Dyno Leaderboard Version III

[Guest]

Had that discussion a while ago with mine. Its at wheels he assured me no drivetrain loss is applied.

[jazza]

 DacerX said:

that engine sounds familiar........

The old owner of the car had it built for v4 street legal track car, has high comp pistons and bored and stroked. Needs avcs heads to make it heaps better

[funkytown]

needs not stupid cams.. to make it better.

also 3082 isnt a smart turbo choice

reaonable numbers otherwise.

[jazza]

I was after low down power with standardish feel and that turbo feels like that, mate has very similar setup but gt3540 and is damn laggy. But i bought the car with this turbo and its brand new genuine garrett so wanted to see what it was capable of. Gcp said its got potential, just needs some tweaks. Short blocks built and tested to 400+kw

[funkytown]

280s wont give low down, they shift it way up north.

the problem with the 3082 is its way to small a turbine wheel matched to the 82mm compressor. a 76mm compressor, or a gt3576 even would both make as much up top as your 3082 and come on sooner.

example, gtx3076r on a 2.2 with standard heads is making ~321wkw and comes on nicer than yours.

Understand you bought it as is though and its sunk cost.

[jazza]

Yeah i didnt bu the cams, previous owmer wanted it setup for high rev track racing. Yup bought it with future plans i.e new fuelling, headwork and turbo then retune. Im happy with it for now and it feels very fast and smooth.

[Guest]

Garry likes the GT3082 or 3582 Jon. Few lads running round with 3082 around 300kw ish. RSKIKN was one of them.

[funkytown]

fair play, hes welcome to like them, generally speaking with a 0.63 rear housing they are not very nice. and generally you can get better response and top end with other garrett options is what im saying.

they go nice - they are just not what results show is optimal.

[Guest]

 jazza said:

It says at engine but gcp said at wheels? Safe and conservative tune, needs bigger turbo and injectors

2.35l forged and sleeved

Link g4

850cc injectors nearly maxed on bp 98

Sinco mani and gt3082 turbo @ 1.5bar

Kelford 280 degree cams

The dyno graph looks like it hadn\'t peaked and was still making power at and possible above 6000rpm and maybe more if reved higher, or did GCP just clip the graph at the point it starting to lose power and just didn\'t include that in the readout?

[jazza]

Nah he only wanted to push it to around 6k, still making power right through but was getting close to maxxing injectors. Ill post pic of old dyno sheet to compare

[jazza]

Original sheet with different exhaust mani and tuned at speedsource, was very laggy and no boost in first gear.

[marc]

so why are the 850\'s maxing out so early now?? (they should get u into the 300\'s on pump fine) What AFR\'s is it tuned to now as it looks to be mid to high 11\'s in that last graph which is fine..

Also is it a stroked EJ22 or de stroked EJ25?

Ither way the outputs a good number for a streeter 4sure

[Guest]

oh ok, 280kwatw on 21 ish psi is good though. Out of interest what brand injectors are they sard?

Ive seen builds with higher kw\'s not maxing out 800cc Sard\'s so was wondering why they are maxed? f there is a reason?

[jazza]

Thats what i thought but gcp said when he chucked it on the dyno the injectors were nearly maxing so hes brought it back to around 85-90% duty cycle. Its a 2.35l so lil more displacement over standard. He said 1000s or 1200s would be better with a bigger turbo. Its tuned reliably now and with the built engine it isnt being very stressed

[jazza]

Its 2l block thats bored out and stroked plus dowelled and sleeved. Ive had it out and got possum bourne ms to remove heads to check internals over and leak down test and theyve confirmmed all the bits are as i was assured.

97mm pistons and 2.5l stroke equals 2.35 by pbms calculator

[ra555]

850s shouldnt max out mine made 330kw on 800cc

[jazza]

Yeah shouldnt think they would max, ahwel im not the tuner, im the customer and gcp said its all running safe fuelling and everything so im happy and it goes alot better. I paid for a decent tune and driving it tells me its a sure step up from what it was.

[Guest]

 jazza said:

Yeah shouldnt think they would max, ahwel im not the tuner, im the customer and gcp said its all running safe fuelling and everything so im happy and it goes alot better. I paid for a decent tune and driving it tells me its a sure step up from what it was.

Does fueling a 2.5 use more? It is a bit weird looking at other peoples results to see it that low for what it is. Wouldnt expect injectors to limit it that much though.

[funkytown]

hard to compare gcp dyno but 450nM is also quite low for given power output. inj maxing also doesnt make total sense as few have listed above.

[jazza]

Yeah i have no idea and im not really that worried, it goes fast it runs smooth and im happy. Unsure on the issues behind lack of power or torque or whatever it is you say thats lacking. Maybe ill try a different tuner next time. I dont see why 850s would max out either but thats what was said to me. If i knew more about tuning id be able to answer. It is a smallish turbo so once i change it ill see what power i get. My brother can have a look on his laptop at the tune as hes a guru on that stuff and can see what everythings doing, or anyone else that wants to is more than welcome to have a gander

[ra555]

Abit shabby but been sitting in car for last 6months. Where it says 323kw it goes abit higher.

330kw on 98 pump gas

[ra555]

That was done back in mid 2012

[jazza]

Talked to gcp and asked what the power curve was like after 6k amd he daid it kept climbing to over 300kw but didnt wanna compromise reliability from the injectors getting close to maxed out so only displayed the power to 6-6.5k. On 21psi too.

[ra555]

I heard that gcp dyno reads high?

[ra555]

Mine made funny results on dif boost during the tuning such as 213kw on 9 psi

-260kw on 16psi

-300 on 21psi

-310 on 22psi

Powers all over the show.haha but when we made final results thats what it made