450sx part 2

[future]

with the new heads and a little more boost itll be even better

[turtle m3th]

I've been debating this swap for some time now, but after seeing the nutty shit you've done with your setup i'm definitely on board now! I love the innovation and risks you've taken with the vh. Keep all the good shit comin.

[gsracer]

so put the motor off to the side and started the tear down. Decided to do a compression check before i pulled it apart out of curiosity.

Cylinders
1. 205
2. 215
3. 200
4. 200
5. 200
6. 195
7. 200
8. 205

Stock is supposed to be 185 psi warm and i measured cold so either i picked up compression or more than likely the tester is slightly off , i also measured dry without pouring oil in the cylinders, in either case rings look good. Although I'm contemplating a complete and rebuild as i was just planning on changing the head gaskets.








Popped off the valve covers and this motor is still as clean as the day i bought it. It has roughly 126,000 miles as of now.







Cleaned up the valve covers and dropped them off at the coaters I'm done with wrinkle black, I'm thinking silver or something crazy.

[93/240sx]

Awesome build man. I'm picking up a vh this weekend hopefully

[Rmetler]

I really dig your VH setup...Keep up the great work.

[gsracer]

thankss... hope to have more pulled apart today.

Im leaning towards complete rebuild. Im gonna open up the clearances and try and spin 8000 rpm.

[scottie]

Originally Posted by gsracer

thankss... hope to have more pulled apart today.

Im leaning towards complete rebuild. Im gonna open up the clearances and try and spin 8000 rpm.

That would be an awesome setup if you can produce increasing power at those rpm's. it is all about how long you can live with it down. Since winter is fast approaching I would say now is the time.

For the valve covers I would keep it classy whatever you decide.

[gsracer]

well with the cams, i was told it should make power to 8,000 so well see.

For the valve covers I'm probably gonna go with metallic silver.

[future]

Will the pro-charger make it to 8k?

[gsracer]

Well they run vortech v2s past 9000rpm in s2000s.

On my application with a 6.5 crank pulley and a 4.0 inch upper on the charger it will be spinning the supercharger at 46,800 rpms at 8,000 rpm engine speed and that combo was pushing 8-8.5 psi at 7200 rpm in the current setup, in theory at 8000rpm it should push 9-9.5 psi, again in theory as rpms go up the charger produces more boost as long as the volumetric efficiency of the motor doesn't surpass the flow of the charger.

The V2 si trim redline is 52000 rpm.

So again in theory i should be able to go down two sizes to 3.6 inch on the blower while hitting the blowers 52,000 rpm redline. Every size is about 1.5 psi more, giving me anywhere between 12-14 psi at 8,000 rpm for hopeful somewhere around 600hp.

Of course i know plenty of mustang guys that spin these things way past 52,000 rpm, some even into the 65,000 rpm range but they start to have issues after a while.

[gsracer]

so i got one cylinder head off.

As i removed the bolts in sequence and stages of course i came to one that was just not as tight as the rest. And i though hmm thats not right. I mean it wasn't loose by any means using a breaker bar they all required a pretty good tug, except for the one above cylinder 4 on the top it was just a little looser.

Anyway pulled the head and this is what i found.




Piston number 4 seems a little cleaner than the rest, towards the top near that bolt, and I'm wondering if this may have been the culprit. Compression on that cylinder was good of course.
Heres a closer pic.





Cylinder walls look great for 126,000 miles.

[GSXRJJordan]

Why's your V8 have so many valve reliefs?

Lol so weird seeing OHV V8's. Anyway, walls look great, pistons look great. Slap it back together with the new heads man, enjoy it some more, use that bottom end money to buy something cooler (or save it for when something big does happen). You're not boosting enough to need to re-ring, you don't really need forged slugs in it, that little S-trim is perfect for that engine.

[gsracer]

Jordan i wonder the same thing my self. I might just do the bearings and some rod bolts, I'm just worried about spinning a rod bearing a month after i put it back lol.

I think it maybe an anomaly for the clean cylinder i just pulled the other head and they are all like that on the other side.

[turbociv910]

It's clean because water will steam the cylinder releasing any carbon build up. Get the injectors cleaned. It was together to long to just pop. Something happened

[gsracer]

The injectors where brand new Siemens 630cc top feeds. It was running fine. 11.2-1 under boost.

[turbociv910]

Oh thought you said it's been together a while. Guess that cylinder wasn't happy. Good luck on your new build.

[gsracer]

well the injectors have been in there for like 6 or 7 months since the new manifold. It made about 50 more hp after the manifold swap.

[future]

In theory it should be fine. I say go all out and full build. But if the money is not there we can't give it to you lol

[gsracer]

its not a monetary issue its more of a laziness issue these days lol.

[4-20sx]

Yea because we're all getting old now hahah

[gsracer]

Originally Posted by 4-20sx

Yea because we're all getting old now hahah

lol aint that the truth.

it won't be a "full build" just arp rod bolts and new bearings.

[future]

Do it then!!!!! But a full build would be pointless to only boost 12-14psi

[Hoffman5982]

Sucks to hear about the hg. I've been following this since the beginning and it has always been one of my favorite s14 builds. It's good to see that you're finally going to put those heads to good use lol

[gsracer]

So decided to go through with the bottom end pulled the tranny and put it on the stand.

Twin plate love...





pulled the timing cover and the motor looks brand new inside.... Not bad for 126,000 miles. Starting to think I'm wasting my time but whatever its half disassembled. I bet the bearings look new as well. Le sigh...

[gsracer]

snapped a pic into the oil pan, you can't make it out that well in the picture but you can kinda tell how the oil pick up has been smashed into the bottom of the pan for the last two years lol....

[4-20sx]

Lol so you decided to build the bottom end. Good luck bud. I still got my vh sitting on the stand.

[gsracer]

Originally Posted by 4-20sx

Lol so you decided to build the bottom end. Good luck bud. I still got my vh sitting on the stand.

well i have all the parts already

clevite main / rod / and thrust bearings.
ARP Rod bolts
Hastings rings
and obviously the heads and cams already assembled with super tech valve springs ad titanium retainers.

Dropping the bottom end off at the machine shop on monday so it shouldn't be too long, I'm thinking about a week at the machine shop then another week to assemble and put it back in. But you know how that is.

[4-20sx]

Oh yes I know how that goes lol. I still need to install my oem intake manifold but I just moved so everything is everywhere and my engine is still at my moms house... Blah.

Good luck though. I'll def keep A tab on your thread Jerry. Def your an inspiration to the vh community haha

[gsracer]

lol thanks man.

[gsracer]

so pulled the pan...

Heres a nice shot of my smashed into oil pan pick up...... I must stress this has been like this for two years and never lost not even 1 psi of oil pressure thank god.






Nice and clean bottom end...





So pulled one rod bearing from each of the throws. And as suspected this was a big waste of time. All the bearings are clean and have minimal wear. I should have just slapped the heads back on and been done with it. But whatever what can i do.