NitroDann's Long Awaited Garage Thread

M1474 · Postby **M1474** » Sat Mar 16, 2013 1:24 am

Awesome figures Dann, you should be very proud.

Sean · Postby **Sean** » Sat Mar 16, 2013 1:06 pm

NitroDann wrote:The highest pull wasnt the final run. The bit at the end was flattened which doesnt affect the peak HP area, but no other run made over 324rwhp.

There is a 4 page argument over at MT if you want to see people misunderstand what I said above.

It was smoothed at the end and ONLY 3500rpm onwards and 4psi onwards was tuned. Still needs a day on the road to finish it.

The less boost the better flowing the setup is, take this and put it on a 325rwhp N/A engine and do it at 0 PSI.

It has a completely 100% stock inlet side right down to the factory 55mm TB.

Dann

Cool - Not on MT, not my type of forum...
pushing 325 through a stock intake side is borderline, you may well find that's your flow limitation.

Postby **NitroDann** » Sat Mar 16, 2013 1:08 pm

The turbo is rated for like 280crank hp, I d say thats the main limitation haha.

Dann

Sean · Postby **Sean** » Sat Mar 16, 2013 1:16 pm

NitroDann wrote:The turbo is rated for like 280crank hp, I d say thats the main limitation haha.

Dann

I've saw mine make similar, like I said earlier we got slightly more boost out of it, but round the more boost didnt aid in more hp back to back, it just made things get hot...

We'll see when you put the EFR or something else big on it I guess. EFR results are no doubt hotly anticipated by many. Should be sweet.

Postby **Boyracer** » Sun Mar 17, 2013 7:36 am

What boost do you plan to run for track work?

I can see the driveline needing some upgrades.

Postby **NitroDann** » Sun Mar 17, 2013 7:50 am

It will be on megasquirt ebc, still running 22psi ish.

It has a NB driveline in it.

Not sure what will break from here. With a good set of solid mounts and some braces from chassis to engine to stop it twisting around a lot it should be ok I hope.

Dann

Postby **Boyracer** » Sun Mar 17, 2013 9:21 am

The race cars running 16-18 PSI have broken axles, diffs, gearboxes... Solid engine mounts certainly help. Front hubs don't last long if its running big brakes, also need to keep an eye on the front cross member, have seen them cracking around where the control arms mount.

Postby **NitroDann** » Sun Mar 17, 2013 11:02 am

Thanks a lot for the advice, mr Gough has warned me of a lot of that.

It has some huge 8..maybe 6 piston AP's on it.

perhaps we should keep some spare driveline components.

The yanks seem to go ok at these power levels, Ive read no diff or axle issues but 6 speeds become a 2 season wear item.

It will be interesting to see, because this car has a LOT of torque.

Dann

little decks · Postby **little decks** » Mon Mar 18, 2013 11:03 pm

Much of the driveline issues come from running fairly big (for an MX5) slicks, once we started putting the stickier Michelins on the cars went quicker but the traction loaded up the driveline

Postby **NitroDann** » Mon Mar 18, 2013 11:12 pm

This poor car has 17x9 with carrera cup slicks.

I dont have high hopes after all of this reading haha.

thankyou for the input

Dann

little decks · Postby **little decks** » Tue Mar 19, 2013 4:40 pm

yeah she is gonna struggle, it's also more of an issue with the torque rather than the peak power, when you have the turning moment from the crank opposed by the tractive effort all that load will every now and then find a weak spot in the driveline to give way which is either 3rd or 4th gear or an axle.

Postby **NitroDann** » Tue Mar 19, 2013 4:57 pm

Custom axles are easy enough.

6 speeda arent, good opportunity to do an RX7 trans/diff swap though.

Dann

hks_kansei · Postby **hks_kansei** » Tue Mar 19, 2013 5:25 pm

Just run OEM daisys on the back with some Nankangs.

I guarantee they won't allow the diff/box to load up.

Would it be worth the effort to get/make an adapter plate to mount other gearboxes to the engine? (ie: stronger boxes than the RX7, I know Supra/Celica boxes used to be a common swap for V8 holdens back in the day)

Postby **NitroDann** » Tue Mar 19, 2013 5:35 pm

Well....

I dont know enough about it, here in Australia people talk about breaking drivetrains all the time, however in the USA a few mods are made and everything seems to go ok by all accounts.

No offence to anyone on either side but Im just a bit confused as to what the facts are, or perhaps no one really knows and whether stuff breaks comes down to luck.

On the upside, this will have some pretty clever boost control so we can tune out the big torque ramp it has a little to give it an easier time, without sacrificing any performance hopefully.

You will see it at South circuit next trackday, it will slaughter the huge slicks dont worry, no need for daisys to drift.

Dann

Sean · Postby **Sean** » Tue Mar 19, 2013 6:59 pm

hks_kansei wrote:Would it be worth the effort to get/make an adapter plate to mount other gearboxes to the engine? (ie: stronger boxes than the RX7, I know Supra/Celica boxes used to be a common swap for V8 holdens back in the day)

There was one machine shop here in Aus making custom adapted kits for the RB25 box. I contqcted him earlier this year and he claimed to have thrown out the jig and no longer be interested in doing such work for a couple of reasons (not related to power etc).

I know a couple of people here run his set-up, and CT had one is his race car too.

There are also plenty of guys in Aus making good power in race cars and street cars who don't seem to break them, and guys making not so much who break lots - I suspect driving like a spasticated monkey helps break them, and having either a little bit of mechanical sympathy or a dwindling bank account seems to make them last a bit longer.

The mounts etc seem to have solved a lot of the problems though - which makes sense really...