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Discussion Starter #41
Fuel consumption

An unexpected benefit of drilling the extra holes is an improvement in fuel consumption. T drove to Rich Hanning's place this morning, 200 mile round trip, mainly interstate at 75 - 80 mph with a little urban and rural driving on either end plus Rich test drove the car on his favorite back roads. I filled up the tank when I got home and it did 247 miles on 9.9 gallons = 25 mpg. I think that it did 22 - 23 when I did the round trip to Al Mitchell's place for the dyno testing.
 

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An unexpected benefit of drilling the extra holes is an improvement in fuel consumption. T drove to Rich Hanning's place this morning, 200 mile round trip, mainly interstate at 75 - 80 mph with a little urban and rural driving on either end plus Rich test drove the car on his favorite back roads. I filled up the tank when I got home and it did 247 miles on 9.9 gallons = 25 mpg. I think that it did 22 - 23 when I did the round trip to Al Mitchell's place for the dyno testing.
I checked my notes and your 190 hp engine is getting the same highway mileage as the '78 Spider with an unconfirmed 150-160 hp.

I last drove Ed's Spider four years ago, before he installed the 45 DCOEs and the new head and pistons. It was so good I was skeptical when he decided to pursue more power. I am now a believer. From 2800-3000 rpm, the engine pulls harder, longer than the old one and it doesn't seem like it is working very hard in the process. It just goes. And stops. The bigger front brakes are noticeably stronger than the stock brakes on my '78 and I doubt the difference is just pad material.
 

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Discussion Starter #43
Two Spiders

Rich took the picture at his place yesterday. I drove his green 78 and he drove my red 79. His motor has the head and pistons from my previous motor and the same cams but with different carbs and headers. His car is a little smoother below 3000 rpm with it's smaller venturis and it has has good power but doesn't quite pin your ears back the way that the red car does.
 

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Discussion Starter #44
The 25 mpg on the drive to Rich's was not a fluke. I drove to Road Atlanta this weekend to crew for Richard Jemison. It is about 220 miles each way of mainly interstate at 75 - 80 mph. I gassed up on the way home with 259 miles on the trip odometer and it took 10.1 gallons.
Richard took it for a test drive after his races on Saturday and had a lot of fun in it but not as much as finishing second in the Sunday afternoon feature race in his Duetto after swapping the lead a few times.
 

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Richard Jemison
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I had the chance to drive the Spider in the infield roads at Road Atlanta. The roads have been repaved, and simulate mountanious elevation and turns, as well as the skidpad. The car`s drivability and torque/HP is not unsililar to my race cars considering the weight!
This is the best developed Alfa street car I`ve ever driven!
 

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Discussion Starter #46
I did not realize that the car would pull such G force until I sat in the passenger seat with Richard at the wheel. I had to brace myself with my elbow and shoulder against the door on the skid pad.
 

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Discussion Starter #47
While this thread is primarily about my engine build and performance here is a quick description of the handling setup. It has evolved over several years and don't see much more change in the future given the way it rides, handles and brakes. When I offered the test ride to Richard I both wanted him share some satisfaction in the performance since he was a major contributor to it and I also wanted his feedback on the handling as I don't have a good frame of reference beyond some brief rides in competition cars. His feedback was that he would not change anything so here it is.
The wheels are 15" Rotas which are pretty light for 15's.
Tires are Continental Extreme Contact Sport 205/50 ZR15, 32 psi front & 28 psi rear.
Springs are Shankle Super Sport about 600 lb/in front & 150 lb/in rear.
It has RJ dropped spindle uprights from an earlier model with Milano caliper bolt centers.
Front sway bar is stock, Rear sway has been removed.
Front shocks are SPAX adjustables and rears are Koni yellows. The SPAX have a very wide range of adjustment, with 14 clicks and they are set at #11. The Konis are set half way. I started out softer on both pairs and gradually increased them until they controlled the spring return over large fast bumps.
The sway bar links have rubber bushings and all other rubber bushings have been replaced with Performatek poly.
Front toe in is 1/16" and camber is 1 degree negative. I have not measured the castor.
I used a 27mm front sway bar for a few years before returning to stock which has improved the handling, particularly on bumpy roads.
The rear brakes are stock except for a steel braided flex hose. Front calipers are Aluminum Brembos from a Milano which are lighter than the iron Ate's, also with steel braided hoses. Pads are plain organic.
 
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