SR8 questions

Author
Discussion

parsonsj

Original Poster:

49 posts

97 months

Saturday 5th November 2016
quotequote all
I have some newbie questions about my 2007 SR8 (chassis #42)

My SR8 is an 07 model with the RPB -- is the engine start procedure the same as the 2006 model? (I have found a 2006 Owner's Manual.)

My brake line plumbing is entirely flex lines (as opposed to mostly hard lines with flex lines only for accommodating chassis movement). Is that normal?

I see a connector inside the left front wheel well. Anybody know what it is?

Any help would be appreciated, thanks!

jp


MK3 Dan

273 posts

152 months

Saturday 5th November 2016
quotequote all
Yes, the starting procedure should be the same. Plug your laptop in if you can.

Being an RPB it is 2.8L engine.

There is no manual for the newer cars unfortunately.

Not sure on brake lines but there could be a good chance that you just have braided lines throughout.

The left front wheel connecter I guess is a 3 pin? That's for a wheel speed sensor.

parsonsj

Original Poster:

49 posts

97 months

Sunday 6th November 2016
quotequote all
Thanks much for the response.

You're right: the brake lines are braided flex lines (Goodridge, I think). I've not seen that done on a whole car before.

Bummer on no manual. I'm lost on basic things, like where are the batteries? I want to put an externally accessible battery connector so I can keep them charged in the pits, and also while the car is in storage. The car also seems to have a video data recorder tucked under the bodywork on the right side of the car.

The connector in the wheel well has 12 pins... No idea what it might be.


MK3 Dan

273 posts

152 months

Sunday 6th November 2016
quotequote all
No problems at all.

Yeah, more I think about it, a all the cars up to the latest ones are on braided lines throughout.

Its a bit of a pain, the SR3 would give you a could idea of most things.

Make sure you do get a charger on the battery. It should be left front of the engine bay as you stand at the back of the car. Should be under a a small cover. Make sure you keep an eye on battery voltage and charging, the alternators do give a bit of a problem.

On that note make sure you get a LIFE download lead and software so that you can download the ECU data and insect it (temps, pressures, volts etc) after each outing.

The video will be AIM I guess, this will download and allow you to watch video with RPM/Speed over lay. Uses GPS for track maps.

Sounds like that plug will be for the light loom then, which your car may not have.

Racingroj

488 posts

170 months

Monday 7th November 2016
quotequote all
Hi John
Haveing just bought a new Radical here in the UK I have been told all the latest manuals, including the SR8 are available from the Radical website under downloads and mechanics manuals.
Roj

parsonsj

Original Poster:

49 posts

97 months

Monday 14th November 2016
quotequote all
Yes, it seems the connector was for the front lights. I pulled the front bodywork off and found the front light harness was tucked up inside.

So that's one mystery solved. I also found a connector for charging the battery under the left side belt-line.

Here's another question: I found a connector



It's not connected to anything, and the label says "CAM". There's also a connector on the back of the left head that isn't connected to anything. Anybody know anything about this? The engine runs...

thanks!

MK3 Dan

273 posts

152 months

Tuesday 15th November 2016
quotequote all
OK, so that plug is for your cam sensor.

The cam sensor is the sensor in the right of the pic with nothing connected to it.

Radical do offer an adaptor to go between the two.

Not massively important and your engine will run in 360, not the normal 720, with it. This means it batch fires the injectors so will use more fuel. Other than that not really a huge difference.

You will see the 360 running as one of the channels in the engine data.

parsonsj

Original Poster:

49 posts

97 months

Thursday 17th November 2016
quotequote all
Thanks Dan!

I called Jesse at Spring Mountain Racing (nee Radical West), and he said could cobble together some connectors for me to connect the cam sensor to the harness.

I understand the notion of 720 vs 360 and the role the cam sensor plays. I'm wondering if I'll need an upgraded engine map / strategy / tune if I connect it.


MK3 Dan

273 posts

152 months

Thursday 17th November 2016
quotequote all
No problems.

Jesse is your man and I'm sure will help you out!

No it's fine, the mapping is programmed to run 720 and should convert automatically when it sees the cam sensor. You would be able to double check this using the PT Mon program.

parsonsj

Original Poster:

49 posts

97 months

Saturday 19th November 2016
quotequote all
Ok, here's my next question: what kind of battery does the car have? I think I've got a 12v setup, but is it lithium-ion? AGM? lead-acid? What would be the battery that Radical would have put in the car?

thanks!

MK3 Dan

273 posts

152 months

Saturday 19th November 2016
quotequote all
I'm not 100% but I think AGM.

Fairly sure that's what odessey batteries are!

parsonsj

Original Poster:

49 posts

97 months

Saturday 26th November 2016
quotequote all
Thanks again, and here's my next question smile :

How can I access the front of the engine? Can one pull the seats and firewall to get to there?

thanks!

John

MK3 Dan

273 posts

152 months

Saturday 26th November 2016
quotequote all
No, no way through from the bulkhead/seats.

What do you need to get to it for?

For things like the alternator the best bet is to get the under tray off, the car on stands and go from underneath.

parsonsj

Original Poster:

49 posts

97 months

Sunday 27th November 2016
quotequote all
Hi Dan,

I've discovered that the ECU isn't seeing oil pressure. All the engine logs show 0 pressure, while the dash logs show oil pressure right about where it should be. So I'm trying to figure out what's going on, and get my eyes on the oil pressure senders, which I think are upfront on the scavenge pumps.

parsonsj

Original Poster:

49 posts

97 months

Sunday 27th November 2016
quotequote all
I think this is the oil pressure sensor, and it's connected to the dash. The black unconnected lead (with a label of "OIL PRESS") isn't connected to anything.


parsonsj

Original Poster:

49 posts

97 months

Monday 28th November 2016
quotequote all
That sensor is for the MXL dash, and I need another sensor for the ECU.

Seems like the Radical sensor looks a lot like a VDO 10 bar sensor. Anybody know if that's actually the case?

parsonsj

Original Poster:

49 posts

97 months

Sunday 4th December 2016
quotequote all
I disconnected the sensor from the dash, and connected the sensor to the ECU. Voila! Oil pressure is seen by the ECU, and at about the same numbers. I've got a VDO 360-004 sensor on its way -- it's the same 10-180 ohm range sensor, but with a normal ground (earth), rather than the floating ground as used by the pictured VDO 360-430.

Once I have both sensors connected I'll be able to compare the numbers and see if there's any significant differences. And if all goes well I'll be able to upgrade to later tunes that use low oil pressure trips to help safeguard the engine.


BertBert

19,703 posts

218 months

Sunday 4th December 2016
quotequote all
I think I've lost there oil two or three times over the years through failures and been very pleased about the cutout system - well done RPE!

MK3 Dan

273 posts

152 months

Wednesday 28th December 2016
quotequote all
Did you get it all sorted?

The vdo sensors are not the most reliable and the newer euro style ones are better, but I think it's a loom mod for you.

Most of the newer cars run one sensor that data streams to the dash, so I can only guess your aim was installed a later date.


parsonsj

Original Poster:

49 posts

97 months

Wednesday 28th December 2016
quotequote all
Yes, thanks for the follow up: the oil pressure is sorted. I removed one of the NPT plugs and put the VDO sensor in its place and connected it to the ECU loom. While I was there I bolted the Radical oil pressure manifold to the chassis (it was just zip-tied to the negative battery cable before).

Now I have dual oil pressure sensors -- one feeding the AIM system, and one feeding the ECU. A quick test showed both within reasonable range to the other. I need to run the car a bit to gather some running data to compare them directly.

I'll do that once I get the rest of the wiring sorted. The radiator fan was direct connected -- no switch, no fuse, no relay. I'm also adding an AIM memory key and a GPS sensor to the data gathering kit. It's coming together now. I'm wondering if I can make the US Radical event at Sebring in a couple of weeks.