Boost Spike!
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Boost Spike!
Yesterday i installed my new Forge DV. I used the yellow spring. (was i supposed to put in the spacer??) Anyway now the car seems to spike really hard. It pins itself past 1.5 in 2nd gear. Now that scares me so i wont let it happen again but. Can some one tell me where to look to see what the problem is. The only thing i could think of was the vaccum lines to the wastegate or factory boost control selenoid . I know they do not have anything to do with the DV but i tought that maybe i pulled one out and the wastegate wasent oppening. I couldnt find anything wrong! The DV shouldn't have anything to do with boost control on throttle, i mean the only thing it could do is leak not cause spikes right! Please help im confused!!!
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it s very comon for the 05 to boost spike, i ahve the jdm mr DV and i spike to 24 psi once in a while, it s not a problem don worry about it, as long as the boost is not constant u wont hurt your car
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Originally Posted by GTKage
it s very comon for the 05 to boost spike, i ahve the jdm mr DV and i spike to 24 psi once in a while, it s not a problem don worry about it, as long as the boost is not constant u wont hurt your car
EMR8, I'd do a quick and easy test by re-installing the stock DV, then going out to check your boost again. If the problem persists, then you have an issue not related to the Forge DV that may have occurred during the installation process. If the problem goes away with the stock DV, then you will need to do some more research on what spring is proper and whether or not to use the spacer you referred to...
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i have no boost controller, bt i have observed boost spikes in my evo and friends evo ( all 05) goign up to 24psi ( maybe boost gauge inacurracy in high boost reading i dunno) in 3rd, 4th and 5th gear , the reason y it might go that high is because we all have TBE.
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Originally Posted by GTKage
i have no boost controller, bt i have observed boost spikes in my evo and friends evo ( all 05) goign up to 24psi ( maybe boost gauge inacurracy in high boost reading i dunno) in 3rd, 4th and 5th gear , the reason y it might go that high is because we all have TBE.
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Originally Posted by GTKage
even if it goes to 24 for less than half a second? and doesn t always do it it s only from a roll in the higher gears
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You Guys Rock! Thanx. I will try the factory one again and see. I had this prob on my STI but i didnt put a DV on besides the stock one. The fix for the suby was to port and polish the wastegate! But if it didnt do this proior to the DV im not sure how the DV is realted unless i did some thing wrong!
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Originally Posted by Warrtalon
As I said, I set my MBC so that it only spikes right at 1.5bar (21.75psi) or a little bit higher in 5th (22psi), but any higher than that and it knocks like crazy in the mid-range.
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Originally Posted by GTKage
weird i never experience any knock tho, i should hear it or feel it if the car was knocking no?
You're definitely knocking...people never know. They just add mods and think everything is cool without ever going to test it and see what's going on via dyno'ing or hitting the track.
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Originally Posted by GTKage
glad i am not the only one