Bryan has broke half shafts at 350? Launching the car at the strip. Maybe someone can go back through his build and confirm.

Bryan has also broke his PPF north of 400.

Bryan also broke his diff carrier (one of the ears i do believe) north of 400. (he does have 3.363 gearing which may be something to think of.

Perhaps someone should cruise back through his build thread and confirm some of this stuff. I can link him to this thread too, he may have some decent input. These are some of the lower end numbers of the parts as he drives his car pretty dang hard.


This is just my opinion, but a reroute should be required if you decide to do any type of forced induction and or track driving at all. Hell. I think it should be required even if you're in a hot climate.

Was making 205hp with 1.8 injectors when we had the 1.6 still in the car. Also can't believe stock fuel pump will support 275hp.

Thank you, i found that thread. Some good numbers. I couldn't see if MSM axles were being used, but i'd assume so. They are in the table now. Also took the easy way out on the oil/coolant.

I have also found a few good posts from savington RE revs, so theres a few entries in there for that now.

Ive added a thing for fuel pressure on the injectors, thats a good thing to think about.

Fuel pump: Fuel Pump - Miata Turbo FAQ

Anyone know how much pressure the stock injectors will take? I can work out the rest.
Also, PPF, and the upper limits of the half shafts (and now head gasket) are still AWOL. Also pistons.

I lied, more tweaks:

Miata2fast broke several halfshafts/cv shafts while naturally aspirated and running at the drag strip. 1.8 car using '99 head, cams, 12:1 pistons, carburetors, so 150hp?

Anyone know the limits of the stock fuel rail?

I'd say it's probably well above 200 psi. Maybe even well above 500 psi. Definitely greater than most fuel hoses, fuel pressure regulators, or fuel pumps.

Wait...This is the "power limits" thread. Certainly you didn't mean to insinuate that the fuel rail had a power limit, did you?

Yes, I did mean power limit. Surely the fuel rail has point where it can no longer provide a high enough volume of fuel for even distribution to each cylinder. If the flow limit was so high that we couldn't find it, there would be no reason for aftermarket fuel rails to exist.

Well marketing. I bought one because I couldnt find an FPR adapter for the stock fuel rail (because I was searching for miata parts and not shitty fwd mazda parts) and the fuel rail from 949 was cheap enough.

Most of them exist because people will gobble up any silly statement a company makes and companies make money that way. Most here have not found the limit of the stock rail, but if I had to guess I'd say it's somewhere between 450-550 or so

...I think it was hilarious that for years everyone was raving about dual feed rails, and many even made their own DIY dual feed rails. Then we go and prove that neither cyl 1 nor cyl 4 is starved for fuel, and now only a handful of people here run them, most of them "just because".


Also the nb2 is not making 130 at the wheels bone stock unless maybe its an msm

I think most people switch rails for easy use of an aftermarket FPR and easy clean AN connections. I know that's why i'm putting a dual feed rail on. More so than "just because".

That makes more sense, and is probably a good reason to run one.

So there's the real reason, OP :)

right... market a paper bag full of shit properly and someone will buy it. I get that.

I am simply trying to figure out if i will need more than a new fuel pump in my 2000 with 600cc/min injectors to be able to evenly fuel 300hp on 93 octane. The returnless miatas have a better stock FPR than the NA's FPR, so i am less concerned about the FPR being able to manage the larger pump. I cant find any info on where this FPR and fuel rail become an issue.

I am also having a little difficulty in finding a clean way to reduce the pressure differential between the manifold pressure and fuel pressure since the returnless FPR is at the tank. I am thinking i will have to route a manifold pressure signal line all the way back to the tank to get something like the FUELAB 545 to work easily for me.

Or you could just convert to a return style setup.

sorry for the slight threadjack... Thank you for the answers on the fuel rail. I speculated that its limits were rather high but didnt have any info to be able to back it up.

I think you're right around the limit of the stock pump/fpr actually.

Im keeping this to sub-400 levels, partly to stop the list growing to cover every part number of the car but mostly because if you are at that power level, you know what you are doing.

Both the bosch and delphi injectors seem to top out at 8 bar delta, which puts their max power potential at 230/280hp :bowrofl: (RC Fuel Injection)

Sixshooter, im convinced miata2fast's car would have been wheel hopping. 150hp seems ridiculous.

Still learning...

Idk about the trans numbers I’ve seen many people blow 6 speeds way before they blew a 5 speed

Lulz.

Solid trolling friend.

I think every thread (except build threads and stickies) should auto lock after 12 months....

/2¢

Don't ask them to add more features...We've seen how that turns out.