deanspoors

well if it aint m.c. spinksmiester erm but you dont have a MS just a shitty 3-port turbo come back when you get some decent parts , hey why dont you go into the beginner section, go talk about fancy coloured wheels. have a look next to your username ROOKIE.....

hey guys what do you thinks faster? a nova mega 3-port turbo or a novamega 5-port turbo micheal salven....same car... ntc3


micheal you should be with the "amatuers" you cant even spell the word!! ha ha ha..

modellor

Well, on a larger faster track like Tibshelf, Wombwell or Mendip the 5-port will be far faster but on a more twistier track like Aldershot, Ashby or NWMCC (Ballymoney, NI) the 3-port will get the better of the 5-port.

MDS

just coz you have a MS it doesnt mean your going to beat me, it is all about driving m8 so go and get some practice before you play with the pro's

deanspoors

need practice? im racing you mate i dont need any practice at all! though i might try with my eyes closed!

what do you guys think? i go to where MDS "races" the only races up there are drag runs! very complicated

this kid wouldnt even race my old sts 5-port turbo

modellor

Drag racing doesnt take any great skill. Just a well tuned motor and a car that runs straight. No need to even tune the shocks etc. Just mount solid rods and the like to get the car going.

MDS - If you want to do some proper racing why not come join us guys in the BRCA Foam National Championships this year. You might learn how to turn corners with your car too.

deanspoors

hey modellor thats quite funny coz MDS (micheal) wont even race at the local! (sunderland,England) im desperate to race! MDS says he is going to get a RB Rody Roem now, i think coz he is scared of my Michael Salven but whats the point having such a fast engine in a carpark?? he says its costing him £270 and he is only 15 year old! now this is a kid determined to be the fastest!! what you want to do MDS is get some decent hop-up parts the only things he has is the ballraced steering and a RPM bumper!

eddiethefish

AMGRacer has mentioned a good point. May I insert another one about the part availability? Get the engine that you can easily find parts for it. I have both JP Black S5 and Rody RB x12, though I have to drive about 50 miles to get RB part where as it takes me 10 miles for the Novarossi.

InitialD

The S5 has a turbo scoop while the RB does not. The piston on the RB has a single ring while the S5 has double rings. The holes in the sleeve are also different in configuration hence the difference in the power band. I do believe your observations are correct that the RB is better at lower end because of the exhaust / intake port configuration while the S5 is better at high rpms due tot he turbo scoop at the crankshaft. I don't run an S5 or an RB X12 and I may be wrong on this.

ronin8451

My RB X-12 5 port has the double oil groove in the piston (not an actual ring since these are ABC engines) and it has the turbo scoop crank. Mine is the regular version, not the Rody.

Corse-R

To whom interest.

RB has on their line what is called 'BiTurbo crank' and the Turbo crank that seems that all we know.

BiTurbo crank (1700-067/R) is only used on 1700-215 and 1700-315R - the two 'Rody' versions. Turbo crank is the 1700-067 model no (single scoop)

Made some experimentation with my trusty 210 model (no turbo crank, normal plug) installing those Bi Turbo crank and doing some slight porting - Not a specialist, inspired myself viewing an image posted by motorman or smeltz some time ago on a RB 3 port sleeve - to the transfers and retouching a little the exhaust with my trusty dremel and some bits.

Differences were NOTABLE. Engine has much power than previously having a very strong midrange and gaining high rpms without losing the low-end that characterizes the 210 model.

For those who seems that burning 400 US$ is too much may interest paying 50 or 60 bucks for this crank and got more Zoom from their engine. If isn't enough for the very hardcore racers, ever you can buy a 315 model and install the crank on those engine, basically you have a Rody 5 port without the modified carburetor.

I will not be tired of warning for those all who may think that slapping a 5 port turbo engine on their car that get better performance than a well tuned engine/carb/exhaust 3 port combo.

Mine tests with the two Rody engines showed that the 5 port engine is only 2/10 of sec faster on the same conditions (same fuel, same car, same driver, same day) to the 3 port. Only noted a greater low-end and a slightly more fuel burning rate on the 5 port.

ronin8451

That is true, that crank is also slightly lighter also (due in large part to the material that is machined off for the larger intake window and the crank counterweight being machined). A little bit here and a little bit there makes a big difference on how these engines run!

modellor

That is true Corse-R.

Technically speaking, any engine regardless of the number of ports has effectively only 3 main transfer in ports and an exhaust port. The extra ports only help direct the fuel flow to the necessary places to maximise the flow. The real difference in power comes from altering the timing etc. No matter how many ports you have the fuel can still only enter and leave at the same rate.

On a tight twisty track a well tuned 3-port engine will eat a 5-port or 9-port engine easily. The higher number port engines only really show on really large tracks.

InitialD

Sorry, oil grooves is what you call them

I may be wrong on the existance on the turbo scoop but I'm pretty sure about the single oil groove on the piston. Strange. Did you buy it new or used? Unless you recently made a change in the piston of the RB engine from a Nova one...

InitialD

Yes, I believe I remembered asking Dennis about which mod in the engine makes the most noticeable power difference... I thought he mentioned that the mods to the sleeves contribute only 3% and the rest of it comes from the mods done to the head button and crank.

ronin8451

Initial D: Nope fresh engine, 12 tanks thru it. I bought it about 6 months ago, just never ran it before last November. I changed out the button to a standard plug and changed to a Nternational Nitro 11 fin head. It had a threaded crank since I first ran it in a dirt Sprint car, and I changed out the crank to the SG last week. The crank is not worked though like the Rody or Salven crank. My friend's new Rody 5 port has 2 grooves also.