@Jimmee1990
My head is flowing 190CFM @ 9mm lift and 20inch water with std valves. Current CR is 11.5 so I hope this can be increased to 12 by shaving the head.

@davegt27
With a 320° you sure can go wrong!

duration @ 0.1mm - @ 1.0mm - valve lift at TDC 7105149 - 278°/268° - 246°/238° - 11.15mm/10.70mm - 2.95mm/2.45mm - tarmac rally - race 7105150 - 287°/278° - 256°/246° - 11.65mm/11.15mm - 3.65mm/3.15mm - tarmac rally - race 7105151 - 294°/287° - 262°/256° - 12.05mm/11.65mm - 4.30mm/3.85mm - full race...

I am aiming for max hp @ 8400rpm (have a 9000 redline) and max torque @ 5500rpm; I have all the goodies to run any kind of cam. Which do you think will meet these requirements the best? I am not interested in any other cam brands. I have tried to contact Catcams about this but don't get anything use...

6 - 4,7 and TRD dampers, rears adjustable as a minimum. There's your answer - now stop thinking and go swipe your bankcard

Running TRD's - fixed in the front and adjustable in the back. Once had yellow Koni's - remember you could adjust them by detaching the bottom and turn the shock.

[/quote] search for "valve seats"??? http://www.martinwellsco.com/index.php/valve-seats/[/quote] That's very embarrassing...I did exactly that (using bing.com - since we don't have access to google from China) and got very little - thanks Dan. Answer from Supertech: "You should be abl...

I am having a very hard time finding some valve seats for those oversized valves.

The original ones from TRD are discontinued...
http://www.trdparts.jp/english/parts_engine-4a-g16.html

What to do?

So whats the conclusion here? If my cylinder will fill faster I should also trap more air and get a bigger bang - right? So money aside - this is good. Can the area under the graph be used to estimate hp gain?

Not sure this is what you mean, but:
Silvertop ID 42mm
Martelius R1 41,5mm

for the valves... there are a few manufacturers... Supertech advertises a lot, but SI and Ferrea both offer 2mm O/S 4AG valves as well. If you keep lifts under 10.5, you can use Toda valve springs instead of double springs.... which requires special guides... seals... springs... and retainers(big c...

@totta crolla
Hey

I cannot reply your message because is am not "seasoned" enough in here (however stupid that is)...so please send me an email: harkes@gmail.com

Why not try the cams you already have with the large valves ? Those cams certainly appear to produce the goods ! Using lift of more than 9.5mm will require that a relief is cut out of the head for each of the lobes. I will not be doing this build myself so not going all-in first time will double th...

given that i now will get bigger valves, run a shimless setup and can increase the CR by shaving the head what cams will you guys recommend? yoshimitsuspeed mentioned kelford being a really good cam - what about catcams that are easy to source in europe?

Agreed. Looks same as mine = stock.

Here is the full build list. Smallport, silvertop ITB's, OMEX 500, TRD 0,5 headgasket, FA conrods + pistons (supplied by Dan and milled to lower CR), std oil pump and valvetrain (see cam below), Martelius R1 header and exhaust, head ported and flowed (as an experiment by a friend that was building h...

totta crolla wrote:Standard inlet valve is 29.5mm so the optimum lift according to Burton is 7.375mm

Then I am very puzzled by the fact that (almost) all cam companies offer cams with lift in the +8mm range - some, like catcams, even offer +10mm.

So my current engine is making 189hp (crank) @ 8400rpm. If aiming for 200hp would I benefit more from increased lift or bigger valves. If higher lift I am ready to convert to a shimless setup. My compression ratio could also be bumped a bit. CURRENT MODIFICATIONS: Ported head, SilverTop ITB's, FA co...

I am running Ventura springs (butter soft compared to 8/6kg's) and TRD dampers and love it + 15" wheels. The dampers are adjustable in the rear which you can use to adjust the balance of the car. 1 for street driving, 8 for drift and 4-6 for track. I have been to the Nurburgring 3 times with th...