Cams, Springs, Revs and POWER

[6A13TT TYPE S]

Cams, Springs, Revs and POWER

http://www.clubvr4.com/forum/showthread.php?60575-Cams-Springs-Revs-and-POWER&p=669542#post669542

Recently I have been talking to some head work and cam specialists here in NZ, kennelly cams here in christchurch (run by the man who used to desgin cam profiles for kelfords) after leaving a complete head with him for a day he says he should be able to regrind our factory cams to an advertised duration @ 0.1mm lift of around 264 degrees with in the relm of 10.5m of lift for around the $600 mark.
this seems fantastic to me and alot cheaper then buying billet "HKS" grinds which are as far as i have seen 272 duration but measured at 0 lift, and the most lift I have seen on aftermarket cams if .343" or aproxx 8.5mm
Along with this I Have compared 4g63t valve springs to 6A13TT ones..... They FIT !! the only issue i can see so far is i think the valve stem diameter in the 6A13 is narower then the 4G63T, however it is the same as 4G93T
when i can get my hands on a valve spring compressor i will test if 4g63T retainers and collets fit if not i will test the 4G93T ones. this could open a door to cheaper cam and valve train modifications.

folowing if the above testing for fitment of collets and retainers is sucessful, this could be a possible EOI for anyone who is intrested in a group buy on evo valve springs and cam regrinds. I myself and possibly carl could be intrested in doing this some time after the christmas period, or febuary time frame (provided suitable retainers can be found) the valve springs will have to be bought in lots of 3 between 2 people as 3x16 = 2x24 or we will be left with 8 springs left over which no-one can use.

I will update with photos after I get my eager hands onto a Valve spring compressor​

 

[minxy74]

Updates?

 

[6A13TT TYPE S]

If you follow the link to the Club VR4 page it has been updated.

 

[Rosco]

Hey man, stupid question but would this increase engine displacement with the regrind?

 

[unclepaulie]

no

 

[VOLK]

Rosco, search for some camshaft theory 101 stuff. Cam change won't alter swept capacity, just timing of events, powerband curve etc. There's way too much info out there if you wanna know how they work.

 

[Rosco]

sorry i had a mid thesis derp about cams and cranks, came from the discussion on cvr4 about hyundai forged pistons and i was like cams+piston=derp

60 straight days of 15-20hour days with no sleep is starting to catch up, i stood trying to get into my dads car for 5 minutes earlier. Hadn't driven there in my dads car....wasn't even my dads car...just some womens who thought i was a wierdo

 

[unclepaulie]

lol i know the feeling

 

[6A13TT TYPE S]

right the prices are $630NZD for the cam regrind which will give 264 degrees advertised duration @ 0.1mm lift with overall lift of 10.5mm

these cam grinds will only require you to change the valve springs (as the factory springs will bind with this much lift) a set of 24 springs can be supplied for $345NZD

the stock lifters, rockers and retainers can all be used.