35\40 Turbo Advice On A Rb20?

[Mspec32]

Currently prepairing a full engine rebiuld for my rb20,pistons,cams,headwork,fule setup eg,stressing out about the turbo i got for it dont want it to be a lagy pig,has any1 put a 35/40 on a rb20 and how was it.

[dano4127]

it would be lag city mate!

S E A R C H F T W !

[huddy]

that is rather large, especially for a 20, what exhaust housing did you get and is it IW or EW?

[LTHLRB]

i have a 3540 with the smallest exhaust housing on a 25det and a stretched rev limiter to 7,500 and it wakes up late 3,000's but pulls very very hard to the limiter.

so on a rb20 it will be alot of more laggy

i would go a 3071R or a 3076R .63 for rb20

[Roy]

i have a 3540 with the smallest exhaust housing on a 25det and a stretched rev limiter to 7,500 and it wakes up late 3,000's but pulls very very hard to the limiter.

so on a rb20 it will be alot of more laggy

i would go a 3071R or a 3076R .63 for rb20

Yeh, no doubt woudl be laggy. But if ppl put them on big power SR20s then i see no reason why not an RB20. Only you would want it to be a dyno car or a drag car, not a daily streeter.

If you are running 81mm pistons for a bump in displacement, with around 9.0:1 compression. Dont go too big on cam duration, say 256 and 8.8mm lift. Stick with std inlet manifold and make sure the 3540 is running a nice exhaust manifold and is well tuned with cam gears used to dial it all in.

I see no reason why the thing wont be on song in the mid 5,000rpm range. Wil be able to rev the thing to 8,800rpm and make a good wack of power, around 320-340rwkws (depending on the turbo spec)

Worst case throw a shorter diff ratio in the thing.

Whether it makes sense to do all this to an RB20 instead of a bigger brother its hard to know and not for us to say. But if you want a more streetable setup with i would think a 3076 woudl definitely give you a better compromise of power nad drivability.

Have you looked at the Turbonetics or ITS range ?

[LTHLRB]

yeah i was assuming that it would be more laggy because of a smaller displacement engine with more pistons, so a shorter stroke? but sr20s are the same displacement with less pistons so bigger bore x stroke?

if its a streeter no way i would put that on a sr20 without MASSIVE cams and a 9,000rpm limiter, just too big of a turbo for down low power.

[esky_mad]

pffff dont listen to the RB20 haters. im putting a GT3040 on my RB20, will be slightly less laggy.

if you want response obviously its far to big, but with a full build it will be alot of fun.

two words.

do it......

there was a r32 in a recent zoom issue with a built rb20/gt3540

specs below, that motor has since expired but meh.....

To cut the list short -

Forged internals

Standard cams

Tomei cam gears (in anticipation for cams.....)

GT3540 turbo (high mount)

Turbosmart 38mm ext. wastegate (with screamer, love that sound!!)

110mm thick front mount

3 inch dump into 4 inch exhaust

Nismo 555cc injectors

Bosch 500hp fuel pump

Link ECU (upgrading to Microtech LT-12 this week)

Turbosmart E-Boost2

Alloy triple-flow radiator

Car made 293rwkw/393rwhp @ 21psi (more to come). Would post up the dyno sheet but I don't have a scanner!

Is also featured in current issue of ZOOM (# 118)

http://www.skylinesaustralia.com/forums/Rb...html&st=140

^^ RB20 power thread is the best place to look. theres another two GT30 series powered RB20's on the page after the above one.

Edited January 20, 2008 by esky_mad

[bubba]

I'm putting one on my RB30.. would never have contemplated it with the RB20 but, whatever floats your boat

[r33cruiser]

QUOTE(LTHLRB @ 20 Jan 2008, 02:31 PM)

i have a 3540 with the smallest exhaust housing on a 25det and a stretched rev limiter to 7,500 and it wakes up late 3,000's but pulls very very hard to the limiter.

so on a rb20 it will be alot of more laggy

i would go a 3071R or a 3076R .63 for rb20

same here. i have a .82 rear housing. and boost comes on at about 3200-3500.. a greddy plenum helps.

if u are after PEAK power go for it mate. but it will only last for 2000rpm..

if your after response AND decent power go a 3071R

[LTHLRB]

yeah mine comes on at around that aswell.. last time i drove it i stopped looking at the tacho and concerntrated on keeping it straight it shot up very fast fron around the 3000's thats full boost, not starting, but already at 18psi

[r33cruiser]

respect to the almighty gt3540....

if u want a kick in the pants and would be happy with a constant whiplash injury go the 3540... but as i said before on a rb20....it will only last for 3sec

it just wouldnt do it, u or the car any justice

Edited January 20, 2008 by r33cruiser

[LTHLRB]

with 25s the fun starts at mid 3,000's and lasts all the way to redline.. if your game enough to hold your foot down.

[zebra]

pffff dont listen to the RB20 haters. im putting a GT3040 on my RB20, will be slightly less laggy.

if you want response obviously its far to big, but with a full build it will be alot of fun.

two words.

do it......

there was a r32 in a recent zoom issue with a built rb20/gt3540

specs below, that motor has since expired but meh.....

To cut the list short -

Forged internals

Standard cams

Tomei cam gears (in anticipation for cams.....)

GT3540 turbo (high mount)

Turbosmart 38mm ext. wastegate (with screamer, love that sound!!)

110mm thick front mount

3 inch dump into 4 inch exhaust

Nismo 555cc injectors

Bosch 500hp fuel pump

Link ECU (upgrading to Microtech LT-12 this week)

Turbosmart E-Boost2

Alloy triple-flow radiator

Car made 293rwkw/393rwhp @ 21psi (more to come). Would post up the dyno sheet but I don't have a scanner!

Is also featured in current issue of ZOOM (# 118)

http://www.skylinesaustralia.com/forums/Rb...html&st=140

^^ RB20 power thread is the best place to look. theres another two GT30 series powered RB20's on the page after the above one.

Yes but if you read the article closely it doesnt even start to see positive pressure untill 4600rpm

Buy that time even old dak daks will have hosed you off the road.

think of it this way......nothing nothing nothing......boost...wheel spin....rev limit, change gear and repeat....

GT3076 at the most for a street car.

But its your car so do what u like.

[esky_mad]

boo to the RB20 haters.

with the right cams you can dial in more than respectable response for the loyal old beast.

remember people that youre comparing other motors to the RB20, which is kinda dumb considering there in a completely different league.

i say go for it mate. then if you dont like it change the turbo.

[esky_mad]

Buy that time even old dak daks will have hosed you off the road.

But its your car so do what u like.

in my opinion i couldnt care less if a dodgy old non turb r33 beat me, cause i know id be having a hell of a lot more fun. isnt that what modifying your car is all about.

that last comment always annoys me

my 2c.

[STATUS]

pffff dont listen to the RB20 haters. im putting a GT3040 on my RB20, will be slightly less laggy.

if you want response obviously its far to big, but with a full build it will be alot of fun.

two words.

do it......

there was a r32 in a recent zoom issue with a built rb20/gt3540

specs below, that motor has since expired but meh.....

To cut the list short -

Forged internals

Standard cams

Tomei cam gears (in anticipation for cams.....)

GT3540 turbo (high mount)

Turbosmart 38mm ext. wastegate (with screamer, love that sound!!)

110mm thick front mount

3 inch dump into 4 inch exhaust

Nismo 555cc injectors

Bosch 500hp fuel pump

Link ECU (upgrading to Microtech LT-12 this week)

Turbosmart E-Boost2

Alloy triple-flow radiator

Car made 293rwkw/393rwhp @ 21psi (more to come). Would post up the dyno sheet but I don't have a scanner!

Is also featured in current issue of ZOOM (# 118)

http://www.skylinesaustralia.com/forums/Rb...html&st=140

^^ RB20 power thread is the best place to look. theres another two GT30 series powered RB20's on the page after the above one.

meh you could do that with a TD06 and far less lag.... 293rwkw is nothing special...

[r33cruiser]

with the right cams you can dial in more than respectable response for the loyal old beast.

your a bloody idiot esky mad.

such noobieness.

just go a 3071R or a 3076R .63 for rb20

ONLY if u like driving around on vacuum would u ever go a 3540

[Sqd32]

i agree with uras on this one, the td06 is underated. on a built engine with boost above 20 psi you will crack 300 rwkws and have so much better response than the 3540. some one has to say it lol, look at roys he uses a td06 on a 20 and that thing is wicked, not even a built engine and manages 260 or so, i know which one is the better choice. but hey up to you

[STATUS]

i agree with uras on this one, the td06 is underated. on a built engine with boost above 20 psi you will crack 300 rwkws and have so much better response than the 3540. some one has to say it lol, look at roys he uses a td06 on a 20 and that thing is wicked, not even a built engine and manages 260 or so, i know which one is the better choice. but hey up to you

yup... even the baby 06 the L2 makes 265-275rwkw at 1.2bar with std eng and 256/264's and will have upto 50-70rwkw more throughout the mid. At 1.5bar with plenum and 272's it would match that 290-300rwkw and still have much more mid.... or simply get the SH 06. the 3071R is also a good option but they are soft to drive and are no match for an 06.

Im my experience there are only two choices for rb20:

td06

and HKS GT2835 0.61 52t which is the small inlet version.

[legend01]

I think I can speak here as I have a little experance with this , I currently run a gt3040R on an rb20 a built engine and I spent thousands getting it to flow its great as it boosts pretty early and is fairly powerful car ran an 11.7 at wsid ,while this is great for a track car its not for a streeter as when it comes on boost its wheel speen city even with perrilli P zero's and on low boost ,low boost it makes 240rwkw but the way it comes on is a rush of power from 3900rpm to 5100rpm it goes from about 80rwkw to 288rwkw so in 1200rpm it makes 208rwkw thats a lot of power for the rear wheels to hold

I would tend to agree with Roy and URAS ,from graphs I've seen the tdo6 has a lot more linial power delivery to the garrett turbos as they come on in a rush and the gt3540 would be worse than mine .

I dont drive my car on the street anymore as for one its just too wild and two with the new hoon laws with that sorta power delivery with out r spec tyres there aint gonna be any traction and in front of a cop bye bye car so my engine is coming out the car is going back to stock to be sold of and I've now got a gtr so got better chance of keeping the power to the ground . This is just my opinion but hope it helps

cheers Peter