harrop supercharger 408ci - 450rwhp!!!
#1
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hi guys plzzz help me
im really disappointed from my setup i got a cr8 chevy engine with harrop supercharge 11 psi with 408ci and prc heads stage 2.5 with kooks minifold and magna flow catback
the car is really kicks untill it reaches 4200 rpm then something holds it i tuned the car twice with 2 well known tuners and the same issue
first they told me the stock ls2 heads hold the power so i changed it and the same thing the power holds on 4200 so i dont think the heads are the problem
i checked the whole water piping and vacum everysingle thing
the same problem !!
check the dyno![](http://img204.imageshack.us/img204/939/img01504201010272006.jpg)
some tells me the supercharger belt is slipping and some says the supercharger is damaged but no sound of bearings and if its damaged the car wont run great and burn out untill 4200 rpm
the engine sounds good no sound and run smooth !!
The electric water pump is pumping fluid fine no leak !
the fuel is great both tuners said that !!
plzzzz help me guys !!! what do u think is the problem!!!
im really disappointed from my setup i got a cr8 chevy engine with harrop supercharge 11 psi with 408ci and prc heads stage 2.5 with kooks minifold and magna flow catback
the car is really kicks untill it reaches 4200 rpm then something holds it i tuned the car twice with 2 well known tuners and the same issue
first they told me the stock ls2 heads hold the power so i changed it and the same thing the power holds on 4200 so i dont think the heads are the problem
i checked the whole water piping and vacum everysingle thing
the same problem !!
check the dyno
![](http://img204.imageshack.us/img204/939/img01504201010272006.jpg)
some tells me the supercharger belt is slipping and some says the supercharger is damaged but no sound of bearings and if its damaged the car wont run great and burn out untill 4200 rpm
the engine sounds good no sound and run smooth !!
The electric water pump is pumping fluid fine no leak !
the fuel is great both tuners said that !!
plzzzz help me guys !!! what do u think is the problem!!!
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Last edited by corvette_uae1; 10-27-2010 at 09:04 PM.
#5
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jax ment he size and rib count of the belt and pulley from the crank. what injectors and fuel system are you running?
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umm how sure are you that you have a 408? if the tune is good, fuel is good, no slipping belt, valvetrain is fine, and heads are good i would say check to make sure you got a 408 dude. the 408 should have made more on motor.
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Zach
#10
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Which blower do you have? I know the later ones are TVS units. They make a 1900. Maybe a 2300 too. As mentioned above, if you're indeed having belt slip issues, the slip isn't coming from the pictured area. I'm assuming it's a front drive and those pictures are of the rear of the blower. Do you have a graph of the boost curve?
#16
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timing is good cuz we try to change it the same problem
catback is good i got magna flow catback !
8 rib belt on the car so no sliping !
im getting sick from my car !
i checked all the pipings the cooler and the vacum hoses !
dam im gonna sell this car
catback is good i got magna flow catback !
8 rib belt on the car so no sliping !
im getting sick from my car !
i checked all the pipings the cooler and the vacum hoses !
dam im gonna sell this car
#17
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Simple fix - just put a .050 shorter push rod in your motor. That will fix everything. Your lifter is working at the very bottom and is collapsing @ mid range. If you shorten the push rod .050 that would put your lifter back in the middle of the working mechanism and you will be just fine. Sorry you had the problem. When someone comes out with adjustable rockers, we won't have this problem to do all the measuring but believe me this will fix your problem. It's not valve springs or float or fuel or pump or anything else. Just do like I suggested and be happy and satisfied that you have your problem fixed. I'm just a 68 year old man trying to help as I was helped when I was young.
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#19
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Simple fix - just put a .050 shorter push rod in your motor. That will fix everything. Your lifter is working at the very bottom and is collapsing @ mid range. If you shorten the push rod .050 that would put your lifter back in the middle of the working mechanism and you will be just fine. Sorry you had the problem. When someone comes out with adjustable rockers, we won't have this problem to do all the measuring but believe me this will fix your problem. It's not valve springs or float or fuel or pump or anything else. Just do like I suggested and be happy and satisfied that you have your problem fixed. I'm just a 68 year old man trying to help as I was helped when I was young.
pm 2630
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#20