Dump valves

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Dec 27, 2019 | 01:06 PM

LiquidCowboy

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Mountain Pass

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From: OH

Dump valves

Ok so I'm building a blower setup, and been doing some reading and keep coming across dump valves for the tranny. Think I'll need it? 400/408 11:1 before boost 6-71 & C6

Dec 27, 2019 | 06:47 PM

85e150

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A 6-71 on top of 11:1 compression.

You need to go back to blower motor school.

Dec 27, 2019 | 08:40 PM

LiquidCowboy

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Mountain Pass

Joined: Feb 2017

Posts: 242

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From: OH

Ever see a blown 400 Ford or one that n/a turns 7200 without coming apart?

I'm asking questions because I need to know.

Also my DCR pre boost (wasn't asked of me) is in the low 9s

Back to transmission though, will it be necessary to need a dump valve or just launch without it?

Jan 3, 2020 | 06:33 AM

Briansshop

Fleet Mechanic

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From: MD

What trans? Target ET?

Jan 3, 2020 | 11:44 AM

LiquidCowboy

Thread Starter

Mountain Pass

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From: OH

C6 and weighing 4330 I'd like 10s

Jan 3, 2020 | 01:08 PM

Briansshop

Fleet Mechanic

Joined: Aug 2005

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From: MD

E4OD here,so basically a C6, no brake, low 10s otw to 9s soon.

Your first post says 11:1 "before boost",btw.

Jan 3, 2020 | 01:17 PM

LiquidCowboy

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Mountain Pass

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From: OH

Yep, 11:1 before boost (static) 1.71ch flat tops, 4.030 bore 4.055 gasket, 4 stroke, 72cc heads, 6.58 Molnar h beams 10.290 deck height. Setting up rev limiter on 7200.

DCR comes down to a fairly decent number I can run on pump gas but will end up going e85 or Methanol when I put the big pulleys on it.