I'm going to call my machine shop on monday and see how much more it would be to enlarge the valves to the stg 1 sizing, if it's not that much more I may just go for it since I'm not sure how long it will be before I get me some aluminums
Make sure they do this the correct way.........not just a bowl hog and drop them in, they will need to rework the short turn to get things right.
Yep if they just cut them and install they will flow worse,...expect close to $500 on top of what a refresh to do it correctly Will take about 2 hrs to blend the bowls back in
To be honest I would do the bare minimum to get ut running and then send whatever extra $ you can to TA and put your name on a set of heads and just chip away at them,..thats what i do,...ive owned 8 sets of aluminum heads so far ha
Well,Larry the Wizard went 11.50 with the aluminum SI heads,roller cam and all,His motor was done by Jim here and it had 610 HP on the dino.By the way,in 1995,with the 64 Special,at 3200 pd plus driver ,the car had SI heads 11.50 compression,at EnglishTown,it was Buick day,it went a best of 97.70.Couple other guy's went faster then me.Bruno
That was my plan exactly! And any port polish bowl blending etc that I did on my own to squeeze a bit more out of them if it works then great if it it doesn't oh well I had fun in the garage and had a few beers. There's an old head guru up here who only does aluminum heads now but has offered to spend some time with me to show me how to do these irons properly myself so that should be fun hangin' with him too! Does TA do payment plans on heads? I assume they need to be paid for in full before I get them? I know there's a performance place up here where I can finance a set of AL edelbrock heads but then I have to do more work to them before I mount them, or so I've read on here.
It actually made 602 "corrected" HP with an itty bitty small roller cam. I know there is way more in my car than 11.50's, but it is way more important to me for my car to be streetable, running cool, not fouling out plugs, and getting decent gas mileage, which is why I went with a small cam in the first place. I have yet to run my car on a really good high pressure day, a good Cecil day in it's current configuration. It seems whenever I do get down there, it's hot, and the DA is 1500-2000 feet. I am not a racer, so I forget things when I do get to race. Last time, it had an oil leak from the GV, and I forgot to shim my gas pedal switch for the Holley. It short shifted and leaked. That was a wasted outing, and it was hot, but it still went 11.60's at 4100 lbs, despite all that.
I ran 11.90s on small valve iron heads...has big valve put in and went 12.50s, the screwed them up so bad it was cheaper to build s new set.......and given that to just have a basic valve job and head refresh done any more is getting close to 750 or more its a no brainer to wait put your beer money into other forms of aluminum
Yep this ^^ right here has got my attention! Build the engine while paying off some aluminums over the course of the winter I think that should be my new plan and not even bother with the irons at all
X2. If aluminum heads weren't in your near(?) future I'd say spend the money and see what you can do. Nobody is saying that iron heads can't be fast just that you have to ask yourself , do you want to spend 30%(possibly higher) of the money for a good set of aluminum heads on a temporary set of iron heads. By the way if you haven't built a car that ran 11's with iron heads then you are what I would call a newbie. With KB Stage"3" iron heads my fully streetable pump gas '65 ran solid 11's back in the 80's. A little faster when I went to the Gesslers later on. I didn't buy my first set of aluminum heads until about 7 years ago.
I barely squeezed into the 10s with my iron heads. They had decent work done, others have gone faster........but i had at least 65-70% the cost of basic aluminum heads in them.......i had to sell my iron stuff and headers off or I wouldn't have made the switch........i would had said well i have these headers so no need to spend 700 more. Well I have an sp1 I can save 400 and not need and sp2.... Bottom line is out of box se1 heads flow better than most ppl can truly get iron heads to flow, and if you wabt more you can get more out of them by either porting then......or recouping a better % of your money and buy the next level up.
I pressure test heads all the time.- used to mag them till we picked up submerged rack. Clamp em in bring air up to 25 pounds plus. Just ran some 409 heads with pinned studs that leaked at the pinned area. The repaired area on those heads are inconsistent. I have seen LS heads that were drilled in the water when removing exhaust studs. I would say update to 72 heads and leave the 430 heads where you got them. I' still mag heads and blocks. Although once after inspection of the nova block and blow gun detected the dipstick tube bore had been drilled into the water jacket. The block with the cutaway filter pad
THOSE are expensive! Bore the hole oversize, sleeve it? Or did you just install the dipstick tube with anaerobic sealer?
