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Topic Review (Newest First)
07-08-2012 11:56 AM
dirtyfingers Eyes opend, thanks, did not think I could see them.
07-08-2012 11:38 AM
painted jester
Quote:
Originally Posted by dirtyfingers View Post
I am going to look into all of the answers. I took the truck on a run,[10 mile round trip] and had a buddy follow me and this is what we found out. When I did 30 he said he was going 25, I 55 he 40 . The shift from 1'st to 2'nd was at 14 mph on my speedomiter, 2"nd to 3"rd on my speedomiter was 24. We also confermed that I have a posi. rear end. I am going to chech oil and put in 30 wight royal purple,also check lift and I dont think it has roller lifters but I should check. To check this can I use dial indicater on top of lobe? Should it hang up on top of lobe longer, with it's profile? Thanks againe for all help.
Get a flash light and look through the push rod hole in the head you will see the lifter and the intake and exaust lifters are connected with a fulcrum you cant miss it!! if you see the lifters connected you have rollers!


Chris
07-08-2012 11:24 AM
dirtyfingers I am going to look into all of the answers. I took the truck on a run,[10 mile round trip] and had a buddy follow me and this is what we found out. When I did 30 he said he was going 25, I 55 he 40 . The shift from 1'st to 2'nd was at 14 mph on my speedomiter, 2"nd to 3"rd on my speedomiter was 24. We also confermed that I have a posi. rear end. I am going to chech oil and put in 30 wight royal purple,also check lift and I dont think it has roller lifters but I should check. To check this can I use dial indicater on top of lobe? Should it hang up on top of lobe longer, with it's profile? Thanks againe for all help.
07-08-2012 09:46 AM
cobalt327
Quote:
Originally Posted by dirtyfingers View Post
thanks for the reply.After the secondaries are secured shut,will there be a problem with the fuel in the rear bowl ,and would it help to change the 1.7 roller tip rockers that came with the truck to 1.5 roller tip rockers I have hanging in garage,would this help with fule cunsumption
Are you sure the rockers are 1.7? And if you are sure, are you also sure the rockers are for a small block Chevy? The reason I ask is the SBC come w/1.5 and you don't often see 1.7 rockers being used on a SBC. They do come stock on some Ford and BBC engines, though- but those will not fit a SBC head.

A 1.6 rocker can give you slightly more area under the curve, so could potentially have a positive effect on performance AND mileage. But an accurate set of 1.5 ratio rockers would be my first choice for ease of use and reliability.
07-07-2012 11:32 PM
painted jester
Quote:
Originally Posted by dirtyfingers View Post
I was probebly typing as you were. I will check the lift and let you know. Also was told converter is stock and it drives ,from stop and through gears fine. The 350 trans was beefed up for raceing and before I got the truck it had a race engine in it but my brother took out for his project. Then he sold truck to person I got it from and that person got a engine for it but no one knows what it is eccept for what I said earlier. Broke in engine by one hr at 1800 rpm's than seated the rings by loading and unloading for 30 minuts,probebly not more than45 miles on engine. The thing runs goog,strong,no oil leaks temps. good,and on boging or hesitation.If the dial indicater reads around stock cam, and I put 1.5's for rockers,whith the right push rod geometry, will this help on gas consumption?

It would reduce valve spring pressure reducing some load and friction and decrease total lift at the valves reducing a little of the load on the cam lobes and lifters! it may be so minuet you wouldn't know it? do you have roller rockers (1.5s) to replace the 1.7s with ,of the same configuration? you may need to get different push rods of the proper length or lash caps depending on where the roller rides on the valve stem tip! If your running 20/50 oil and change to 10/30 it will help! But with only 45 minutes on the engine loaded I would run strait 30 with good zddp content for a few hundred miles and then change to a multigrade and keep running zddp! You can check tire pressures, a little more air can give better mileage but don't over inflate! As the engine breaks in during the 300 hundred or so miles and the engine loosens up your mileage will increase! running a 185 thermostat would help, the small blocks had a 185 to 190 optimum operating range! High pressure oil pumps cause poor mileage a 80 pound oil pressure takes a lot of torque from the engine whats your oil pressure? Whats your mileage when you check it?

Chris

Are you running a new carb? Check your vacuum at idle if that cam has a large duration and low vacume your power valve may be opening at idle! or it could be blown from a back fire if its an old carb? If its blown you can screw the metering screws (on each side of the front metering block) in all the way and if the engine keeps running the power valve is most likely blown if it stalls the valve is good!
07-07-2012 10:41 PM
dirtyfingers I was probebly typing as you were. I will check the lift and let you know. Also was told converter is stock and it drives ,from stop and through gears fine. The 350 trans was beefed up for raceing and before I got the truck it had a race engine in it but my brother took out for his project. Then he sold truck to person I got it from and that person got a engine for it but no one knows what it is eccept for what I said earlier. Broke in engine by one hr at 1800 rpm's than seated the rings by loading and unloading for 30 minuts,probebly not more than45 miles on engine. The thing runs goog,strong,no oil leaks temps. good,and on boging or hesitation.If the dial indicater reads around stock cam, and I put 1.5's for rockers,whith the right push rod geometry, will this help on gas consumption?
07-07-2012 09:53 PM
painted jester You may have rear gears for a lugger like 4.88s, the cam could be retarded or a top end grind (not officiant till high rpm), you may not have enough initial or total advance. starting at the carb. to save gas is not where I would start. did you install the 1.7 ratio rockers? can you put a dial indicator on the heal of the rocker (at the push rod) and give us the lift of the cam lobes I&E? How many miles on this engine since you assembled and started it? Is it a roller or flat tapit ? If its an automatic does it have a stall converter?

jester
07-07-2012 09:49 PM
dirtyfingers I was able to upload some picturs to my profile but I still havent found out how to upload on question page
07-07-2012 09:18 PM
dirtyfingers Yes, just got it. the engine was a new rebild about eight yeas ago. No one had the slightest idea what was done. I got it at the right price so I took a chance. When I got the truck,[1969], I didn't have a lot of $$ to spend on. The engine was sitting in truck,no wires,moter mounts not bolted,and the carb was just sitting on top.Out of my garage I put it together with stuff I had, even welded my own dual fuel line,it had rubber hose all over it. I even made my own air cleaner standoff from a folgers coffee can and vacume line. I wanted to know a little about what was done,so I pulled the engine and on the stand pulled the oil pan. There was no oil in every thing was dry and tight. The crank was marked 10 over on mains and rods.Also it was,[by the numbers a 1969 327 or 350 block].In any case it was a two bolt main block. Not having a lot of $$ I just checked the touqe on each and put back. Wanted to pull heads but didn't want to buy head gaskets, bolts were tourqed good.The heads are 194's. All I wanted to do with this truck was to go get stuff with it, Not spend a lot on mony that I need for my other project,a 62 chevy stepside. That's my story and if I knew how, I would show pics. but I only know how to put them on my prfile. Hay, thanks for all the help, Im new to site and hope to be on a lot without to many dumb questions.
07-07-2012 07:13 PM
painted jester
Quote:
Originally Posted by dirtyfingers View Post
thanks for the reply.After the secondaries are secured shut,will there be a problem with the fuel in the rear bowl ,and would it help to change the 1.7 roller tip rockers that came with the truck to 1.5 roller tip rockers I have hanging in garage,would this help with fule cunsumption
It takes just as much fuel and air to go 60 Mph at 2000 rpm wether its a 4 barrel 2 barrel or 8 barrel the difference is your foot Leave the 1.7s alone If you had valve train work you may have custom sized push rods and other mods!!! Did you just get this truck 1.7 ratio rockers What rear gear in this thing and diameter tires are you running what cam? If you just broke it in how many miles on it since initial cam break in


Jester
07-07-2012 05:39 PM
dirtyfingers thanks for the reply.After the secondaries are secured shut,will there be a problem with the fuel in the rear bowl ,and would it help to change the 1.7 roller tip rockers that came with the truck to 1.5 roller tip rockers I have hanging in garage,would this help with fule cunsumption
07-07-2012 04:07 PM
painted jester You would be better off going to a heavier spring in the secondary vacuum diaphragm so it open's later. but you can disconnect it at the bottom of the secondary vacuum actuator where it hooks to the secondary linkage! its a good idea to tie it closed so it cant accidentally open and stick ! Then you will be running off the primary's!

Jester

I see 327 already gave you a good answer! While I was typing LOL
07-07-2012 04:01 PM
327NUT Easy...keep your foot out of it, also install a stiffer secondary diaphram spring so they won't open as easily. The first is much easier.
07-07-2012 03:26 PM
dirtyfingers
holly carb

can any one tell me if you can stop the secondaries from opening on a 650 holly with vacume secondaries. I want to run on the tinny primaries to save gas. I was thinking of blocking fuel to that side, [it's a dule inlet carb], but i did't know if it would mess up somthing. And no I can't aford to by a two barrel and intake manifold just now. I just started,broke in engine, but cant aford it,it suck the fuel. Thanks for any help

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