Wastegate springs in Boost Designs kits.....BEWARE....everyone read

[D1 guy]

Sorry for posting this, but everyone should be aware of this. Everyone who has ordered a boostdesigns kit beware of the wastegate springs!!!!! I was told ( along with 2 other local people) that the kit i ordered would have an 8lb wastegate spring. This is apparently not true!!!!!! I detonated when a put the pedal down b/c the boost jumped up to 14 or 15psi. I got out of it quickly and luckily it didnt blow a headgasket or anything else for that matter. One of the other two guys i mentioned over boosted thinking that he had an 8lb spring and blew his motor. Now hes had to buy a new motor and is running NA until the blown motor is rebuilt. As for the other guy I mentioned, we told him to check his wastegate spring before he put it on and sure enough, It had a 14.7 (1 bar) spring in it. We probably saved him from a rebuild. Im writing this to tell everyone to be aware of this problem and to tell everyone who ordered a boostdesigns kit to check their springs. Boostdesigns has had more bashing than any company I know of on here, so I wont state my opinion. I hope this doesnt offend any of the moderators. This is a serious issue.

[DammitBobby]

I had a 1 bar spring as well. I was fortunate to ease into the throttle and watch my boost gauge go past 10psi. I was one of the first ones to buy his kit. When you are new to turbo`s you always think you did something wrong not that you have the wrong part. It pains me to see so many things going wrong with BD because I supported him.

[fiznat]

Jeez, the hits keep coming.

I changed the thread title just so that boost designs customers will be sure to visit the thread. Thanks for spreading the word D1 guy.

[scheffler]

ok i have not put on my kit yet but how how would i be able to tell the spring rate before i put in on is it colored like the tial springs?

[Jeff240sx]

The springs are colorcoded, however, they use some cheap Taiwanese gate, which may not go by Tial springrates.

However, I've been talking about this for a long time. It *may* not be the wastegate spring. I know my issues isn't/wasn't that.My old Tial 35 was 6.5psi solid on my RevHard manifold. Went to BD manifold, made 9-10psi. So thinking BD uses a 38mm gate, I bought a new Tial 38/40mm gate with 10psi spring. Well.. I let off the throttle at ~60% and 14psi. The manifold's wastegate design causes massive boost creep. I've been posting about this for 2-3 months.-Jeff

[DammitBobby]

The wastegate can come with 2 different size springs. You want the smaller green one, which is 8 psi. As far as boost creep I really have not run into that problem. Once I replaced the spring I had no more problems.

[nissanfanatic]

You can test spring pressure with an air compressor and an inline gauge. I found out my Turbonetics Evolution springs were labeled wrong.

I always do this now no matter what. Insurance is never money/time poorly spent.

[Jookmasta]

pics of the 1 bar spring would be good for this post d1......................

[D1 guy]

I should be able to get pics of it tomorrow. Its in a bin with my old supra wastegate springs and 2 of them look the same. Its one of them. I did test it and it was for sure a 14lb spring. I bought a $10 8lb spring off of ebay and fixed my problem....luckily. In my case, it was the spring. That may not be the case for everyone, but I know for sure that it was for me and 2 other people I know. Thanks

[HolyShiznit]

The wastegate design on the manifold shouldn't cause massive creep. I know on mine I had to smooth out the edges so it could actually flow correctly. But I don't see how it could cause boost creep unless the lines are different or the wastegate was functioning improperly.

Good info and great to see the community helping each other out through these dark times.

[Jeff240sx]

The wastegate design on the manifold shouldn't cause massive creep. I know on mine I had to smooth out the edges so it could actually flow correctly. But I don't see how it could cause boost creep unless the lines are different or the wastegate was functioning improperly.

Good info and great to see the community helping each other out through these dark times.

Well.. it's all about how fast the exhaust leaves the "collector" on the manifold.The piping to the wastegate from the manifold is long, and angled. Then, it heads towards the dp and hits it tangentially, at an 80-85* angle. Wrong angle, and you never want it to hit tangentially. So, if the piping can't dump the exhaust fast enough when the wastegate is open.. it just backs up and spools the turbo. Same thing would happen if you had a 3' long snorkel. When you exhale, by the time you tried to inhale, the CO2 wouldn't have left the snorkel tube, so you'd inhale what you just exhaled. If it's too long or too narrow.. or a crappy angle and creating massive backpressure at the wg to dp connection, the exhaust stacks up.-Jeff

[turtl631]

think it would work better dumped atmospherically?

[Jeff240sx]

think it would work better dumped atmospherically?

100% surely. However, that's harder to do on the BD setup.. because you have to plug the downpipe up. And some people like myself bought the BD kit solely because it reroutes the wastegate dump.-Jeff

[Jookmasta]

so does this mean that everyone has/is been experiencing boost creep issues when it is rerouted back to the DP?

[Jeff240sx]

so does this mean that everyone has/is been experiencing boost creep issues when it is rerouted back to the DP?

As a generality, rerouting costs a few horsepower, and exponentially increases the chance of creep. To reduce creep chance, you want a very narrow dp entry angle (10* or so) with a short, large diameter tube.-Jeff

[DRIFTEADOR]

that's why i'll be dumping to the atmosphere. love the sound too. i dont see any reason to reroute except for it being more emissions friendly. I doubt anyone's trying to save the ozone here

[Jeff240sx]

that's why i'll be dumping to the atmosphere. love the sound too. i dont see any reason to reroute except for it being more emissions friendly. I doubt anyone's trying to save the ozone here

When you can, why not? I installed a high flow cat in place of the fakie on my s14, and wanted a rerouted wg dump.It's one thing to change your oil and spill a few drops on the ground. It's another thing to finish the change and throw the oil in the local body of water (bay, canal, lake, ect). Needlessly polluting is fairly stupid. That's not saying I'm going to let emissions get in the way of my car's goal. Just.. if I can do something to make it more smog-legal or pollute less, I will.-Jeff

[DRIFTEADOR]

^ coming from the someone with no cat

the reason to reroute would wg dump is to let the catalityc converter do its job on the the dumped exhaust too instead of venting the harmful gasses to the atmosphere. with no cat, youre dumping everything to the atmosphere.

[Jeff240sx]

^ coming from the someone with no cat ... with no cat, youre dumping everything to the atmosphere.

I installed a high flow cat in place of the fakie on my s14

You sir, are an idiot. -Jeff

Modified by Jeff240sx at 4:24 PM 6/9/2005
Modified by Jeff240sx at 4:24 PM 6/9/2005

[nissanfanatic]

Well, cruising around, the wastegate isn't open. So unless you drive everywhere on full boost, no "harmful" gases are going into the atmosphere. NTM most proplerly tuned cars are very enviromentally safe.

[quote=""Jeff240sx"]Needlessly polluting is fairly stupid.[/quote]Exactly...

[DRIFTEADOR]

definitely sig worthy...

why dont you go ahead and edit your post a couple more times a-hole

[AZhitman]

Enough.

Back on topic.

plzkthxbye.

[the_momo]

i definitely had the same issue with my bd wastegate, that was actually the only bd product on my ka. i would hit 4500 ish and it would go near 14 psi, then my injector broke... it was a light green/teal color on the spring, awaiting a new 8lb from ebay and 480s to maybe fix it. DONT DONT DONT use the supplied spring in bd gates unless you want to run that much boost.