Fab9Tuning's NC MX-5 Turbo Kit Discussion- EFR/Garrett V-Band
#121
Alright guys, it's now 2am here and after multiple 14-16 hour days I've finally produced a "pre-production" spec kit and installed it on our own NC. This kit was produced using the same method, jigs and component list that will be shipped to each customer. Over all I'd estimate the installation will take an end user around 7 hours and a 6-pack or two to complete. This is in a perfect world with the required tools on hand. This time will be quite a bit shorter for a shop with a proper lift and appropriate tools.
The installation was impressively smooth. It's not an easy installation by any means as the NC engine bay is VERY tight - but each component fell into place just as it was designed to without any questionable actions required.
Whats next? We now have measurements for coolant/oil lines and a proper list of needed components. The first kits will be packaged this week and 3 pre-production guys will be invoiced for their remaining balance.
With zero tune we were able to do very little driving but it seemed VERY eager to get into boost...
The installation was impressively smooth. It's not an easy installation by any means as the NC engine bay is VERY tight - but each component fell into place just as it was designed to without any questionable actions required.
Whats next? We now have measurements for coolant/oil lines and a proper list of needed components. The first kits will be packaged this week and 3 pre-production guys will be invoiced for their remaining balance.
With zero tune we were able to do very little driving but it seemed VERY eager to get into boost...
#131
Alright gents, another late evening producing these kits. As many of you know we run the very busy e-commerce side of the business during the day. These kits, with their attention to detail and immediate popularity have truly become a business on their own and we have you early adopters to thank - not for the late hours but for reminding us why we're in this industry. You preproduction guys have been the most important factor of this whole process. That support has pushed us harder to make this kit stand out, use better materials, and refine our fabrication processes.
For us it's not good enough that we're doing the best WE can, we're driven knowing we are creating the best solution, period.
Wrapped up 5 charge pipe kits last night in addition to the 3 that are already produced and shipping Monday. Not sure the other guys have room to rub anything in, these are pre-production customers, not kits. We've sold nearly a dozen of these kits and are on schedule to have 8 of them will be shipped in less than 3 weeks - Didn't take over a year to get a single car on the road
The quality of this manifold is truly unmatched. The prep that goes into each schedule elbow piece really shines through on the final product. Fully chamfered, perfect fitment and back purged welds that will perform as good as they look.
We will try to keep updates frequent but it's crunch time now that each component is finalized.
For us it's not good enough that we're doing the best WE can, we're driven knowing we are creating the best solution, period.
Wrapped up 5 charge pipe kits last night in addition to the 3 that are already produced and shipping Monday. Not sure the other guys have room to rub anything in, these are pre-production customers, not kits. We've sold nearly a dozen of these kits and are on schedule to have 8 of them will be shipped in less than 3 weeks - Didn't take over a year to get a single car on the road
The quality of this manifold is truly unmatched. The prep that goes into each schedule elbow piece really shines through on the final product. Fully chamfered, perfect fitment and back purged welds that will perform as good as they look.
We will try to keep updates frequent but it's crunch time now that each component is finalized.
#134
Yeah, the '06 thru '08 had the bizzaro rod bearing issues; they'd go AWOL seemingly at random. Even folks with stock power levels would suddenly find themselves strapped to a low yield shrapnel bomb while putzing down the street in traffic.
I'm not as convinced about the superiority of the 2.5L over the 2.0L, although it truly depends on what you are looking for. I prefer the happier-to-rev 2.0L block, as the 2.5L has the far lower rod-ratio which gives it great low-end grunt but kinda falls flat after 5k. If I explodey my 2L block, I'll probably either go full LS-tarded with it, or else build a bored 2L block with better flowing heads and a set of aftermarket cams.
Also don't forget: the NC transmissions, even the NC2 and later models, all seem to give up when you cross the 350TQ line with any regularity. I'm going to see what I can do (with assistance from my tuner, of course) to keep the torque at or near the 300 mark and just use the extra RPMs to make power. That still gives me headroom for a 400HP monster, hopefully with less worry about shearing teeth or cracking the case.
We shall see.
I'm not as convinced about the superiority of the 2.5L over the 2.0L, although it truly depends on what you are looking for. I prefer the happier-to-rev 2.0L block, as the 2.5L has the far lower rod-ratio which gives it great low-end grunt but kinda falls flat after 5k. If I explodey my 2L block, I'll probably either go full LS-tarded with it, or else build a bored 2L block with better flowing heads and a set of aftermarket cams.
Also don't forget: the NC transmissions, even the NC2 and later models, all seem to give up when you cross the 350TQ line with any regularity. I'm going to see what I can do (with assistance from my tuner, of course) to keep the torque at or near the 300 mark and just use the extra RPMs to make power. That still gives me headroom for a 400HP monster, hopefully with less worry about shearing teeth or cracking the case.
We shall see.
#135
Yeah, the '06 thru '08 had the bizzaro rod bearing issues; they'd go AWOL seemingly at random. Even folks with stock power levels would suddenly find themselves strapped to a low yield shrapnel bomb while putzing down the street in traffic.
I'm not as convinced about the superiority of the 2.5L over the 2.0L, although it truly depends on what you are looking for. I prefer the happier-to-rev 2.0L block, as the 2.5L has the far lower rod-ratio which gives it great low-end grunt but kinda falls flat after 5k. If I explodey my 2L block, I'll probably either go full LS-tarded with it, or else build a bored 2L block with better flowing heads and a set of aftermarket cams.
Also don't forget: the NC transmissions, even the NC2 and later models, all seem to give up when you cross the 350TQ line with any regularity. I'm going to see what I can do (with assistance from my tuner, of course) to keep the torque at or near the 300 mark and just use the extra RPMs to make power. That still gives me headroom for a 400HP monster, hopefully with less worry about shearing teeth or cracking the case.
We shall see.
I'm not as convinced about the superiority of the 2.5L over the 2.0L, although it truly depends on what you are looking for. I prefer the happier-to-rev 2.0L block, as the 2.5L has the far lower rod-ratio which gives it great low-end grunt but kinda falls flat after 5k. If I explodey my 2L block, I'll probably either go full LS-tarded with it, or else build a bored 2L block with better flowing heads and a set of aftermarket cams.
Also don't forget: the NC transmissions, even the NC2 and later models, all seem to give up when you cross the 350TQ line with any regularity. I'm going to see what I can do (with assistance from my tuner, of course) to keep the torque at or near the 300 mark and just use the extra RPMs to make power. That still gives me headroom for a 400HP monster, hopefully with less worry about shearing teeth or cracking the case.
We shall see.
#136
I agree with the higher flowing heads, although if we're talking built motors again, you can just swap the 2.5L heads onto the 2.0L block and we're back at square one.
Also, while the 2.5L can rev as high as the other MZR's, the shorter rod ratio means the torque rolloff at high RPM will be significantly worse. Even with cams, even with head work, the rotating assembly geometry isn't right for an efficient high-revver.
Finally, all things equal, the 2.5L swap still ends up mating to the NC transmission, which is fundamentally limited to something moderately below 400TQ. A "built" 2L would end up being cheaper, have a flatter powerband, and would still out-power the capabilities of the transmission when compared to the 2.5L.
Can't argue with more displacement, I get that. Still doesn't seem like a real slam dunk to me
#137
Yeah I wasn't talking built motors. The rods on the 2.5 on like they belong in a diesel.
All the mzrs without a key (all stock) on the crank pulley aren't recommended to be run above 7400 rpm based on the testing cosworth did developing race motors and people have run stock 2.5s to 8k already.
The biggest difference is that there's at least 3 2.5s between 300 and 750 at every single junk yard near you, where you're lucky to find an nc2 motor at all and if you do they're around 2k. If you already have an nc1 motor it's probably cheaper to buy the nc2 forged crank and oil pump from mazda and put aftermarket rods in it than buy an nc2 motor.
All the mzrs without a key (all stock) on the crank pulley aren't recommended to be run above 7400 rpm based on the testing cosworth did developing race motors and people have run stock 2.5s to 8k already.
The biggest difference is that there's at least 3 2.5s between 300 and 750 at every single junk yard near you, where you're lucky to find an nc2 motor at all and if you do they're around 2k. If you already have an nc1 motor it's probably cheaper to buy the nc2 forged crank and oil pump from mazda and put aftermarket rods in it than buy an nc2 motor.
#138
Take the .5 liter displacement with a turbo any day. Tune to hold 300wtq. According to some of the reading, 2.5 doesn't need to be built. What's not to like?
And I've never been a fan of stroke/bore ratios being responsible for rpm capabilities. That's the job of cams/headflow/intake manifold flow. At least on any passenger car derived engine.
And I've never been a fan of stroke/bore ratios being responsible for rpm capabilities. That's the job of cams/headflow/intake manifold flow. At least on any passenger car derived engine.
#139
I haven't actually seen the rods on the 2.5L; now I'm genuinely curious. The Cosworth 7400RPM thing is a bit of a headscratcher, since the 2L blocks are factory 7500RPM redline and there's a number of them out there doing 8K+ for racing application.
I guess the 2.5L block is cheap because of all the Fords using them? I know the Fusion is a common and plentiful donor.
I guess the 2.5L block is cheap because of all the Fords using them? I know the Fusion is a common and plentiful donor.
#140
A lower rod-ratio engine means smaller delta between average and peak piston speeds, meaning you can keep slightly smaller valve openings to maintain velocity (versus having to go for outright flow to keep up with the higher piston speed) which helps with atomization and more efficient cylinder evacuation and filling. The lower peak piston speed also means slightly longer duration (given equal RPM) for your ignited air/fuel mixture to exert force on the face of the piston during the power stroke.
Both reasons are why longer rod-ratio engines have a flatter power curve. Any work you do to a shorter rod-ratio engine to "overcome" these two obstacles can be equally applied to the longer rod-ratio engines with the same results.
The only REAL win here is apparently the significant cost difference due to cheap, plentiful supply of good quality junkyard donors. I didn't realize how big the difference was until I did some google thanks to Leafy, but he's right - the 2.5L blocks are cheap.
The extra displacement helps a bit, sure, but you're going to snap a transmission if you really want to use it all. Given how cheap they are and given how the NC1's like to eat rod bearings, I think Chili has it right -- the 2.5L swap is probably the best way to go afterall if he's buying an '06-'08.