Dickmeyer Automotive Engineering Race Header B3/B6

[FestYboy]

the FMS units were both tri-y headers. i have the B6 unit as well and can't say that i like it all that much.

[25Horseplay]

the FMS units were both tri-y headers. i have the B6 unit as well and can't say that i like it all that much.

Haven't looked at it in awhile. It was free! Came off Dj's car techno.

[blkfordsedan]

Matt, I don't know how many dyno runs you did, or in what state of mods, but could you provide some details on the results of the testing concerning the tube header? I realize you may not have even wasted your time dyno'ing the stock manifold, but some idea of the potential gains through the rpm range with stock and ported head would be sweet and may even help with the sale.

[festyfreak39]

those are some lonnnnggggggggggggggggggggggggggggg tube headers.

[Festevil3]

$300 & it includes 2 bungs as shown.

Is that for the weld yourself kit or the complete welded header?

[mattdickmeyer]

Is that for the weld yourself kit or the complete welded header?

$300 for the complete header ready to install.

[mattdickmeyer]

Matt, I don't know how many dyno runs you did, or in what state of mods, but could you provide some details on the results of the testing concerning the tube header? I realize you may not have even wasted your time dyno'ing the stock manifold, but some idea of the potential gains through the rpm range with stock and ported head would be sweet and may even help with the sale.

To be honest, I tested that over 3 years ago & didn't keep the file. As I recall header was worth around 8 HP on a stock Festiva & around 14.5 HP with head work. I will be doing some testing on some parts that I am developing at the present & bought a stock '91 Festiva to test with. So I will be able to start from scratch with base line numbers all the way to highly modified.

[gergorian]

To be honest, I tested that over 3 years ago & didn't keep the file. As I recall header was worth around 8 HP on a stock Festiva & around 14.5 HP with head work. I will be doing some testing on some parts that I am developing at the present & bought a stock '91 Festiva to test with. So I will be able to start from scratch with base line numbers all the way to highly modified.

That is awesome to hear!

[Festevil3]

^X2 can't wait to see some data

[blkfordsedan]

To be honest, I tested that over 3 years ago & didn't keep the file. As I recall header was worth around 8 HP on a stock Festiva & around 14.5 HP with head work. I will be doing some testing on some parts that I am developing at the present & bought a stock '91 Festiva to test with. So I will be able to start from scratch with base line numbers all the way to highly modified.

Good enough. IMO, those are pretty substantial gains for a 60hp start. I'm really curious of the potential gains on a B6, since the stock B6 manifold is a little better design than the B3. I suspect it would be similar, all thing taken into account.

[Bert]

Gidday mattdickmeyer! This business of yours with seeking to improve B3s is quite intriguing. The roller rocker arm cylinder heads of Aspires are supposed to be better performing. Wikapedia: " Mazda B-series engines" says carbed B3s were rated at 58 hp, EFIs 63 and that later B3 models were good for 70+ hp. Is it possible that Aspire B3s are that much more powerful and have you ever looked inside one? The manifolds and injectors are larger and the exhaust manifold is tube steel instead of a casting.
My very limited understanding of headers is that 'tuned' versions have functionally-equal length pipes going into a collector and that taking into account bends and/or curves in order to do that is a real art.
I'm following these posts with great interest.

[FestYboy]

Bert, all North American EFI B3s are 63 hp, and the Aspire exhaust manifold is horrible for scavenging, so they were stealing from Peter to pay Paul by running the roller rockers...

[Bert]

Bert, all North American EFI B3s are 63 hp, and the Aspire exhaust manifold is horrible for scavenging, so they were stealing from Peter to pay Paul by running the roller rockers...

I don't doubt that, but I'd like to see some numbers. And your valued and expert opinion is the first of these. Next question: What did Mazda do in other markets to come up with 73 hp out of a B3? If Saipa/Kia/Mazda or someone else actually makes twin cam heads, that we could affordably get hold of, that would be a real boost.

[Festevil3]

^DOHC b3 hmmmmmm that would be awesome

[FestYboy]

the festiva GT-A had the DOHC B3 (Japan only) and made ~88hp. Bert the 73hp B3 that you refer to is installed in eastern market 323s (BF/G only) and Laser, they mistakenly pulled the info from the Mazda B series engine article without verifying which cars it was installed in. the higher HP engine was destined for the larger cars (323 and Laser) where the Aspire and Avella kept the 63hp version. they also state the the 72hp engine is a 16v sohc. i've seen one of these heads and they are WIERD and i can't say that they'd swap over without all the fixin's to go with them.

that and the FSM also states 63hp...