What 20b "#" do you have? - RX7Club.com - Mazda RX7 Forum

What 20b "#" do you have?

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Old 08-22-02, 09:42 PM
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Question What 20b "#" do you have?

Just curious what number does you engine have on it?
you will find the number stamped on the front rotor housing.
lets gather some info here on run numbers etc.
it will be either a number or a letter followed by a number.
my number is 454

matt
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Old 08-22-02, 11:40 PM
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mine says 2 0 b



(I wish...)
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Old 08-23-02, 01:18 AM
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Mine says 421. The highest number I saw was I think the Mazdatrix drag car where it was in the 9XX range.

Also if these numbers are actually the serial number for the engine, then how many 20B's where actually produced? Anybody has that info?

Last edited by rx720bt; 08-23-02 at 01:21 AM.
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Old 08-23-02, 03:52 AM
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Which numbers were used from series one to series two? Weren't the series 2 engines slightly stronger?
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Old 08-23-02, 08:34 PM
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come on guys how hard is it to look see what number is on your motor.. there is a point to my question which I will get to later..

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Old 08-23-02, 10:39 PM
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A 021 - one of the very first i believe!
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Old 08-23-02, 11:05 PM
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come on there are more 20b owners here that could post numbers!!
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Old 08-24-02, 11:49 PM
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you wanna make me go and look at the thing?? i think it was 246

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Old 08-24-02, 11:55 PM
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I'll look at kurgans engine later. but i am at home now..


-Zach
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Old 08-25-02, 05:30 AM
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Let us know what the letter is before the number also - thanx - Paul
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Old 08-26-02, 08:00 AM
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Mine was 5xx. I got to look tomorrow.
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Old 08-27-02, 09:24 PM
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555 - I swear it was made for a Subaru


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Old 08-28-02, 10:19 AM
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only 5 of us had the energy to check to see what number engine we have?
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Old 08-28-02, 11:59 AM
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Originally posted by now
only 5 of us had the energy to check to see what number engine we have?
matt
no, i didnt even go look at mine

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Old 08-28-02, 07:35 PM
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Would be nice to hear from:
Attila the Fun
to see what number is on his motor...

matt
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Old 08-28-02, 10:32 PM
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Actually scratch that - the number "555" was painted all over the motor, but the front plate actually had "669" stamped on it.


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Old 08-29-02, 12:58 AM
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the series number is on the front rotor housing
not on the cast iron parts, now if you have rebuilt and
used 3rd gen housings you will no longer have the number.

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Old 08-29-02, 03:16 AM
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Mine has 757 on the front and rear rotor housing, couldn't see the second housing but I think thats the housing we replaced anyway.
is the number supposed to be on all housings or just the front one??
I believe 9000 20B JC Cosmo's were made, how many extra engines were built is another story.
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Old 08-29-02, 12:21 PM
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they still sell the engines too. NF01-02-200 list $7500.00

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Old 08-29-02, 03:01 PM
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How does that price compare with other engines capable of similar power? I think the Supra inline 6 can do like 1000HP or something. How much do they cost new?
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Old 08-30-02, 09:15 PM
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guess i was wrong, the numbers are stamped on all the
rotor housings, not just the front one.

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Old 08-31-02, 01:28 AM
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I saw a 20B with the numbers stamped on all three too. It was 7xx (only glanced at it).
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Old 10-08-02, 01:16 AM
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I now have a B991 as well
Will be working on the rebuild over the next while and
should end up with a good reliable block.
i am happy now

later
matt
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Old 10-08-02, 01:47 AM
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Originally posted by now
Would be nice to hear from:
Attila the Fun
to see what number is on his motor...

matt
Attila didn't see this thread until1:42 A.M. and is not anywhere near the RXX-7 and won't be until tomorrow evening.

You're so impatient.
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Old 10-09-02, 03:52 PM
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Originally posted by now
Would be nice to hear from:
Attila the Fun
to see what number is on his motor...

matt
392
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