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Turbo issues

7410 Views 55 Replies 15 Participants Last post by  Slingsteve
Hey guys, so I just installed the Alpha turbo and earlier today everything was running fine. Now, on my way home from work it won't hold boost past 4000rpm. It sputters and pops after 4000. My first thought is boost or vacuum leak. Any suggestions?
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Have them check the plugs and coils. Had same thing happen on my Evo when we cranked up the boost. Coils where weak, changed them then it was blowing out the spark. Had E2 plugs in it. Changed plugs all was good. It smelled like it was flooding all the time and was missing in 5th anytime you would try to accelerate. Just a thought good luck.
Funny you should mention that. Cause I'm at the store as we speak buying more copper plugs. I replace them every 2 weeks.
Are you using the plugs @RABTECH has been recommending? Been there with plugs on a different animal. Have them check the coils, shouldn't be bad this early but you never know. Also sounds like possible tune issue. I would ask or insist for a reflash if nothing mechanical turns up. Understand frustrating times. Things like this don't affect the masses just the few with great luck! Like myself. Just can't win the lottery. Good luck!
It would help all the gearheads on here if you can record a video and upload it to YouTube for us to see. I know it would help me to hear it idle and if you could let us hear it when its acting up going down the highway that would help. Have someone take a cell phone and ride with you and video it. It has to be something that can be corrected. If they made 25 kits yours would be like all 25. If they made 50 kits yours would be like all 50. Give us a video. I bet we can cipher it out for you. I don't care what brand it is. Your a Turbo owner and you need it fixed. Let us help u and give us a video to watch.
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I was thinking it is something that was already there and the turbo is exposing the weakness. Without hearing or seeing everything is only speculation. Is it possible a stuck injector could cause this? Just fishing now. Had that happen on my 6.0 deseil. Dropped cylinder but you new it, smoked like a freight train.
Without video and audio we can only take random stabs at a solution. Ill wait to see what he finds out from Funinthesun and then maybe he will post a video.
Are you using the plugs @RABTECH has been recommending? Been there with plugs on a different animal. Have them check the coils, shouldn't be bad this early but you never know. Also sounds like possible tune issue. I would ask or insist for a reflash if nothing mechanical turns up. Understand frustrating times. Things like this don't affect the masses just the few with great luck! Like myself. Just can't win the lottery. Good luck!
Using the copper plugs the manufacturer recommended. Change coils and all. If you can think it I did it. Even removed entire turbo and reinstalled.
Without video and audio we can only take random stabs at a solution. Ill wait to see what he finds out from Funinthesun and then maybe he will post a video.
I'm on vacation until Sunday and I left the bike with the mechanic who installed the turbo to go over his work for the 4th time. If no change I will up load a video .
Ill be on vacation tomorrow until Sunday . While I'm gone I am having the mechanic that installed the turbo do another through test and inspection for the 4th time to make sure his work is good. Call me on Monday.
will do. Have a great vacation
Using the copper plugs the manufacturer recommended. Change coils and all. If you can think it I did it. Even removed entire turbo and reinstalled.
They recommend using the NGK 4306 plugs and I believe (Rab can correct me if I'm wrong) a plug gap of .028
Hope you see this before you leave for vacation

EDITED: Note gap should be 035 and not the .028 I posted last night
My bike did the same thing early on when on the piggyback system. Changed the plug gap and it made a huge difference. Might want to look into that. Sorry your having issues @Moejoe
Plug received today, installed and everything is running beautifully. Tightened after a hot run and that sucker will not be going anywhere.
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4306 NGK with 35 thousandth gap.
Install without anti seize
Good day, all. I'd like to re-introduce myself. I am the gentleman named Bill Hahn Jr that's been mighty scarce on this forum as of late. I've missed you all, but due to substantial time challenges in business and personal spheres recently, I've not been able to stay as active on the forum as I'd like. Thankfully, this chaotic world is catching up with itself, and my self-imposed hiatus is about to end...but more on me somewhere else, as this thread is certainly about more pressing matters.

Also thankfully, some diligent friends of mine let me know there was work to be done here. I'm sorry I didn't get here any earlier guys, but thanks for the heads-up, and thanks many millions for helping out your fellow Slingshot enthusiasts in the meantime. You are pure gold, and Hahn RaceCraft is indeed fortunate to have such devoted believers.

I've contacted Mr. Solomon to offer what will be an intense salvo of support, as much as is conceivably possible remotely over the web and telephone, and I expect to speak to him today. I share his disappointment, and am still hopeful that whatever is dogging his installation can be found and corrected, thus finally allowing him to enjoy the fine results that dozens of others have achieved with our 2-bar SST TurboSystem.

At any time during this heightened process, we're about one phone call away from the machine vacationing here in Florida, for despite multiple efforts, a solution just does not appear to be forthcoming at its current location. All the same, we are relentless, and no Slingshot has defeated us yet. More to follow.


Boost Regards,
Bill Hahn Jr.
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Hey guys, so I just installed the Alpha turbo and earlier today everything was running fine. Now, on my way home from work it won't hold boost past 4000rpm. It sputters and pops after 4000. My first thought is boost or vacuum leak. Any suggestions?
I'm having a issue like this but mostly is warm weather when driving it hard slamming gears. Wot shift. I'll hit 3rd and it bogs and popping rpm sitting at 3500 with wot. Let off throttle and hit wot again it's fine. Can't seam to get anywhere with alpha on help. Cold engine it purrs but after driving it. Idle you hear popping from exhaust like a misfire and sometimes it will shake the entire slingshot like a old car that is cammed out. 3500 miles on the turbo I'm almost done with it. Thinking about taking it off.
Good day, all. I'd like to re-introduce myself. I am the gentleman named Bill Hahn Jr that's been mighty scarce on this forum as of late. I've missed you all, but due to substantial time challenges in business and personal spheres recently, I've not been able to stay as active on the forum as I'd like. Thankfully, this chaotic world is catching up with itself, and my self-imposed hiatus is about to end...but more on me somewhere else, as this thread is certainly about more pressing matters.

Also thankfully, some diligent friends of mine let me know there was work to be done here. I'm sorry I didn't get here any earlier guys, but thanks for the heads-up, and thanks many millions for helping out your fellow Slingshot enthusiasts in the meantime. You are pure gold, and Hahn RaceCraft is indeed fortunate to have such devoted believers.

I've contacted Mr. Solomon to offer what will be an intense salvo of support, as much as is conceivably possible remotely over the web and telephone, and I expect to speak to him today. I share his disappointment, and am still hopeful that whatever is dogging his installation can be found and corrected, thus finally allowing him to enjoy the fine results that dozens of others have achieved with our 2-bar SST TurboSystem.

At any time during this heightened process, we're about one phone call away from the machine vacationing here in Florida, for despite multiple efforts, a solution just does not appear to be forthcoming at its current location. All the same, we are relentless, and no Slingshot has defeated us yet. More to follow.


Boost Regards,
Bill Hahn Jr.
Do you do anything with the alpha kits? Having issues with mine. Had installed 2 months ago with 51 miles on my ss. I'm at 3500 miles now. Alpha not being much help
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