New 331 dyno #'s poor!! Help!!

tmoss · 06-28-2005, 07:53 AM

Although the parts may not be optimum, they don't "suck" and I agree you should be making more power. Did you degree the cam in? Did you check for proper pushrod length/rocker tip travel? The little things can make a BIG difference.

Blaster · 06-28-2005, 09:41 AM

The short block was built by a reputable builder who has been in business for quite awhile, but I have not done a compression test yet and I highly doubt compression is low but I will check anyways. I believe he said 10.4 to 1 with my alum. heads. My valve train is exactly the same as it was with the last setup (stock rockers), my timing is at 14 degrees. I also run the same premium fuel I always have. My cam was installed stright up, and my valve train was set up with proper clearances. My exact dyno numbers are 267.7rwhp@5500 and 291.1tq@4000rpm

06-28-2005, 07:53 AM	#1
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: New 331 dyno #'s poor!! Help!! Although the parts may not be optimum, they don't "suck" and I agree you should be making more power. Did you degree the cam in? Did you check for proper pushrod length/rocker tip travel? The little things can make a BIG difference. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

06-28-2005, 09:41 AM	#2
Blaster Registered Member Join Date: Mar 1999 Location: Canada Posts: 66	Re: New 331 dyno #'s poor!! Help!! The short block was built by a reputable builder who has been in business for quite awhile, but I have not done a compression test yet and I highly doubt compression is low but I will check anyways. I believe he said 10.4 to 1 with my alum. heads. My valve train is exactly the same as it was with the last setup (stock rockers), my timing is at 14 degrees. I also run the same premium fuel I always have. My cam was installed stright up, and my valve train was set up with proper clearances. My exact dyno numbers are 267.7rwhp@5500 and 291.1tq@4000rpm

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