honestly not sure my peak everything is at 4K so nothing too big my auto builder is in control of all that i have shown him the original dyno sheet when it was manual and he saw the recent one and has made adjustments to suit

It feel perfect alot more responsive revs up heaps easier drives well low boost blazes 2nd gear it never used to do that

i have still got a spark issue on high boost even with my LS coils i think i may have the dwell settings wrong cause it 100% a boost related issue i will check that if that's not it i will upgrade the active wire to the coils other than that iam lost for idea's


i also built a new intake to get every little bit i can
https://cimg0.ibsrv.net/gimg/www.mia...c64e265151.jpg

On my IGN1A coils (sort of similar to GM coils) I run 6ms dwell in boost. That will fire a .030" gap at 38 PSI boost.

Also would love some videos showing how the converter flashes from a stop when you floor it. And any other videos in general. :)

i will try and get video's Tuesday its now at a friends factory with the Dyno we were going to run it up last night but he killed his computer that runs the Dyno the converter builder also asked for a video of were is flashes to on the street so i will have to do it at some stage

its spot on makes exactly the same power but now it flares up and keeps climbing and feels a a lot better to drive i have worked out what my misfire my ecu had a boost cut set right on the edge of my boost and the auto now loads it up a bit more than with the manual so we have fixed that

only issue is any more boost it leans out cause i have run out of injectors so i need to buy a set of 1550cc injectors to my tuners preference and we will turn it up from 25 psi to 30 psi and get close to my 300 rwkw again



https://cimg8.ibsrv.net/gimg/www.mia...6b70b6e037.jpg
https://cimg0.ibsrv.net/gimg/www.mia...a83e4695ed.jpg

UPDATES

its made more power with the better converter iam not happy with trans temp's so i bought a monster cooler but i have to make room for it in the rear of the car

i cannot get my go pro working only video i have is of the car trying to jump off the dyno and it was strapped very very hard. It's back at home now so iam going to clean some stuff up maybe make a new catback as i think there is some power to be found there too all the little bits count the next step
on my plans is weight reduction
https://cimg1.ibsrv.net/gimg/www.mia...a1641654ab.jpg


https://cimg5.ibsrv.net/gimg/www.mia...a63ac3c6c7.jpg
https://cimg6.ibsrv.net/gimg/www.mia...8b4ae96bcc.jpg

267kw is about 363hp, so nobody else has to look it up.

made the new rear exhaust section 3" stainless and new straight through muffler i offset the muffler so i have room on the passenger side (here in OZ) to fit my trans cooler cars also booked in with my tuner on the 23rd try and squeeze a little more power out of it next step is taking it to the drags in the next month or so and see how it holds up

https://cimg0.ibsrv.net/gimg/www.mia...c0ea0b9401.jpg
https://cimg2.ibsrv.net/gimg/www.mia...c5c132db69.jpg

So we turned it up a fair bit the Turbo is Maxed at 26psi and wont give me any more we managed to make it come on a lot harder which is the green line for boost on the photo and it backs up 300rwkw each time.

We tried to take it to the drags but my tow car bailed. I am going to try again on the 21st the only issue is it is now very very hard to put the power down i drove it recently on 280rwkw and you could modulate 2nd on the street but this next level is a lot harder iam just hoping the drag strip has a lot more grip or i have to buy new tyres.

i have enquired about widening stock rims to 15X8's has anyone else done this before ?


https://cimg5.ibsrv.net/gimg/www.mia...fe35209705.jpg
https://cimg7.ibsrv.net/gimg/www.mia...1a87e051c7.jpg

Nice!

I have looked into having stock 15's widened from 6" to 8", and it was 300/wheel plus shipping both ways from a reputable place online located in the states. And then I'd need some custom wheel spacers to get the offset right, which are more money. I never did it, but would like to at some point. If I could find a local place that would do it for a fair price I would.

What ignition timing are you running at 26 PSI for 300rkw?

17.5-18.8 degrees on my ignition table which is were it is happy i have tried 1 more degree and it only gets me 4-5 rwkw

sounds like it's still got room to go, but it's not like you need any more power :D

Thats the funniest shit I've heard all day.

For real!

OK long time from posting

But iam hopefully taking the car to the track on Friday to get a feel for the car and what it wants to do then early next year i will be fitting the 235/60/15 Micky Thompson tyres and softer suspension to see if i can get a better time.
https://cimg0.ibsrv.net/gimg/www.mia...b08f49b6ef.jpg

10.85 on my second run with a shit 60 hoping there is more in it
https://cimg7.ibsrv.net/gimg/www.mia...30c8c803fc.jpg
https://cimg8.ibsrv.net/gimg/www.mia...7633e1bedb.jpg

Theres your goal.

Fuck me, well done mate.

Dann

Wow! 10.85 @ 125! 402 whp! Just wow.

If you put some wrinkle wall slicks on there and got some more R&D and I bet you could hit 10 flat

Managed to find some MPH my best was 129.3 but i kept fucking up the launch

next time ill take better tyres than rock hard A048's and ive been told it should do a mid 10

best part is drove it home didnt break anything

That’s great man!

I see much better with a few changes.

Great job, with a little more practice you'll get the launch down.
Very nice 10 second Miata, congratulations on not breaking anything too. :bigtu:

After looking through the thread, I assume you still have the 3.63 gear. Any idea what rpm you had at the trap?

Yes i still have 3.63's i just get over the line about 6500-6800rpm in the top of third my car hits limiter at 225kmh

so ive got a little more mph to find and im maxed out i wish miata roadster did there 3.3's they were hinting at years ago

Best combo is lower gear, taller tire, and trapping near redline for maximum results.

Redline in what gear? I think you mentioned before that the 1:1 gear is where you want to redline.

now that's a proper slip
https://cimg8.ibsrv.net/gimg/www.mia...2a09d8d9ad.gif

Well its doing that now

Weight reduction
 

Does anyone know how much weight reduction makes a difference to time ?

Cause i havent done any of that yet will it be worth it.

It's hard to say, but if you lose 200lb (definitely possible without any drastic measures, I've done it) you should gain at least 2 tenths

Weight reduction is a very important part of your strategy to go faster. It made a big difference with my car, and one of the reasons why my car 60’s better than most cars in my power level. As far as how much of a difference, it depends largely on how much power you already make. Higher horsepower cars will see less of a difference than lower power to weight cars.

I also think keeping the weight down makes drivetrain parts live longer.

The stock seats are extraordinarily heavy.

Nice times! That is fast. As for weight, of course less helps, as mentioned 100lbs is about a tenth. That is one thing that kills my car, everything is made of steel, and I've added weight, and removed none. If you have easy weight you can remove, sure, but if you wanna go faster I'd just add more power.

My next jump in power is very expensive i was hoping weight was the answer To help drop my time.

I might remove all the sound deadening and swap out seats which i need to do anyways i have to race with the top down cause i dont fit with a helmet on.

see if that helps me.

There is a whole lot of free weight savings there. All you need is time.

Another possibility
 

I may have access to a universal kit a a 50-75-100hp shot for $700 has anyone else done this and how does these engines respond to the bottle as i have no experience in this area. On a other note i ordered my 225/50/15 micky thompson ET street R's today i will have them very soon.
https://cimg6.ibsrv.net/gimg/www.mia...463f7302e5.jpg

Miata2fast's car is on the bottle and he has done many passes with it on his old setup. I am sure he will chime in here shortly. I know he loves it and is putting an nitrous setup on his new engine as well. I think he was doing 100-200 shots on the strip but he was running NA.

Nitrous is a great way to make power if you are willing to take the time to learn how to use it and spend time developing the system so it is safe and reliable. I have used it on several platforms, and will continue to.

Whether its its right for you or not is hard to say. Nitrous has a tendency to attract those looking for easy fixes for a problem when in fact it takes serious commitment, and has major consequences if you are careless. Another thing to consider if you plan to compete is now you have multiple power adders. That’s not allowed in some classes, or may put you in a class that is very hard to compete in.

The price tag you see will balloon significantly when you factor in all supporting work to make it safe and reliable. It’s still a very affordable power adder though.

If if it were me, I would continue refining what you have until it is working very well, and if you have the resources and desire to go much faster, consider it than.

In terms of power/acceleration, it will do phenomenal things to your powerband.

i am not fussed about the class issue more the reliability one for example what would be the the reliable expectation of jetting 50hp or 100hp should i be concerned about my ring gaps not being setup for nos if they need to be or what do i get colder plugs.

Most turbo setups shut down the nitrous when at full boost. Is this your plan? If it is, you should be fine with current parts. Might need to go a tad colder on plugs.

That was not really the plan i was hoping to launch click second gear and push the go baby go button i thought a 75hp shot was realistic as i could just fatten up my fuels a little and throw a wet-shot onto it.as my timing is apparently already very conservative.
https://cimg2.ibsrv.net/gimg/www.mia...d488a17b0f.jpg

Do it! That's a very realistic shot. If you're adding nitrous for power, I'd go for a 100 shot out of the gate.

Megasquirt can do table switching for adding fuel with nitrous the "right way" if you want.

the advice i have recieved which is run a slightly larger fuel jet and pull a lot of timing and work my way up i wish i had a megaquirt or haltech but the aem i have is very basic so i have to be a little careful but at the moment im at 20-22 degrees at the moment and 12.8 fuels and 26 psi.and from what iam told thats conservative i will have the kit monday and i have started looking into a bottle heater and remote pressure gauge

Almost forgot one very important thing I learned the hard way. Nitrous is notorious for blowing the back cylinder on inline fours. If you have a single fogger and it’s very close to the throttle body, the back cylinder will ingest most of the nitrous. You need the fogger at least 9 inches upstream from the throttle body so the charge mixes properly with the incoming air.

I’ll never again run nitrous with a single fogger because of the mixing issues.

If I did a single fogger setup, it would be as far as possible away from the throttle body. In my case, I'd put it just after the exit on the intercooler.

Tyres are on 225/50/15 mickeys are a fair bit taller and seem a fair bit wider its a perfect fit. I still waiting on Nitrous kit they fucked up the order i am also going to order a bottle heater and a window switch and a purge kit as i want to do this properly.

https://cimg0.ibsrv.net/gimg/www.mia...83bd0fb56f.jpg

Remind me which Mickey Thompson you went with. I could not find it in the thread.

225/50/15 mickey thompson ET street R

Nice!

Plan to test tires before nitrous? I am dying to see the difference in tires alone.

So bad ass.

Ok i have the kit i will start making the mounts for the boot and start looking into controllers.

I am going to the drags this Friday and see how much difference the tyres make then i will go again but with the bottle the only question i am hoping someone can answer i have a walbro 460 in-tank pump i wont be anywhere near its limit or my factor hard lines will i ?

https://cimg4.ibsrv.net/gimg/www.mia...e72cc0ffeb.jpg

Pump is plenty enough, but you really should upgrade to 3/8th” fuel lines.

why's that?

OP is already around 400 whp, so on nitrous could be anywhere from 450 to 500. The curvy 5/16 fuel line from tank to fuel rail creates an awful lot of friction to keep up with the gaping hole feeding both injectors and fogger nozzles. Particularly when you factor in the sudden release of fuel and harder g force in drag race conditions.

So the bottle is mounted probably a little overkill



https://cimg0.ibsrv.net/gimg/www.mia...e682043986.jpg
https://cimg1.ibsrv.net/gimg/www.mia...4157e8a7e9.jpg
https://cimg3.ibsrv.net/gimg/www.mia...80e51db972.jpg