Supercharged K20a2 Vtec - Race Spec by cptkirk

11 minute(s) of a 377 minute read

For some reason recent posts have gone missing, oh well...

Here it is again:

Fitted new cltuch and flywheel and the weekend and also the new belt (fits like a dream), I also got the motor back in the car so its all go to get it running and ready for a track day on 2nd June.


New clutch and flywheel:




new belt:

4-26-2012

Exhaust

I managed to get the new exhaust flanges all welded on and exhaust is off getting ceramic coated (inside and out) and due back in a week or so - coating done at Camcoat.co.uk

A few shots of the various parts before they went off for coating:


Headers:







Y-Pieces:




!80 turn:

TB-SC inlet manifold

A bit more progress has been made.

I discovered a fouling of the TPS on the roll cage so I have had to rotate the TB through approx 30degs (didnt get the angle right the first time as you might tell by the small pilot holes). the last few photos show it marked up ready for another go at machining (marked black to be removed). I am waiting on some grinding stones and flap wheels to sort the inner tunnel smoothness.....


Photos:

5-15-2012

I got remapped by my tuner Scuffers yesterday with my new setup. I am very pleased with the numbers.

Dyno'd on a Rototest Dyno, bolted straight to the hubs.

Mods since last dyno =

Bell Intercooler (own design - made by Bell)
Johnson CM30 pump
Pre Rad, 26"x7"x2" Aluminium
10mm PTFE Thermal Gasket on Intake manifold (own design - made by me)
TB-SC Manifold (own design - made by me and my buddy Stevie G)
6.37" Crank Pulley
3.4" Blower Pulley
72mm Throttle Body (OBX - not a good make, steer clear of them)
Snout Clamp + extra pulleys for belt wrap and improved effectiveness of OEM auto tensioner (own design - made by me, and buddy's Stevie G and Jim Bright)
Ceramic Coating - Header, 4-2 & 2-1 parts of the exhaust

Dyno Plots:

RUN 1




RUN 2




RUN 3






The numbers above are HP at the Hubs, to work out the BHP at the Flywheel add 10% for transmission losses, so 333.1 x 1.1 = 366.4BHP




And a video of the last pull - watch for the exhaust glowing red through the ceramic coating then the F-ing great flame when it hits the limiter:

I still have work to do before its back on the road but I am dead chuffed with what I got and there is room for even more power by using a smaller blower pulley......

5-31-2012

I finsihed of my rear parcel shelf and the car is going for its MOT real soon, I am Goodwood this Saturday afternoon for a track day, well looking forward to it.

Any Hoo, here's a few snaps fo the new viewing window parcel shelf, I have to raise it due to the new height of the Supercharger and Throttle Body:

6-28-2012

I got a still from the video of the car on the dyno, looks pretty sweet:





On a slightly different note I developed a rattle, pulled the parcel shelf last night and found something a little more than loose, I only have myself to blame for it but are super thankful it didnt make more of a mess considering its proximity to the fuel line.


OK, look at this pitcure and see the cowling on the idler pulley:





and now look where it is, no wonder I could hear a rattle, one more thing to fix........:

8-2-2012

TYRES

I eventually accepted the fact that the rears (Toyo R888 205/60 R13) had seen better days and were likely to land me 6 points if I got stopped by the Police, so I opted for two new Toyo R888 225/45 R13's. I should probably take this time to say that I get a discount on Toyos and had I not I would have opted for Kumho 235/45 R13's

I offered them up against the old tyres and was quite surprised as to just how much smaller the new tyres were in height. The extra width looks good but now I have fitted them I believe I could have gone wider, next time.....

First impressions of the tyres are good, less roll for sure and makes the car feel a bit more nimble. The ride comfort hasn't been affected by any great amount. The acceleration will be improved and now I have to get new acceleration timings, just waiting for good weather.

For those that are interested here are a couple of photos of new and old for comparison.

10-3-2012

OK, after 24hours of uploading and then another few hours of clipping & processing I now have one of the sessions from the weekend sorted.

As you can see from the rev counter and even from the noise of the charger, there is still a lot more to be had from the car, I still need to grow bigger kahunas, that said on a track day like that its difficult to know what everyone else's skill level is so I found myself backing off quite a fair amount and only overtaking where it was safe to do so.

All comments on the spin welcome.......


ENJOY:

10-8-2012

Here's the a video from my first run at the Miniworld Action Day 2012, I get three good laps in before I get black flagged, I have timed the laps and put the times in the video. Looking at the footage there's a lot more to be had from the wee Beasty, mind you as it's only my third ever track day I didnt think I did too bad......enjoy and sorry about the sound, going to ask Santa for a Go-Pro for Xmas.....

I just checked the lap recorded lap times of Castle Combe and my time is pathetic, considering the power to weight of the car I should be more like 1:15 - 1:20 (my best so far is 1:31), man I need to get some track driving lessons.........

11-8-2012

NOISE - the car passed the static and registered 97db's, then according to the clerk of course it registered at 101db's on a drive by, apparently the drive by limits was 92db's. He then went on to tell me that normally if a car is registering so high on a drive by that it would register around the 120db's on a static.

Then I had to try and explain how the supercharger is on bypass when the car is being held at a constant rpm and it gets a whole lot noisier when its under load.

To keep the CoC sweet I offered to stick my extra bike silencer on the wee beastie. It was static tested again (dropped 4db's) then he sent me out for 3 laps, one to warm it up and the next to raz it past then an in lap. So instead of hitting 8800rpm out of the corner I went to 7000rpm (and continued to do that on camp corner for the rest of the day) the CoC registered me at 94db's on the drive by but allowed me to carry on - Good man..... You can see the difference in the two videos, the one with the black flag you can see that I take it higher in the revs up the start finish.

It really is nowhere near as loud as it seems in the videos from inside the car, more than anything you can hear the charger whining like a disgruntled girlfriend/wife.

3-12-2013

I can report that the new clutch is alot better for regular driving than the old carbon clutch, I cant even say it was nice while it lasted as it was just a pain in the a55 having to keep it warm to make good engagement. The best thing about having a carbon clutch is telling people that you've got one, living with one is quite different.....I can't recommend the new Exedy clutch and flywheel that I have in mine now (can remember the part codes of the top of my head).

Changing the Crank pulley was done primarily to spin the charger faster but a great addition to the mix was the fact that it spins the water pump faster. I wouldn't consider an electric pump at this point as what I have is more than adequate now. Also the blocking off of unnecessary heater matrix pipework was a big help to getting the water flowing properly - for anyone reading wondering, do not use the bypass pipe as supplied by Z's to loop the heater pipes together it creates a pass with little resistance that does not flow to the radiator.

I haven't been doing anything to the car recently due to lack of funds, credit cards need paying off...

Thanks for the kind words, I am glad I built the car and hope I can pass on anything I have learnt to the others in the community/forum...

4-23-2013

Well I went to RAF Marham Charity Track Day on Saturday and had a good time, right up until the point that my boot lid came undone, it doesn't sound much but the strap that holds the boot open in normal circumstances snapped and then the lid dropped to the ground, in doing this it bent some bodywork and cracked my diffuser, whilst it was dragging down the road it ruined the boot handle, got stone chipped to death and the exhaust melted the paint. It will be fixed in a few weeks, just an expense I could have done without.

Anyhooo, footage was taken and its up on YouTube: