TODA Cams VS CTR Cams VS SIR-2 Cams

http://forums.clubsi.com/showflat.ph...o=&fpart=1

thanks all..

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Originally Posted by Setanta

Danny: SiR/SiR II has been a designation around since 1989. SiR II is just a varient of the SiR with the EGs and EFs - I'm not sure about the EKs.

http://www.honda.co.jp/HOT/ModelData...e_up.html#SiR2

EK SiRs are the same as our VTiRs but with approx 8 more bhp.

Hondar: Danny is running the EG6 B16A which runs 170ps, not the 160ps.

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EK's have sir-ii's as well pete.. 8)

your aim is not to get the highest compression but the RIGHT compression rate to build fast car.

Build your car with the goal in mind and select the cams and choose the right compression to support it.

Dont follow everyone else compression cos is different in every set-up.

Like i mentioned before somewhere, you need to calculate both STATIC and DYNAMIC compression for your setup.

Generally most of the time we know the static one. Dynamic is hardly known to people and there is a website where you can calculate that.

yes after all the research i still have alot to go..but my questions r answered

toda cam gear

toda A

ECu

headgasket

ITR mandifold..


u can lock the thread now..

valve springs and pistons?

the stock b16a vavle springs r ok or i might have to up em with type R

but that's the list for now..

This is a very good thread !
If only everyone with Cams questions would stop by and read it we wouldnt get repeated questions.
Hondar, nice work :)

thanks mate ;)

(steals credit form hondar)

Quote:

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Originally Posted by hondar

1. change to the valvesprings that were proven not to coil bind at the cam's max. lift on a Spintron test but not go overly stiff to create excessively high valve seat pressures (stock 40 lb., Toda valvesprings 50 lb., max. acceptable range is 70-90 lb. at 33.66 mm installed valvespring height) causing wear.

if you don't upgrade the valvesprings, even though the company says it's ok to use the stock ones, you still will see mild valve float. Mild valve float is not catastrophic compared to severe valve float or coil binding.

But you know what valve float is right?
The spring has fatigued at high rpm and loses it's ability to control the rate at which the valve closes against the seat. The valveface slams shut against the seat and transfers this shock or load up the valve stem to the rocker arm and then to the camshaft lobe-rocker arm interface. You get extra wear-related damage and possibly structural fatigue at the valve seat, valveface, rocker arm lobe, valvespring retainer, and cam lobe. Valve float can be identified on a chassis dynosheet as a sudden very sharp or steep drop in hp (in the order of 5% [7-10 whp] or more) at the last 500-600 rpm before the redline.


hondar

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your b16 valve spring wont do good. you need to upgrade it. A type r valve springs will do for Toda A, or if you are buying as a package, no harm getting one. And ensure that valvespring installed height is stock (1.320-1.325 in. or 33.53-33.66 mm)

all the best and keep us posted with any updates. cheers ;)

hm...i see..

need them both do i?

Quote:

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Originally Posted by [[d a n n y

]]hm...i see..

need them both do i?

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Fit ITR valve springs to your intake valves & move your existing intake valve springs to your exhaust valves...
Your other option is to fit Toda springs...
Though some would tell you Spec A cams are a drop in...
Valve float will occur @ high rpm with standard valve springs fitted.

Just a though, if you do streach the budget for Toda springs,
You aught to use Spec B cams over the A's as you're doing the ECU...
This will offer you better bang for your bucks...
Trust me, the low-end torque gains will more than justify this desision.
Also, the actual cost of the pair of cams is the same... (A, B or C)
Cheers

Adrian

Also - Pm answered...