Marks RX7 - lets break a rotary.

[Mark Davis]

good stuff, how long till the engines run in and stuff?

I’ve done about 70 miles, shooting for 1000 this time.

 

[Big Steve - Raider]

Fab news @Mark Davis ! Love the plate!

 

[DaveL485]

I’ve done about 70 miles, shooting for 1000 this time.

I dont think you need 1000 miles.

If you average 3000rpm for 3 hours of mixed driving thats 3000 x 180 = 540,000 engine revolutions, if you have anything to "wear in" or any high spots in the engine I would imagine they're gone after half a million revolutions

 

[Mark Davis]

I dont think you need 1000 miles.

If you average 3000rpm for 3 hours of mixed driving thats 3000 x 180 = 540,000 engine revolutions, if you have anything to "wear in" or any high spots in the engine I would imagine they're gone after half a million revolutions

I agree, I think 500 is plenty before tuning but I’d like to just enjoy the car before it blows up straight after

 

[Mark Davis]

Version no48 is hopefully the last oil return I’ll need.

 

[Mark Davis]

Well pleased to report the oil return has been a success.

I’ve ordered myself some ludicrously priced rear lights from RHD Japan, the same company who made my front side lights. Just a small lead time of 6 months.

 

[andybond]

Excellent news on the oil leak.

Slightly less enthusiastic about the 6mo lead on the lights though

 

[Mark Davis]

350 miles of happy motoring running it in. The tune is slowly getting dialled in working remotely on the drivability/cold start stuff

On a limit of 5500 which is mega boring - the car just wants to be driven hard, I’m going to do another 100miles followed by oil and filter change and book mapping. (Hopefully early April)

We’ve decided to add methanol in to the mix - I’m shooting for 700hp this time (turbo might be out of puff by then) what could possibly go wrong?

 

[Mark Davis]

The running is as good as done, I’ve changed oil and filter plus awaiting plugs to arrive.

I’ve got 10ltrs of methanol as going to try a 50/50 mix this time.

I gave it a wash, Polish and wax the other day using Poorboy products - easy to use and good value for money.

 

[Steve Swan]

How will you increase the fuelling? Dope won't detonate which is good, but you have to richen the mixture quite a lot to get more power. Hence the old adage about hot speedway motors having the main jet removed to increase fuelling. John Passini touches on it in his Weber carburettor books, he also comments on removing the jets, but recommends proper recalibration of the fuel slope. I suppose the main benefit of throwing so much fuel in is the cooling effect it has????

 

[Mark Davis]

I originally planned to inject pure methanol and roughly worked out it would be around 104 octane but then read that AEM who make the kit don’t recommend using pure methanol with their lines and pump.

I think with a 50/50 mix it will have some effect in terms of an octane boost but mainly using it for its cooling properties which will hopefully allow me to run 26/27psi, I think I’ll need this much boost to reach my power goals.

 

[Steve Swan]

One thing the old racers of yesteryear didn't have was access to racing fuels like we have today. I wonder how it would run on the Highest grade race petrol available today ? you would need multiple maps for good and standard fuel though, otherwise its molten metal all round!!!

 

[Mark Davis]

Not much happening with the RX7, I’m awaiting a mapping date, possibly 22nd April.

I did lower it slightly following the move from 18s to 17s, it’s only half an inch but makes all the difference.



I also ripped out the old alarm which had stopped deactivating via the key fob, going to upgrade to a new Cat1 set up with immobiliser.

Fitted a new high/low boost switch where the alarm light has left an empty hole in dash, it’s almost OE.



Future plans are a refresh on suspension, brakes and all bushings. That can all wait until the winter.

4 months to go until my rear lights arrive from Japan! Can’t wait.

 

[Adey]

looks awesome man, when the twingo is back out ill pop over for catchup

 

[Mark Davis]

Yeah pop over, you planning on hitting up any car shows or caffeine & machine type events ? Let me know if you do.

 

[Mark Davis]

Over 650 miles done now, I was supposed to be getting the car tuned this Friday but I’ve been let down which is a shame, hopefully next weekend now.

I gave it a wash today and then following these pics a quick polish. I’m going to get the wings and bumper repainted in the winter and then PPF’d as already have too many stone chips for my liking. Should of done this after paint originally.

 

[Mark Davis]

I went to get the car tuned yesterday.

The good news is it made 520whp/600 ish at fly at 22psi, slightly frustrating news is we were running out of injector to run much more boost to get closer to the goal of 600whp.

Sadly we hit a bit of a problem on the last run - going to need to pull engine to investigate.

 

[Adey]

Good power but engine out again......?

 

[Duncan Grier]

As Adey said great to see some strong numbers but my heart sank when I read engine out again

Hope nothing serious

 

[Mark Davis]

Yeah, will feedback when it’s out.

Going to upgrade fuel system - may opt for flex fuel route and use E85 on occasion.