Got Over 400kw Atw?

[NXTIME]

Has that graph been replicated by anyone else or just a one-off? What capacity?

[Piggaz]

Thats the 'big dick' RP engine.

Search "RB29 WOW".

[Rolls]

Has that graph been replicated by anyone else or just a one-off? What capacity?

Has VCAM I'm pretty sure.

[Marko R1]

how big is your exhaust marko?

its the veilside evolution system - its 95mm i think (i.e. either 3.75" or 4" from the dump pipes to the rear)

the dump pipes are large as well.

You'd want 4 inch minimum? or twin 3's haha hey Paul...

my brother has the apexi n1 systm on his trophy (last registered in 04) which runs 2 x 3" pipes, sounds very g-rough

[Piggaz]

What about in the mufflers (well the rear one). My Kakimoto had a 2.5 inch restrictor in it. What a POS! Silly jap systems!

[Marko R1]

What about in the mufflers (well the rear one). My Kakimoto had a 2.5 inch restrictor in it. What a POS! Silly jap systems!

curiosity got the better of me so i looked under the car with my vernier set...from the dump pipes it runs 2 x 2.5" front pipes (60mm) then the front pipes run into a 3.5" (90mm) collector which is about 400mm in length, the exhaust then runs straight thru @ 3.5" (90mm) via 2 middle mufflers which retain the same internal diameter. the rear muffler i looked thru with a torch & also measures 3.5" internal diameter.

this engine is running tomei poncams 260degrees @ 9.15mm.

this morning i took the car out & wanted to see exactly when i have full boost - are u guys ready for this??? 0.8bar @ 5,500rpm with gtrs's. its only on 0.8 bar until i get it retuned. huuuge difference from my rb26/30 which made full boost in half the revs.

i modified this gtr almost 10 yrs age hence i couldnt remember the exact spec of the exhaust, tell you what though, i am very happy to have it back home.

[Piggaz]

this morning i took the car out & wanted to see exactly when i have full boost - are u guys ready for this??? 0.8bar @ 5,500rpm with gtrs's. its only on 0.8 bar until i get it retuned. huuuge difference from my rb26/30 which made full boost in half the revs.

LOL! You know where they need to go? In the dumpster along with 2540's. But im sure there is a big pile of those in there already!

[Piggaz]

Just pulled out my latest graph. I hit 0.8 bar at 3400 RPM which is about 75 RPM after the dyno graph starts. RS's was 4600 RPM which was 1400 RPM after the run starts.

[Marko R1]

what is your rev limit set to?

if i look at my current power band, it is 3000rpm (i.e. 5500 - 8500)

when i think back to my rb26/30 i'd always shift at about 6500rpm which would still give me a 3000rpm powerband...although the rev limit was set to 9krpm, i always felt like i was killing it going past 7krpm as the engine was nowhere near as 'rev happy' as the 2.6ltr (i guess its changing mindset as well)

[Marko R1]

Just pulled out my latest graph. I hit 0.8 bar at 3400 RPM which is about 75 RPM after the dyno graph starts. RS's was 4600 RPM which was 1400 RPM after the run starts.

i remember doing this exercise with my 3ltr with -10's & i was getting 1 bar @ 3000rpm in 3rd gear on the street, i posted it somewhere on gtr.uk website

although, comparing a 3ltr with -10s to a 2.8ltr with -5s isn't really fair due to increased capacity

[Piggaz]

what is your rev limit set to?

if i look at my current power band, it is 3000rpm (i.e. 5500 - 8500)

when i think back to my rb26/30 i'd always shift at about 6500rpm which would still give me a 3000rpm powerband...although the rev limit was set to 9krpm, i always felt like i was killing it going past 7krpm as the engine was nowhere near as 'rev happy' as the 2.6ltr (i guess its changing mindset as well)

was set at 8600 but I never revved it past 8000. Even at Winton I was changing at 6500 - 7000. I didn't need the revs. With the RS's It needed every last RPM it could get so it wasn't so lethargic when pulling the next gear... not that it helped! From 4500 RPM I have 275 kw. Now if I changed at 8000 it will land somewhere between 5500 - 6000 RPM, thats 390-410KW after gear change, back up to 425 at 7100 and 418 at 8000.

[SimonR32]

this engine is running tomei poncams 260degrees @ 9.15mm.

this morning i took the car out & wanted to see exactly when i have full boost - are u guys ready for this??? 0.8bar @ 5,500rpm with gtrs's. its only on 0.8 bar until i get it retuned. huuuge difference from my rb26/30 which made full boost in half the revs.

So roughly 1800rpm later to 0.8 bar than a T04Z... and people compare them ha!

[Marko R1]

So roughly 1800rpm later to 0.8 bar than a T04Z... and people compare them ha!

yes - what size rear housing on the t04z are u comparing it to as there are a few combinations?

my mate used to run a single hks gtrs on his r33 gtst & that had amazing bottom end power

[R31Nismoid]

Has VCAM I'm pretty sure.

It did not have v-cam.

[GTR_JOEY]

Yea standard cams I was told with modified valves

[SimonR32]

yes - what size rear housing on the t04z are u comparing it to as there are a few combinations?

my mate used to run a single hks gtrs on his r33 gtst & that had amazing bottom end power

0.84

It just goes to show that capacity can hide dog turbos flaws but they are still dogs...

HKS 2540 is a classic example, actually not too bad on a RB25 but on a RB20 probably the worst turbo ever!

[Marko R1]

the 1.06 rear on the t04z is comparable to the gtrs's as these setups are used by robbie ward

[Ryan1200]

Has that graph been replicated by anyone else or just a one-off? What capacity?

Always a bit sceptical when theres no corrections on a dyno dynamics graph for all we know that graph could be stock turbos with 200 degrees of intake compensation.. Before xmas my car made 492rwkw on e85 and 26psi on a pretty hot day with 28degrees AirTemp 49 degrees InletTemp compensation worked in the figure i thought nice not much to go till 500 now. After having a few problems we stopped tuning for the day, 2 days later went to another dyno, tune unchanged made 460rwkw i was like

Anyway dynos tell porkies we need more mph on the 1/4 in this thread..

[NXTIME]

I'm all for the 1/4 mile dyno

[Rolls]

It did not have v-cam.

I remember there was another very nice result like that where VCAM was used, anyone remember which car it was?