Pump Gas Street Combination? speak up

[Curly Joe]

69 GTo, 3:55, Auto w/ holeshot 3000, 462cu,254/262@.50 112 lobe solid roller, single plane intake, bigs 750HP vac sec.6X-4 home ported.any thoughts appreciated.

[Curly Joe]

69 GTo, 3:55, Auto w/ holeshot 3000, 462cu,254/262@.50 112 lobe solid roller, single plane intake, bigs 750HP vac sec.6X-4 home ported.any thoughts appreciated.

[rumair]

what thoughts are you looking for?

[Curly Joe]

any,,,,good or bad,,hopefully good...not sure of combo. trying for optimum results. for budget and pump gas.

[BVR421]

you could try the pump gas street forum but I think most of those a more "street" oriented than you propose.

my thoughts are you have a 7000 rpm cam, will the heads support that? Will the short block support high rpms? looks like a 4.56 rear gear might go better with a cam like that.

overall it doesnt look very street friendly to me but Im partial to mild cams and quadrajets on the street

other opinions will vary

[bmpmdf]

You should be able to use pump gas, but I would think a 3.90-4.10 type gear with a 29-30 inch tall tire. Convertor is a little short on stall speed. More like a 4200 to 4500 or so if you can hook it up. I would clearly call Continenal for one of their convertors.

[Thumpin455_GTO]

Definitely a Continental converter, but I would go with an 850 carb. The gear will work, and if you have stock rods you wont like the 5800 rpm redline and 4.10 gears. I dont think iron D ports will flow enough air to rev a 462 much past 6000 even if the rods hold together.

I ran a similar 11.3:1 462, the exhaust lobe was the same size as your intake, so its a bit smaller. It had ported 670 heads and liked to be shifted right at 5800-6000. The 4.10s let it live for a while but it ran faster and better with 3.42 gears. It had a Torker II and an 850 holley dp, ran high 11's low 12's real consistent.

[Steve C.]

fwiw, my 462 pump gas motor (9.7:1) with a 254/254 @.050 solid roller ground on a 108 lobe separation used in conjunction with heads that have about a 225 cc intake runner volume makes peak power at 5800 rpm. That's with a modified Performer RPM intake, 1/2-inch open spacer and HP950 carburetor. A very nice moderate rpm motor.
With a Victor intake it will peak 200 rpm higher.

[Curly Joe]

thanks for all the great info. Steve your combo makes me feel pretty good about mine. I have the cam advanced 4 degrees and would love to bolt on a set of 85-87 alum heads. I am also using heat treated well prepped early forged rods, this engine has seen 6000 often. been thinking of putting the four speed back in but concerned with breakage, plus the little woman was having a hard time holding the clutch. http://pysales.com/images/sweat.gif

[russ467]

CJ
For what you could buy a set of Eagle rods for ($399) that can hold up to 800hp and more with the bigger rod bolts, why would you want to run old forged rods that would need to be side polished and good rod bolts to be able to withstand any kind of real power safely?

[Curly Joe]

I have benn using the "old forged worked " rods for about five years now. next engine will have aftermarket rods.I know what you mean. but back then they were the lightest strongest thing i could get with a budget. initial cost was 25.00, bolts 50.00, polished myself, sent out for heat treating 65.00, resize and true 65.00. they seem to be a tough little rod. http://forums.performanceyears.com/groupee_common/emoticons/icon_smile.gif

[a73formula]

What did you do to side polish the rods? I have a set that I was going to do this on but am unsure as to the exact process and what material to use.

Thanks

[Curly Joe]

you can start off with a drum style carbide bit then go to a drum sanding wheel. or just use the drum sanding wheel with 80 grit then to 120 grit. works pretty good for an even finish. you can get the drum sanding kit at parts or tool stores. I have one i never used still in package purchased @ Harbor Freight #42006 7.99. 20 piece 5 diff sizes.
http://www.harborfreight.com