My supercharger!

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Jan 4, 2004 | 07:19 PM

superdutymike27

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My supercharger!

My question to anyone out there is about my superharger. I have a 2001 Ford (of course) F-350 Superduty. It has a 5.4 V8. This truck really moves, I mean it really goes. The problem that I'm having is that when I go to really punch the gas, the tach screams up to 6,000 rpm's and seems to hang their until I let off the gas. I really have'nt kept it their for the fear of blowing something up. It does this at city speeds or freeway speeds. I had the tranny checked at a local dealer and the say it's fine. I do run a Diablo chip and it has been burned to match the blower I have in my truck. Maybe if I hung the throttle out thier a little longer it would kick in, but like I said earlier, I don't want to blow anything up. If tried to talk to other people about this, but no responses. Is anyone out their that can help? Thank you!

Jan 4, 2004 | 11:19 PM

billycsx-t

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It could be a number of things, it is probably the overall design of the engine setup. The supercharger, cam, intake, mass air, exhaust, ignition and just plain overall flow of the engine probably isn't setup for over 6000 rpm. The engine is choked at higher rpm due to its higher airflow demand.

Jan 5, 2004 | 03:14 AM

superdutymike27

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Thanks Billy for your reply. What if I went with a larger throttle body rather than my stock one? Do you know how I could find out my comp. ratio? I was figuring if that I don't have enough that could be the problem.

Jan 5, 2004 | 12:16 PM

billycsx-t

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I bigger thottle body couldn't hurt, probably give you 10-20 horsepower. Forced induction engines like lower compression ratios to reduce detionation. Your truck probably has 8.5:1 compression ratio which works out well superchargers, compresion probably isn't the reason its doing that.

Jan 5, 2004 | 12:34 PM

Blurry94

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From: Calhoun GA

The program within the chip probably has the shift points set a little high...6000 rpm on any 5.4 can't be good without forged internals.

Jan 5, 2004 | 05:37 PM

fauxexplorer

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From: peekskill'ny

i find with my 30" street tires the shifts are lower than with my 28" drag radials.just give it a quick lift and stab when you want it to shift.just needs the tire height parameter reset of shift point change.both will lower it.
good luck

Jan 6, 2004 | 06:53 AM

superdutymike27

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Thanks explorer for your reply. I have 38" tires on my truck. I can still smoke the tires, probably nothing compared to your 30". I had this chip in my truck before I installed the blower and it worked fine in the shift points. After the blower install, I sent the chip back to Ken at Motorhaven with all the info he needed to correct the chip. I took the chip out a few weeks ago and cleaned the contact points thinking this may help. But it did'nt. I'm really running out of ideas about correcting my problem. I think I will send the chip back and have Ken reburn it.