(1) I'm looking for some feedback on what to expect out of a car I bought with this combo: '73 Stage 1 heads, no porting 1-7/8 headers SP1 intake 10:1 compression the ol' common 118 cam (poston, if it makes any difference) 1.6 ratio rockers 3800 lbs Regal body I'm really wanting to know at what ET/MPH I can assume I've reached the limits of my tweaking. (2) What ET/MPH should I expect from a head and cam swap: 413 cam hogged out iron heads (3) Would I be unrealistic to expect to drive this second combo on a 4-6 hour trip? Thanks for any real-world experience or opinions.
As long as you,re oil pressure is where it should be you could drive it for as long as you want, prolonging you have an adequit cooling system. I have drove much further with the Poston 105A and 3.73 in the back. No problems at all!
My guess would be low 12's to high 11's with that combo. But to do better, we'd need carb, gear ratio, tires. I would think the second combo would be about .3 to .4 quicker. Just my $.02.
Sorry 'bout that!ou: 3.42 gear Demon 750 (prolly need more CFM) 28" tires Thanks again for the feed-back (opinion OR real-world!:laugh: ).
Poston 118 cam 74 Non stage heads but with some porting 12:1 pistons but with stock deck height I'm probably at 10:1 SP1 intake Holly 850DP TH400 Trans 4.10 Gears 26in tires Im in the low 12's (Gtech and roasting a 12.50 stang:grin: ) Cant tell you about MPH tho... Probably around 110 or so. Probably faster If I actually took it to a track to fine tune it.
I have a 413 cam, Gessler Race-Ported heads, B4B, Holley 850, had 3.42's (now 3.08s).....and drove/drive it everywhere.....average ~5,000 highway / street miles per year. Also had a 118 cam but that was a different engine build combo. Drove that combo even more :grin: As for ET comparisons.....everything else equal I'd say between 2-4 tenths
I guess the 118's exhaust duration is such a good crutch for unported heads that that's the reason that porting and a 413 won't give all that much more? I may be happy running 2-4 tenths slower, with money in my pocket...for a little while at least!
I'm not sure 2-4 tenths would be totally accurate. It depends purely on WHO is doing the, and HOW MUCH porting is done. Just a 'light port' and bowl-blend, maybe Alan's right on with 2-4 tenths. But I'll bet with the RIGHT porting, more like 6-8 tenths!:Brow: Hell, why even screw around with that? Just get TA Alum Stage 1 SE's!!:grin:
