t210thanniv

took apart the motor the other day.... though it was blow, but its not. apex seals are perfect, and housing are in good shape too... the rear rotor bearing went the outcome is as follows: Eccentric shaft, rear rotor, rear side housing, intermediate side housing all pretty much fucked. My question is since i have to replace all this, what should i go with... which iron should i use? my freind tells me i should go with S5 NA rotor (high comp), and S5 Na side plates.... What do you guys think, and what recommdations would you have. Im concerned with the high comp Na rotors that if i dont tunn it perfect the motor will have a greater chance of blowing then if i use my stock S4 rotors. I will also be doing a bridgeport. Has anyone used S5 NA rotors on T2, and if so what diff have you noticed, if any, from the stock ones....Ill post pics soon of the damaged goods....

crackheadmel

I say go with the s5 n/a rotors IF you can find them. I have one, and have been trying to get a second for 4 months.. still no luck (unless i want to spend 100+ on 1 rotor)



However the S5 n/a irons have smaller ports that have a diffrent configuration. Stick with the s5 turbo irons



-Jacob

kahren

he meant if he uses s5 NA irons to port both holes into one such as this

ArmyOfOne

BDC

That is *WAY* an aggressive bridgeport. I'm not sure if it's a good idea to use that as a visual example of a proper "extend port" because of it's sheer aggressiveness.



I'd like to know how the bearing and crank assembly failed. It's either balance (unlikely) or oil (likely) related. Can you tell us some history on the engine and everything done to it including modifications, # of miles and how hard it was driven, and then symptoms of failure?



B

vosko

sandor remember that time it was running funny and i said it sounds fucked then it ran fine for a few months........that was probably when the bearing got fucked up



this is a mazda S4 Reman with a few thousand miles on it and yeah he beats on it

93 R1

Thats one mean ******* bridge port right there

Apex13B

that port is too big, too peaky. I hated the one car i drove that had a port like that.



Get big injectors, a stand-alone and nice fuel pump and use the NA rotors, with the t2 irons and housings

93BlackFD

id trash the whole motor and start over, mine did that...how many miles were on your motor?



there is lead and bearing material EVERYWHERE in your motor, all oil passages, in your e-shaft, in your oil pump, everywhere



if you are running oil coolers, they are tarnished as well, flushing them will not do anything, not with this much damage

t210thanniv

i kinda knew it as soon as i realized i blew the motor. I starved it of oil. I drove it pretty hard tru out the week, and at the end of that week i raced somone. car was running fine and all, then i get off the exit, and the motors shaking like crazy, vac is like 9, and i was like F$#% its blown. I pull over and inspect the motor, go to check the oil and the dipstick is almost dry. ya a REAL stupid reason to blow a motor....



93 BLACK FD- how did you motor blow like this? did you starve it oil as well or was it from somthing else.



My plans are to get a haltech( done with piggy backs) full t4, and brigdeport. As of right now im going with S5 irons, still dunno which though, NA or T2, and S5 high comp Rotors.



My mods are listed under my sig