350 rebuild
January 21st, 2009, 01:57 PM
#2
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Join Date: Mar 2007
Location: Pittsburgh PA
Posts: 80
Rebuild
All depends on what you are going to do with the engine.
If you take it to a machine shop or not.
I am in the process of rebuilding mine and have spent well over 2000.
His kit price was around the same price as summits but. all the work they
do adds up.
plus be carfull what cam you pick with thoes pistons, they are flat top
and will take your comp. to around 10.1 to 10.5.
If you take it to a machine shop or not.
I am in the process of rebuilding mine and have spent well over 2000.
His kit price was around the same price as summits but. all the work they
do adds up.
plus be carfull what cam you pick with thoes pistons, they are flat top
and will take your comp. to around 10.1 to 10.5.
January 21st, 2009, 08:43 PM
#3
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Thread Starter
Join Date: Sep 2008
Posts: 78
All depends on what you are going to do with the engine.
If you take it to a machine shop or not.
I am in the process of rebuilding mine and have spent well over 2000.
His kit price was around the same price as summits but. all the work they
do adds up.
plus be carfull what cam you pick with thoes pistons, they are flat top
and will take your comp. to around 10.1 to 10.5.
If you take it to a machine shop or not.
I am in the process of rebuilding mine and have spent well over 2000.
His kit price was around the same price as summits but. all the work they
do adds up.
plus be carfull what cam you pick with thoes pistons, they are flat top
and will take your comp. to around 10.1 to 10.5.
January 21st, 2009, 08:59 PM
#4
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Thread Starter
Join Date: Sep 2008
Posts: 78
All depends on what you are going to do with the engine.
If you take it to a machine shop or not.
I am in the process of rebuilding mine and have spent well over 2000.
His kit price was around the same price as summits but. all the work they
do adds up.
plus be carfull what cam you pick with thoes pistons, they are flat top
and will take your comp. to around 10.1 to 10.5.
If you take it to a machine shop or not.
I am in the process of rebuilding mine and have spent well over 2000.
His kit price was around the same price as summits but. all the work they
do adds up.
plus be carfull what cam you pick with thoes pistons, they are flat top
and will take your comp. to around 10.1 to 10.5.
January 22nd, 2009, 09:04 AM
#9
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Posts: 78
http://store.summitracing.com/partde...1&autoview=sku
here you go guys, let me know how you feel about this kit
here you go guys, let me know how you feel about this kit
January 22nd, 2009, 09:27 AM
#11
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January 22nd, 2009, 09:28 AM
#12
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January 22nd, 2009, 04:08 PM
#13
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Join Date: Mar 2007
Location: Pittsburgh PA
Posts: 80
pistons
I am not sure the part number of the pistons, but when I got them they were the flat top. I thought that was good untill I did some reserch and found that the cam I picked had the intake valve closing at 35 degrees abdc.
That woul give me a dynamic cr of around 9.5 - 1. way to high to run on pump gas. So I had them machine a 6cc dish to give me 9.5 cr and a dynamic cr of 8.8, which is at the limit of 91 octane.
Sealed power does sell a piston with a 6cc dish, but you have to see all the specs on your cam.
That woul give me a dynamic cr of around 9.5 - 1. way to high to run on pump gas. So I had them machine a 6cc dish to give me 9.5 cr and a dynamic cr of 8.8, which is at the limit of 91 octane.
Sealed power does sell a piston with a 6cc dish, but you have to see all the specs on your cam.
January 22nd, 2009, 05:27 PM
#14
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Join Date: Nov 2008
Location: Central Fl
Posts: 7,971
350 build
If you're taking everything to the machine shop and having the crank ground, rods reconditioned etc., have you thought of going with aftermarket rods, (6.2 SBC) and a 400 piston? Parts are cheap and you end up gettnig better stuff for the same or less money. Just a thought.
Also, although I'd lie to see a bigger split between the intake and exhaust duration, the 22-25 cam should be fine but please don't limit yourself to Mondello/Engle grinds. There are alot of other good cams out there.
Also, although I'd lie to see a bigger split between the intake and exhaust duration, the 22-25 cam should be fine but please don't limit yourself to Mondello/Engle grinds. There are alot of other good cams out there.
Last edited by cutlassefi; January 22nd, 2009 at 05:37 PM.
January 22nd, 2009, 07:16 PM
#15
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Location: Edmond, OK
Posts: 16,465
going with aftermarket rods, (6.2 SBC) and a 400 piston?
A Summit rebuild kit is just fine if you want a daily driver/weekend warrior.
January 23rd, 2009, 05:49 AM
#16
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Join Date: Aug 2007
Posts: 2,250
True, but here is the option Mark was suggesting. For $500 you can get a new after market SBC rod and forged pistons. It will probably cost more to get forged Olds pistons, press off the old pistons and recondition 35 year old rods. Rod bearings and possibly rings will probably end up being cheaper, too. There is the additional cost to bore to 4.125" (which gets you a few more cubes and unshrouds the valve a little better) and grind .025 off the crank, but in the end you have a nice little combo. So, it is just another option, that's all, nothing radical.
January 23rd, 2009, 10:50 AM
#18
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Join Date: Mar 2007
Location: Pittsburgh PA
Posts: 80
Rebuild
The best thing I learned (and i only have build three motors), Is to
let your machine shop know what you want and what you plan to
do with the car. A good one will work with you and they know alot more
than you do (its there job).
I haven't ran my 350 yet but I am very confident that it will be just what I
wanted it to be.
let your machine shop know what you want and what you plan to
do with the car. A good one will work with you and they know alot more
than you do (its there job).
I haven't ran my 350 yet but I am very confident that it will be just what I
wanted it to be.
January 23rd, 2009, 04:20 PM
#19
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Thread Starter
Join Date: Sep 2008
Posts: 78
True, but here is the option Mark was suggesting. For $500 you can get a new after market SBC rod and forged pistons. It will probably cost more to get forged Olds pistons, press off the old pistons and recondition 35 year old rods. Rod bearings and possibly rings will probably end up being cheaper, too. There is the additional cost to bore to 4.125" (which gets you a few more cubes and unshrouds the valve a little better) and grind .025 off the crank, but in the end you have a nice little combo. So, it is just another option, that's all, nothing radical.
January 23rd, 2009, 06:18 PM
#20
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Location: Central Fl
Posts: 7,971
350 build
Capt Jim hit the nail on the head, overall cost and quality of parts was what I was proposing. Maybe you can't get the rods and forged pistons for $500.00, but it wouldn't be much more than that. And when you factor in the cost of the rod recon, rod bolts etc that you won't have to pay for, in the end it becomes quite attractive.
I just did the same combo for a buddy, Turned out phenominal, really runs awesome. Something to think about.
I just did the same combo for a buddy, Turned out phenominal, really runs awesome. Something to think about.
January 23rd, 2009, 07:19 PM
#21
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Join Date: Nov 2007
Location: Rathdrum, Idano
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I don't know that much about the 350's but before I built my 455 I did a cost comparrision on parts and ended up using cat rods, keith black pistons & edelbrock heads bought off of e-bay and it ended up costing only a few hundred dollars more the having C heads redone and rods redone and I am very happy with the results. In fact so much so that I am repeating the process on the 455 I am now building for my 48 Olds
January 23rd, 2009, 07:34 PM
#22
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Join Date: Aug 2007
Posts: 2,250
2-ICR6200 6.200" Scat rod, bushed, 2.100" big end $279/set of 8
H-615CP Forged Speed Pro pistons, 4.125" P/H $29 each x 8 = $232
Total is $511, I lied
Deck height is 9.330" Subtract half of stock stroke is 1.692 = 7.638"
7.638" - 6.2" rod = 1.438"
1.438" - P/H of 1.425" = .013 in the hole. A .010 decking gives you darn near zero deck. Or, use a .028 gasket to get .041 piston to head.
February 27th, 2009, 09:54 PM
#23
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February 28th, 2009, 03:46 AM
#24
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Location: Southern CA
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