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DC-Auto

04' mk2 BA ute 554rwkw

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5 minutes ago, tazzanz said:

It is a very controversial topic for the Barra, Porting and cams lol. I am looking at chucking 5k into my head in the next month which consists of, Full CNC porting, Valve springs, Custom cams, Machining seats etc, Kelford cams would be doing the work, the last head they did they unlocked another 40CFM on stock valves!! But now I am second guessing it, 850KW @40psi is pretty good going for a stock head.

 

Mate do your thing and don’t over think what you read on forums, it’s a mine field

out there and no one build is the same, or owner has the same circumstances. 

 

I have found that each tuner, work shop, machine shop etc have different opinions on everything, and at the end of the day all want to sell you somthing.

 

Think long term, be honest with your self and make decisions based on logic, research and your budget.

 

Im not ready to build a motor, so cams and head work are of no use to me. If you have the bottem end and the budget go for it mate!

 

Barra the world!

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Nizpro are on the job. They have great R&D. 

 

Our heavily modified nizpro car made 320rwkw on 10psi. Factory turbo. 

 

I put that down to larges supporting mods and head work 

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R&D mate!

 

But yes, not much point really. 

 

Can always scale it out - in theory at least.

 

Nizpro are no joke and in my opinion still have the best kits for these cars.

 

By no means are they perfect, but you can bolt thier kits up and go 500 plus with ease.

 

Generally speaking 500 @ the wheels is always going to cost you about the same amount no matter which direction you choose to go.

 

Start adding all the parts up, labor tune etc  and theres not much in it.

Edited by Typhoon
spelling

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3 hours ago, tazzanz said:

Why bother with headwork with a factory turbo and only 300kw though?

Because that what it made on their tune when we bought it. 

 

Always had a built motor and now has 400kw on 98 on 16psi

 

Head work is really technical. You just can't go removing material here and there.  That's a lot of cash if they havnt done a lot of barra heads.

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lol, the turbo boys are talking port work :nyaah: Coming from 308, 304, 355, Iron heads. VN heads, alloy heads, manifold porting. You have it so easy just turn up the boost. What was it 850KW stock heads, cams omg wonder why I came to the darkside. Seriously no offence but in what circumstance would it ever be worth it $. CNC isn't the holy grail either.

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51 minutes ago, arronm said:

Head work is really technical. You just can't go removing material here and there.  That's a lot of cash if they havnt done a lot of barra heads.

Yes I agree hence why I would choose Kelford cams if I did get it ported.

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On 3/17/2018 at 3:26 AM, adams355 said:

lol, the turbo boys are talking port work :nyaah: Coming from 308, 304, 355, Iron heads. VN heads, alloy heads, manifold porting. You have it so easy just turn up the boost. What was it 850KW stock heads, cams omg wonder why I came to the darkside. Seriously no offence but in what circumstance would it ever be worth it $. CNC isn't the holy grail either.

So, what horespower and torque increases would you expect (Given 850kw with a stock head) with a ported head?

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Hey, hey, hey that's a whole 117kw at the fly......

 

6 hours ago, HI PSI said:

So, what horespower and torque increases would you expect (Given 850kw with a stock head) with a ported head?

Hmm, who knows at that power level geez, no expert ballpark -10psi for same power???. I know who is an expert though for turbo, blown, NA head work not just v8's either is Tony Knight of Knights engines SA. If whoever is contemplating this could get hold of him I think he would be interested. He isn't taking work on atm but you might be able to twist his arm, at least get some reliable info out of him, honest guy. The young guru in head and engine work for any engine.

Edited by adams355

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10psi less, but not same power.. atleast 10% more power, made 606@26psi through a t56, now making 609@17psi through a th400 with 3500rpm stall

 

it cost a sh*tload to do the head and cams, im not regretting it. basic head reco which blew out to ported and polished head, o/s valves, springs, ti retainers $4.5k, match port inlet and exhaust manifolds $400, then cams to make the most of the head $1200, adj cam gears $550, timing chain etc $600, factory ecu wont run it elite 2500 wired & tuned $8250, cams too big for brakes CVR vacuum pump $500............ errr...starting to regret it now.

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11 hours ago, DC-Auto said:

10psi less, but not same power.. atleast 10% more power, made 606@26psi through a t56, now making 609@17psi through a th400 with 3500rpm stall

 

it cost a sh*tload to do the head and cams, im not regretting it. basic head reco which blew out to ported and polished head, o/s valves, springs, ti retainers $4.5k, match port inlet and exhaust manifolds $400, then cams to make the most of the head $1200, adj cam gears $550, timing chain etc $600, factory ecu wont run it elite 2500 wired & tuned $8250, cams too big for brakes CVR vacuum pump $500............ errr...starting to regret it now.

 

Yep, easy 10% in the trans and stall. How does it drive compared? What is peak torque and rpm (if you wish to say). Enjoy its only money :)

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On 21/03/2018 at 6:40 AM, tazzanz said:

Yes its scary how quickly things blow out, that's why I have stopped keeping my receipts lol. How big are the cams?

288° duration, 0.508" lift, 112-114 lsa

 

On 21/03/2018 at 10:29 AM, adams355 said:

Yep, easy 10% in the trans and stall. How does it drive compared? What is peak torque and rpm (if you wish to say). Enjoy its only money :)

peak torque 1350nm is at 3400rpm, and 7000rpm redline

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not a great deal has been happening, trying to enjoy the car a little. been on and off the dyno a handful of times. made 660rwhp on 19psi with E85 before we hit the wall with the fuel pumps and wastegate. Fitted a new turbosmart 45mm gate w/ 14psi spring and a Magnafuel pro tuner 750 pump, and back on the dyno making 716rwhp @ 22psi on E85, then the alternator sh*t itself....

with the new alternator fitted, we turned it up to 27psi and the conditions weren't ideal on the night, strapped it down harder and harder but we couldnt get it past 720rwhp without breaking into wheel spin. the turbo is at its end of it's efficiency,  we are seeing 52°c inlet temperatures at 30psi, with the gains we have seen, we are guesstimating at the moment at a touch over 800rwhp...

we now have a 2step launch control program going through the haltech and all wired in with the trans brake, and we have pretty much perfected everything with the car (fixed minor trans leak, minor rear main leak, etc etc). picked up another set of rear Weld Draglites wheels with better backspacing (15x8 6.5" BS) running a 275/65r15 radial pro. New 1500hp rated tailshaft will go in next week, stuff around with roll racing to shake it all down, then see if we can reel off a 6.0 / 6.1 over the 8th mile (can get kicked out this way, but unlikely)... im still undecided to put a cage in, it is a $4000 expense, eliminates me from a few events a queensland raceway, and makes it a pain in the ass to get it through queensland transport (no exo-cage is permitted, in regards to the rear supports).........36417801_458112977945685_822262587499479 roll racing with 660rwhp https://youtu.be/hW-2ld4jozg36411822_458107071279609_117522554035791

Edited by DC-Auto

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well, all good things come to an ends, and in this case, my 11yr old turbocharger spooled its last spool... fluttered its last flutter.. :verysad1:

37635095_10156441383443965_694689159732937699767_10156441383598965_8832150303450

 

this was a result of my turbosmart blow off valve failing. the compressor flutter was getting louder and louder, and the nut off the compressor wheel tried to take a walk. happened 20mtrs from work which prevented catastrophic damage. 

so a new turbosmart raceport blow off valve is going on, and decided on a half decent sized turbo. 

the new gen2 7275 cea precision should get me over 900hp at the tyre, but more to the point, 800rwhp on less boost. she's been ordered, arrives early next week

 

 

maxresdefault.jpg

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On 24/07/2018 at 11:50 PM, k31th said:

looks more like oil starvation, rather than a BOV failure. No BOV doesn't cause damage or wear :)

it is my own fault really, I have experienced this in the past with a customers 600hp SR20 (huge power for an SR back in 2005). he also wasnt running a BOV, and the same thing happened to him (lost compressor nut). as the compressor wheel is spinning at 180,000rpm and comes to an almost dead stop, the inertia of the nut wants to continue on. My nut was sitting loose on the bottom of the compressor cover inlet.

 

in other news, my 1500hp tailshaft has been installed, turbo has turned up and installed

38700132_10156480420293965_3763518208980

38679715_10156480420233965_2332921102977

still representing for the low mounts

38708091_10156480419933965_396498480832438720633_10156480425783965_5470872467687

fuel line fitting broke on the fuel pump module, resulting in a fuel leak. off with the tub, cleaning up and redoing all of the surge tank plumbing. Solid state relay is on it's way, time the pulse width modulate the fuel pump, and controlled via the haltech.

38735641_10156480425628965_400430280726238614927_10156480425313965_6529381859460

 

so once im happy with the PWM fuel pump setup and have the tub back on, she'll be back on the dyno for hopefully a 1000+rwhp, 36psi tune

Edited by DC-Auto
adjustments

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we had the car back on the dyno a couple of weeks ago, turns out the internal 3bar map sensor was struggling with any boost over 28psi, so I have picked up a haltech 4bar sensor but yet to be installed. still at 27psi but inlet temps have dropped significantly and we are making solid power without too much timing. 

46471948_550751812015134_479280444999729

took the car to one of those torque time sunday morning events at qld raceway, bit of a nightmare morning. arrived, and bolted the radials on, pulled out onto the tracked and put a little heat into the tyres through first from about 40kph, selected 2nd and felt a little slip, straight to top gear (3rd) and popped an intercooler pipe off.. no biggi.

pulled back into the pits, refitted cooler pipe, back out on track.. 1st, selected 2nd.. no gear. I suspected I'd spun the sprag. transmission is now out, will be pulled down this week and sorted..

Edited by k31th
fixed video

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ok, transmission is back together, another full build, same specs as before but now with a 6pack forward clutch arangement, 36 element pro-mod sprag and drum, billet alloy intermediate shaft and a freshen up of the converter. good for 1800+rwhp and 1500ft lbs. 

I still havent turned it up, and still havent installed the 4bar map sensor. I figured I should try and put down the power I have without blazing the tyre before putting more into it.

In other news I figure if im planning on running 150+mph it would be good idea to stop at the other end.. the 2 piston calipers and 322mm rotors are a disgrace, so im introducing the 380mm and 6pot Brembo front conversion im in the process of50797709_10156873630693965_2898195832002

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