hey so i have this car im doin a cheap ebay turbo kit on .. .its a 50 trim .. so my question is this ....

the car is a stock 2000 OHV
1. the wastegate is external has a 7lb spring in it .. how do i drop the boost to like 3-5 .. do i have to change the spring?? cause its a ebay wastegate i dunno if i can get a diff spring.. the reason i wanna drop the boost is cause the car is completely stock and i dont want the owner blowing it up b4 he can upgrade the motor .i currently have the external wastegate hooked up bottom port of wastegate to turbo vac like a normal one i was told i didnt need to use the upper port ? is that right ,,

also i have a ebay boost controller with a Tvalve can i use it to lower the boost or only up the boost??

i know he needs a fuel pressure regulator and a flash on his comp.. do u guys know where i can send it to get flashed????

here is a pic of the set up this is not a updated pic exhaust is done and everything is buttoned up .. its runs fine just when it gets into boost it likes to choke.


Uploaded with ImageShack.us


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what did you do for fuel injectors/tuning to make the ecu understand that more air is being put into the engine?

jju ggg wrote:hey so i have this car im doin a cheap ebay turbo kit on .. .its a 50 trim .. so my question is this ....

the car is a stock 2000 OHV
1. the wastegate is external has a 7lb spring in it .. how do i drop the boost to like 3-5 .. do i have to change the spring?? yes, you have to change the spring cause its a ebay wastegate i dunno if i can get a diff spring you should be able to get one.. the reason i wanna drop the boost is cause the car is completely stock and i dont want the owner blowing it up b4 he can upgrade the motor .i currently have the external wastegate hooked up bottom port of wastegate to turbo vac like a normal one i was told i didnt need to use the upper port ? is that right ,, yes, bottom port only

also i have a ebay boost controller with a Tvalve can i use it to lower the boost or only up the boost?? yes. up only, not down

i know he needs a fuel pressure regulator and a flash on his comp.. do u guys know where i can send it to get flashed???? your best bet is to tune via hp tuners



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Most people will HATE HATE HATE the fact you have an ebay kit, but just be safe and enjoy!

i havent done anything to the comp .. im lookin for somewhere i can send it to flash the ECU..++ its not my car so all the haters can sit and turn.. lol

Wagonwes wrote:
Most people will HATE HATE HATE the fact you have an ebay kit, but just be safe and enjoy!

And the fact the OP has not filled out profile/registry....... No info = no help...





P&P Tuning
420.5whp / 359.8wtq

what can i do about the eCu? can i just take it to the The DYNO shop here in socal .. and they can flash it ?? or do i need it flashed then they can tune it??? or can i just use a chip type tuner??

the stock motor with a proper tune will be able to handle 7 psi boost so i wount worry about that. the best tuning option would be hp tuners. see if you can find a domestic tuner shop. if they can tune gm vehicles then they most likely have hp tuners. another option is an extra injector controller. whatever you decide avoid the @!#$ty fmu"s that some people use.

sorry i just created this account this is the first time i did a cavalier .. lol i will post updates tho .. and time slips and i have a vid also

yea i live in san diego i can take it to www.thedynoshop.com in santee there supposed to be the best in san diego next to JBA. so they should be able to tune it ?

JOE L wrote: the stock motor with a proper tune will be able to handle 7 psi boost so i wount worry about that. the best tuning option would be hp tuners. see if you can find a domestic tuner shop. if they can tune gm vehicles then they most likely have hp tuners. another option is an extra injector controller. whatever you decide avoid the @!#$ty fmu"s that some people use.

The bold text above is false..... I don't know where you came up with this 7 psi number, but depending on the fuel mods, size of the turbo, and the tune, much more can be achieved. PSI is thrown around this place too loosely... Also, FMU's are not always a bad thing. They are not the best, but they do in fact work.








P&P Tuning
420.5whp / 359.8wtq

BEGI/Cartech FMU FTW!!!!!

And do we really need to have an ebay turbo kit thread every week??? When will people learn..





"You can only feed them semen for so long before their legs fall off."

QWK LN2 (aka ImPhat0260) wrote:

JOE L wrote: the stock motor with a proper tune will be able to handle 7 psi boost so i wount worry about that. the best tuning option would be hp tuners. see if you can find a domestic tuner shop. if they can tune gm vehicles then they most likely have hp tuners. another option is an extra injector controller. whatever you decide avoid the @!#$ty fmu"s that some people use.

The bold text above is false..... I don't know where you came up with this 7 psi number, but depending on the fuel mods, size of the turbo, and the tune, much more can be achieved. PSI is thrown around this place too loosely... Also, FMU's are not always a bad thing. They are not the best, but they do in fact work.

first of all he mentioned he had a 7psi wastegate spring and he wanted to lower the spring rate to lower the boost. i was clearly stating that the stock motor can handle 7 lbs of tuned boost as many people have done it. i boosted my stock 98 s10 2.2 for years with 8 lbs of boost. as for fmu's there the cheap @!#$ty way of boosting. they dont keep afr's at a specific number. they essentially just dump fuel exponentially into the engine under boost which is not the way to tune a vehicle. an fmu is not a tune. if you think it is then you need to look up the word tune. exponentially dumping fuel into an engine will lose power, risk cylinder washout and raise the fuel line pressure to dangerous levels. your more than welcome to put that @!#$ty fmu on your vehicle but dont recommend other people to use it.

JOE L wrote:

QWK LN2 (aka ImPhat0260) wrote:

JOE L wrote: the stock motor with a proper tune will be able to handle 7 psi boost so i wount worry about that. the best tuning option would be hp tuners. see if you can find a domestic tuner shop. if they can tune gm vehicles then they most likely have hp tuners. another option is an extra injector controller. whatever you decide avoid the @!#$ty fmu"s that some people use.

The bold text above is false..... I don't know where you came up with this 7 psi number, but depending on the fuel mods, size of the turbo, and the tune, much more can be achieved. PSI is thrown around this place too loosely... Also, FMU's are not always a bad thing. They are not the best, but they do in fact work.

first of all he mentioned he had a 7psi wastegate spring and he wanted to lower the spring rate to lower the boost. i was clearly stating that the stock motor can handle 7 lbs of tuned boost as many people have done it. i boosted my stock 98 s10 2.2 for years with 8 lbs of boost. as for fmu's there the cheap @!#$ty way of boosting. they dont keep afr's at a specific number. they essentially just dump fuel exponentially into the engine under boost which is not the way to tune a vehicle. an fmu is not a tune. if you think it is then you need to look up the word tune. exponentially dumping fuel into an engine will lose power, risk cylinder washout and raise the fuel line pressure to dangerous levels. your more than welcome to put that @!#$ty fmu on your vehicle but dont recommend other people to use it.

You apparently don't know how to read. I never once said that an FMU is a "tune"... I said and I quote, "Also, FMU's are not always a bad thing. They are not the best, but they do in fact work.." .. Maybe you need to be more clear on what you type because based on what you wrote, 7psi is all the engine can take... Also, if an FMU is setup properly, it will not cause you to lose power and or risk cylinder washout... Maybe you just don't know how set one up properly, I dunno?!?!? BTW, if you want my professional opinion (which BTW, I am a professional in this industry, are you?) I generally advise against using FMUs. In some cases they will be needeed, in most they are not. Here is some more food for thought.... Before the Jbody had HPT support, what you think the hundreds of boosted Jbodies were using for fuel support... An FMU!

Still wanna try to school the teacher son?






P&P Tuning
420.5whp / 359.8wtq

Doesn keep your AFR's at a constant number??!?!? Mine stays damn near perfect! 11.5-12.0 in WOT boost... True though, it's far from perfect, but if you're running a small turbo setup and dont have the money for tuning, this would be your best bet.





"You can only feed them semen for so long before their legs fall off."

JOE L wrote:
first of all he mentioned he had a 7psi wastegate spring and he wanted to lower the spring rate to lower the boost. i was clearly stating that the stock motor can handle 7 lbs of tuned boost as many people have done it. i boosted my stock 98 s10 2.2 for years with 8 lbs of boost.

Generally speaking, 7psi might be just fine... but 7psi on one turbo, is not the same as 7 psi on another turbo unless they have the same flow/trim/sizing/etc... The bigger the turbo, the less psi you have to run with it, to create the same power that you would with a smaller turbo.




Edited 2 time(s). Last edited Wednesday, April 28, 2010 12:15 PM