Could it be in the tune?
#1
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I recently picked up a Dprepared Miata for autocross. It's a 93 with a 94 1.8l. The motor has been built and has a stand alone megasquirt ecu.
Details
combustion chambers have been polish.
Ports polished and gasket matched.
s/s Supertech valves with stiffer springs, not oversized
stock cams.
Block was decked .015
crank balanced
Eagle h-beam rods with ACL race bearings.
Mazda 2001 pistons.
Stock lifters
3 angle valve job
It has a upgraded fuel pump, ss lines, a custom fuel rail and NB rebuilt injectors.
The dyno plot I saw showed 140whp and 123 tq. But doesn't that seem a bit low for the modifications? I still have a few questions for the previous owner that he hasn't got back to me on.
I'd appreciate any help or answers you'd have.
Details
combustion chambers have been polish.
Ports polished and gasket matched.
s/s Supertech valves with stiffer springs, not oversized
stock cams.
Block was decked .015
crank balanced
Eagle h-beam rods with ACL race bearings.
Mazda 2001 pistons.
Stock lifters
3 angle valve job
It has a upgraded fuel pump, ss lines, a custom fuel rail and NB rebuilt injectors.
The dyno plot I saw showed 140whp and 123 tq. But doesn't that seem a bit low for the modifications? I still have a few questions for the previous owner that he hasn't got back to me on.
I'd appreciate any help or answers you'd have.
#8
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
BP05 is the OEM 1994-97 head. Bad choice (BP05 top, BP4W bottom):
![](https://www.miataturbo.net/attachments/engine-performance-56/170629d1462487561-could-tune-bp05-vs-bp4w-head-comparison.jpg)
Miata Engine History and Interchangability Guide
RB header is quite a bit better than the stock piece.
![](https://www.miataturbo.net/attachments/engine-performance-56/170629d1462487561-could-tune-bp05-vs-bp4w-head-comparison.jpg)
Miata Engine History and Interchangability Guide
RB header is quite a bit better than the stock piece.
#9
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
BP05 is the OEM 1994-97 head. Bad choice (BP05 top, BP4W bottom):
![](https://www.miataturbo.net/attachments/engine-performance-56/170629d1462487561-could-tune-bp05-vs-bp4w-head-comparison.jpg)
Miata Engine History and Interchangability Guide
RB header is quite a bit better than the stock piece.
![](https://www.miataturbo.net/attachments/engine-performance-56/170629d1462487561-could-tune-bp05-vs-bp4w-head-comparison.jpg)
Miata Engine History and Interchangability Guide
RB header is quite a bit better than the stock piece.
Thanks, there goes the shock money. lol
![Biggthumpup](https://www.miataturbo.net/images/smilies/biggthumpup.gif)
#10
mkturbo.com
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (24)
Join Date: May 2006
Location: Charleston SC
Posts: 15,189
Total Cats: 1,685
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Realistically you want a 01-05 vvt head. They top out the same as the 99/00 head but have a bit more area under the curve due to vvt. You will also need a ms3 of some type to control the vvt, or the diy autotune vvt tuner.
#14
mkturbo.com
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (24)
Join Date: May 2006
Location: Charleston SC
Posts: 15,189
Total Cats: 1,685
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Xida's are hands down the shocks to buy if you are tracking the car. Emilio@949Racing has put more R&D into miata shock development then any other company and has the wins in national races to back it up.
#15
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
![](https://www.miataturbo.net/attachments/engine-performance-56/170630-could-tune-80-image_bb5e11e847a10c843f4eeffcbb45ae72f576b856.jpeg?dateline=1462492487)
![](https://www.miataturbo.net/attachments/engine-performance-56/170631-could-tune-80-image_afb6793afb20a538102f612e6ab67b6ec49b28fb.jpeg?dateline=1462492487)
![](https://www.miataturbo.net/attachments/engine-performance-56/170632-could-tune-80-image_79e93c1adbeade484ee7daa5f6073cf79a37cb99.jpeg?dateline=1462492487)
There are tons of different megasquirts out there. Only the ones of the Megasquirt 3 variety can control VVT. Post a picture of what yours looks like and we may be able to tell you what type it is.
Xida's are hands down the shocks to buy if you are tracking the car. Emilio@949Racing has put more R&D into miata shock development then any other company and has the wins in national races to back it up.
Xida's are hands down the shocks to buy if you are tracking the car. Emilio@949Racing has put more R&D into miata shock development then any other company and has the wins in national races to back it up.
#17
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I haven't had the chance to run it yet, but I've been upgrading a few things that I see are inevitable, like the rear brakes to sport and 15x10's with 275's.