So I hit a boost spike as the second turbo came on (14psi) in about -5 degrees celsius... im thinking the huge amount of ice cold pressurized air was too much for my fuel system to keep up with....

Im thinking I blew a corner seal... the car will start right up and will rev OK... but idle is really fucky... and the vaccume meter is bouncing up to 14 or so then back down to 16 in relation to engine rotation...

Needless to say Im pretty upset right now...
:S

 

The only validation you are going to get is by performing a compression test.

 

Ya Im gonna get a tester tomarrow and do just that....

is corner seal failure common?

 

Nope.

 

why does everyone make these threads before they get a compression test? if youre getting one tomorrow, why not wait until you get the results to make a thread about it?

 

Corner and side seals do not break on street cars. You either chipped or broke an apex seal, if you did anything.

 

thx guys,
Im confused now, but Ill know tomarrow...

 

just pop out one of your spark plugs and listen... no need to buy a compression tester. u should hear a chhh chhh chhh from a good rotor and chhh pff pff from a bad one.

 

Sorry this is only my first engine failure scare....
many more to come from what Ive read! :S

if I wasnt going to school, Id be building my dream set-up ... a P-port 20B N/A

 

lol I remember doing this with my FB when I was like 17 years old back in the day....
I want to get a proper reading just so I know anyways.

 

[QUOTE=RotaryResurrection;7545211] if you did anything. [QUOTE]

I never thought another man could make me smile like that
lol

 

I'm just waiting for the rx7club map sensor crew to post, "ah, check your MAP SENSOR HOSE, YO! That **** pops off mad easy son...and if it does your car will run like it is blown! ".

 

what fuel setup were you runing? stock? with or withought boost controller?

 

Im running stock fuel system, 94 octane with synthetic fuel lube
dp, efini-y pipe, intake mod, and cat back

no boost control/ecu upgrade

 

looks like you have JDM type R. I bought 95 JDM type R as well. how many miles did your engine have when you bought it and how many did have you put on it since?

 

it had 56,000 km... I drove it for a while with a ceased primary turbo, and then put about 2000 on it with the new turbos.

it now had about 60600km

 

haha... ohh god do ppl really say that?

 

1.3Ldreamcar
thats not much at all. makes me scared. mine has 60 000 kilometers already. i will install profec B boost controller for sure to be safe and run 7psi at low boost setting

 

A boost spike at 14psi in -5 celsius with stock fuel could blow a brand new angine from what I've read

7 is a little low IMO... 10 is good... not too hard on anything. BTW the boost controller won't prevent boost spiking on stock twins from what I've read.
Just go through the revs and watch the boost gauge... if its not doing anything then I wouldnt worry. mine would spike when the second turbo came on almost every time that is what has caused this **I think**

from what Ive heard about JDM FDs Id be more concerned about coolant seal failure... A couple Ive heard of have blown coolant seals, and the previous owners just traded them in instead of getting them repaired. and thus the FDs would end up in the export yard.

 

lol.

On a side note Kevin, I've seen lots of sideseals and corner seals broken on street cars..

 

what causes boost spikes are stock wastegates, or at least it's one of the main causes. Rx-7s are notorious for boost creep people... you should get your wastegates ported

 

I've read that a few times before, but Im not running an open exhaust... just an HKS dp (more restrictive then most dp's) and a (3" i think) cat-back...

I understood that was only a concern if running a very low-restriction exhaust. Ohh and I've never seen boost creep, just spike.

 

Because he thinks he blew his engine and it helps to talk to other about it. The period between thinking and knowing is the most painful in my opinion.

Good luck on the compression test.

 

This isn't Dr. Phil Online, if he wants to talk about feelings he can call his mom. I like to keep INFORMATIVE threads in this forum.

 

I will use 7 psi for low boost setting and 10psi on high setting untill i get pettit ecu. then i can hit 13for high setting. From what i read, boost controller will prevent boost spikes but not boost creeps so its very usefull. i will also install expensive gages from AEM on water temp, boost and oil pressure.

Coolant seals in the engine are damadged mostly by overheating no matter its rotary or piston.