Quote:
Originally Posted by doswald
Cylinders bored 1 mm to 85 mm; JE pistons with a measured ratio of 9.4:1
Cams: Solex grind by Webcam
Ignition: MSD Streetfire; stock Marelli distributor, with points
Intake: Zenith 40 TIN carbs, with 32 mm venturies; 145 main jets; 170 air corrector jets; 55 idle jets; stock emulsion tubes and stock idle air bleeds; fuel pressure 3.5 lbs
Exhaust: SSI heat exchangers, with Bischoff muffler
Results, (see table below for the final run): Horsepower, 173.3 at 6300 rpm (compared to stock of 125 @ 5800 rpm; and stock S at 180 @ 6500 rpm); 155 ft lbs torque at 5300 rpm (compared to stock of 130 @ 4200; and stock S of 147 @ 5200). The torque figures are somewhat misleading because this engine pulled over 150 ft lbs from 4100 rpm all the way through 5800 rpm.
Thank you again for all of the help!"
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More questions:
1. Did you do any work to the t heads to take advantage of the mod solex/dc30 cam? John at Dougherty is recommending dc15-102 which he says has slightly more lift than an e. This was based on my aim of a street only car prioritising mid-range. He said DC30 wouldn't give benefit without opening up the heads a bit (hope I'm not misquoting/understanding him). I know he is expert, just trying to understand why so many people seem to run DC30 on stock heads.
2. What alloy did you go for with the JE pistons - I have read people on here saying using the 2618 pistons is not advised due to fact the piston will expand faster than the barrel, and advise 4032 alloy. JE seem to make 4032 pistons but only with 10:1 compression. Will this be too high for my intended platform (ie single plug)?
Thanks