DRR Sportsman
| OP did not mention what fuel it burns, so I assume gas. My 468 with big domes liked 40* best on race gas, not a lot of diff from 38* though, like .01-.02 quicker, maybe 0.5-1 MPH faster, so I went with the safer 38 in case of fuel quality variances, etc. On methanol, it likes 36* best. Tested at 2* increments, from 32-40.
Dan "Jim" Moore
Much too young to feel this damn old!!
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| | | Posts: 1102 | Location: Farmersville, TX | Registered: December 05, 2002 | 
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DRR S/Pro
| quote: Originally posted by R.BOLDEN:
I purchased a race car with a 489 BBC, I checked the timing and its on 40 degrees. I was just wondering if anyone else runs that much timing. This car ran consistent and done well. The motor has a 2927 intake,1050 dominator with 2"spacer,aluminum pro comp heads that have been worked,dome arp pistons,722/722 lunati roller cam,and I was told they had to move the cam around to get valve to piston clearance and that it had a lot of compression.this is in a 3100# plus car that runs 1/8 mile with a powerglide and 488 gear
Assuming the pointer is correct for that motor with open chambered heads and a decent domed piston 38 to 42 is common. |
| | | Posts: 2163 | Location: Tewksbury, MA,USA | Registered: November 03, 2000 |
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