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<blockquote data-quote="bat-stang" data-source="post: 3896012" data-attributes="member: 39895"><p>My heads are the stock GT40's with a valve job, Bullet 77maf and 65mm throttlebody. My computer is a non-cobra specific '92 processor. Talking to (the now defunct) owner of South Houston Motorsports (the builder of my car), his response to the A9L is that the difference is a slight change in the ignition curve, and something else (can't remember, sorry)--very minor differences, in his opinion. Very persuaded, in his experience, that the A9L doesn't cure this particular problem. I only have the bucking on cracked throttle, but non existent during vigorous driving, and only at 1700 rpm. It's more like a slight stumble than a full on buck--unless I begin to pull from that rpm, then it clears pretty quickly. I think that #2771 hit it with the lean condition/timing curve. It's really a non issue with me--if something IS actually wrong of course I'm concerned; however, if this is notorious, it's part of the package. This car has been built with a bit higher rpm range in mind, and I do notice a slight loss of torque down low compared to my bolt on 88 Gt, but it's made up for in mid range to top end performance. Would I rather better low end response? Maybe in certain situations, but for me this is actually a small price to pay for a real 290-300 hp at the wheels. My ride comes alive (noticeably) at about 3300 rpm--I mean almost like a carb car after its throat has been cleared--and runs like a scalded dog to its 6800 rpm redline.</p><p></p><p>With my tune I was warned against the 70--let alone the 75 throttlebody. My car is mild compared to yours though: was told that my off the line would suffer.</p></blockquote><p></p>
[QUOTE="bat-stang, post: 3896012, member: 39895"] My heads are the stock GT40's with a valve job, Bullet 77maf and 65mm throttlebody. My computer is a non-cobra specific '92 processor. Talking to (the now defunct) owner of South Houston Motorsports (the builder of my car), his response to the A9L is that the difference is a slight change in the ignition curve, and something else (can't remember, sorry)--very minor differences, in his opinion. Very persuaded, in his experience, that the A9L doesn't cure this particular problem. I only have the bucking on cracked throttle, but non existent during vigorous driving, and only at 1700 rpm. It's more like a slight stumble than a full on buck--unless I begin to pull from that rpm, then it clears pretty quickly. I think that #2771 hit it with the lean condition/timing curve. It's really a non issue with me--if something IS actually wrong of course I'm concerned; however, if this is notorious, it's part of the package. This car has been built with a bit higher rpm range in mind, and I do notice a slight loss of torque down low compared to my bolt on 88 Gt, but it's made up for in mid range to top end performance. Would I rather better low end response? Maybe in certain situations, but for me this is actually a small price to pay for a real 290-300 hp at the wheels. My ride comes alive (noticeably) at about 3300 rpm--I mean almost like a carb car after its throat has been cleared--and runs like a scalded dog to its 6800 rpm redline. With my tune I was warned against the 70--let alone the 75 throttlebody. My car is mild compared to yours though: was told that my off the line would suffer. [/QUOTE]
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