rgp6373 Posted August 19, 2006 Report Share Posted August 19, 2006 i have 4th gear wot on my truck but when i hit about 4500rpm i loose all boost and i cant hear the blower whine . any ideas what this could be or even happend to anyone else . it was happening before i rebuilt the engine Quote Link to comment Share on other sites More sharing options...
punkt71 Posted August 19, 2006 Report Share Posted August 19, 2006 i have 4th gear wot on my truck but when i hit about 4500rpm i loose all boost and i cant hear the blower whine . any ideas what this could be or even happend to anyone else . it was happening before i rebuilt the engine <{POST_SNAPBACK}> Sounds like you hit your speed limiter around 105-108 or so... happened to me too... I need to get it removed ASAP .. lol. It threw me off too, because it doesnt misfire like a normal speed governor, it just closes the throttle plate or something... Quote Link to comment Share on other sites More sharing options...
.justin. Posted August 19, 2006 Report Share Posted August 19, 2006 i have 4th gear wot on my truck but when i hit about 4500rpm i loose all boost and i cant hear the blower whine . any ideas what this could be or even happend to anyone else . it was happening before i rebuilt the engine <{POST_SNAPBACK}> Perhaps punkt71 is on the right track... but 4500 in 4th gear is 140-145mph not 105-108 Quote Link to comment Share on other sites More sharing options...
punkt71 Posted August 19, 2006 Report Share Posted August 19, 2006 hahah I was thinking 3rd gear for some reason... yeah there must be a speed limiter set at 140 or so. .... why the hell are you going 140+ in a 5300lb truck anyways??? Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted August 20, 2006 Author Report Share Posted August 20, 2006 cause i can . but i have never heard of anyone else hitting a secondary limiter and our trucks dont even have 4th gear wot until you program them guess i will call westers see if he knows Quote Link to comment Share on other sites More sharing options...
zippy Posted August 21, 2006 Report Share Posted August 21, 2006 It deffinitly sounds like the speed limiter on the ETC side. The pcm is closing the throttle blade from the sounds of things which is just going to kill all boost and take away the sound. Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted August 21, 2006 Author Report Share Posted August 21, 2006 thats what i thought but why would it be there GM has no reason to put it there and my truck is still pulling hard when it happens . hopfully westers has an answer cause that srt 10 needs a beating Quote Link to comment Share on other sites More sharing options...
.justin. Posted August 21, 2006 Report Share Posted August 21, 2006 thats what i thought but why would it be there GM has no reason to put it there and my truck is still pulling hard when it happens . hopfully westers has an answer cause that srt 10 needs a beating <{POST_SNAPBACK}> It's not a GM thing, that would be a tune thing. I'll bet that Westers has you limited to that speed. Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted August 21, 2006 Author Report Share Posted August 21, 2006 hmm have to fix that then Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted August 22, 2006 Author Report Share Posted August 22, 2006 well i talked with westers he says its not a computer problem . bothe lyndon and davenport suggested that my by pass was opening under the high load at that speed . it does have some adjustment so i will try that tonight if not maybe a different spring . am i the only radix to go this fast ? i am only makin about 7.5 lbs of boost there are people on here that are running more than that with a radix . Quote Link to comment Share on other sites More sharing options...
zippy Posted August 22, 2006 Report Share Posted August 22, 2006 I've been to well over 130 in a Radix'd truck without that problem. Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted August 22, 2006 Author Report Share Posted August 22, 2006 i tried sliding the bypass valve back on its mounts this didnt do anything . should i try another spring ? someone said that 4400rpm in 4th was 140mph or so, this is the only time this happens and no one seems to know why . has anyone with a radix pulled over 5000rpm in 4th gear ? there has to be an answer to this Quote Link to comment Share on other sites More sharing options...
BenKey Posted August 23, 2006 Report Share Posted August 23, 2006 My guess is you're the only knucklehead trying to hit 4500rpm in 4th, so you may be own your own for a fix Quote Link to comment Share on other sites More sharing options...
punkt71 Posted August 23, 2006 Report Share Posted August 23, 2006 Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted August 23, 2006 Author Report Share Posted August 23, 2006 actually i would like to pull 6000rpm in 4th , 4500rpm is just where it stops right now Quote Link to comment Share on other sites More sharing options...
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