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408 Build Thread (New numbers)

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Old 04-25-2013, 01:15 PM
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Originally Posted by MANNY Z
I'm going with a 408 as well but I'm going with a -20 dish wiseco piston, k1 rods w/ARP 2000 rods bolts and a k1 crankshaft. I intend to run a GT91 turbo but have no clue of what cam and heads to use. I have some 243 heads and an ls2 intake but am not sure if they would be good for the 408. Any suggestions? I'm gonna run a 4l80 and a PTC 3500 converter. I also have an l92 vic Jr EFI intake and a carb intake.

This will be going into a 92 Mustang coupe with a 12 point cage that's been mini tubbed...

I should be a nice project....

Manny
If you have the hood clearance look at the proflo xt....I'm running one on my 408 and love it, plus it is aluminum, so you can abuse it under boost and not have to worry about blowing it apart.
Old 05-07-2013, 08:56 PM
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Well im still waiting for my machine shop to finish up all the work im having him do, but i did assemble the 92mm TB, LS3 intake, and LS1 fuel rails and 60lb injectors.
Old 05-17-2013, 02:01 PM
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Alright got my block and rotating assembly back, soon ill start putting her back together!
Old 05-17-2013, 10:45 PM
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Originally Posted by hybridfox
If you dont mind saying, how much did all the machine work cost you? Because i am trying to plan out a 408 build myself and cost comparing between buying a junkyard lq motor or just go ahead and get a short block from TSP or Livernois. Machine shop costs could be the deciding factor and like you i will probably run l92 heads and stay NA. Interested to see your numbers.
Working on the same thing here. As for machine shop cost, I was quoted about $ 1100.00. That includes the following items.
Boring The Block
Decking The Block
Balancing The Rotating Assembly
Line Bore the Main Journals
Instal Cam Bearins
Complete Engine Assembly
Degree The Cam

From my research it is about a wash between the two. Plus I was able to buy my parts as I was able too. It seemed everytime I started saving hoping to by the new wngine something else would come up. This way i was able to buy my parts as the funds were available.
Old 05-19-2013, 04:53 PM
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And so it begins
Old 05-22-2013, 06:48 PM
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Got all of my pistons in today! now im waiting on the cam, and the rest of the parts from texas speed. I also need to make a run to the hardware store to get some washers for the windage tray since it doesn't clear the rod caps.


Old 05-23-2013, 12:40 AM
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Looking good, you're at about the same point in your build as i am. Just out of curiosity how did you decide what lb injector to run?
Old 05-23-2013, 03:24 PM
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Originally Posted by maverick18
Looking good, you're at about the same point in your build as i am. Just out of curiosity how did you decide what lb injector to run?
Well when i bought the car with the blown motor it came with the Siemens 60lb injectors, so i decided to keep them. But you can use a calculator like this: https://sphotos-b.xx.fbcdn.net/hphot...34764737_n.jpg to determine what size injectors you would need to meet your power goals.
Old 05-24-2013, 05:36 PM
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Just finished putting on the windage tray, i used a 8mm nut as a spacer, then put the regular nut on that. It gave me about a 1/4" of clearance from the rod caps.

Rockers and gaskets came in from texas speed, and my cam should arrive on 5/29. Moving right along.
Old 05-26-2013, 05:17 PM
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So i have FLP 1.6" stepped headers that came with the car and a 2.5" TD exhaust. I was gonna reuse it and change it out later. But now im thinking i should just shell out the extra $1,000 now and get TSP 1 7/8" headers and the Rumbler X pipe. What do you guys think?
Old 05-29-2013, 03:55 PM
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I went ahead and ordered TSP 1 7/8" headers and ebay stainless TD's with sweet thunder mufflers. Also my cam came in today

Hoping to get that installed tomorrow, and the machinist said hed have the heads done and ready for monday. Im shootin for June 7th as the first start up
Old 06-02-2013, 05:52 PM
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Cam in and all timed up
Old 06-02-2013, 06:59 PM
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looks good, just like my 408 build
Old 06-03-2013, 08:23 PM
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I put my engine back in the cradle for the rest of the assembly. I then put the clutch on, and the trans soon followed. Heres a picture of the Monster Stage 2 clutch:

Also i recieved all my exhaust system except for the mufflers. It is TSP 1 7/8" headers:
And ebay stainless steel 3" true duals:

Shooting to get this bad boy running by friday, and have it dyno tuned saturday. If all goes well ill have the numbers posted sunday.
Old 06-03-2013, 11:33 PM
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Awesome man, really coming together. Im running the same clutch and headers as you. It will be interesting to see how our builds compair on the dyno. We are both running a custom cam pretty close in lift and duration, I stuck with the cathedral port and you went rectangular. Good luck this weekend.
Old 06-04-2013, 08:39 PM
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Well, I think i just hit a major roadblock. My machinist gave me a head to measure pushrods with, and i was turning the crank over to get the cam on the base circle. And at this one spot it got incredibly hard to turn, and it felt like something was hitting and scraping. Did some research and im pretty sure its the #1 rod bolt hitting the oil pan. My engine is currently in the cradle with the trans attached. So now i have to figure out how to get that pan off. Then clearance it, and ill probably have to weld a plate on the other side, idk it feels like it hits pretty hard.
Old 06-05-2013, 02:00 AM
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Originally Posted by KingPin1094
Well, I think i just hit a major roadblock. My machinist gave me a head to measure pushrods with, and i was turning the crank over to get the cam on the base circle. And at this one spot it got incredibly hard to turn, and it felt like something was hitting and scraping. Did some research and im pretty sure its the #1 rod bolt hitting the oil pan. My engine is currently in the cradle with the trans attached. So now i have to figure out how to get that pan off. Then clearance it, and ill probably have to weld a plate on the other side, idk it feels like it hits pretty hard.
Hey man. Been following your build and a few others... Contemplating my own 408 build for my 1500HD. Just read your little issue with the windage tray... Did you know that SLP makes a cool spacer kit for this? SLP Part #12510. I have also seen others just use some hex nuts from Home Depot. This is why its always a good idea to mock it up first!.. Anyway, great build you got going there bud!
Old 06-05-2013, 03:44 PM
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Originally Posted by westduncan
Hey man. Been following your build and a few others... Contemplating my own 408 build for my 1500HD. Just read your little issue with the windage tray... Did you know that SLP makes a cool spacer kit for this? SLP Part #12510. I have also seen others just use some hex nuts from Home Depot. This is why its always a good idea to mock it up first!.. Anyway, great build you got going there bud!
I dont have a problem with the windage tray, I have a problem with the oil pan. And i never heard of that problem until now.
Old 06-05-2013, 04:43 PM
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Also just measured for pushrods. I got that 7.29 pushrods will give me about .045" of preload on the lunati link bar lifters without the head gasket. The head gasket is .06" compressed so i got 7.35" 3/8" pushrods from summit. Should be here in a couple days.
Old 06-05-2013, 05:13 PM
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Well crap... figured it would hit the oil deflection tray long before the pan... Just one more thing to think about before I do my build... Ill step back into the shadows.. mouth shut and eyes wide open. If you get a chance would you mind posting a pic where it is hitting?


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