Choosing the right sport cam...

[Topolino]

Well I would love to learn more about 'learn to choose the right camshaft' but looking at page below I'm nailed to the ground. To much to choose from...pfff!  
 
http://sklepswiatek.pl/fiat-c-54_110.html?str=50

...high lift, low lift, long duration, short duration, more-/less overlap you name it. Its all there. And if you compare a fast cam with a standard cam they both have an duration around 315Ëš. I always thought that the higher the duration number the faster the cam is.
At the moment I'm really confused because there is so much to choose from. All I know right now is that in NL they advice me to buy a 40/80-80/40 300Ëš cam and that a good cam for fast road use needs torque in the lower and middle rpm field. That is better then to have a gas guzzling high rev cam which only will work well on highways.
Somebody out there to help me out?



ps: 'W' stands for 'regular' road use, 'R' for 'rally' and 'GT' for 'race'.

[dajwid]

It all depends what you plan on using the car for.

Race cam wont tick over nicely at the traffic lights 

[Topolino]

...car will be used in daily driving. Or I'll take it out on these famous Sunday drives. The engine I've got is a 652 air cooled. There will be some modding to the head too and the carb I will mount is gonna be a Solex 34 PBIC. A CSC exhaust will be on the engine as well. So...which cam is gonna help me out best? (..it prob. will be two or more)

[DEYAN IYI]

288* - FT.20020 is the new name of the former model #385. On the border between street and race. With the mods you want it will gain 35hp with only 1l more gas per 100km ( 98 octane).

The modifications Swiatek names are:

-1,8/2,5mm head skimming
-25/45% lighter flywheel
Sport exhaust
98 octane

A friend of mine has it 5 years now (~50.000km) and he's pretty happy with it.

More than 290* is not a daily driver  

PS: More than -25% lighter flywheel isn't good for the street. Abarth's one weights about the same as original 650cc -25%.

[Hazey-n-Marc]

Do you mean it will up the hp by 35, or it will increase the hp to 35?

Dajwid is right, my dad fitted an ex saloon car championship samuri racing (Wyn Percy and Martin Brundle) top end on his 1976 celica (one of the pit crew were working at the same factory as my dad and said he had a few parts still laying about ), it would barely run below 4000 rpm. Was unusable in town, it was an absolute weapon on the open road though!!

[DEYAN IYI]

35hp in total   and it's a lot, well +50% power.

Max torque ~4000rpm, max power ~6000rpm.

Well, I said 35hp, but it depends on modifications. If I remember well, the minimum was 30hp with this one. Max speed about 130-140km/h and 0-100km/h in 12-15 sec. 

[popik81]

my engine is 34 with this carb, its good engine for normal drive....

but....


with 555 from KAŁUŻA can get 45.... bhp head go down 5mm fly wheel 2,7kg sport exhaust, diferrent valves, and few thinks....

[Topolino]

Where did you get the specs of Swiatec from? I've been looking for such at there site but I couldn't find it at all.
I do not understand why some (Blitz) say that 1.6 mm is max skimming while Swiatek and all other Poles say 2 till 3 mm. is no problem. Who is right in this?...and please remember valve lift!

I think that getting above 30 hp. is satisfying to me. Read 35!  

A 300Ëš cam seems same as 595 EsseEsse. So far as I know this set up was used on the street as well. Am I right?

[popik81]

they are on Polish webs....

[Topolino]

they are on Polish webs....

Linki please...

[DEYAN IYI]

Read something about Dynamic compression ratio!

Matuska could help you http://www.126fan.sk/eshop/index.php?main_page=product_info&cPath=6&products_id=826

[Topolino]

This link only brings us to a home page of Sloval 126 forum. Not the particular subject.

@ Popik: In what kind of quality does the Swiatek cams come? They show different prices and on there site they show gray and dark gray variants.

[DEYAN IYI]

Hm, don't know what's wrong with the link... The camshaft costs 120E, no special info, probably they got different models on stock.

PM to Ludevit Matuska 126fan.sk here in the forum, he will advice you. 

[popik81]

1 one 3best/most popular.... all of them are diferrent.... diferrent high, and time of open velves..

[Topolino]

Yeah I did notice that. But which cam is most pop? Here they advice 290 - 300 degrees cam for road. Which one is that from the Swiatec cataloq?