3.2 Dyno Day at Weltmeister Silverstone NOW MOVED to 20th August

[Guest]

ORIGINAL: Steve Murley

Hi Richard B
The car does have a bit of lumpy idle, but I have always put that down to something else effecting it that I have'nt been able to find, its bit jerky on a light throttle as well, it needs setting up properly really. My car had large diameter headers on when I got it, but they were rusty and I needed some heat last winter, so changed to the early 73-74 style heat exchangers, not very big diameter tubing, I did'nt notice any performance differences but I am sure they're restrictive. 250 to 260 sounds nice. 46mm PMO carbs sounds good as well, trouble is the wallet is
restrictive just like my exhaust
Sorry, what do you mean by AFR's,
I have read about your car on this and other forums, sounds pretty good, shame about valve seals, do you know what caused the problem and has it all been put back together now. Who will you used to do the re-mapping.



Cheers
Steve

The high lift cams onmine pinched the seals between the guides and the caps apparently. JAZ are not very happy with the machinist who did the heads. The fix is to machine 2mm off the guides - which is done now. I should pick up the car tomorrow.

I think the idle will be your cams. Mine has to idle at 1,000+rpms otherwise it throbs and hunts and burbles away. The SSIs are a good street/track day header. They make great torque and only hurt the real top-end power by a little bit. You probably only give away about 5hp, which is less than most everyone can feel.

AFRs are the air-fuel ratio and would have been on a separate sheet to the dyno plot. Alan couldn't get mine last time as the twin out mufflers make it difficult to get sufficient flow over the probe. I would need it to be screwed into the O2 sensor bung next time. I plan to get the dyno work done at Weltmeister probably though Parr are much closer to me (but more expensive). The chip is going to be done by a secret source and if that doesn't work then I can send the AFRs to Steve Wong and he will burn me a chip. I was going to use Wayne Schofield but he struggled to agree a date to come to London - despite the commitment of 4 cars and a days work.

46mm PMOs are the "cheap" option as you can use the Motronic to control spark and timing and PMOs for fuel - so its almost a bolt-on. ITBs from Jenvey or others require scrapping the Motronic and buying Motec/Haltech/DTI or other engine management - so you are £1500 for the ITBs, £1500+ for ECU plus installation plus dyno set-up. Absolute minimum when I talked to Wayne a year ago is £3000 + VAT but I figured it was more 4-5k - ouch and double ouch for maybe another 20-30hp.

RB

 

[Steve Murley]

Richard B.
I thought AFR might be that, Weltmeister said it was a bit rich at the top end, 5500rpm, it use to rev to 7000 rpm when I got it but I have changed the rotor arm to a lower cut-off rpm. a bit chicken really !!. I really need to get 4 wheel alignment done next as I have fiddled around with the suspension and put 17" wheels on it. car likes left hand bends but doesn't like right handers. Is this the AFR graph attached below. Will your car be up and running or do you have to put it back together.
Cheers
Steve

 

[Guest]

No, its together. I just spoke to Mr Vic Cohen - who happened to answer the phone at JAZ and I think maybe lives at JAZ - who reports the engine is in and its all done. I shall pick it up tomorrow afternoon.

That looks like your AFR and that's all you need to send Steve Wong to get a chip burnt. He will have a few other questions but that's about it.

Alignment AND corner balance is well worth the money. In my experience, race shops are best for this work because they are used to doing it quickly. Though I try not to remember traumatic incidents, I think my first corner balance and align ran to close to £1000 whereas JAZ now get it done for a couple of hundred.

 

[ClubSport 911]

That's a very interesting car you have! With all the engine work, I would think you have a lot of hp still on the table.

Yes, you are right. One CS on the register has a 3.4 set up similar to yours and is making ~ 260hp. Having seen your AFR's I suspect there is a lot on the table w.r.t. mixture (you are running rich as per usual).

Are you running Optimax Steve ?

S

 

[ClubSport 911]

made 243 and a bit with a euro engine running 993 Supercup cams, SSIs and low restriction muffler

Definately meat on that particular bone eh RB ? []

 

[Guest]

I would like to think so []

Picking it up this afternoon.

 

[IanHighfield]

Popped out to the car last night and of course find that access to the DME appears to need me to remove the seat !

Do I just remove the four (or is it six ?) bolts holding the runners in and lift it out ?

When I get to the box, do I just open up and that's it ?

Finally, is Steve Wong and 911Chips one and the same ? If not, what address is SW, as I have read your articles about him and the CS on Pelican and would happily send over my Weltmeister Dyno print for a chip (assuming mine is standard). Any idea on BHP with it ?

 

[Steve Murley]

Steve D,
I usually put Optimax in it, unless I can't find it wherever I am, then I put ordinary unleaded in, somebody at R24 club night last night was telling me about a high octane esso petrol, 99ron from garage near Bedford,
said his car ran really well on it.

Steve

 

[Beaky]

I believe Steve Wong and 911Chips are one in the same, if you search on his web site there is a guide as to how to remove your DME

 

[ClubSport 911]

Don't forget the "Petrol evening" I'm arranging for Region 10 soon...

Details are here if you are interested.

Steve

 

[IanHighfield]

See my post here re: my chip number.

Advise from Sirish, Steve, Richard etc. appreciated.

 

[ClubSport 911]

Hi there Ian

I have posted, and hope this helps

KR's

S

 

[IanHighfield]

SP,

Given that my 240bhp came from a standard engine plus s/s silencer, it would seem to have added 10bhp !

SW offers chips for this, so would assume the s/s sports exhaust does add something, but no idea if the chip is affected.

I will send off data as SD suggested and see what SW says.

 

[IanHighfield]

Shirish,

I too had a reply from SW as I asked how much a custom chip would be. He needs my AFR to do it properly, but has offered to burn one based on 'average AFR'. My dyno sheet only shows BHP and Torque.

I rang Alan at Weltmeister and he has the files on their computer. Quoted the Reg No. and he will print and post me the file (not Windows format so cannot e-mail) - great service.

I will send to SW to get the custom chip done.

Will re-dyno after new chip and post results.

If we can get 12+ of us, then Alan is happy to do another Porsche Saturday, so might be useful for all you guys thinking of getting new chips and goodies after the first successful days.

 

[Guest]

Since attending I have also ordered a chip from Steve Wong, would also be interested in seeing the difference it has made so would be up for another dyno day at Weltmeister so count me in. It is worth check that the accelerator is fully opening the the throtte body and activating the full throttle microswitch.

 

[ClubSport 911]

Good news - like the idea of "3.2 day Ver 2.0"

I have some more work on the chip...and (wait for it) a bunch of work to start with exhausts now

I'd be happy to organise again when we get critical mass.

Shall we shoot for mid october ?

Steve

 

[Beaky]

I have just ordered my chip from Steve, will be picking it up next week whilst I'm in the US on biz.

I'd also like to join in the next dyno test at Weltmeister but unfortunately will be away again between the 5th to 21st Oct, any chance it could be accommodated in the last week of October?

 

[IanHighfield]

Steve,

I left a message for Alan at Weltmeister this morning, as he wanted me to remind him to post my AFR print to me. I also asked him how much notice he required for another Saturday dyno day, and suggested mid/end October.

Any idea how long it will take SW to make my custom chip and get it to the UK ?

I then need Sat/Sun to install and I will then be up for another dyno day, so count me in.

 

[Guest]

I think it will be in your hands in under a week most likely.

 

[Beaky]

Folks, in the event that your chips don't arrive, you can ask Steve to send them to my hotel address in Houston, he know where.

I have already alerted the hotel to expect several packages for me that may arrive even before I get there, which is from this Sunday through to Friday morning.