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Unread 04-12-2011   #1 (permalink)
BC03 is offline Rookie


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Default High miles + adding a supercharger???

Hey guys, I'm new to the forum so any help or advice you guys can give I would greatly appreciate...Here is the deal..I just recently traded in my 04 V6 for an 03 GT (Yes! - finally a V8) with complete exterior (03/04) Cobra conversion kit (except the rear spoiler which i plan to get in the near future). I am from GA and I drove to Orlando to get it. When i saw it in sitting in the lot for the first time it was like love at first sight..lol...Thankfully I was able to get a good deal for it. I plan on doing some mods this summer to it when i can build my funds back up. The car is an phenomenal condition and could very easily pass for a car with 30-50K miles on it (honestly). The only problem is it has 140K on it I understand however that if taken care of and not abused (which this car doesn't seem to have been at all) these engines will last 200k plus miles. MY QUESTION IS THIS: the main performance mod I plan on doing this summer is a 2.1L kenne bell supercharger kit...do you think having that many miles on the engine is going to be a problem with adding a supercharger??? I know i could look into getting a completely new or slightly used engine, but then I'm going to be spending alot more money. I would love to get an 03/04 cobra engine and tranny but i know that will usually run 7-9k, and thats alot more than just adding a supercharger.

Plus, I've heard that the stock 2V engine that I have usually can handle no more than approx 450rwhp. Is this correct? And if so, do you think having as many miles as i do on my car going to factor into how long I can run a supercharger set up with roughly 400-425rwhp??? (im not really interested in getting forged pistons/rods/etc. = too much money right now)

My current mods include a Borla Stinger Catback w/ o/r H-pipe and an Accufab upper intake with an Accufab t-body too I believe. ONE LAST QUESTION: will the kenne bell setup with these already existing mods put me over the max HP limit for my engine???

Thanks for reading all this and for any advice!
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Unread 04-13-2011   #2 (permalink)
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Have a compression test and leakdown test done on the engine, that will let you know what kind of shape it's really in.

Other than that and assuming the engine checks out good, you wouldn't be the first guy to install a blower on a high mileage motor. I would try to stay real close to 400rwhp if you have any real desire to not grenade the engine. 450rwhp, even with a really conservative tune and regardless of mileage is a ticking time bomb without forged internals, imo.

Your existing mods.... Well, you're gonna lose the plenum with the addition of the KB, so I wouldn't worry about it. In the interest of keeping your current engine alive for a while, figuring you'll be intercooled as well which is pretty much mandatory with screw blowers, I would have it set up to push 8 or 9 lbs with a somewhat conservative tune and I think that should get you right at if not a little over 400rwhp.

Putting this or any blower on will increase the rate at which the engine wears, in terms of maintaining combustion chamber compression, not to mention additional stress on rods and bearings; but again, with a conservative tune and not driving like an ******* constantly your engine should live on for a while.

Get this KB strapped on there, then make a plan to start saving for a built shortblock and some heads. After you acquire those, feel free to turn the boost up and tune a little more aggressively and you'll have a real monster
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Unread 04-13-2011   #3 (permalink)
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finally someone else from ga, welcome to the forums. post pics when you can.
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Unread 04-13-2011   #4 (permalink)
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Thanks Socal2V for the advice...say worst case scenario my engine did blow after putting the KB on, would i just need to replace the shortblock? Also, can you have the engine tuned to output whatever HP you want it too? For example, if i put the KB on with the 9psi, can i have it tuned to output 375RWHP if I wanted to or even 400RWHP if I wanted to, or do you have to lower the boost level to do that? I thought you could only lower the boost level by changing the pulleys...

red1999cobra...thanks man.!..i plan on posting some soon..
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Unread 04-14-2011   #5 (permalink)
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Quote:
Originally Posted by BC03 View Post
Thanks Socal2V for the advice...say worst case scenario my engine did blow after putting the KB on, would i just need to replace the shortblock? Also, can you have the engine tuned to output whatever HP you want it too? For example, if i put the KB on with the 9psi, can i have it tuned to output 375RWHP if I wanted to or even 400RWHP if I wanted to, or do you have to lower the boost level to do that? I thought you could only lower the boost level by changing the pulleys...

red1999cobra...thanks man.!..i plan on posting some soon..
Yeah...
You would need to replace the shortblock if you blow your engine.
Your hp output will depend upon the S/C supporting mods. Most people don't go around limiting the hp output of their power adders. That's contradictory to the point of a "power adder."
You can lessen the amount of boost by changing the pulley.
Your car will more than likely be fine. Do a compression test as mentioned to see what condition the motor is in.
If you want the car to last, then don't drive like an ******* a lot and go burning out and redlining every shift.
Or... you can go have fun because that's what modding cars is for. If you blow it up, then just build it better next time.
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