Project 'gozila'...

[WARLORD]

well done marko you have done a excellent job on your baby.now you can come over and show me..lol

[Marko R1]

i expect souvlakia on arrival

[9krpm]

Congrat on the set up Marko.

It must be one nice fun beast to drive in.

Yes I think your tuner is right

You will need the Indy blue 1600cc if you want to change over to E85.

I am going through the process for my 3.0L and T618Z turbo at the moment.

I had around 90% duty cycle with 700cc injectors at 24psi with a power fc D jetro.

With the E85 and 1000cc injectors, the duty cycle was 100% at 23-24psi!

This was with a faulty vipec adaptor board though. One of the transistor on the board kept the EFI relay on and I have injector buzz even when the power was switched off. The injectors were loosely installed on the fuel rail as well, so I don't know how much E85 juice was wasted with these faults.

Dirt is right, the 3.0L sucks a lot of juice

I should have the car retune in the next 2 weeks with the 1600cc injectors. I can keep you inform if you like.

[Marko R1]

Dirt is right, the 3.0L sucks a lot of juice

I should have the car retune in the next 2 weeks with the 1600cc injectors. I can keep you inform if you like.

yes well ive noticed it drinks a substantial amount of fuel, its not built for economy so i dont care

i'd be most interested to see your results - please keep me informed.

what hp is the t618z rated at?

[Marko R1]

i went for a drive last night, its actually much harder to push the car on the road as the power band is much wider than my other setup (i.e. starts spooling @ 3000rpm, rb26 started @ 5500rpm) so i find that im changing gears much sooner than my rev limit (i.e. 7000rpm). i need to get used to it.

i gave it a good squirt in 2nd gear & it broke out into a wild wheel spin

for the 1st time ive rated my car as dangerous as my previous bike (suzuki gsxr1000 worked with 173.5rwhp)...now im waiting for a litre bike to pick on me

[N1GTR]

i expect souvlakia on arrival

Just as a side note, in the last few days ive had so much souvlakia ive loosened my belt a notch.

Yep, thats right.

[Sydneykid]

I had around 90% duty cycle with 700cc injectors at 24psi with a power fc D jetro.

With the E85 and 1000cc injectors, the duty cycle was 100% at 23-24psi!

That's 58.7% more E85 (700 x 90% versus 1000 x 100%). Something is drastically wrong, there is no way any car I have ever seen with E85 uses 58.7% more fuel. I have seen 25% and the occasional 30% when more power(boost) and/or rpm is tuned for. But 58.7% in the same engine at the same boost and rpm is unbelieveable.

This was with a faulty vipec adaptor board though. One of the transistor on the board kept the EFI relay on and I have injector buzz even when the power was switched off. The injectors were loosely installed on the fuel rail as well, so I don't know how much E85 juice was wasted with these faults.

Based on the above I'd say about 30%.

Dirt is right, the 3.0L sucks a lot of juice

It depends on the comparison, my last 3 litre used less fuel for the same horsepower than the RB26 that it replaced. Mostly because I used a lot lower rpm, keeping in mind torque x rpm / 5250 = horsepower.

I should have the car retune in the next 2 weeks with the 1600cc injectors. I can keep you inform if you like.

Thanks that will be most helpfull

Cheers

Gary

[Swiper the Fox]

i went for a drive last night, its actually much harder to push the car on the road as the power band is much wider than my other setup (i.e. starts spooling @ 3000rpm, rb26 started @ 5500rpm) so i find that im changing gears much sooner than my rev limit (i.e. 7000rpm). i need to get used to it.

i gave it a good squirt in 2nd gear & it broke out into a wild wheel spin

for the 1st time ive rated my car as dangerous as my previous bike (suzuki gsxr1000 worked with 173.5rwhp)...now im waiting for a litre bike to pick on me

A big torque GTR is nuts on the street...id roll on the throttle and it would break traction at 6000rpm...that was with a little more than 1/2 throttle. I was unusually quiet after my first real drive around my test track here in Newcastle. Ill admit it did scare me...very used to it now though and want more.

[Sydneykid]

hey gary - the scale along the bottom is kph (0-200)

Have I got it right, max torque is around 4,250 rpm and max horsepower is around 6,100 rpm and it makes less than 50 rwkw at 3,000 rpm? Or is my maths totally screwed up?

Cheers

Gary

[Marko R1]

A big torque GTR is nuts on the street...id roll on the throttle and it would break traction at 6000rpm...that was with a little more than 1/2 throttle. I was unusually quiet after my first real drive around my test track here in Newcastle. Ill admit it did scare me...very used to it now though and want more.

chasing hp is a never ending story...i did the hill climb on the old rd coming back after the brooklyn bridge and my mate was following me, i applied the throttle in 3rd gear overtaking a fireblade exiting a corner and he told me i left 4 black lines, felt like a tiger hanging on with its paws

Have I got it right, max torque is around 4,250 rpm and max horsepower is around 6,100 rpm and it makes less than 50 rwkw at 3,000 rpm? Or is my maths totally screwed up?

Cheers

Gary

your calculations are not right, would be if it was a rgv250

Edited July 20, 2009 by Marko R1

[9krpm]

Yes it would be nice to have rpm/speed on the X-axis.

Isnt' the rpm limit at 8500rpm on that dyno print out?

Marko, Trust doesn't really advertise any power for the T517z or T618z.

It's not nice for the price that they charge for these turbo.

However I always had good results with Trust turbo so I stayed with them.

The only results I've seen around for T618z are from Uras and this chart

Sydneykid, thanks for the calculation. I was thinking the same too. I've made a lot of changes since the tune mentioned, but I will retune the car at the same boost and rpm for comparision. I will keep you guys informed.

[Marko R1]

^ there has got to be an uptodate version of the above graph...does anyone have this on hand?

for example, the t04z is not on the list

[N1GTR]

Also the T88 GK, and HKS T62

[Beer Baron]

it's an awesome result mate, just one thing and this bugs me all the time. and that's people confusing the dynos measurement of tractive effort (expressed in N) as torque expressed in Nm. that is not 930 newton metres of torque and sadly you can't really compare it to manufacturers who quote for example 320kw and 600nm of torque. it's 9000N. it's a measurement of tractive effort, yes, but it's not the same and not directly comparable or easily converted to NM. it's one thing that always pisses me off that dyno's read 'torque' in this way.

it does look to me it's making about 75kw at 3,000 and 150kw at 4,000 but by 5,000 it's making 225rwkw and is well on it's way! 6000 is making 330rkw, 7000 = 375kw and then it's making 400+ from 8,000 onwards. it would be pretty hairy from about 5,500 when the torque is ramping up hard and hitting it's peak at 6,000 or so.

it's a lot of power in a road car and will keep you entertained for a while I reckon. Greg builds great engines and I've recommended him to a number of people over the years all of whom were very happy.

[N1GTR]

Is anyone else wondering what that curve would look like with equal lift but lower duration cam profiles?

[Swiper the Fox]

Is anyone else wondering what that curve would look like with equal lift but lower duration cam profiles?

what about smaller cams, turbo's ,capacity, same dyno, same tuner, same fuel and relatively standard home built engine using only pistons, rod bolts and cams from the aftermarket catalogue?

Edited July 21, 2009 by DiRTgarage

[N1GTR]

what about smaller cams, turbo's ,capacity, same dyno, same tuner, same fuel and relatively standard home built engine using only pistons and cams from the aftermarket catalogue?

No not your motor's dyno graph Paul, just cam duration change to Marko's one

[N1GTR]

Im thinking it may be a lot nicer to drive with the power peaking lower than 8000rpm - cause how often are you at 8000rpm in a street car most days

[9krpm]

Yes some more cam information would be good

What are the cams lift and duration?

How were they dial?

Edited July 21, 2009 by 9krpm

[Marko R1]

they are 280degrees with 10.5mm lift

how they were dialled in is crd's secret, in other words i have nfi