Hamza734

Hey Gang,

Is there any way to check the condition of a J-spec motor without installing it?

regards,

Hakan

bob13bt

iTrader: (9)

Sure, dissasemble it.

Hamza734

I know... but then I need to put it back together...

Anything else?

wickedkin6s44

Where did you get your JSPEC?

I'm looking to get one also...with the transmission if possible.

Normally you would do a pressure test on it.

banzaitoyota

Rebuild it! JSPECS ARE NOTHING BUT JAP JUNKYARD ENGINES THAT THEY DON'T WANT.

wickedkin6s44

hey banzaitoyota where would I find a good running JSPEC engine?

vudoodoodoo

There is a method of checking the compression w/o installing the engine and running a real compression test. I learned it from Bruce Turrentine's 13B rebuild video.
Just turn the engine. For each half turn, you should here a chug. Basically each face of the rotor will make a chug or whoosh sound. 2 rotors equal 6 chugs. If you here 6 consecutive chugs from turning it 3 whole times, the engine's compression is good.
This is what he demonstrated in the video.I am not sure how accurate this is, but I think Bruce Turrentine knows his stuff.

Hamza734

That sounds pretty weird, but I'll give it a try.

banzaitoyota

I have a bell housing I bolt up and run a starter on

banzaitoyota

FC3S.org has some coming in soon

silverrotor

iTrader: (1)

Be sure to remove the Spark Plugs first ensuring a better auditory "chug", before turning over.

Sandmeister

I wouldn't say they are all horrible engines like a lot of people say....I put a Jspec in mine a while ago, and it runs great, perfect compression, and no problems so far.

88 SE

Nothing will be more accurate than a LEAKDOWN test.

Hamza734

And what is that??

bob13bt

iTrader: (9)

A leakdown test wont work, and a cold compression test wont work because the seals dont do **** when the engines cold.

Either have faith and install it, or tear it apart. Or get one of those little cameras on a flexable rod and look in the ports. BTW I have no idea where you get those...

88 SE

I wouldnt buy an engine that had 60psi, no matter how cold it was.

dr0x

My engine was showing 90psi on the front rotor in -15C weather. I guess thats a good thing

wickedkin6s44

Where can I get a good JSPEC engine from you guys? Hook me up!

jeremy

iTrader: (1)

whats so special about j-spec engines? are they higher compression? or is it novelty?

wickedkin6s44

more of a novelty dude...and more power!

ZachSpazz

They're cheap. $900 for a longblock J-Spec engine versus $1800+ for a rebuilt shortblock.

I could have had my TII running five months ago, but I'm opting to do things right and get a professional rebuild.

ZachSpazz

Nope, and considering the condition of many of these engines, you're likely to have less power than if you purchased a good engine.

Now, JSpecs have their place. Say you're nearly broke and you just blew the engine in your daily-driver TII, then you're a good candidate for a JSpec. JSpecs also make good cores for rebuilds and for N/A-TII conversions, but other than those scenarios, they're pretty worthless.

If you are planning on going with JSpec, go with www.fc3s.org, they happen to get good batches of them in...surprisingly.

banzaitoyota

Please DO NOT post erroneous information when you have NO CLUE about what you are talking about

wickedkin6s44

yea yea damn...dude I was just kidding around...gesh. Sorry man.

Hamza734

Well can we can back to the matter at hand-

how to check the engines?

I picked one up on the purchase and want to find out the condition before installing it.