Ok guys. I need a little help here. I got these heads in mint condition and sent them to Warren racing engines and had them ported and polished all the way thru and went from single to dual vavle springs up to .601 lift. http://www.trickflow.com/partdetail....2&autoview=sku that cam is in it with these pistons http://www.trickflow.com/partdetail....L&autoview=sku. The block is a GM bowtie with a Eagle forged 383 crank with Eagle ESP 5.7 rods. I have Crane gold series rockers 1.5 but I wanted to go with some Scorpions 1.5 intake and 1.6 exhaust, but I have read all kinds of threads with problems with these heads wearing out valve guides and problems with pushrod lengths. Im scared to death to drop this motor in and take a chance at tearing some S*** up. I got about 10 k in this motor. This motor will also be Procharged by ATI. Yes its a street car. Can I run the Scorpion Rockers and what push rod is recommended? Is this too much cam for these heads? Should I junk this setup? Here some pics hope you enjoy. Thx

http://i39.photobucket.com/albums/e1...Picture197.jpg

http://i39.photobucket.com/albums/e1...Picture195.jpg

http://i39.photobucket.com/albums/e1...Picture201.jpg

http://i39.photobucket.com/albums/e1...Picture205.jpg

http://i39.photobucket.com/albums/e1...Picture212.jpg

http://i39.photobucket.com/albums/e1...Picture217.jpg

http://i39.photobucket.com/albums/e1...Picture220.jpg

 

Bobby Warren?

If so ask him.......they know whats going on, they have some fast stuff out there

Wearing out guides is a geometry problem.

Get a good set of pushrods. Your builder should be able to answer all of this pretty simple questions but We don't know all the details etc. of the whole set-up

 

You have a set of the G1 TW heads.

Here are the differences between the G1 & G2:

G1: 180cc intake port, 64cc chambers, 13* intake / 23* exhaust valve angles, 2.02"/1.60" valves (shorter than stock GM length), "Stepped" pushrod guideplates.

G2: 190cc intake port, 67cc chambers, 16* intake / 18* exhaust valve angles, 2.02"/1.60" valves (.050" longer than stock GM length), Flat pushrod guideplates.

Also, The sparkplug location/angles are different between these two heads.

There are some other differences, but these are the biggies...

One thing to keep in mind is if those pistons are for the G2 heads (And the pics pretty much do confirm this...) you may end up with a possible piston to valve clearance issue with that camshaft as the valve reliefs will not match up bewtween the two versions of the TW design.

As a minimum, you want to have .080" intake / .100" exhaust valve to piston clearance.

I cannot tell for sure from the pics, But you must make sure that you install a headbolt washer underneath the rocker stud if you are not going to use the guideplates (Am I correct in assuming that you are going to be using a self aligning rocker arm?). If you do not install a washer the rocker stud height is not going to be correct and you also run the risk of gouging the heads.

The intake rocker stud hole protrudes into the intake port, make sure you use a high quality thread sealer to prevent sucking oil past the rocker stud threads. A thread locker will not seal the rocker stud threads. If you decide to use a thread locker I can pretty much guarantee you that an oil consumption issue will arise shortly thereafter.

Since you have a set of the centerbolt valvecovers, make sure you get a set of the narrow body rockers as the wide body rockers will not have sufficient clearance for the valvecover bolts.

When those heads were ported, did they upgrade to bronze valveguides?
If so, what is the valvestem-to-valveguide clearance?
How much boost are you going to be using?
Where was the installed height set at (1.780", 1.800", etc...)