I was told today about some really good "out of the box" GM cylinder heads that flow really well. Trouble is I can't recall what they were called. It was something like "flashpoint" or "heatflash". Does this ring a bell with anyone? If so, where can I find out more info on these heads?
I recently added the Fast Burn heads to my ZZ4 with the HOT cam and GM roller 1.6 rockers. I used the Edelbrock Performer RPM Air-Gap manifold for the Vortec/Fast Burn heads. They were $550 each from Burt Chevrolet in Denver. They work great but be sure to check the rocker arm studs! On one of the heads they were not tight! They were seated and appeared to be tight but weren't. I found out immediately upon start up. They all backed out very soon on that one head. I pulled off the valve cover and was quite surprised to see a rocker/stud assembly laying there! Luckily there was no damage.(threads are heli-coiled)
Try using the iron version of the fast burn
head.. 1997-2001 V8 Vortex heads.. nearly the same flow rating and has the same heart shape combustion chambers.. Iron Vortec heads is the best for street and for your wallet..(I have seen some vortec heads on sale the bargain finder)
I am leaning towards an iron head, simply for their near-indestructibility. Sure they may weigh a bit more, but keep heavy passengers out and I think it will be OK, heh. So, in a nutshell, would these heads flow better than a fully ported and polished 350 GM head? I can get machine work done for a good price, now I just need to know if I am better to spend the coin on the port/polish or another set of heads.
CarlC, Thanks...the headers for my car were a giant pain..because of the Martz subframe, I had to use a left side 67-69 Hooker supercomp. On the right side I had to go with the 70-81 Camaro header. I had to buy 2 sets. But as far as the header gaskets go, I used the EARL'S "pressure master" for the LT1 heads which are the same port size as the Fast Burns. EARL'S #29D03B3.They work/fit great and have replaceable inserts.