Went to a rolling road day...

[Cally]

so it wont have like melted my engine or anything? I was bricking it for a while when I seen it... should I get my intercooler checked out?

[stuart wizy]

its funny how a lot of people claim big power in the south of the country, but compared to pips figures on the dynopack, other rr figures look much higher for the same setup.
last time i was down scr, there where 3 other fds there, who where claiming over 300rwhp with print outs, but when it came to the crunch they coudnt get below 14sec 1/4s  with good launches and the same 60 fts as me and quick gear changes!!
There is big variations going on between rr roads,  only the 1/4 mile times will prove this.

[Cally]

Well I am guessing mine would have been higher without the high intake temp so I dunno how accurate either of the rolling roads are.

I was just worried it could have done something nasty.

[ScuttleRX]

Dont worry it wont have done anything, if it had you would know something about it by now

Its just when the temps are high it can increase the chance of detonation, and this can be a one hit wonder with rotaries.

If you have a PFC and commander i like to monitor the air temps on there, only time you tend to get high temps is either a high boost situ like track day (how well the temps stay down will depend on your intercooler), or when your sitting in traffic (or on a dyno, or queue for a drag strip) and everything starts to get heat soaked.

[Cally]

I dont have a commander, need to get one but unsure where to get one and what one i need for my model of ecu.

Thanks for your answer youve probably allowed me to sleep tonight! lol

[ScuttleRX]

lol, what year is your car, there are 3 types of commander for FD, from memory there are for 92-96, 96-98, and 98+.

If you have a 96 car that can prove the awkard year (as I found out!) as you have to doubly make sure you have the right one!

If you do a search there should be a few threads on here showing serial numbers for correct numbers, somewhere like Nengun should have them listed for specific years aswell, or any of the vendors will sort you out.

[antnicuk]

its funny how a lot of people claim big power in the south of the country, but compared to pips figures on the dynopack, other rr figures look much higher for the same setup.
last time i was down scr, there where 3 other fds there, who where claiming over 300rwhp with print outs, but when it came to the crunch they coudnt get below 14sec 1/4s  with good launches and the same 60 fts as me and quick gear changes!!
There is big variations going on between rr roads,  only the 1/4 mile times will prove this.

I dont think the strip is a good place to compare rolling road figures (mine was tuned down south).  The driving has a lot to do with it. Also, the torque figures which no one seems to think about.  The peak final BHP is pub talk.  But even when running up the strip you can still see over 1 second differences between each run.

[Cally]

Its an 92\' model. Ive seen serial numbers etc when searching before but was unsure where would sell a commander on its own, been watching ebay but nothing has came up. I think I really should get one now though.

[dubber91]

rolling roads differ. dyno dynamics dynos are a low inertia dyno with eddy current braking. Other dynos (like dynojet) tend to be inertia dyno: basically using heavy flywheels to give a linear resistance to motion.
Dyno dynamics dynos have a constant load mode in order to do a power run: acceleration is set and the torque acting against the brakes is read, and recorded. Inertia dynos fix the revolution speed at each point: hence the many readings you have on the ava printout, each of these was a point at which the car was driven at steady speed.
The problem with this is that you dont get a true dynamic response, transient fueling is more difficult to get spot on and the momentum in certain components isnt accounted for. AVA readouts are smoother as each point is tested and the lines joined, whilst dyno dynamics readouts are true and show flat spots and areas of unsure mapping.
Doing a dyno run on a dyno dynamics dyno is more realistic as it is closer to what you experience when accelerating on the road, and not just joining the dots.
dyno dynamics dynos have integral and very well controlled correction sensors for inlet air etc, others, i have heard are easier to tamper with.

it might go some way to explaining some of the discrepancies

[peterwolds]

I dont have a commander, need to get one but unsure where to get one and what one i need for my model of ecu.

Thanks for your answer youve probably allowed me to sleep tonight! lol

http://www.nengun.com/catalogue/product/143 seems a good buy

[Cally]

Yeah my mate linked me up with that last night, just gotta find out about import tax on it.

[Cally]

Another question, if I was to fit a FMIC would I need to get my apexi remapped or would it be ok to leave the map?

[Cally]

anyone know? As I am unsure if anyone maps rx7s up here...

[strange_days_uk]

It\'s always good to get the car mapped with any mods.

A front mount by it\'self would not necessarily require a remap, as the apexi will read the lower intake temps and therefore inject more fuel, however if you want to get the most from your car you really should get it mapped.

Another place to get the Commander - RHD will happily lower value for invoice therefore less/no import duty

[nikp]

Also, the changeover point from single to twin turbo is 4500rpm only if full throttle is used. If partial throttle is used, then the changeover point differs. Could be one reason why that point is not evident.