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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