Tearing the engine now apart because of a cracked crankcase, should be interesting how the camshaft and lifters look. I've always used Kendalls GT1 20W50 with that engine.

Results are now in - no pitting or noticeable wear in neither the lifter nor the cam. Just some normal polishing. I wouldn't hesitate to recommend these lifters and this cam. This same used cam and (numbered) lifters will see another engine some time as they're proven for me to be a good combination!

...and for that Mexico AS41 case, it was cracked at least in three parts - from the both sides behind the flywheel (#3 side crack went to the oil galley) and also a big crack behind the #4 cylinder. No wonder it was sweating a bit of oil. Suppose it's good to weld #3 back and shuffle pin the case.

[181]

Very informative topic! This forum is the best!

makes me wanna go into my garage, rip off that K-8 and install 86C that is waiting on the shelf RIGHT NOW!:-D

[neil68]

I switched from the FK8 to the 86C and was very happy.  The difference in lift is modest (0.012"), but the profile makes the difference:

FK8:  0.534" lift (1.4's), 258 degrees (0.050")

86C:  0.546" lift (1.4's), 272 degrees (0.050")

[nicolas]

I switched from the FK8 to the 86C and was very happy.  The difference in lift is modest (0.012"), but the profile makes the difference:

FK8:  0.534" lift (1.4's), 258 degrees (0.050")

86C:  0.546" lift (1.4's), 272 degrees (0.050")

could you explain this a bit? what is the diggerence in overall performance? does the power band move up higher?

[neil68]

I switched from the FK8 to the 86C and was very happy.  The difference in lift is modest (0.012"), but the profile makes the difference:

FK8:  0.534" lift (1.4's), 258 degrees (0.050")

86C:  0.546" lift (1.4's), 272 degrees (0.050")

could you explain this a bit? what is the diggerence in overall performance? does the power band move up higher?

86C produced 11.2 BHP more power at higher rpms than the FK8, but with a slightly rougher idle (due to overlap perhaps?).  Seat of the pants, it's quite noticeable and 1/4-mile times were 3/10ths quicker!

[nicolas]

thanks. so i think a FK8 will still be better in a heavier car (like my type3) and maybe not give the same ET's as the 86c, but it is always a compromise.

[TexasTom]

 
[/quote]

86C produced 11.2 BHP more power at higher rpms than the FK8, but with a slightly rougher idle (due to overlap perhaps?).  Seat of the pants, it's quite noticeable and 1/4-mile times were 3/10ths quicker!
[/quote]

NEIL!
Out of curiousity, what were the static compression ratios used with those cams, respectively?
I was expecting the peak increase to be a bit higher with the 86C ... ?
Thanks!
TxT

[Torben Alstrup]

The 86C does normally not show super high numbers. The difference is the average power and the torque. That´s what makes the C so powerfull and fast.
When we make an APB calculation on an engine which has a good combo we rarely see higher numbers with other combo´s in the same range.
T

[TexasTom]

Thanks Torben ...

I thought the difference would be greater due to the cam AND the compression jump needed to make it work ... probably a full point greater for the 86C than the K8 ...
I know that's what was needed when I switched to it.

But you're right ... overall power is increased, not just peak.
TxT

[neil68]

86C produced 11.2 BHP more power at higher rpms than the FK8, but with a slightly rougher idle (due to overlap perhaps?).  Seat of the pants, it's quite noticeable and 1/4-mile times were 3/10ths quicker!
[/quote]

NEIL!
Out of curiousity, what were the static compression ratios used with those cams, respectively?
I was expecting the peak increase to be a bit higher with the 86C ... ?
Thanks!
TxT
[/quote]

Yes, I omitted the CR's...9.5 with FK8 and 10.5 with 86C.  Here are the HP curves (I wasn't able to get a torque curve for the 86C, as the printer malfunctioned:

FK8: 169.2 WHP


86C:  180.447 WHP

[nicolas]

so if i get this right, the 86c begins to produce more power over the FK8 at 4500 rpms? below that is is similar or even in favor of the FK8.

it proves a bit the point that Mark Herbert made in one of his engine talks on the other cal look site. if you are not at 4500 rpms you get beaten at the lights  the reason why he choose a W120 in a 2276.

my point, if there is one, is that i really believe (still) a lot of engines are 'overcammed', but the 86C is a good cam nevertheless, it has been used many times with good results in street/strip cars.

thanks for the data.