|
|
Post by thruxton on May 8, 2022 18:36:28 GMT
Hi Howard.
So have you just screwed the new ARB’s on in the first/standard hole or something else?
And did you do both ARB’s at the same time?
Regards.
Rich.
|
|
|
|
Post by howardb66 on May 9, 2022 11:20:23 GMT
Hi Howard. So have you just screwed the new ARB’s on in the first/standard hole or something else? And did you do both ARB’s at the same time? Regards. Rich. Hello Rich Yes, both F&R at the same time. I rang up Bofi & asked for their advice. Front on softer of the 2 settings & the rear was middle of the 3 settings. The reason for this is that I have pretty high spring rates. The handling was pretty much as before, just a load more grip. I was really genuinely surprised what a massive difference it made to the times. |
|
|
|
Post by atlex on May 9, 2022 11:22:46 GMT
How's it feel on the road now, btw ?
|
|
|
|
Post by howardb66 on May 9, 2022 14:57:06 GMT
How's it feel on the road now, btw ? Better than ever! To be honest I was expecting it to tramline & be harsh but it just feels a little more taught. The handling is still the same with progressive breakaway & a slight oversteer bias. I’m going to let my brother have a go in a few days & see if he wants to fit them to his standard MK2.5- it’s got MeisterRs though. |
|
|
|
Post by howardb66 on Jul 18, 2022 10:21:17 GMT
Had a big day on the car yesterday with Zed.. Finished my medical treatment 3 weeks ago & decided I was well enough to give it a try.. So I’ve been struggling with traction when on the limit through corners as the wave of power is enough to spin the unloaded inside wheel which in turn bleeds boost. It’s time to upgrade the diff. Zed. very generously offered his assistance as I’m still not fully recovered by any means (plus he has the skills that I lack!), the Kaaz was delivered a few weeks early from Bofi to him. Rich then over a few days built it in to a ‘pigs head’ with a new bearing set.  The big day came & I drove down to Zed.’s workshop & aided by various cooling drinks through the day, we got it fitted. Only a little of Zed..s welding skills were required as all the ABS sensor bolts were corroded into the hubs…….  Several hours later (in the hottest day I’ve ever experienced in Wales), it was time for a break in drive. Off we went to a suitable industrial estate & spent some time driving in figure 8s. All good , Then a steady cruise home. This week a spinner check & oil change then am good to go for Castle Combe this weekend 🙂 |
|
|
|
Post by Zed. on Jul 18, 2022 16:11:02 GMT
It's a good thing you took some photo's...... as I forgot  you've one less excuse now  Rich. |
|
gbuk
Chats A Bit
Posts: 130 
|
Post by gbuk on Jul 19, 2022 17:59:18 GMT
This week a spinner check & oil change then am good to go for Castle Combe this weekend 🙂 I'll be looking out for you. I'll be one of the Orange army - and they're still looking for volunteers if anyone else fancies a bit of flag waving |
|
|
|
Post by howardb66 on Aug 13, 2022 7:52:08 GMT
Interesting morning yesterday. Went to try a rolling road for the Classic Marques championship. After lot of faffing about a power run was done. The guy also put an AFR probe up the exhaust ‘just to see’ what the map was like. After the run, he said that the car should have had melted pistons as the map was so far out of tune ( lean). I explained that it’s been running like that for 21/2 years & he said I’ve been lucky, also according to his print out my limiter comes in at 6750 rpm… He then tried to sell me a new ECU….. I’m really skeptical & am going to take the car to another RR… The top line is crank power & the bottom is AFR.  |
|
|
|
Post by atlex on Aug 13, 2022 9:21:01 GMT
I'm not convinced by that either.
Tail pipe AFR readings aren't as accurate as wideband readings further up towards the motor. Especially when the engine is changing conditions. They're perfectly fine for a constant idle or accelerated CO/Lambda test though.
Also, he may have got the engine speed / wheel speed compensation wrong, unless you really do have the limiter that low (doubt it, hillclimb hero!).
If you're concerned, you don't actually need to to get to a dyno, just run your ecu in logging mode and do a pull once warmed up and share the log with us.
Megalogviewer can be configured to show the same (ish) graph for AFR over the rpm range. Specifically want to see TPS%/MAP/AFR/RPM and CLT/ECT so we are sure it's up to temp.
A tuning session would involve getting that WOT AFR line to be much flatter. You kind if want it all following somewhere between 12.4 and 12.6 to the end of the rev range. It'd take a 3-4 pulls and some manipulation of the fuel table between each pull.
|
|
|
|
Post by howardb66 on Aug 13, 2022 10:37:28 GMT
I'm not convinced by that either. Tail pipe AFR readings aren't as accurate as wideband readings further up towards the motor. Especially when the engine is changing conditions. They're perfectly fine for a constant idle or accelerated CO/Lambda test though. Also, he may have got the engine speed / wheel speed compensation wrong, unless you really do have the limiter that low (doubt it, hillclimb hero!). If you're concerned, you don't actually need to to get to a dyno, just run your ecu in logging mode and do a pull once warmed up and share the log with us. Megalogviewer can be configured to show the same (ish) graph for AFR over the rpm range. Specifically want to see TPS%/MAP/AFR/RPM and CLT/ECT so we are sure it's up to temp. A tuning session would involve getting that WOT AFR line to be much flatter. You kind if want it all following somewhere between 12.4 and 12.6 to the end of the rev range. It'd take a 3-4 pulls and some manipulation of the fuel table between each pull. Thanks, I thought it was to Coxswain. My limiter is set for 7200 rpm & has been for 5 years, so am sure that the wheel/engine speed compensator factor is wrong. The thing is we have to have a dyno power read out for our championship (power to weight). |
|
|
|
Post by howardb66 on Sept 9, 2022 14:55:23 GMT
Had the geo checked & adjusted at Northampton Motorsport. The NSF had lost a bit of camber when I went off a few months ago, plus they added more rake to try & combat the mid corner oversteer that I’ve been getting.  |
|
|
|
Post by howardb66 on Sept 28, 2022 14:33:40 GMT
Did a gearbox swap as my current one is getting really noisy, especially as all sorts of metallic residue came out with the oil when I changed it a few weeks ago. Also a finecut short shifter went on.
The box took a little bedding in as I’d fitted a new nylon shifter bush.
|
|
|
|
Post by howardb66 on Oct 7, 2022 7:41:35 GMT
So then folks, have been trying to work out what causes the dip in the power delivery at about 4700 RPM. There’s a sudden change in the AFR at this rpm. I was wondering if it was VVT related?
I’ve changed the plugs & crank angle sensor. Got another cam sensor arriving tomorrow hopefully.
Thoughts anyone?
|
|
|
|
Post by atlex on Oct 7, 2022 8:40:54 GMT
So then folks, have been trying to work out what causes the dip in the power delivery at about 4700 RPM. There’s a sudden change in the AFR at this rpm. I was wondering if it was VVT related? I’ve changed the plugs & crank angle sensor. Got another cam sensor arriving tomorrow hopefully. Thoughts anyone? Depends on when the VVT kicks in. I've had experience with this on the K20, - you can nail your fueling perfectly but you can't map out the momentary lean spot when VTEC starts. You can sort of prepare the map for it though, so if you give a bit more or less fuel in the cell you're primarily in just before the blip. Got some Logs ? |
|
|
|
Post by Zed. on Oct 7, 2022 9:05:43 GMT
dip in the power delivery at about 4700 RPM. There’s a sudden change in the AFR at this rpm. I was wondering if it was VVT related?easy test, unplug the vvt solenoid & testdrive  Disclaimer, if it goes t its-up etc.  Rich. |
|
le sigh