Project MIDTRBO (Page 5/35)
ALLTRBO NOV 27, 06:47 PM

quote
Originally posted by mtownfiero:

3x00 heads? The only way i know how to tell is the D shaped exhaust port but i cant see in the pic though.


Yep, the 3400 heads that I pulled from a 2001 Olds Alero in the junkyard (2000+ 3100 heads are identical as well).

[This message has been edited by ALLTRBO (edited 11-27-2009).]

ALLTRBO NOV 27, 07:03 PM
Special note:

I want to say this here since it was too easy for it to get buried in the other thread:
To everyone who directly and indirectly contributed to Tyler's Toy; Thank you for your amazing efforts and thank you for making not only him smile a lot, but me as well. I'm still baffled that everything came together so quickly to make his dream a reality. You all have my sincerest respect for what you've done.

Now on that note... I apologize for starting my build thread on Tyler's build day, I had no idea about any of it until after I posted this thread. Now, of course, just because it was his build weekend doesn't mean that the rest of PFF should have shut down, but if I had known I would have waited a little longer so as to not possibly detract from the moment at all. It's not like I didn't wait a year or two as it is, what's another couple of weeks? If I had been thinking clearer I would have posted this earlier as well.

Thanks again, all of you.
ALLTRBO NOV 27, 08:09 PM
Dave sent off the 3400 heads to the machine shop near his shop to be rebuilt. They are now about as good as new. Unfortunately they had to shave them down some. I didn't really want that done, but slightly higher compression is better than a leaky engine.
Dave, you said the chambers CC'd between 28 and 28.5. I'd like more clarification on that. Do you have individual chamber measurements? Can you list them?

I didn't want the valve springs upgraded because they are only being pushed by a stock cam and I won't rev it real high, I'll save that for the real engine. For now these should be great, even with boost. If not, I'll upgrade.

Here they are all newish and sexy-like...



[This message has been edited by ALLTRBO (edited 11-27-2009).]

ALLTRBO NOV 27, 08:22 PM
Here's the TGP LG5 in its original form one last time before it got all butchered up... then made better.



Carbon and oil buildup: yummy.



The cylinders still have the cross-hatch as you can see in cylinders 1 and 3. That was a good thing to see considering that I have no idea of the mileage. I only know that Will pulled it all from a wrecked TGP in a local JY and forgot to check the mileage, or forgot what it was (I forget). *DOH*
They don't look like much, but those are the strongest pistons that have ever come in a GM 60-degree V6.
This engine will get full synthetic for the rest of its life, over time it should clean away the oil buildup. Lots of oil/filter changes ahead!

A side note: typically you don't want to switch to synthetic on a high mileage engine because it cleans the sludge buildup out and can "cause" oil leaks from the gaskets. It technically doesn't cause a leak, it just un-plugs the buildup around the gaskets that are keeping the old, hard gasket from letting the oil through. With this engine all of the seals and gaskets are being replaced so I won't have that problem. IMHO, synthetic is a must for longevity with a high-performance turbo vehicle which is driven as such.

[This message has been edited by ALLTRBO (edited 11-27-2009).]

ALLTRBO NOV 28, 10:58 AM
I just remembered that I had taken lifter valley reference pics of the Alero 3400 in the junkyard when I was pulling the heads. Unfortunately I only had my cell phone camera so the quality is poor, but I think they might be worth posting here...
ALLTRBO NOV 28, 11:13 AM
Also, here's a pic of how messy my garage was before I got the car ready to send out. You can see various Fiero parts and the 3100 intake and valve covers, and the TGP 3.1 upper intake (upside down) as well.



We're closing in on the home stretch of prior-to-this-thread updates, but there are a few more. Maybe once I continue on with current progress this build will garner more interest? It seems to be relatively dead aside from my posts (thank you to those who have posted so far).

[This message has been edited by ALLTRBO (edited 11-28-2009).]

bmwguru NOV 28, 12:12 PM
I'll be sure to keep taking pics as we are working on it for you. It will get really interesting when we are fabricating the "cool" parts
Dave
TiredGXP NOV 28, 12:31 PM
Nice project, I'll be following along....

One request - when you get around to measiuring the pushrod length for the gen 3 heads on a gen 2 block, please post them up!

Cheers
ALLTRBO NOV 28, 12:46 PM
They have been measured, but the values don't necessarily mean anything to any other engine. Differences like how much the heads were shaved, gasket thicknesses, and factory tolerances among a few other potential differences like rocker arm ratio etc. render them useless to someone else's Gen II/III. A few people on 60degreeV6.com have posted their specs but they were each different, and different than mine are as well.

For reference, mine were:
Intake - 5.875"
Exhaust - 6.200"
TiredGXP NOV 28, 01:46 PM
Thanks for that.

I realize that head shaving/block decking... will change the requirements for specific engines. I've been considering scrapping my iron heads and doing a gen 3 top swap too. This gives me a ball park for the pushrod measuement tool(s) I'll need.

Cheers