boost launches

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syty9933

New member
everytime i boost launch it builds boost strong until i hit about 7 psi and no matter how much more throttle i give it it dosent move( sometimes it drops a lil), and results in a decent launch, but not the best. any ideas
 
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syty9933

New member
Re: boost launches

i dont hear it knocking and its not just the boost that wont go up, its the revs too, when you launch shouldnt it chirp a lil bit because mine dosent at all
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: boost launches

If you having tach flutter issues (99.9% of time ignition) The last thing you should doing is a boosted launches or WOT runs.
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: boost launches

syty9933 said:
i dont hear it knocking
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If you hear it knock their is a good chance you have blown up your motor if its stock long block. You need a scan tool to look at you knock sensor to see if it picking up knock counts and retarding the timing. Relying on your ear is like jumping off a cliff to figure out if you going to fall. Either way it will be too late by the time you figure it out.
 
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syty9933

New member
Re: boost launches

Sy#2661 said:
If you having tach flutter issues (99.9% of time ignition) The last thing you should doing is a boosted launches or WOT runs.
Click to expand...

i fixed the flutter with a cap and rotor before i did any launches

Sy#2661 said:
If you hear it knock their is a good chance you have blown up your motor if its stock long block. You need a scan tool to look at you knock sensor to see if it picking up knock counts and retarding the timing. Relying on your ear is like jumping off a cliff to figure out if you going to fall. Either way it will be too late by the time you figure it out.
Click to expand...

i use datamaster when i can, so if ive heard it knock before then its already blown most likley? because its been having wierd problems for the last several months. I think i have blow by because of oil in my pcv valve system and a gas/oil smell in th cab. it seems like it runs ok, but missing the full muscle when getting on it
 
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syty9933

New member
Re: boost launches

bezerk said:
do a tune up, but 7psi seems right on a stock stall
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i did a tune up, but i think ive covered all the bases and it is still knocking and missing performance. im pretty sure its blown, ill do a compression check soon to verify
 
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