rb30 mods

[rover]

i have a rb30 vl commodore with 104rwkw's with best time of 14.8

it has head work, cam,chip,zorst....

and i was wondering what else i can do to make it quicker?

without n2o or turbo!

[TIMMMAYYY]

www.r31skylineclub.com/forum

www.ozperformance.net

[geordie]

Extractors, a lightened flywheel allows you to rev up quicker thus getting you into the power band quicker, could help to cut your ET.

Induction + a partion to avoid engine heat being sucked in..........

[slip]

High compression pistons, larger bore, balanced bottom end, stiff valve springs, aftermarket ecu, higher rev limit (assuming it is still making power)

with an na, you have engine capacity, head + ancilliaries flow, and rpm as your basics.

So if you had a 3.1/3.2L spinning to 7000rpm......

(going to a larger bore may not be a good idea, i dont know, im not an rb30e na tuning and motor building expert. its a good idea but i dont know if it will hinder the engines ability to rev or something)

my rb30e is getting a bit sick....

how much did each of your mods cost, who did it, what exactly is the mod, where is peak power, whats the powerband like etc???

[rover]

how much did each of your mods cost, who did it, what exactly is the mod, where is peak power, whats the powerband like etc???

the cam is a SURECAM (btw surecam make all the cams for chiptorque, and for the rb30 hp1,hp2,hp3 it's the same cam)

headwork was also done by surecam. double springs, lifter boxes machined, port-n-polish.

104rwkw's on the chiptorque dyno, power comes on strong 2500-7000

[Jason]

depending on how much your willing to spend, you can modify the plenum chamber to 3L capacity, with twin falcon throttle bodies running off one tps (from efi ford 250 xf falcon/zl fairlane ~$80 a pop)

[Warpspeed]

Put a twin cam head on it.

[predator]

without n2o or turbo!

Turbo is probably the best bang for buck though! can probably pick up the bits you need for under $1k, and run low boost (6psi or so) on standard n/a block without too many dramas.

or the twin cam head conversion also (may as well get a turbo head put on if you're doing that).

[rover]

well i went for the twin 52mm throttle bodys. it goes better now. it goes on the dyno on the 23 show i'll post the results then. also i think test-n-tune is on the 24th so i'll be there too....

[TIMMMAYYY]

let us know how you ran at willowbank?? i heard something about a 15.2 or something worse then previously..

[rover]

let us know how you ran at willowbank?? i heard something about a 15.2 or something worse then previously..

went to willowbank and only got one run in. there was a huge storm and the event was cancelled. heaps of wheel spin and ran a 15.3.

got it tuned at chiptorque, not a lot more power, a little more topend.

the single afm is the holdup, once i get enough $$$ i'll install a mircotech.

with this setup as is i should be able to run quicker than 14.8, but with the tt/b's i have lost some bottom end power so i'll need to change diff gears....maybe

next time i go out to the track i'll put on some 14's and run standard rear suspension, should help the traction probs.

[Deano]

How much power did you gain from the twin throttle body setup?

[rover]

not enough!!!

it was only 4rwkw's, the total cost of the tt/b's was $200 plus dyno tune. so about 400 all up!

i really need to piss off the standard airflow meter! i was thinking...hole in the bonnet, round air filter, bonnet scoop.

BTW......for those that dyno there car in 3rd gear, i made 108rwkw's in 4th and 128rwkw's in 3rd.....

[Deano]

4rwkw?? that's bugger all! I've seen way bigger improvements with an XF throttle body conversion than a twin throttle setup. How was your torque? improvement? I noticed more torque with the a twin throttle setup then outright horsepower. but then again, I think the twin throttle setup is more wanker factor than anything. When you going out next?

[rsx84]

Put a twin cam head on it.

i second that, have you looked in to the n/a rb25 head transfer as it adds rpm and a heap of torque across the rev range! my flatmate has been quoted around $1300 including labor to do the swap on his r31!

[TIMMMAYYY]

RB25 head is a absolute waste of money.

this has been disgussed many times on R31skylineclub.com/forum.

rb25 head conversion gives 100rwkw on standard Rb30e. $1300 on a SOHC will give much greater results then the twin cam head will.

[Deano]

BTW......for those that dyno there car in 3rd gear, i made 108rwkw's in 4th and 128rwkw's in 3rd.....

Had my car dyno tuned (again) on the weekend. Told the operator to do a run in 3rd gear and another in 4th gear, made 1-3hp difference between the gears (less hp in 3rd). Don't know where you get an extra 20kw from changing a gear?!?

[rover]

i had it dyno'd at chip torque by Lachlan Riddel (the owner) so ring them and ask him.

btw, what did you get atw's?

[Deano]

i had it dyno'd at chip torque by Lachlan Riddel (the owner) so ring them and ask him.

Should take the car down there just for a couple of power runs and get a comparison. I was told it's more than likely the way the dyno has been calibrated.

Anyway, I've been told not to reveal my hp figure but I'll be honest with you, we did loose hp but we always knew we were going to with the mods we did.

[SKY031]

Thread here might help a bit:

*click*