I'm looking for information on factory 400 G pistons.

I thought I located standard bore 400 G piston for a 68/69 442.
But it turned out that the piston had a large dish.
I was under the impression that all 400 G blocks used the same piston.
The part number on the large dish piston was 399909 it also had GM cast into the piston.

If some one could post pictures of a factory 400 G piston that would be great.
Also if you could post the part number that would also help a lot.

Thanks
Bernhard

 

398454....

 

Awesome
Thanks Sammy

Is that a standard bore piston?
Would you be interested in selling the piston or pistons?

 

All '69 400s used the same piston (except for the "letter" code differences for fitment). '68 was a different story. While most used the same high-compression pistons as '69, '68 also had the low-compression 2-bbl 400 in the "Turnpike Cruise" option. I had one of those in one of my 442 ragtops back in the day...

 

So I must have been sent 1968 turn pike cruiser 400 pistons

#399909 17.11cc

Sammy's piston looks much better

#398454 68 and 69 ??????
According to the NHRA all Hi comp pistons have a 1.70 cc dish 68/69

Also do you know how the letter code works???


I also found In the supper tuning book were they list factory numbers
#400618 W30 or W32 ?????????


Due you know were there might be a list of part numbers listed for the 68/69 G 400 pistons?


Thanks for the reply's
Bernhard

 

Supercars Unlimited lists a 10.5:1 standard bore piston for the 400G (as well as .030 and .060)


Item #: 14-018

 

I need a original factory GM piston to have a copy made. C P will manufacture the piston, then they will be shipped to the NHRA for approval.
The NHRA will then keep the original piston and the cp piston for there recorders.

 

I need a original factory GM piston to have a copy made. C P will manufacture the piston, then they will be shipped to the NHRA for approval.
The NHRA will then keep the original piston and the cp piston for there recorders.
__________________
Defender of the 400 G
=========================
Well hell why didn't you say so
I might have one such piston if I can find it. I used to try to keep one of everything. You don't need a great conditon piston, just an example.

 

Thanks for the offer, sammy has some he will be sending me.

 

Pistons sent Bernhard........ummmmmm finally. Thanks for your patience


Ted

 

No Thank You
Very much appreciated