TRD S/C problem

Hey guys,

My S/C finally was installed but the boost is way too low. I have the URD 2.825" pulley on it and the S/C was only producing 3-5 lbs of boost. I know I am at a high elevation but that is ridiculous. The shop tested the S/C with a smoke tester and there was no leaks internally. The by pass valve is also works.

What the hell is going wrong?

Thanks

 

How can fix that or test is?

Thanks for the input

 

What type of exhaust are you running? Lower backpressure means less boost but more HP. If you have long tubes headers, cat deletes and 3inch exhaust or bigger, you have very little back pressure. Combine that with high elevation you'll be low but that still seems very low. What is your elevation? How are you measuring your Boost? Have you Dyno'ed? I'm at 400ft above sea level and my S/C runs right on factory specs with short tubes all cats and banks exhaust. Need more data from you to make a diagnosis.

 

I have no exhaust mods. My elevation is 3438 ft above sea level. The truck was dyno'd before the S/C at 164 hp and after at 192. Something is definitely wrong. The boost was measured through a boost gauge.

Thanks for the input.

 

Do compression test. 164 whp on 1GR-FE is waaaay too low... Healthy 1GR-FE should be putting down around 190-200whp... Elevation has no effect on vehicles running positive pressure. N/A vehicle will experience loss of power due to thin air, In positive pressure vehicles air is forced into combustion chamber so there should be no or very minimal power loss.

 

It is all upon the dyno. Brokentusk ran a dyno on and he ran 174hp with a CAI, chip and exhaust (this was pre s/c)

 

What kind of dyno? Dyno can be calibrated wrong... Boost leak could make it show less psi than its set to... How many PSI in perfect world should the supercharger make with the URD pulley?

 

In a perfect world -> 7-8lbs of boost. I don't know what kind of dyno but my truck has only 40 000 KM which is like 25K miles and I never had any engine problems. The truck also went in BONE stock.... not even a CAI. Some dynos just give out different numbers. The main importance is the gain of HP... which in my case is weak as S***

 

All I can think of is boost leak or bad dyno, try different dyno?

 

bad dyno or good dyno the gain is still too small. It should be more of a gain than that. I think it is either a boost leak or the supercharger belt is slipping.

 

Yup would be my guess too...

 

Yah 192 seems SUPER low for a supercharged 1GR-FE... URD kit stage 3 says it should put you above 400... Any sounds when really romping on it?

 

I haven't drove it. Is has been in the shop for the past week.

 

Oh well i bet your just stoked to have a supercharger!!! Id love to be at stage 3 URD with my truck... Oh man id love to smoke my diesel buddy whos pushin 450 in his 2500 Dodge.