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Old 12-01-2009, 09:06 PM   #1 (permalink)
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408 stroker build help

I am looking at getting this set up and was wondering what heads would be best to get 450-500hp and what intake and carb it is bored 30 over. Any hekp would be greatly appreciated thanks

408 Stroker Bottom End Assembled Pistons 9.5 to 1, Flat Top, Rods, H-Beam, Cast Crank. it has an edlebrock rpm intake and stock 351w heads.

Does anyone know with this setup what HP I should be looking at
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Old 12-02-2009, 08:25 PM   #2 (permalink)
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Re: 408 stroker build help

use the edelbrock victor junior head, exhaust ports are raised slightly, and valves are way bigger which you will need to support 408 cu in. An 850 double pumper should work well on this and the intake should be ok depending on camshaft. Kind of hard to determine horses with out cam specs.
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Old 12-02-2009, 10:04 PM   #3 (permalink)
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Re: 408 stroker build help

What is the intended use?

David
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Old 12-02-2009, 10:26 PM   #4 (permalink)
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Re: 408 stroker build help

It is going to be street and occasional stip. Would the gt40 heads work good for this? I dont have any cam specs I was told it was already assembled how would I know what to look for to make sure it was done correctly or how much would it cost to have it all assembled? I am new too all this and just want to make sure it is done right I can do it if I know what to look for and if I need any special tools. Thanks everyone
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Old 12-03-2009, 12:30 AM   #5 (permalink)
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Re: 408 stroker build help

I would be very careful with this one. There are many bogus 'strokers' out there, and you could be told anything and have little way to prove it. For example, flat-tops would make around 12:1 compression with 'standard' size head chambers, so it can't be 9.5:1 - or some info is wrong. I would ask for a full list of components used (manufacturer, type, parts numbers, etc.) so we can get a picture of what you really have there.

No, the GT40's do not have nearly the flow capability for a 408. Aftermarket heads with 190-225cc intake runners and large chambers would be a guideline. But, let's see what you have first before we get too far ahead of ourselves. Get the specifics and post 'em up.

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Old 12-03-2009, 07:52 AM   #6 (permalink)
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Re: 408 stroker build help

There is no cam in it they were just starting to build this engine so no cam or cam bearings it has a new cast crank and they are KB pistons flat top with file to fit rings all the engine work has been done to the block to set it up for the 408 they just need the money now I am looking at this for 800 is this a good deal? Also what cam would be best and head (specific model or part number) and carb and intake? I would like to do this right the first time also I have a built c4 in it now can I keep that and what gearing should I use for the rearend like I said it will be mostly street but I want to get to the strip also but more for street. Thanks David for the help and everyone else that has or will reply
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Old 12-03-2009, 12:32 PM   #7 (permalink)
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Re: 408 stroker build help

Quote:
Originally Posted by trikmit View Post
There is no cam in it they were just starting to build this engine so no cam or cam bearings it has a new cast crank and they are KB pistons flat top with file to fit rings all the engine work has been done to the block to set it up for the 408 they just need the money now I am looking at this for 800 is this a good deal? Also what cam would be best and head (specific model or part number) and carb and intake? I would like to do this right the first time also I have a built c4 in it now can I keep that and what gearing should I use for the rearend like I said it will be mostly street but I want to get to the strip also but more for street. Thanks David for the help and everyone else that has or will reply
The best set of heads is going to depend on exactly what pistons and rod length you have. Then the best cam is going to depend on what heads you end up going with, and you will need to check the block to see if it is a factory roller block or an early block. Since they were just starting the build they should be able to provide you the manufacturer and part numbers for everything they put in it. If the pistons are flat tops with little to no valve reliefs, you are going to need large chamber heads (at least 70cc) just to get the compression down to about 11:1. Then you will need a cam with the right amount of overlap to be able to run it on pump gas. (408's built for the street typically have dishtop pistons and smaller chamber heads)

On the surface it sounds like it may be a good deal, but it just depends on exactly what parts are in it, the quality of the machine work, the quality of the assembly, and just how much you really know about and trust this seller. I would be looking for copies of some receipts and maybe go talk to the machine shop that did the work on the block. Also, if you don't really know what you're looking at you may consider taking it to your own machine shop or engine builder and have them look it over before laying down the $800.

As David indicated before, we really need a parts list and specs (or part numbers) to really be able to help you. Once you give us that, we can tell you if it is a good deal or not and get you going in the right direction on the heads, cam, and everything else. Otherwise, we are just guessing.
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Last edited by kgordonl; 12-03-2009 at 12:58 PM.
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Old 12-03-2009, 01:19 PM   #8 (permalink)
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Re: 408 stroker build help

I was told it is an 80s block what else should I be asking for or looking for? They dont have the part number of the pistons when I go look at it what do I need to look at? I asked about the shop and he is going to find out it ws taking by his friend and he is not sure what shop it has been about a year and been sitting in his house. Thanks again for all the help and sorry if I am asking the same things over and over I am just tring to understand all this and getting started.
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Old 12-03-2009, 04:38 PM   #9 (permalink)
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Re: 408 stroker build help

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Originally Posted by trikmit View Post
I was told it is an 80s block what else should I be asking for or looking for? They dont have the part number of the pistons when I go look at it what do I need to look at? I asked about the shop and he is going to find out it ws taking by his friend and he is not sure what shop it has been about a year and been sitting in his house. Thanks again for all the help and sorry if I am asking the same things over and over I am just tring to understand all this and getting started.
Personally, before I gave him $800, I would expect a parts list with the brand and part number of everything he put in that engine especially the crank, rods, and pistons. Even if it was assembled a year ago, it is still reasonable to expect him to know what's in it and have receipts. If not, something is "fishy" here. Then he can't tell you what machine shop did the work because his friend took it for him??? See any red flags here??? That engine could be anything... how do you know its not just a flat top 351W or even a 302???

You should start by looking up the serial number on the block. Then, depending on where they are stamped, you may be able to rotate the assembly and see the part numbers on the pistons, crank, and maybe even the rods. Otherwise, I would insist that the seller disassemble it enough to get those part numbers.

Unless you are able to verify the part numbers on the components themselves and/or the seller produces a parts list with receipts, you would be gambling with your money and we still wouldn't know what you have.

Just my 2 cents.
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Last edited by kgordonl; 12-03-2009 at 08:36 PM.
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Old 12-05-2009, 11:17 AM   #10 (permalink)
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Re: 408 stroker build help

ok guys I have the info for the stroker kit it was purchased at powerhouse and here is what they list. Also the engine work was done b etween 2-3 years ago and this was given to him by his buddy who owed him money and it has been sitting in is house since he was going to build it for a truck unit for mud racing and now that times are hard he needs to sell so any help you can give for this to be built correctly would be appreciated. the are 30 over pistons

[SIZE=1] Your Choice Hypereutectic Piston:
1. Flat Top (2 Valve Reliefs 11.6:1 w/64cc)
New 5140 Forged I-Beam Rods (Polished Beams/ARP Bolts)
Street/Strip Ring Set
Rod Bearings
Main Bearings
Cast Stroker Crank[/SIZE]

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Old 12-05-2009, 11:22 AM   #11 (permalink)
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Re: 408 stroker build help

Got the crank info it is cast and 4" stroke 6.200 rods and 1pc seal.

[SIZE=1]QT351B[/SIZE][SIZE=1][/SIZE][SIZE=1]408ci/4.000" Stroke/6.200" Rod/1-Pc. Seal/CAST [/SIZE][SIZE=1]$195.00 Each[/SIZE][SIZE=1]55 LB[/SIZE][SIZE=1][/SIZE] [SIZE=1][/SIZE][SIZE=1][/SIZE][SIZE=1][/SIZE] Product Description
[SIZE=1]POWERHOUSE nodular iron crankshafts are manufactured with modern vacuum casting process. The 80-60-06 nodular iron is the best material for crankshaft that exceeds OEM specification. The nodular iron microstructure consists of pearlite iron 80-90%, and graphite over grade 2 and grade 3 in iron. Every casting batch is analyzed with pearlite and graphite. The state-of-the-art CNC machine centers provide superior tolerance.

Our nodular iron crankshafts incorporate these features:
- CNC machined to provide superior tolerance.
- All journals are micro polished to 5 RMS.
- OEM original journal radii for using of standard bearings.
- Larger chamfer at oil holes for better lubricating.
- Every crankshaft has been magnafluxed and ultrasonic tested.
- Every crankshaft has been surface oxidized blackened for rust resistance and hardness.

[/SIZE]
[SIZE=1]QT351B[/SIZE][SIZE=1][/SIZE][SIZE=1]408ci/4.000" Stroke/6.200" Rod/1-Pc. Seal/CAST [/SIZE][SIZE=1]$195.00 Each[/SIZE][SIZE=1]55 LB[/SIZE][SIZE=1][/SIZE] [SIZE=1][/SIZE][SIZE=1][/SIZE][SIZE=1][/SIZE] Product Description
[SIZE=1]POWERHOUSE nodular iron crankshafts are manufactured with modern vacuum casting process. The 80-60-06 nodular iron is the best material for crankshaft that exceeds OEM specification. The nodular iron microstructure consists of pearlite iron 80-90%, and graphite over grade 2 and grade 3 in iron. Every casting batch is analyzed with pearlite and graphite. The state-of-the-art CNC machine centers provide superior tolerance.

Our nodular iron crankshafts incorporate these features:
- CNC machined to provide superior tolerance.
- All journals are micro polished to 5 RMS.
- OEM original journal radii for using of standard bearings.
- Larger chamfer at oil holes for better lubricating.
- Every crankshaft has been magnafluxed and ultrasonic tested.
- Every crankshaft has been surface oxidized blackened for rust resistance and hardness.

[/SIZE]
[SIZE=1]QT351B[/SIZE][SIZE=1][/SIZE][SIZE=1]408ci/4.000" Stroke/6.200" Rod/1-Pc. Seal/CAST [/SIZE][SIZE=1]$195.00 Each[/SIZE][SIZE=1]55 LB[/SIZE][SIZE=1][/SIZE] [SIZE=1][/SIZE][SIZE=1][/SIZE][SIZE=1][/SIZE] Product Description
[SIZE=1]POWERHOUSE nodular iron crankshafts are manufactured with modern vacuum casting process. The 80-60-06 nodular iron is the best material for crankshaft that exceeds OEM specification. The nodular iron microstructure consists of pearlite iron 80-90%, and graphite over grade 2 and grade 3 in iron. Every casting batch is analyzed with pearlite and graphite. The state-of-the-art CNC machine centers provide superior tolerance.

Our nodular iron crankshafts incorporate these features:
- CNC machined to provide superior tolerance.
- All journals are micro polished to 5 RMS.
- OEM original journal radii for using of standard bearings.
- Larger chamfer at oil holes for better lubricating.
- Every crankshaft has been magnafluxed and ultrasonic tested.
- Every crankshaft has been surface oxidized blackened for rust resistance and hardness.

[/SIZE]
[SIZE=1]QT351B[/SIZE][SIZE=1][/SIZE][SIZE=1]408ci/4.000" Stroke/6.200" Rod/1-Pc. Seal/CAST [/SIZE]
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Old 12-05-2009, 01:40 PM   #12 (permalink)
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Re: 408 stroker build help

Quote:
Originally Posted by trikmit View Post
ok guys I have the info for the stroker kit it was purchased at powerhouse and here is what they list. Also the engine work was done b etween 2-3 years ago and this was given to him by his buddy who owed him money and it has been sitting in is house since he was going to build it for a truck unit for mud racing and now that times are hard he needs to sell so any help you can give for this to be built correctly would be appreciated. the are 30 over pistons

[SIZE=1]• Your Choice Hypereutectic Piston:[/SIZE]
[SIZE=1]1. Flat Top (2 Valve Reliefs 11.6:1 w/64cc)[/SIZE]
[SIZE=1]• New 5140 Forged I-Beam Rods (Polished Beams/ARP Bolts)[/SIZE]
[SIZE=1]• Street/Strip Ring Set[/SIZE]
[SIZE=1]• Rod Bearings[/SIZE]
[SIZE=1]• Main Bearings[/SIZE]
[SIZE=1]• Cast Stroker Crank[/SIZE]
So the bottom end is not assembled? I was under the impression that it is. Here is a link to the kit.
https://shop.enginekits.com/osb/itemdetails.cfm?ID=2123

It looks like a pretty standard low-budget kit for $699.00. So basically you're reimbursing him for the kit and paying him $100 for an eighties block that was machined 2-3 years ago by an undisclosed shop.
Keep in mind that it still has to be balanced and assembled, and you still need an oil pump/pickup, cam, timing chain set, gaskets, etc. just to complete the short block. Does he have the flexplate, balancer, or oil pan? If not, you will need that as well.
If you really want to do it right the first time, I think you could spend a little more money than you will ultimately end up spending on getting this "cheap" kit together and get a much better build with much better parts. It's hard to beat the deal Woody has on a fully assembled 408 short block (scroll down):
Fordstrokers small block ford short blocks
... And I'm sure there are other good deals on quality shortblocks out there.

Keep in mind that you are easily going to have $2000 or more in this "cheap" short block by the time you're done with it assuming that the block is actually good and you don't end up having to do the machine work over again or anything like that. If that happens, you could easily end up with more than $2700 in it.
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Last edited by kgordonl; 12-06-2009 at 07:09 AM.
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