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The aero screen bug is hitting me. If you have one that you don’t need, let me know!

Hi thanks. I bought a 985 from SBD. And they are going to renew 9A4 with 9M4, which I may get later.

Sad to see you are selling the car… I am also in AZ. Btw do you consider selling the seats separately? Thanks.

Hello 7 owners, I am looking for a used MBE985 ECU communication module and/or a MBE 9A4 ECU unlocked. Please let me know if you got anything! Thanks!

Yes. I have done autox many times but found I am more of a track guy clearly. 😁

This was my experience when registering my 7. I actually didn’t need to transfer the original title to my name, which is a bit different from your experience. Anyways welcome to the club! There are a few other 7s that run track days with Porsche club. Would be fun to get together sometime!

It’s a detour of the thread. But today I drive my Miata track/race car after I drove my 7 on track last time… I never thought my Miata was not balanced until now…

Thanks guys! I did have a lot of fun and got to know some other caterham owners. Yes, during street driving the fan and temp behaves just like you said, turning on at 105 and then temp goes down. The part I don't like that much is on track, the car is going to or a bit above 105 since I would think on track, fan is not the major source for cooling. At least that's what usually how my track Miata do. But agreed, maybe it's just how the different cars cool. Btw, my car has dry sump and oil cooler. Sadly no ac though😂

Hello guys, here i come again... I did a track day with my 420 duratec the week before and I am so happy with how the car performed! Super fun and sliding around But I do have a question: in the afternoon (ambient temp ~70-75F), my coolant temp slowly creeped up to ~105C range at the end of the session. In the morning, no issue at all the car can do whole session at 100C. I am running zetec coolant (yes, not water since my 7 is more of a street car). Is it normal that the cooling cannot keep up at this low ambient temp? Any improvement I can do? BTW, here is a video from my track day!

If I remember correctly, from my experience with dji, it will try to follow until it thinks it lost the object and then will start hovering around…

Yep. I found a dynojet As long as it's safe, I am fine at least for now, I am not too worried about powerrrrrrrrrrrrrr...

Update changed the spark plugs and went to a dynojet shop for dyno. This time numbers seems much reasonable. 160 who 130 wtq. But the shop is concerned about AFR seems to be very lean at lower rpm. Do you guys see the same? I see @SK400has similar AFR but that’s on roller barrel. Ideas? Thanks.

Plan to change spark plugs and redo a dyno on a dynojet with AFR. Any other idea on starting point for troubleshooting? The issue here is I don't have any shop who is familiar with Caterhams...

Hello @sf4018, thanks for the information! I am wondering if the dyno is the reason. Will try with some other type of dynos. Thanks!

May I know what kind of Dyno did you use? I am thinking to use another Dyno to verify now... Thanks.

Thanks @Croc. 20-30% loss seems high but I get your point. Yes, cylinders seems fine to me also. Plan to swap spark plugs. They were original Ford plugs and plan to change to br7efs. thanks @SK400. My car has the 5 speed transmission and bmw LSD. I was also wondering about the peak power rpm but except an online crank Dyno curve, I didn't see any other Dyno plot so not sure... Don't tell me Caterham may have the wrong cam in the car🤣

Hi 7 owners. I did a Dyno run today for my 420s. Got 141 whp and 120 wtq. Seems low to me although I cannot find any other Dyno online. Wondering if it sounds normal. Car runs fine except in winter, cold start is tricky. For Dyno, it was a dynopack Dyno and the pulls were done in 4th gear. Diff ratio seems to be set to 3.98 although I don't know if it matters. If troubleshoot, where do you suggest to start? Did a compression test on a semi cooled engine. Cylinder 1-4 have 215, 210, 220, 215 psi. No idea a normal value for 420 duratec though. Thanks!

Update: the brake does lock up if I press hard enough using R888Rs. So I may be just not familiar with cars without brake booster. And I can notice, with a bit temp the brake grabs significantly harder. So maybe the pads are kinda race pads.

Oh. Mustang turns. Just need some crowds as bait.

Thanks. I haven't brought the cat on track yet so not sure about how the brakes perform when hot. But all the observation I had was on street and i used almost no brakes on street so I would say they are very cold... And actually I am not sure what pads are in the car right now... Will test with pads warmed up more and get back.

Thank you for your advice! I guess I need more experiments then. I did notice when brake warms up, it grabs better. But I can hardly get them warm on street...

Hi there, I have had my 420s for a few months now. One thing I am not sure is brake. It just does not give me the feeling that I am used to have in other cars. Maybe I am not used to non-boosted brakes? My car is 420s w/ standard brake MC and 4 piston calipers w/ original pads (good condition). I flushed the brake fluid with new ones recently but the pedal feeling before and after is the same. And I check there is no leak A few questions: 1. Sometimes, when I hard brake, the rev goes up. I think I didn't accidentally press the gas pedal... Anything can cause this? To my understanding, our cars have non-boosted brake, so the booster, rev thing is not here? 2. For normal brake, it feels fine and actually, we don't need to brake too much in these cars... But to brake hard, I really need to press the pedal really really hard, and it never locks up. Although I never got the pads to high temp and I am on Toyo R888r. Is this normal? I am in AZ and I don't know any other 7 owners... So hard to find another one to try out... 3. From what I understand, upgraded MC won't help on this and it will make the pedal even harder to press? Any suggestion? Thanks in advance!

Had an early morning drive last week and took some pic for my car.

I actually have this mirror coming with my car. But I am never used to it.

I always find some driving without side mirrors on the highway is a bit of sketchy... after looking the fancy solution from EU, i decide to figure out an easier way by myself. Bought some quality motorcycle chrome mirrors and tap the windscreen mid hole into M10x1.25 thread. Here we go! I am pretty happy about the solution and it is completely reversible since the bolt goes to the mid hole doesn't use that threa d on stand at all!