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Advanced Member ![]() ![]() Group: Advanced Members Posts: 297 Joined: 14-February 04 Member No.: 203 ![]() |
I intended to post this Thursday night but I figured I would put out a little teaser.
My car is going on the dyno Thursday for it's tune with the new setup. I'm geeked! I've been running a base tune that they put in last fall. Car feels very good/strong. Here's a few pics. (IMG:http://img.photobucket.com/albums/v294/Redbird1/engine/e1dc9395.jpg) (IMG:http://img.photobucket.com/albums/v294/Redbird1/engine/08a5ae20.jpg) (IMG:http://img.photobucket.com/albums/v294/Redbird1/engine/b9d73198.jpg) GMHTP had a 383 with ported stock heads put down (uncorrected) 448.5 at the crank. I have AFR190 street port. Not sure if this is better or worse than the ported stocks. Find out Thursday. My hope when I started this was 400 HP at the wheels. Wish me luck. Steve |
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Member ![]() Group: Advanced Members Posts: 144 Joined: 11-February 04 From: Hampton Roads, VA Member No.: 189 ![]() |
I too noticed the low torque. Just for comparison, my first 396 (years ago) with my hand port LT-4 heads, GM Hot cam, 1-5/8" shorty header through a restrictive exhaust, and a bone stock tune only made 363 rwhp but was still in the upper 390's rwt. I too had HP drop off problems at high rpm. I later switched to the Comp XE 244/234-114 and long tube headers and even with a stock tune I jumped to 385 rwhp and about 400 rwt. Then with a tune (not even using a wide band O2) it went to 403rwhp and 412 rwt.
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Lo-Fi Version | Time is now: 19th June 2025 - 07:14 AM |