WTF is happening
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From: underground
Maybe not building enough boost from 2-step or launch? That might explain why you beat the car from a roll and can't trap higher now because your car might be taking longer to accelerate due to the fact it struggles to build boost compared to your old turbo from a dig... Tune your car to build more boost on 2-step. My guess, if I am wrong don't bite me 
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From: Orlando FL
Even with the stock manifold you should still trap more. The launch is your problem because if the FP was launching the car more aggressively then you would still trap higher because of traction. If you don't want to do a full tune once again then just tell your tuner to raise your 2-step a little more and see how that works out for you. I believe tuners can also do a couple of tricks to raise the overall boost build in two-step without raising the revs just changing the A/F. Do those and let us know.
hmmm you sure you dont have any leaks. Cuz i same thing happened when i swapped BOV;s. My ET's were the same but my MPH dropped from 123 to 116. Then i put my old BOV back on and i was back up to 123 with my greeen.
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From: underground
no..i still have the aps....i dont see how that would make a difference so much... i did a boost leak test and i have no leaks...plus wit my 8 turbo i was running 12.2 now i cant even pull off a 12.5
Could be the tune. We have identical mods except I run meth @ the same psi you do and we have different and I have 9. But still don't think me having a 9 will give me a 10mph jump over you. Either That or your driving at the track isn't all there ( not saying I'm a pro cause Im definately not). At what RPM are you shifting at? Also make sure your wastegate is tight mine had almost no tension and couldn't hold so much boost. Could your boost gauge be off and your really not running as much as you think. I was tuned using one of those GM 3 Bar sensors and the boost wasn't matching up with my gauge
Last edited by 400AtTheWheelz; Feb 4, 2009 at 04:01 AM.
so i went to the track tonite to see if i could hit some 11 second passes since i got the fp green and megan 02 housing, but i couldnt my trap speeds were lower than they were with my 8 turbo...with my 8 turbo on e85 on 30psi i ran a 12.2 at 116.8mph several times (stock 02 housing, stock ic, stock manifold)
my trap speeds with the green were ,109 and 110 111mph...i couldnt get it to any better.... and no i do not suck at driving..lol....
my 60fts were 1.7 - 1.8 (on 18s)
what can be causing this power loss...???
i recently got tuned on the green,megan 02 and xs engeering ic...
af ratio at wot are 11.6 no knock threw out the whole pull..... please help
spikes 30psi and holds 24psi to 7k solid
my trap speeds with the green were ,109 and 110 111mph...i couldnt get it to any better.... and no i do not suck at driving..lol....
my 60fts were 1.7 - 1.8 (on 18s)what can be causing this power loss...???
i recently got tuned on the green,megan 02 and xs engeering ic...
af ratio at wot are 11.6 no knock threw out the whole pull..... please help
spikes 30psi and holds 24psi to 7k solid
