Rb30 With Xr6 Gt35

[TiTAN]

no, thats the response of GT35's with 1.06 rears. i know, i have a GT35 with 0.82 rear on my 3L.

[JonnoHR31]

na man only looking at 1 bar or 250 to 280 is rwkw.

i appreciate what you are saying about the gt30 but it will be maxed out before i reach my goal. of 400rwkw.

So do you want 280rwkw or 400rwkw? Theres a big difference when it comes to setup....

[TiTAN]

you also have to keep in mind the XR6 GT35's run a smaller compressor than the standard garrets and max out earlier, most wont make 400kw.

[JonnoHR31]

Depends which model, all the older ones were gt3582s with 1.06 IW housings but iirc the newer models (or atleast some of them) are gt3576s.

[TiTAN]

even the older ones all had 0.5 ar T04E compressor housings unlike the generic garrett offering which has a 0.7ar T04S housing.

[Gts4RB30]

it has a 0.5 to4 front housing and 1.06 rear but i'm gonna change a few things soon to a .7 and .86 rear. John the ultimate goal will be around 400, as my weak points at the moment are the box and clutch which is going to cost around 8k so i'll save that up and get ppg gear set and nismo twin plate. so atm i'm just building it to be able to do what i want too, when i'm going to do it.....if that makes sense.

[BMYHOE]

i got a gt35 with .82 rear housing on RB3025... i seee around 1 bar @ 3200 Rpm in higher gears

[Gts4RB30]

also running 4.3 difs so it should get up and on it quicker.

[Gts4RB30]

now the turbs moved around the right way, who should i get to modifiy the waste gate actuator so that it still reads the same boost, any recommendations?

[Gts4RB30]

any replies?

[rob82]

I take it you are using the factory boost pickup point - ie the nipple at the start of the scroll? If so that point has a higher boost level than manifold pressure. The pressure difference between the two increases logarithmically with airflow rate.

If you change to manifold pressure as a boost source for the actuator you will generate a lot more boost.

[Gts4RB30]

so in turn it would also read "true" if i where ton read it from the manifold and not the turbo side of things which would allow me to adjust it accodingly for what pressure i want???

[R31Nismoid]

^^^^^^doesn't make sense as this is a 3ltr, it also has bigger cams so i'm expecting it's go to drive like a strong na off boost, and beside i've seen gt3540rs on sr20 with plenty of mid range, the turbo was actually designed for 2.5 to 4 ltr engines so being a 3 i'm kinda right in the middle, and if a rb25 will push a gt30 to 300rwkw and have plenty of mid range i can't see why a gt35 on a over sized forged rb30 would do any less justice. the engine is being built to handle a flogging.

You do realise bigger cams are actually going to make it weaker off boost yes?

It's not a high comp N/A motor you are dealing with here.

[rob82]

so in turn it would also read "true" if i where ton read it from the manifold and not the turbo side of things which would allow me to adjust it accodingly for what pressure i want???

You can use either boost source. The reason ford use that pickup point is to allow better control at higher rpm. And by better control I mean better ability to lower boost.

Edited March 5, 2012 by rob82

[Gts4RB30]

right so nismoid i would be better running the factory cams ie rb20 ones as i was only going to use stage one tomei items. Also what is the safest power level and rpm of a standard balancer as i cant find the info.

[Gts4RB30]

also i just read that when fitting studs to the mains you have to tunnel bore the mains? Well ive ground and ballanced my crank i've never heard this before is this true?

[toffy]

If you have a td06 , why not use that? It would make that sort of power and spool up earlier than most stock turbo cars . What rear housing does the td have?

[KiwiRS4T]

right so nismoid i would be better running the factory cams ie rb20 ones as i was only going to use stage one tomei items. Also what is the safest power level and rpm of a standard balancer as i cant find the info.

Not enough for you. I am running a max of 6500 to protect my stock bottom end and N1 pump but if you want to rev high you should get a better balancer.

[jet_r31]

also i just read that when fitting studs to the mains you have to tunnel bore the mains? Well ive ground and ballanced my crank i've never heard this before is this true?

yes it is

cheers

darren