[jeff5347]

Ok i have the twisted wedge trick flow heads and the in and ex dont line up. I have both valve covers off but dont know if i have the g1 or g2 and there is no casting numbers on the outside of the head and nothing on the inside where the springs and rocker arms are. How do i know which heads i have. Very frustrating?

[JOHN WILSON]

If you can post a pic of them from the top angle, I can tell you. The G1 head used a 13/23dg angle. The G2 uses 16/18 and the valves look much more "inline".

[jeff5347]

how do i attach a pic in here

[JOHN WILSON]

You'll need to have a host for the pic then post a link. You can email it to me if you want.... johndinarx@aol.com

[jeff5347]

John, i just posted the pics on pro-touring.com.
here is the link to that post with the pics. if that doesnt work let me know and i will email.
http://www.pro-touring.com/forum/showthread.php?t=21034

[JOHN WILSON]

I'm pretty sure those are G2's. I'll double check pics of my G1's tonight when I get home. I remember the intakes on my G1's sitting closer to the vavle cover rail than the exhaust valves. Yours are just the opposite.

[jeff5347]

John,
I was curious. Are these heads good? I am pulling the engine in the winter to freshen it up and was going to clean the heads with a port and polish, bowl blend and such. Are they good to keep and make good power out of or would you sell them and get something different. Have a 280hr comp cams now but was lookingt to install a bigger cam in the area of .56-.58 lift and 240-25? duration at .050

[JOHN WILSON]

Originally Posted by jeff5347

John,
I was curious. Are these heads good? I am pulling the engine in the winter to freshen it up and was going to clean the heads with a port and polish, bowl blend and such. Are they good to keep and make good power out of or would you sell them and get something different. Have a 280hr comp cams now but was lookingt to install a bigger cam in the area of .56-.58 lift and 240-25? duration at .050

Yeah, they're pretty efficient heads, as long as you have them sized to the right short block/rpm range. They respond well to porting.

[JOHN WILSON]

Jeff, here is a pic of the G1's. Notice the difference compared to yours.

[jeff5347]

oh yea. i can see the difference. What size engine is that. What are you running for parts?

[JOHN WILSON]

Originally Posted by jeff5347

oh yea. i can see the difference. What size engine is that. What are you running for parts?

That's my 422 in it's original version. I switched over to some Dart Pro-1's a couple years ago. The TW heads ran good, but were just too small for the motor. They would have been just right on a 383. The 422 now resides under my work bench.

[jeff5347]

So are you running anything in the chevelle? It looks like a pretty serious engine with the jesel belt drive. So even if i decided to upgrade this winter to a 383 the tf twisted wedges would still be ok. John thanks for helping me out to figure wehat heads i have. The stupid part is years ago before i was smarter about how to piece an engine together i traded the brodix track 1s for these heads. Live and learn.

[JOHN WILSON]

Jeff, the Chevelle now has a new 18dg sbc living between the fenders. The Track-1's would need a pretty serious effort 350 underneath them to work effectively, so going to the smaller TW head was probably a good move (or atleast a lateral move) at the time.

[Artie@TFS]

Here are a couple of ways to identify which version TW head you have:

First, there is a serial number stamped on the exhaust flange side of the head.

If the serial number is less than 80,000, You have a first generation TW.
If the serial number is more than 80,000, You have a second generation TW.

Second, If the heads are installed on an engine and you cannot see the serial numbers, Pop off a valvecover and look at the guideplates:

If the pushrod guideplates are of the stepped design, you have a G1 TW.
Or, If the guideplates are of the normal flat design, You have a G2 TW.

[jeff5347]

Ok, the guideplates arent stepped the are flat. So i have the g2's good. Artie, when i freshen the motor up this winter what are some areas that i can help on the flow. I will do some bowl work, port cleaning and such, You know, clean the sharp edges and flashing up to make the flow smoother. ALso i have looked high and low on here and the internet and can not find literature on the g2s. Can you forward to my email maybe the owners manual and any other Factory lit that will let me know the flow at certain lifts and and the type of valves and spring rates and such. I have no info on these heads as they were a trade for my brodix t1s. My email is jeff5347@yahoo.com.
Also any other info on if i go to a bigger cam what spring will fit and such.
Thanks Guys.