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Print in friendly format Send this term to a friend  4L80E
Automatic Transmission - 4 Speed

1st Gear: 2.43
2nd Gear: 1.49
3rd Gear: 1.00
4th Gear: 0.75

Reverse: 2.07

- Used in production GM models...
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Re: Building a boost friendly 400

Subject: Re: Building a boost friendly 400
by rklessdriver on 2013/11/18 14:10:43

Quote:

383tpimachine wrote:
Pete,
After looking through SRP and a few other vendors I find very few 2618 choices. CP offers a nice piece as does Racetec. Icon (never heard of them) also makes one within spec for my setup.


Race Tec is owned by Wayne Brooks the former owner of JE Pistons.

ICON Pistons is the re-named Forged line from Keith Black.

There are lots of pistons out there that will work fine - you just need to have TEA or whoever does the heads make a small adjustment on the cumbustion chamber when they do the heads....

Probe's SRS pistons are 2618 alloy...

http://www.cnc-motorsports.com/piston ... 377-400-434/dish-top.html

Diamond has a shelf piston that will also work...

http://www.cnc-motorsports.com/piston ... sh-pistons4-125-bore.html

JE has a shelf piston that will work.

http://www.cnc-motorsports.com/piston ... e-pistons-4-125-bore.html

The Wiseco Pro Tru line has 3 dished piston options for the 400.

http://www.summitracing.com/search/de ... fault&SortOrder=Ascending

As far as the strength of the Compstar line of rods and cranks for what your doing - I wouldn't worry about it...

On a forced induction engine the tune up is more important than the "quality" of the parts inside. Most of the 4340 forged imported cranks and rods are plenty strong.
Will
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