11.3 with some traction issues....wonder how long the motor will last. Enjoy!

http://www.svtperformance.com/forums...d.php?t=235997

 

this is a repost #1 an #2 if it has a good tunner then it will last for ever if it has a bad tunner then a couple runs

 

damnnnn!!! that kb rocks

 

It will do fine with a good A/F ratio and if the motor is kept under the factory rev limit. Almost every supercharger company is showing dyno numbers in the 6400-6750 range, these motors are toast at that RPM even in N/A form.

 

Nice, but a little slow for 11psi. Here is what a single turbo (67mm) with 11psi can do on a hot September day. 10.65 @ 131mph on the factory long block.

http://169stang.2005stang.com/powerhouse0510.67.mpg

 

i thought x psi with a SC vs the same psi with a turbo wasn't the same. i don't think you can compare the two

 

could you provide the link for the original post? i search through these forums a lot and never saw the video for this car. saw the show, not the video. second, there is already one guy on here that had a safe tune running around 9 psi i think. he blew his motor. so your theory doesn't hold water...sorry

 

There are two previous threads in the Drag Racing Forum (where this thread may end up too):

http://forums.bradbarnett.net/index.php?showtopic=39496

http://forums.bradbarnett.net/index.php?showtopic=39470

 

IMHO, I don't think you can compare equivalent psi ratings even between different superchargers, let alone turbos. A car running 10psi on a twin screw SC will perform differently than a car running 10psi on a centrifugal SC.

 

That is my point exactly. dhof303 posted that is was slow for 11psi. he was comparing a SC to a turbo.

 

Yep.. I agreed with you; just expanded a little.

 

Turbos are more efficient, therfore you are correct. That's why I like turbos, but they are slightly more costly.

 

that's what i figured, just wanted to make sure

 

MMR 68mm Turbo kit $4999.99 Release date 12-2004
KB Twin screw $Probably over 5K, Release date originally 01-05 then 02-05 then 05-05 then 08-05 then 10-05 now? Still waiting.

I know comparing psi between different forced induction methods is different, and yes turbos usually cost more, but not always. We originally wanted a supercharger, a KB, until being lied to by the company and then badmouthed on the internet by the owner. A supercharger is a great mod, but at boost levels needed to run those times there will be some serious repair and maintenance in the future. If you aim to race then maybe this is a good choice. If you drive your car on the street, I would suggest a SC a little more conservative/less costly/better support, or get a turbo.

 

MMR's kit sounds pretty good, but personally I'd want to somewhat upgrade it, which would raise the price. Are you planning on running a Electronic Boost controler in your car? Does the kit come with a BB turbo? I have been eyeing the Hahn Racecraft 05' twin turbo system. They are local and are well known in the turbo scene.

 

max200jp: I don't want to totally hijack the thread, just my 0.02 toward KB so PM me and I can give you specifics.

donw: Hey, I am coming out to San Diego from Dec 26th through Jan 2nd and my wife and I want to stop by some good speed shops, do you know of any besides JBA?
Thanks,
Derek

 

JBA Racing is the only one here I have visited personally... they did a good job on my rear gears, but I wasn't impressed with their dyno abilities. I also have heard mixed reactions about DPR (some good, some not so good), but have no first hand knowledge myself. rrobello has dealt with them I believe.

 

I don't think you can make the case that these motors won't handle 9lbs of boost. If you are talking about the 9lb Procharger car that recently croaked, the car was running pretty poor numbers for a supercharged car with a custom tune. You need to know more about the tune to say it was safe (and in this case it doesn't sound like a good tune or a safe tune).
Second, the RPMs must be kept under control. The big lie right now is "500hp @ 6750rpm" with the new XYZ supercharger. The engine will not handle those RPM, the valvetrain cannot do it, even if the rotating assembly can. You trash the motor revving it that high for any period of time. The factroy rpm limiter is not an arbitrary number. The only supercharger company I've talked to over the last few months that even has come clean about this tidbit is Whipple. Whipple makes the power without upping the RPM limiter, and if you build the motor later, you can rev it higher at that point. 522hp with the 10lb kit under 6100rpm. I have this kit on order, but it looks like January for delivery. One engineer at a supercharger company told me that the engine had a 3 minute lifespan over 6400rpm, and Whipple said that they are running their chargers for 100 hours straight with no failure because the the dealer will carry the kit in the SVO stores.

 

Finally, a supercharger that has some respect from me. I knew that Ford favored the Whipple and it does make good, reliable horsepower as seen on the Ford GT. Furthermore, it is not only the RPM that limits the engine's life, it does depend on the tune quite heavily in the 24 valve motor specifically because of the piston design being thin in the valve relief area. Whipple is a good choice IMO, likely to have Ford backing and warranty if left alone.

 

Closing....Repost.