408 Stroker build - Vintage Mustang Forums

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post #1 of 15 (permalink) Old 05-04-2017, 10:04 PM Thread Starter
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408 Stroker build

Greetings all,
I have just purchased a 408 stroker kit for my 351W block. The kit is a Scat 9000 based crank. The block is currently at the engine shop getting cleaned, and once the cam kit and stroker kit arrive, the machining can begin. I will try to post pictures as I build. I currently do not have a car to put this in, but when I do find one that I like, I can update and post the install.
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post #2 of 15 (permalink) Old 05-05-2017, 08:23 PM
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I like your style....build the power, then find a proper recipient to install it in...
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post #3 of 15 (permalink) Old 05-07-2017, 07:23 AM Thread Starter
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Thank you!

The parts arrived yesterday, now I need to get them to the machine shop sometime this week so the block can be honed and cleared.
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post #4 of 15 (permalink) Old 05-09-2017, 06:18 PM
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Im just starting a 408 build myself.

I'd love your input.

Why a Scat crank?
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post #5 of 15 (permalink) Old 05-11-2017, 08:52 AM
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Scat is the best bang for the buck. I took my 408 with a Scat 9000 cast crank to a 6.12@112, which would be a 9.6x-9.7x in the 1/4. That motor saw repeated abuse over 7000 RPMs, and lots of nitrous. That cheap little crank will take a lot more abuse than what most people will throw at it.
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post #6 of 15 (permalink) Old 05-12-2017, 10:23 AM Thread Starter
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I picked the Scat crank because it can be internally balanced, but also I have heard a lot of good reviews.
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post #7 of 15 (permalink) Old 05-12-2017, 10:49 AM
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I picked the Scat crank because it can be internally balanced, but also I have heard a lot of good reviews.
Internal balance is way over rated. External is fine too.

'66 GT350H-3 time cover car - Car Craft July'77,Modified Mustangs and Fords Feb2011 ( w/article), Mustang Monthly June 2014. Bracket raced by me for the last 43 years. Yes it is a real one.
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post #8 of 15 (permalink) Old 05-12-2017, 11:37 AM
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a plug for a '65-'66 Mustang or similar small bodied car- my 408W '65 fb is an absolute joy to drive. Tons of power- enough to absolutely flog the dogsh*t out the car and really have fun!!

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post #9 of 15 (permalink) Old 05-15-2017, 07:33 PM Thread Starter
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Okay, just dropped off the bottom end at the engine shop. They are going to build the short block and degree the camshaft. I was running some numbers earlier today to find the dynamic CR for a few different heads. With the cam that I am using my dynamic CR would be 8.08:1 with a 64cc head and 8.96:1 with a 58cc head. Static CR is 10:1 at 64cc, and 11.1:1 at 58cc. The camshaft I am using is a Comp 270HR Retro-fit Magnum. The pistons are dished 20cc. I am a bit torn between the AFR 185s and the Ford GT40X heads. I know that the AFRs will flow better for just a bit more cost. I am targeting 450hp.
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post #10 of 15 (permalink) Old 05-15-2017, 07:53 PM
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Quote:
Originally Posted by TundraWolf View Post
Okay, just dropped off the bottom end at the engine shop. They are going to build the short block and degree the camshaft. I was running some numbers earlier today to find the dynamic CR for a few different heads. With the cam that I am using my dynamic CR would be 8.08:1 with a 64cc head and 8.96:1 with a 58cc head. Static CR is 10:1 at 64cc, and 11.1:1 at 58cc. The camshaft I am using is a Comp 270HR Retro-fit Magnum. The pistons are dished 20cc. I am a bit torn between the AFR 185s and the Ford GT40X heads. I know that the AFRs will flow better for just a bit more cost. I am targeting 450hp.
I think AFR185s flow around 290ish CFM @.500 lift where the GT40X are in the 240s...for just a bit more I would buy the AFR185s..no point leaving HP on the table at this stage.

Last edited by SVTguy; 05-15-2017 at 07:56 PM.
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post #11 of 15 (permalink) Old 05-15-2017, 08:48 PM Thread Starter
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I think AFR185s flow around 290ish CFM @.500 lift where the GT40X are in the 240s...for just a bit more I would buy the AFR185s..no point leaving HP on the table at this stage.

I did run the simulation on Camquest at 11:1 static CR for both heads. It showed an additional 90-100HP with the AFR 185s over the GT40Xs.
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post #12 of 15 (permalink) Old 05-17-2017, 12:35 AM Thread Starter
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Okay, just ordered the heads. I went with the AFR 185s with a 60cc combustion chamber. This should get me a static CR of 10.24 with a dynamic CR of 8.27, which from what I have read, should be pretty safe and have good performance. I was able to price match them on Summit, saving me about $70 on the set.
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post #13 of 15 (permalink) Old 05-17-2017, 01:41 AM
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in the 70's a guy i knew bought a used 850 holley dp and built an small block chebby under it. after that he got a camaro without an engine

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post #14 of 15 (permalink) Old 05-17-2017, 01:23 PM
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Okay, just ordered the heads. I went with the AFR 185s with a 60cc combustion chamber. This should get me a static CR of 10.24 with a dynamic CR of 8.27, which from what I have read, should be pretty safe and have good performance. I was able to price match them on Summit, saving me about $70 on the set.
I don't think the AFR's come with a 60cc combustion chamber, 58cc or 72cc so your CR will be a touch higher.
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post #15 of 15 (permalink) Old 05-21-2017, 04:16 PM Thread Starter
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The Heads have arrived!
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