Top RB20 Club... do you have over 260rwkw?

[Roy]

That is part of my concern with all these cheap throttle bodies going around and why i think if i am to use anything i might go for the Q45 throttle body

[Wheezy]

Fark,

Haven't read this in ages

I'm planning to give Status a call soon so I can get a re-tune some time next month I hope.

Roy, do you think you will be ready by then? More than happy to run back to back on the same day to see if this plenum actually does anything

[Roy]

Car is still at panel beaters, then there is about 2-3 weeks at mechanics getting stuff done. I am going to do my own before after with the Plazmaman plenum. Just have to throw on the 6 boost mandiold, then trial the 20G with the 10cm housing. Then try the plenum. If its all looking good and gettign better power, spread of power and torque then i will try the cams. Then if thats all looking pretty good and optimised i will try the 25G and see how bad it is. At this stage i may pull off the bench the fancy diff i have. Will see

But i am half suspecting, even with a belly full of E85 that the 25G is too big, It may make 300rwkws for the stocker but i think it will be coming straight off and being saved with my left over Greddy manifold for a home built RB24 using my left over RB26 bottom end. Will be fun to finally have the time and money to bolt together my own engine and not be to fssed if it hand grenades

LOL, all this drama for a car when i am not even in the country to drive it

[thatjonokid]

hey guys,

never meant to rebuild my 20 but it cracked a head so i built a new one

it has

-completely reconditioned head..valve grind and seals etc

-ACL race series main and big end bearings

-Mahle piston rings

-Cometic 1.2mm metal head gasket

-Every seal and gasket replaced

-GTR injectors

-Adjustable cam gears

-Gates Racing Triple Strength Timing Belt

-Getting the ECU retuned by MRC Performance with the nistune software

now it comes to turbo...hmmmm

dont have heaps of money so i cant afford the garrett i wanted

someone through work offered me an unused KKR560 turbo for a price i couldnt refuse

IS IT TOO LAGGY? its about the same size as a Garrett 3076

I dont care if it spools up to full boost at about 4000-4500rpm just not much later?

advice pls

[Roy]

Fatz has a TD06-20G setup like mine for sale for 2k...grab it quick. Its a steal,, gate, turbo and manifold. I may be selling my 20G setup soon but i will be wanting more then 2k

[Wheezy]

Cheap as chips for $2K. I have seen suppliers wanting close to $6K new!

[Roy]

OK, so i am about 6 weeks away being back in Aus so Wheezy is the man to catch

Being away from the car for so long has allowed me to stock pile, so...hoping the following R&D will bag me some better results.

1. Wheezy has a plenum so i have grabbed a Plazmaman plenum. Plan is to throw this on first and see how the results go. If they are favourable then i may throw a different throttle body on as well.

2. From there everybody bats off over 6boost manifolds and since i plan on doing plenty of track work and an engine bay frehen up i figured i would grab one to see if i can pick up some throttle response (be great if i lower boost threshold as well)

3. Have a new exhaut system to replace my HKS Hyper, and a new intercooler to replace my HKS Type S. Hoping the ARC cooler give my RB20 every fraction of psi coming out of the TD06 and cools it a little better so i can get as much ignition and boost into the engine as possible. The titanium exhaust will be noiser but hope to get a few kws from it.

4. If the above has bagged me some more power then great, but the main aim is that the better manifold, better breathing inlet an exhaust and shorter cooler piping is to get better response. If the response has improved then i will replace the 8cm housing i have with the 10cm housing i have. It will no doubt hurt response but i am hoping to free up the top end power and end up with the sort of drivability i currently have but wth far less back pressure and less taper in the top end. Be nice if i can touch 280rwkws with the bigger housing, mostly because think the little 8cm housing is stopping me from making more power at 21psi then i do at 19psi. I get more mid but not top.

5. I am hoping the above bags some positive results as i think there is some reasonable logic to the madness. From this point on its guesswork, i have all the above ready to bolt on and trial. If its all looking good then the use of the 10cm housign means hopefully the engine is a more effecient air pump with less back pressure so figure i will try cams again. Yet to decide whether i go baby 256/8.5 cams or some locally sourced 260/9mm cams.

6. The most expensive thing to trial is going to be the most interesting. I have a spare TD06-20G which i am going to send off to get a ball bearing water cooled centre. Will finally be able to see if there is any difference in response between bush bearing and ball bearing turbos. The silly thing is i doubt this will bag much difference in power and at this point all the tuning before-afters will have added up to a hell of a lot

But, will be interesting. Hope to be able to bag about 280rwkws with 21psi before 4,200rpm and pretty improved throttle response. Of course i then need to get laptop software for my Pfc so i can get an E85 tune

Looking forward to posting up some results thru November and being able to maybe, just maybe get 300rwkws from a std RB20 (will need E85). LOL, i always have the 25G under the bed.

LOL, fark house deposits! I like my apartment and houses in the burbs will only mean a garage and a project car that will guarantee its always in pieces and i will always be broke. So spending money on the RB20 willa ctually be saving me money

[battery]

LOL, fark house deposits! I like my apartment and houses in the burbs will only mean a garage and a project car that will guarantee its always in pieces and i will always be broke. So spending money on the RB20 will actually be saving me money

hahaha

its amazing how you come to these conclusions!

[Wheezy]

Go the 9mm cams Roy, the more I read the less convinced that duration will help my RB20, hopefully 265->260 will prove to be not TOO much of a difference.

I am back on the dyno wed since I finally got my manifold leak sorted.

1.4bar if all goes well and see what it does without a leak, 280.1 or so last time with that massive leak on the #6 runner.

Cant wait to see our cars on the track together (one day, I can wish right?)

[FATGTS-R]

Cant be arsed reading back but have either of you two (roy & wheezy) tried cam gears?

[rob_mr1200]

I'm just wondering who's out there with a 20 putting out this kind of power. I've seen them every now and again, but it would be nice to have a collection in the same thread.

If you do... post up and let us know your spec list! If you are in the mid 200+rwkw range... go ahead and post up as well. If you have a dyno graph... please post it since it would be nice to see how these mods affect the power band.

hey mate i got an rb20det running shit and has miner mods..

[AD4M]

Roy the guy that purchased my last turbo setup on my 20 also ended up buying the hks cams i was using

we have back to back comparison now of befor and after as his was power tuned, then re-run after the cams went in

THEY DO WORK, i know you've been against them on here befor with your own experience.. but from my own experience and now my mates back to back (same dyno) we have seen they do make a noticeable difference on the 20's!!

HKS 9.0 264's as I had or even the local camtech drop in's work well

[Roy]

Awesome! I had less then great experiences with the Apex cams. I actually had a set of HKS cams but i think i sold them to Salad. LOL might have to ry and get them back as i was too chicken to try them

The big difference between your setup and mine was your exhaust housing size, which would have flowed much better then my little 8cm housing which would have more back pressure meaning the cams may have been trying to breath more then the exhaust housing would flow. But, if i can get the 10cm housing on mine i will try cams again

[Wheezy]

I had a set of those cheap ebay cam gears but gave them a miss.

If I do cams I will do gears too.

Probably some Trust Cam Grears, and Tomei or HKS cams. Thats if the engine holds together.

Still not convinced I will need > 256 duration, but a 9-9.1mm lift is in my sights.

[Roy]

Whats wrong with solid lifters, springs, relieving the head and some Jun 256 / 10.3mm cams and some headwork. LOL , based on how good these bottom ends are why not spend the money on a good head rather then pistons and rods. The problem is i seriously dont know who to trust to do the headwork. I think JHH in QLD or Rams in Sydney, but not sure its smart to spend 2k on a head, 3k on gear to go into it to only make 290rwkws or so?

[AD4M]

Awesome! I had less then great experiences with the Apex cams. I actually had a set of HKS cams but i think i sold them to Salad. LOL might have to ry and get them back as i was too chicken to try them

The big difference between your setup and mine was your exhaust housing size, which would have flowed much better then my little 8cm housing which would have more back pressure meaning the cams may have been trying to breath more then the exhaust housing would flow. But, if i can get the 10cm housing on mine i will try cams again

that dyno sheet is with my 2nd setup, garret gt30 with a .63 rear fitted on a high mount xspower stainless mani. not my old td06 on stock log mani

[turboedsloth]

Hi Roy sorry i didnt get back to you back in march, i ended up increasing the gate size, boost spike reduced 3psi and hp increased to 310. This is where it got crap and the 6boost gave in and cracked everywhere and i destroyed my clutch/box. car has been sitting in the garage since as the house payments take more priority than my baby unfortunately. keep us informed as to how your 6boost performs and in general how you go with the new setup. also if you plan on using the manifold i recomend perhaps getting it ceramic coated. i had mine wrapped in fibreglass heat wrap stuff and this apparently aided in it cracking.

[Wheezy]

that dyno sheet is with my 2nd setup, garret gt30 with a .63 rear fitted on a high mount xspower stainless mani. not my old td06 on stock log mani

When you say stock log mani do you mean factory, or the trust high mount?

[Roy]

Hi Roy sorry i didnt get back to you back in march, i ended up increasing the gate size, boost spike reduced 3psi and hp increased to 310. This is where it got crap and the 6boost gave in and cracked everywhere and i destroyed my clutch/box. car has been sitting in the garage since as the house payments take more priority than my baby unfortunately. keep us informed as to how your 6boost performs and in general how you go with the new setup. also if you plan on using the manifold i recomend perhaps getting it ceramic coated. i had mine wrapped in fibreglass heat wrap stuff and this apparently aided in it cracking.

What? Evrybody tells me these 6boost maniflds are the ducks guts and yours cracked? I was going to get mine ceramic coated befoer wrapping it. was told the wrpa voids teh warranty regarding cracking which i think is BS as i wrapped my so called rubbish and fragile Greddy manifold, if you track the car you have to as the temperatures under the bonnet simply get to ohigh. Hmmmm....any pics of the cracks?

[turboedsloth]

pretty shity quality but heres a couple i found of the merge collector. 2 runners further down cracked 3/4 the way round a couple of welds but i have since tiged them up myself. my mani might have just been a single incident i havent really heard bad things about them which is why i chose one.