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Discussion Starter #1 (Edited)
Hi Guys

I've refrained thus far from posting too much junk as I'm a 7th gen Honda driver and this is of Couse an 8th gen forum.

But alas I feel the time is right to break the seal and discuss some of the things I'm planning in a couple of weeks. Mostly to take advantage of the expertise on the boards, many a knowledgeable member lurks on civinfo - as it home to some quality N/A K builds!

1st up, I feel I have got the car to a good state with the regular bolt-ons, I'm happy with the chassis and most of the important stuff like brakes etc. are good.

TDI-N tuned the car at the start of the year and she’s been running a nice simple motor configuration.






I dont want to boost as a next step, as IMO it takes a little something away from the charm of the K20.

So I did my research and saved some pennies for the following:



Prayoonto Stage 2 cams



Supertech Beehives and Hi-comp valves

I don't know anyone who has installed these on a European car yet, so its gunna be interesting in terms of cam angles, base maps etc.


I also don't know what the optimum compression is going to be for this setup on UK 99ron fuel... the cam specs are 305/300 13.46mm/11.94mm, so I'm hoping 11.3:1 is enough.


I would whole heartedly welcome any advice or ideas and of course would be happy to discuss any details!
 

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very nice cams. Prayoonto makes good stuff.
if i wanted stage 2 cams, i would buy prayoonto.
 

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Discussion Starter #6
Some really nice figure there! What mods have you added?
The current engine mods are: Piper header and exhaust (2.5")
Skunk2 intake manifold and Throttle
Plus an Injen CAI with velocity stack

very nice cams. Prayoonto makes good stuff.
if i wanted stage 2 cams, i would buy prayoonto.
They are manufactured on Brain Crowers new 8620 steel billet cores, so they should be damn tough!
 

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I also don't know what the optimum compression is going to be for this setup on UK 99ron fuel... the cam specs are 305/300 13.46mm/11.94mm, so I'm hoping 11.3:1 is enough.

99RON fuel for 11.3:1 seems to be useless. 305/300 13.46/11.94 you won't max the cams with this compression rate. You definatelly need more compression. I'm hitting like 12.5:1. If TODA A3 needs more compression and they are "lighther" 297/13 on intake as far as I remember than this specification needs more than upgraded A3s.
 

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Discussion Starter #8
99RON fuel for 11.3:1 seems to be useless. 305/300 13.46/11.94 you won't max the cams with this compression rate. You definatelly need more compression. I'm hitting like 12.5:1. If TODA A3 needs more compression and they are "lighther" 297/13 on intake as far as I remember than this specification needs more than upgraded A3s.
I understand what your saying File, I need to make a quick decision on if I should buy a toda/spoon head gasket! The thing is full duration of the cams and static compression can only tell you so much about the situation.

Overlap between the intake & exhaust opening and ramp times will affect the dynamic compression too.

But I 'm thinking 11.7:1 might be a better CR if it means the power comes in earlier.
 

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Discussion Starter #9
I forgot to list the RDX injectors, really rate these for an N/A car, she runs smoother than stock now!

 

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Discussion Starter #13
After running the numbers through a spread sheet to work out the dynamic CR, 11.7:1 will be needed to keep the cranking pressure optimal.



so a skinny one of these is on the way
 

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Discussion Starter #14
Had a bit of an issue with worn out valve guides & seals in the head. Waiting for parts from the USA has set me back a couple of weeks.

Ended up with a spoon gasket (purely due to lack of stock, and a better price than Toda). Also some Avid engine mounts to keep the motor still.

The next consideration is to get tuned right away, or run the car on a safe map untill I can get a 3" exhaust made?

Are any of you guys running a 3" header back?
 

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Had a bit of an issue with worn out valve guides & seals in the head. Waiting for parts from the USA has set me back a couple of weeks.

Ended up with a spoon gasket (purely due to lack of stock, and a better price than Toda). Also some Avid engine mounts to keep the motor still.

The next consideration is to get tuned right away, or run the car on a safe map untill I can get a 3" exhaust made?

Are any of you guys running a 3" header back?
Theres a few 70mm custom single exit cat backs.
CivicRSA, Allagios I think...2 or 3 others maybe.
 

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99RON fuel for 11.3:1 seems to be useless. 305/300 13.46/11.94 you won't max the cams with this compression rate. You definatelly need more compression. I'm hitting like 12.5:1. If TODA A3 needs more compression and they are "lighther" 297/13 on intake as far as I remember than this specification needs more than upgraded A3s.
well said
 
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