k20z4 & k20a

[Menzy]

been researching in trying to find why the k20a found in the fd2r is more powerful, more torque as well as higher redline then the k20z4 found in the aussie fn2r.
I guess the only thing i can see is the k20a runs at a higher compression then the k20z4 but is that the only difference to make that extra power, i mean it could be a tune too but just wanting to know.

could some one shine some light please and is it possible to have a k20z4 running the same numbers as the k20a and how is it achievable.

thanks

Details
K20A
K20Z4

K20A

Bore is 86 mm & Stroke is 86 mm for all of the K20 engines.

• Found in:
  
  • 2007- Honda Civic Type-R (FD2)
    
    • Displacement: 1998 cc
    • Compression: 11.7:1
    • Power: 225 bhp (225 PS, 165 kW) @ 8000 rpm
    • Torque: 158 ft·lbf (215 N·m) @ 7000 rpm
    • Redline: 8600 rpm
    
    
  
  

K20Z4

This inline-4 cylinder internal combustion engine is found in the redesigned Honda Civic Type-R (FN2). It has an aluminium block with an aluminium head, and a bore and stroke of 86 mm*86 mm, resulting in a 2.0 Liter displacement.

• Found in:
  
  • 2007 Honda Civic Type-R (FN2) (Europe Market)
    
    • Displacement : 1998 cc
    • Compression : 11.0:1
    • Power: 197 bhp (201 PS, 148 kW) @ 7800 rpm
    • Torque: 142 ft·lbf (193 N·m) @ 5600 rpm
    • Redline: 8200 rpm
    • 16V DOHC I-VTEC changes from low speed cams to high speed cams at 5,400 RPM
    
    
  
  

[lukits01]

K20A
68mm to 64mm Throttle Body
JDM PRC Camshafts (more duration)
RRC Intake Manifold
Stainless 4-2-1 Exhaust Manifold
RRC 11.7 CR Pistons
No Balancer Shafts in oil pump assembly
MAP as primary load sensor
ECU tune to suit 100RON fuel

K20Z4
64mm to 64mm Throttlebody
RSP Camshaft
RSP Intake Manifold
RSP 4-1 Cast Iron Exhaust Manifold
RSP 11:1 CR Pistons
Balancer shafts in oil pump
MAF as primary load sensor
ECU tune to suit 98RON Fuel

[Menzy]

K20A
68mm to 64mm Throttle Body
JDM PRC Camshafts (more duration)
RRC Intake Manifold
Stainless 4-2-1 Exhaust Manifold
RRC 11.7 CR Pistons
No Balancer Shafts in oil pump assembly
MAP as primary load sensor
ECU tune to suit 100RON fuel

K20Z4
64mm to 64mm Throttlebody
RSP Camshaft
RSP Intake Manifold
RSP 4-1 Cast Iron Exhaust Manifold
RSP 11:1 CR Pistons
Balancer shafts in oil pump
MAF as primary load sensor
ECU tune to suit 98RON Fuel

with all these changes made to a stock fn2r and running the same ecu with the same tune... what gains would there be?

i guess it would be worth re-tuning the ecu for 98RON Fuel?

[aaronng]

If you are very familiar with the technology in the K20Z4, then read this article to find out the features in the K20A-FD2R and identify which ones are not in the K20Z4. http://asia.vtec.net/Engines/FD2K20AR/index.html

[Menzy]

thanks aaron... all i have to say is omg. and very f*cked how we don't get the fd2r here.

[clem]

Few reasons as to why we don't/can't get the FD2R here, main reasons being

1. Cheaper to build cars and import from Thailand (FN2R) as opposed to Japan (FD2R)

2. FD2R Built to run on 100RON unleaded but Australia only offers up to 98RON

[aaronng]

Few reasons as to why we don't/can't get the FD2R here, main reasons being

1. Cheaper to build cars and import from Thailand (FN2R) as opposed to Japan (FD2R)

2. FD2R Built to run on 100RON unleaded but Australia only offers up to 98RON

No, FN2R is made in the UK, more expensive labour than the FD2R.

FD2R runs fine on 97RON, as stated by a Honda Japan engineer during the FD2R launch in Malaysia (they get a max of 97RON only)

[sitta]

I think the main reason is honda australia thinks that the fd2r is too hardcore for australian market and it is not a hatch its a sedan, they need a hatch to compete in the hot hatch market

[90LAN]

honda australia
doesnt beleive in there slogan
POWER OF DREAMS
becos all we get are nightmares with what they bring to australia
we should be getting wet dreams
HONDA grow some BALLS
bring the fd2r

[fasthonda]

I think the main reason is honda australia thinks that the fd2r is too hardcore for australian market and it is not a hatch its a sedan, they need a hatch to compete in the hot hatch market

You're right!but also the FN2 has been designed to be a NA "Golf" ie have all the creature comforts and some performance.The problem exists with the weight (1345kgs)-the Golf has a turbo to deal with it's weight.
In every test that I have seen from o/s the FN2 still manages to beat the Golf GTI at track work hec even in the 0-400m times the CTR isn't that far behind.The weight though, is one of the major issues .The current issue of Motor Mag. has the comparision between the Clio Rs Vs CTR,Mini Cooper and the Peugeot GTi.
Althought the CTR was the slowest around the test track,I was suprised by some of it's basic numbers:

0-100 km/h 6.99 secs.
0-400m 14.91 secs.

The main criticism was of course ,the weight of the FN2 which they mentioned induced understeer.

FN2 1345 Kgs
GTi 1250 Kgs
CLIO 1221 Kgs
MINI CS 1130 Kgs

The weight differences( FN2 Vs competitors) tells the story.It ranged from 95Kgs(GTi) to 215kgs(MCS).
As I was reading the review it almost sounded as if they liked the FN2 more than the other hatches. Anyway the FN2 was the runnerup to the eventual winner the CLIO RS.
Just for a bit of interest there is also a review of the FD2 Vs the Mini Cooper Works(158KW) .In Britain they are about the same price check it out there are also a couple of clips.So far in O/S tests the FD2 has always impressed the reviewers-except in the ride/comfort area

http://magazines.drivers-republic.co...blue2008/?fm=2

I don't think we will see an official import of the FD CTR- in Australia.Maybe in the next generation of Civics Honda may..,just may give the same "true"Type R to all their markets

[Menzy]

fasthonda: i couldn't agree with you.
I drove the EP3 and you can tell how light it is. I guess being made in europe is why they look for comfort hence the extra weight.

but then again if we were to put those cars into a diet what would you do:

rims...

[Ninjadust77]

i dont know about u guys but the doors on the FN2 feel a'lil heavy, im sure some weight can be lost there and the seats can probably be replaced for some light carbon/kevlar ones, and as Menzy suggested some lighter rims again cutting down on the much needed weight loss...