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408 is finally together (pic heavy)

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Old 12-23-2014, 06:44 AM
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This thread is better than McDonald's!! I'm lovin it!!
Old 12-23-2014, 04:56 PM
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Originally Posted by Tuskyz28
This thread is better than McDonald's!! I'm lovin it!!
Lol. The only major issue in the build was the McLeod RXT clutch. No matter what the measurements were it would not fully disengage/allow to go into gear while running. After 4 attempts and multiple hydraulic reaplcements a used Centerforce dual friction was installed and worked the first time

So now I'll need to send the new clutch back to McLeod to get it looked at.
Old 12-23-2014, 08:07 PM
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Nice build.Keep us updated when you put that beast on the rollers.
Old 12-23-2014, 08:37 PM
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SUB'd. What numbers are you shorting for Op
Old 12-24-2014, 12:40 AM
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I'd just install a monster clutch!!
Old 12-24-2014, 07:06 PM
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Originally Posted by JR 427
SUB'd. What numbers are you shorting for Op
I believe 550ish to the wheels is possible. Considering its a cathedral port head/FAST intake combo I cant see it peaking much past 6400rpm. Where it may lack up top it should make up for mid range and down low.
Old 12-29-2014, 02:43 PM
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Where is the build at now? Keep me updated bro.
Old 12-30-2014, 08:24 AM
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Sick *** 408....
Old 12-30-2014, 10:36 AM
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I remember the first time i drove my 408 awesome feeling
Old 05-06-2015, 10:32 AM
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Dyno done 565rwhp/520rwtq

Go here for results --> https://ls1tech.com/forums/dynamomet...l#post18791058

Last edited by cdubbzz; 05-17-2015 at 11:18 AM.
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Old 10-30-2019, 12:18 PM
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Bump because she was a great combo
Old 10-30-2019, 12:38 PM
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Yes she was!!
Old 10-30-2019, 04:15 PM
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Those TFS 237s that Frankenstein did were really great heads. I've seen a number of 700HP motors with them without having to go insane on the cam.
Old 10-30-2019, 07:15 PM
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Originally Posted by JakeFusion
Those TFS 237s that Frankenstein did were really great heads. I've seen a number of 700HP motors with them without having to go insane on the cam.
No doubt those heads make great power. They're now on my friend Joe's Dragweek Nova....runs mid 8's with a single turbo all day (Joe on right)


I may still have the cam that was mated to them...was like 241/244 duration
and in the mid 600's for lift...109 LSA I believe.
Old 10-30-2019, 08:24 PM
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Nice to see a fast 4th gen nj guy on here! Was a nice build and is a nice car man!
Old 10-31-2019, 10:12 AM
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Yeah a 241/244 isn't a big cam at all for a 408.

I'm sort of hoping my 247/259 in a 440 is able to make power with a good, efficient head while remaining pretty streetable.



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