turbo surge????????? - Ford Powerstroke Diesel Forum
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Old 08-02-2007, 09:51 AM
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turbo surge?????????

Hey guys, I have a 99 7.3 how do you know if its a99.5 or 99 mine was MFD 2/99 so im guessing is a 99.5 badges on door and such. yesterday i was on the Freeway i had the edge attitude on setting 4 and i was prob dooin 65 maybe 70 up a slight hill nothin huge and everything sounded fine i rolled into the throttle and i could hear the DIY tymar start to suck air i was prob around 2000 maybe alitle more and it got loud (normal) and then it went psss ppss pssss psss. i wasnt payin attention to my monitor to see if the boost fluctuated or any thing i was at like 750 850 on the EGT. Im sure it was turbo surge. i just backed out of er and lowered the setting to 3 and didnt happen again. sound familar? (i wasn't towin anything) the sound wasnt bad my GF didnt even notice but i did and you couldnt feel it just here it. i just put the intake on so im sure its happend before i just couldnt hear it. the reason i asked bout the 99.5 is i heard the 99s arnt suposed to surge, maybe wrong but thanks for the help guys
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Old 08-02-2007, 09:55 AM
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replace the turbo intake side housing and problem gone , ats makes housing
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Old 08-02-2007, 09:56 AM
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Sounds like some wastgate flutter,which is common with that application.Changing the impellar wheel will likely solve the isssue.

Last edited by harald@bd; 08-02-2007 at 09:57 AM. Reason: spelling
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Old 08-02-2007, 10:07 AM
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harald so you dont think it was surge? throw a wicked wheel in there and i should be good. I never really beat on er i just like everything to be right, i heard that the WW will just raise the point at witch surge happens? I could unplug the WG and would that help? thanks
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Old 08-02-2007, 10:13 AM
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Yes , if you wire the wastegate closed the flutter will also go away,BUT, this is not the recommended fix.you could overspeed the tubo with this setup and damage it,
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Old 08-02-2007, 10:16 AM
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Yea i hear ya, i do have a boost gauge and i never see above 25, probable cause i have a wastegate lol not sure what im gonna do.Wicked wheel probably. I dont think its gonna be a prob as it only did it when i was on level 4 and at high speeds
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Old 08-02-2007, 10:26 AM
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Quote:
Originally Posted by harald@bd View Post
Yes , if you wire the wastegate closed the flutter will also go away,BUT, this is not the recommended fix.you could overspeed the tubo with this setup and damage it,
What a load... a "tech " telling you that unhooking the wastegate will stop surge... Go back to school my friend...

A WW might stop or move the surge a little, but the ATS housing will stop it dead...

It is not "wastegate flutter", it is surge...

Overspeed the turbo huh.... LOL Might over BOOST it, but not over speed it...
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Old 08-02-2007, 10:31 AM
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CSI lol. I thought so, how much the ats housing, the wheel is lkie 80 bones so i might start there but then again i heard that the wheels are harder to put it. Can you feel surge? as i felt nothing just heard it. but also i was not at WOT i might try it on the Freeway today just to narrow it down
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Old 08-02-2007, 11:31 AM
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Quote:
Originally Posted by Blackpearl View Post
CSI lol. I thought so, how much the ats housing, the wheel is lkie 80 bones so i might start there but then again i heard that the wheels are harder to put it. Can you feel surge? as i felt nothing just heard it. but also i was not at WOT i might try it on the Freeway today just to narrow it down

Your not going to feel it at WOT... only when just rolling into it, about 12-15# boost... In bad case's you can feel it, I know with my GTP-38r and the 1.00 housing it would shake the truck just before it stalled out!!!

Try the WW... If it doesnt work your only out $80... Its not that bad of an install...
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Old 08-02-2007, 01:57 PM
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thanks csi, appriciate it where you think the best place to get a WW would be?? thats what im gonna do! And at lunch today i jumped on the freeway and let er eat on level 3 and it did not do it, it only did it on level 4,5 so i think the added HP is what did it. if that dont fix it il go to ATS
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