Hot Rod Forum banner

1 - 20 of 30 Posts

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #1
Greetings from Maine!
I have recently acquire a hacked up 2wd 86 Chevrolet C10 stepside. So far body and mechanical are back to life and now its time to start tuning up this motor. I have a few questions I'd like to run by some folks a little more "performance" savvy then myself. Currently the motor as it sits is a 305 bored .030 making it 310ci, it has a bone stock intake and carb that are all sorts of nasty and does not perform very well. I'm told it has a "mild performance cam" so we'll leave that subject to unknown. It has a headers and good flowing 2.5" pipes down to singular flowmasters that exit behind the cab. On the budget side this is what I would like to do to pep it up and clean it up a bit and please correct me if I should be doing something different.

Edelbrock 1405 600cfm performer carb "manual choke" (is this to much carb?)
Edelbrock 2701 RPM Performer intake
Edelbrock 1721 RPM Hi Flo Fuel pump
MSD Street Fire HEI Ignition (Will this help vs. the stock?)
8mm wire and NGK V Power 6630 plugs. (Anyone running these plugs?)

I would also like to remove the stock heads and drop a set of stock 96-00 350 vortec heads on it.
It is paired up with a bone stock 700r4 and the rear end gearing is stock but unknown at this moment.
Any helps or pointers would be greatly appreciated Ive been doing a lot of research and the opinions out there are all over the board.
The reason for all the edelbrock is I've had great luck with the carbs in the past and would like to stick with their carb and the rest I would just like to match and be built to perform with each other.
THANKS in advance for any input
Justin
 

·
Music and Hot Rods
Joined
·
1,725 Posts
The carb, intake, fuel pump and MSD ignition are all wasted money on this motor. A $300.00 junk yard 350 will net you a much better running unit.
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #4
crussell85 Where is the casting number for the heads located. Is it on the flat tab behind the alternator? Or is it located elsewhere? and how do I find the compression ratio?
Greg T. Duly noted I just am in a bind for time. And as far as the parts I'm putting on this motor with the exception of the vortec heads all of these would be transferrable parts. Carb may be to little for the 350 but I can work with that. That is more of a winter time project. I'm just looking to bolt some stuff on for now to make it run well for the summer.
Thanks
 

·
Wrench Turner
Joined
·
4,952 Posts
You don't wanna put L31/350 heads on this motor.The 64cc chambers will kill your CR & power.If you are gonna use an iron OEM head,find a set of L30/305 heads.You will need a Vortec specific intake.The casting # for the heads is located on top of the heads.You will have to pull the valvecovers.
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #6
So instead of the 2701 performer intake Id want the 7116 RPM performer vortec intake? Is it a waste of my time to even swap the heads? Should I stick with stock or try these vortecs.
Any suggestions on the carb size? Is the 600 cfm to much?
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #7
Also, what can I get the l30 305 heads off for a donor vehicle 96-02 trucks and vans? Does not knowing what the piston design is create a problem when it comes to choosing the correct thickness gasket?
 

·
The mobile view is crap
Joined
·
1,876 Posts
Also, what can I get the l30 305 heads off for a donor vehicle 96-02 trucks and vans? Does not knowing what the piston design is create a problem when it comes to choosing the correct thickness gasket?
Has nothing to do with piston design. Choosing had gaskets is just another step in a proper build. You want the correct thickness head gasket while maintaining proper quench distance of .041 or relatively close while maintaining the desired compression ratio.

Do a Google search on compression ratios, quench distance, and head gaskets.

Here's a good place to start for info. http://www.crankshaftcoalition.com/wiki/Category:Engine
 

·
The mobile view is crap
Joined
·
1,876 Posts
Pull a valve cover to find the casting number. If you don't know what you currently have your not gonna get anywhere with us
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #10
Do you need the casting number off from the head thats on it or the L30? Or both? I will pull the valve cover when I get home this evening.
Thanks
 

·
Wrench Turner
Joined
·
4,952 Posts
If this was an original 4 bbl truck engine,it prolly has 601 heads.The L30 head is a lot better flowing,more efficient head.Tho not as good as the L31,it will retain your CR due to it's 58cc chambers while improving performance considerably over any other previous 305 head.They can be found on 96-2000 Vortec 305 truck/van engines.Like the L31,they are crack prone,so,if you buy used heads,always have them magged to check for cracks.You'll also wanna watch the lift on the cam to make sure you have adequate retainer to seal clearance.This clearance needs to verified on any cam over .450 lift.
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #12
Is there any way to measure the cam thats in it to tell what it is? Or would I be better off to buy a cam that is more suited for the L30 heads?
 

·
The mobile view is crap
Joined
·
1,876 Posts
If you don't know the cam, or compression ratio what makes you think it is bored .030 over? What makes you think there is an aftermarket cam in it? For all you know it could be a bone stock 305, right?
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #14
Well, I bought it from a 65+ year old man who hadnt run the truck in over a year he said that a year previous he just had got done putting the motor back in because he had it bored .030 and the machine shop had installed a different cam. He put about 500 miles on it the fall of the previous year and needed some money so I bought the truck.
 

·
Wrench Turner
Joined
·
4,952 Posts
Well, I bought it from a 65+ year old man who hadnt run the truck in over a year he said that a year previous he just had got done putting the motor back in because he had it bored .030 and the machine shop had installed a different cam. He put about 500 miles on it the fall of the previous year and needed some money so I bought the truck.
If it's an aftermarket cam,it may or may not have a # on the end of the cam that you can get the specs from.If not,I would buy a new cam & lifters that you know the specs on rather than try guessing @ the specs on it.
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #16
Thank you! I will post later when I have all the numbers in front of me and go from there. I will also be on the search for the heads this afternoon. Do you reccomend a certain cam? Same goes for lifters, anything in particular. Thanks again
 

·
More for Less Racer
Joined
·
19,888 Posts
305 Vortec head casting # is 12558059, referred to as "059" because of the last 3 digits of the casting #. Same year vehicles as the 350 Vortec heads, just used on 305's in trucks and vans.

If you already have the #062 or 906 castings 64cc chamber 350 Vortec heads, you could have them milled about .035", that would make them 5+ cc smaller chamber, and put them on your 305 using a .015" thick x 4.100" bore gasket(#1094 Fel-Pro). Good port flow without losing a bunch of compression.

059, 062, and 906 heads will all need the Vortec intake due to intake bolt pattern different than earlier SBC pattern.

Of all the new parts you listed, the hi-flow fuel pump is the least needed, a stock fuel pump should more than feed a 4-barrel on a 305 or even a mild performance 350. The distributor, wires and plugs are probably all needed on an old truck anyway.
 

·
Field Heavy Equipment Tech.
Joined
·
11 Posts
Discussion Starter #18
I dont have either vortec heads yet just the stock ones that came on it which I will get casting # off from later. Thanks for the advice on the fuel pump that will save a hundred and change not getting that. I plan on just going with the same style RPM Performer intake as before just the vortec model. How does anyone feel about the 1405 600 cfm carb? to much? or should it be fine. Thanks again
 

·
Wrench Turner
Joined
·
4,952 Posts
keep in mind to get the most from this upgrade,you wanna have all the following critical info to choose the correct matching parts,....piston type & volume in cc's...head casting#....piston to deck hgt(this can be measured after pulling heads)...camshaft specs.All this info will let you figure your SCR & DCR & give you what you need to buy the correct parts.The 600 carb will run & run OK,but,IMO,a 650 would be a better choice.
 
1 - 20 of 30 Posts
Top