did i blow something up?

[sunnys14]

i was driving on the freeway earlier and this 350z owner comes up and the passenger laughs at my car. i get kinda annoyed and let him hear the sound of my hks ssqv shriek. he immediately downshifts and i take off after him. i smash him ofcourse... right after i let down, ALOT of blue/white smoke comes pouring from my exhaust. my engine starts to idle rough but its constant at 750rpm. i pull over on the next exit and pop my hood. OIL everywhere! it was coming from the breather. at first i thought i just blew a hose coupler from the intercooler piping so i check all the couplers and they seem fine... the engine is shaking side to side... so i shut the hood and make my way home. the whole time driving home SMOKE comes pouring out my exhaust! whats going on? did i blow something up? i hope not... i have a boost designs stage 1 with FMU if that helps

[virus77]

Might be ring lands, head gasket, do a compression test. Most likely you blew something (ring lands are my bet like usual). Looks like its time for a rebuild and some real fuel management.

[uncle_louie83]

if all your compression numbers are really low...its prolly headgasket....if you have a high number...or maybe 2 or 3 high numbers and 1 number is really low or 2 or 3 numbers are really low...then its prolly ringlands...and that meens its time for a hone and new pistons. u should really ditch the FMU...atleast get an safc and i hope you have an upgraded fuel pump...if not then that might be a big factor into you blowing up your motor...how much boost are you running...if your running over 7lbs then thats another contributing factor because the fmu isnt consistant with more than 7lbs...lets hope its a headgasket...cause if it is...then go buy a cometic headgasket. but please upgrade that fuel system before you blow your motor up again.

lewis

[Checkered-Member]

Bluish white smoke suggest you are burning oilOil in the breather suggests that pressure from the cylinder is going past the rings into the crank case and out the breather.And since the KA is known to have crappy ring lands...virus is correct.

Let a lesson be learned FMU's are not real fuel management.

[sunnys14]

il do a compression test soon... 91 octane is too crappy for 100+ degree weather here in california. this KA motor had perfect compression and only 25k miles when i first bought it

[virus77]

Ya I really dont get on the gas on the way to and from work becuase the heat just sucks, the damn car doesnt perform half as well anyways so I always "try" not to get boost happy in the hot cali weather.

[HolyShiznit]

Whoa whoa whoa whoa, you were running the motor hard in THAT high of temperatures??? Geezuz H. I have a built motor with all the bells and whisltes, wideband, etc and I don't push boost on it unless the temp is below at LEAST 85 degrees.

With my past experience you blew your ringlands for sure. Doesn't sound like a head gasket at all and oil everywhere from the breather = ring lands and not headgasket, do a compression check but I am pretty sure you are gonna need new pistons. Sorry bro.

[sunnys14]

looks like i blew the rings for sure... hehe KA-T was fun while it lasted. my friend's SR ran a 13.7 at the track and i beat him by 2 car lengths so im pretty sure i would have a lower time than that. anyone recommend what pistons i should get? anything else i need?

[HolyShiznit]

I am using SuperTech 9:1's .20 over in my motor. Be prepared to spend a ****load on your motor, since you have to open it up, please please do it right, save up cash and stuff it with the proper stuff. Any of the aftermarket pistons will work, if you are financially strapped get the most cost effective, oh and ORDER FROM A BIG NAME COMPANY. I ordered from Boost Designs like 4 months ago and it took 2 months for them to get to me.

[sunnys14]

so pistons and rings are the only thing i need?

[HolyShiznit]

Well most likely you will need to bore out the block and then while your in there get new bearings, surface the block and the head if possible, get a new headgasket, have your stock rods remachined, ARP rod bolts, ARP head studs, the list just gets longer from there....... Trust me while the motor is open just do it right.

[virus77]

and with the pistons and rings comes alot of machine work, possibly bearings while you are in there. While the motor is yanked from the car consider any new parts you might want to put on the car like new oil pump, water pump, timing chain and seals, Im selling a few of the items if you are interested.

[sunnys14]

this motor only has like 25k on it so is it necessary to get all those parts like bearings and stuff?

[C-Kwik]

Whoa whoa whoa whoa, you were running the motor hard in THAT high of temperatures??? Geezuz H. I have a built motor with all the bells and whisltes, wideband, etc and I don't push boost on it unless the temp is below at LEAST 85 degrees.

With my past experience you blew your ringlands for sure. Doesn't sound like a head gasket at all and oil everywhere from the breather = ring lands and not headgasket, do a compression check but I am pretty sure you are gonna need new pistons. Sorry bro.

Really depends. If the motor was tuned for the worst case scenario, then it should not be a problem. I ran a track event at some 95 degrees and didn't have any issues.

[C-Kwik]

Let a lesson be learned FMU's are not real fuel management.

They are not the best solutions, but as long as it is able to provide enough fuel for the boost you are putting in, it is perfectly safe. It will tend to run too rich in some areas but it does not blow motors, in that of itself.

[HolyShiznit]

C-Kwik, you are right. However I assumed that he didn't have a fully upgraded cooling system. I personally am running on a Nismo Thermostat and two 12" electric fans (stock radiator). I know that it's a bandaid and when I get the money I will get a radiator. However I still hold that you shouldn't make your car perform under strenuous conditions if you can avoid it. I could just be gunshy about my my motor.

Best of luck with your build.

[sunnys14]

im runnin a nismo thermostat and dual electric fans just as you are holyshiznit. i guess i shouldnt be hitting boost all the time in hot weather anyways... stupid KA piston rings

[virus77]

its not the rings, its the pistons ring lands that hold the rings. If it makes you feel any better mine blew a while back, welcome to the club.

[uncle_louie83]

if u cant afford a motor build right now...get another motor and slap it in....but get some god damn tuning my friend...please? lol

on a side note....u can take the bad motor out and build it up over time too....how much boost were u running on that motor? if its over 7 then your in the danger zone...and since it was a hot *** day out...your injectors were prolly maxed out since the fmu just keeps shoving fuel and you might have also had some detonation too...never know...id take your injectors to a shop and have them looked at.

here are words of advice from expierience...

i had an 89 honda prelude si...i turbocharged it..FMU...14b turbo...SMIC...i was running 9 to 10psi....my ring lands blew....and they did 3 months later...and here is why

stock injectors were 240cc.stock base fuel pressure = 40psihad a 12:1 fmunow do this12 X 10 =120

base fuel 40 psi + added fuel 120psi = 160psi

160 divided by 4 (injectors) = 40psi total fuel pressure (per injector)

stock fuel pressure divided by 4 = 10psi base (per injector)

i was working the stock injectors 4 times there maximum....fuel was being dumped by the masses which isnt good...stock timing didnt help at 10psi either and the way i beat up on that motor wasnt funny either....ringlands went by by....all 4 of the pistons were destroyed....

lewis

[Checkered-Member]

They are not the best solutions,

This would explain the hole in the piston

[sunnys14]

so i should get some wiseco pistons and thats it?

[Checkered-Member]

so i should get some wiseco pistons and thats it?

Well it could be just a blown ring…so that’s a 20buck replacement if you do it yourself…do they sell one set of rings?…anyway…open up the motor and see the damage before buying anything.

How’s the compression test?

[sunnys14]

anyone know how power the stock connect rod can hold? do they hold boost well? i didnt have a chance to do the compression test yet... been working all weekend.

[95_240sx]

Whoa whoa whoa whoa, you were running the motor hard in THAT high of temperatures??? Geezuz H. I have a built motor with all the bells and whisltes, wideband, etc and I don't push boost on it unless the temp is below at LEAST 85 degrees.

With my past experience you blew your ringlands for sure. Doesn't sound like a head gasket at all and oil everywhere from the breather = ring lands and not headgasket, do a compression check but I am pretty sure you are gonna need new pistons. Sorry bro.

Why? If anything, it would be better to stand on it in warmer weather, given you have the cooling capacity for it, mainly because hot air is less dense, therefore you will run richer. I was at the track all day today in 90-100deg ambient temps, who knows what it was on the track, and I was boosting 34psi all day long. We were also boosting that much on the dyno, and it was between 93-99 deg in the shop.

Rick

[C-Kwik]

Why? If anything, it would be better to stand on it in warmer weather, given you have the cooling capacity for it, mainly because hot air is less dense, therefore you will run richer. I was at the track all day today in 90-100deg ambient temps, who knows what it was on the track, and I was boosting 34psi all day long. We were also boosting that much on the dyno, and it was between 93-99 deg in the shop.

Rick

Actually, no. While the air is not as dense, the MAF automatically compensated for density. A hot wire MAF works by metering the voltage needed to maintain a designated hot-wire temp when air runs across it. Air that is less dense will carry away less heat from the hot-wire. The ECU will know how much air the motor is actually getting. Hot air also lends itself to a hotter charge out of the turbo as it is staring with hotter air. Secondly, the intercooler is not able to bring the temp down as effectively. The primary cause of detonation is heat. Simply put any motor, incuding turbo motors, are under harsher conditions in high heat.

[sunnys14]

yes! we all know that heat is bad for motors... lets get back on subject? do you think my stock rods will hold with upgraded pistons and rings?