Damnit now I want a blown Mustang...

 

1. I am not arguing with you about the differences in types of SCs. They are different. However we are not talking about a SC in a Mustang or Cobra here. We are talking about one in a Jeep that does not have a high performance engine and has added a centrifugal SC so it will have a lot different performance than your Cobra. So to clarify my point on SCs, I don't see any SC kit giving the performance gains for rock crawling/ low speed wheeling in the 800-1500 rpm range (ie. off idle) that most Jeepers desire. Even roots and twin screws "start" their boost higher than that (according to Kenne Bell's web site and personal experience). Both types on a Jeep will be better than stock for street perfrmance and towing, just don't expect a miracle cure on a Jeep with this engine.

2. If you "can easily shred the tires at 1000rpm when I stab the throttle" that is great. However, if that is what you are doing then you're not staying at 1000rpm while you are doing that throttle stabbing, so you are not shreading the tires at 1000rpms. Why don't you post a video of your Cobra keeping a steady 1000rpms for 30 seconds for us to view the tire shreading going on. For slow speed wheeling/rock crawling most of us are looking for enough torque to get us over the obstacle without breaking traction and we'd like to do that without racing our engines to 3000 rpms.

3. As far as my previous statement on making peak hp/tq at the start of a run.... I recant it after further research (Kenne Bell) some set ups do peak near the start of the run, but then again we are still talking from 2500rpms not 1000.

4. I made no attempt to tell you how to launch at the strip, but you did confirm my point. You stated you launch at "3600-3700 rpms with heated drag radials."

5. To answer your question on what kind of car I track. I don't anymore. I did track a 2003 SVT Focus with a intercooled Vortech centrifugal SC, custom tuned, high flow cat, and exhaust on BFG KDW2s. I know, I know it is no where near the performance of a 490whp Cobra, but for a 4cyl to go from 151whp/173tq to 256whp/205tq ain't too bad. And I too launched at 3600-3700rpms.

Bottom line is for low speed wheeling and rock crawling most of us want the torqe down lower than SCs can give. In a jeep I don't care about shreading the tires or even wheel speed in general unless I am in the mud. For street use most of us don't want a race car, but do expect more than 50hp from an SC. If we can't get more than 50hp because the stock engine is too weak to support any more then the question is answered.... go with displacement.

Again, I am not arguing with you about the differences in types of SCs. They are different. I just don't believe either type are the cure for our torque issues at low rpms for wheeling.

 

Well, lots of good info here,

-Colder dense air = more power, but winter temps are too cold if you push the SC hard, which the results are = you become a member of the "Vented Block Club." I am a member of this club and it isn't a good feeling, specially when you are driving your best buds freshly tuned truck when it happensIt is costly. At least he was in the passenger seat when it happened.

-Does not matter what engine you have, (Minivan, Mustang, 1 ton Superduty) if you keep the SC/Turbo at lower boost and tuned conservatively, your motor will have a normal lifespan.
-If you go for higher boost, the motor must be built to handle it. period.
-For most people looking for a decent power increase, the SC is perfect. Supporting mods help make the SC that much better.
-For the people looking for gobs of power a V8 is the only option.
-Our OEM JK's make supposedly 200+ flywheel Hp = approx guestimate 150rwhp, would like to see a dyno of a factory run.
-A RIPP blower makes around 240rwhp as advertized = 270-300 Flywheel Hp, you will definitely notice a difference.

Everyone has a different opinion of how blowers work etc...blah blah and each has their own experiences. If anyone is wanting to increase power, it all depends on your cheque book. If you can only afford 5k, then the blower is your pick. If you can afford 10k+ then a V8 swap is for you. That's it.....

There is a guy on here with a Red unlimited that did the 5.7 Hemi swap by himself for 10K, I don't remember his name, but I am sure it can be queried. He did a great Job. He had a great write up too.

Good luck to everyone in the endless search for Power....and have a safe and Merry X-Mas....

 

Did you see my SIG....I have one forsale....untouched, and not modded awaiting a new owner I really want to sell it too. OEM supercharged makes underrated 390hp/390tq. Only 4912 miles!!!!

 

I am on my second JK and had my first dynoed. If I remember right it dynoed out at 161rwhp. I'll have to see if I can find the CD with the chart on it for you.

What are you asking for the Cobra you have for sale?

 

Okay, We are getting a little side tracked here and people are probably getting pissed off to our references. Looks like we are on the same page here anyway, but written words are always interpreted differently. I am sure if we were face to face we would agree easily. Like you say, even if i stab the throttle at 1000rpm, the rpms jump so quickly it doesn't hold there. I am only saying that I get so much boost that at 1000rpm when throttled, it easily breaks loose hence the result of the Roots blower. No reference to our massive 3.8's here. That is it. Common now a 30 sec clip of holding it at 1000 rpms?? Once spring comes around I will try to hold a break stand there once the tires are going.

Glad your are a SVT fan!! you know about the addiction

I will PM anyone wanting to know info on my Blue Cobra forsale, as i don't want to get $hit here for trying to sell stuff.....it highjacks the thread...

 

I too dislike the text world where we misinterpret things. There is a lot to be said for verbal and nonverbal communication where you see and hear the person you are interacting with. I am sure if we were face to face we'd be having a beer by now.

I absolutely know about the addiction.... I have always been a Mustang fan (I learned to drive on a '70 fastback) and I can't say enough about the SVT team over the years and the products they built. I still miss my SVT focus, especially in the twisties. I also heavily moded the suspension for auto/circuit cross. I was smoking the rest of the front wheel drive cars, but it still wasn't too much competition for a all wheel drive cars in the twisties or a rear wheel drive high hp in the straights, though it would hold it's own against most stock V8s. Even so I always wanted the elusive Cobra... maybe it is still in my future (after the kids are grown)

 

If I do the Mustang thing again it'll have to be an early 80's model because they look so unassuming; I love that sleeper factor. You can shove all sorts of things under the hood and it stills looks kinda like an Escort. I loved my little unassuming '81 Cobra that looked like it couldn't keep up with 5.0's. You get inside and the interior is like that of an Escort; completely simple and boring. You could be sitting in a Pinto for all you know. Then you turn the key and the 5.8 351 windsor with flowies (flowmasters) sitting right at the header and the pipes ending under your seats angled downward to bounce the sound off the ground and shake the cabin (of course! that's the only way to do it!) like you're right in the middle of a thunder storm. The cam sounded pretty violent too. You go easy on the pedal and it acts like an Escort or a Pinto and the sound actually quiets down a lot but man you push that throttle to where the secondary barrels kick in and f$ck you're gone like a jet fighter and the sound was better than sex. I loved pulling up to 5.0's back then when EVERYONE with a Mustang raced at the red lights. I'd keep the engine off and be unassuming: "Nice 5.0. I have a 5.8. You don't stand a chance." "Yeah right," they'd say. Then I'd turn it on and they'd about crap their pants. The light would go green and see ya...nothing but taillights. Can't remember what cam I had. It was a Lunati () I think. Man I spent so much time getting the right cam you'd think I'd remember the lift and duration.

More Mustang stories folks! Let's hear 'em!

 

OK so no offense but I'm pretty sure this is WAY of topic....wrong thread... for that matter wrong forum

SO TO GET BACK ON TOPIC

Here is a quote of what I've told others who have asked why I got rid of my RIPP SC...

"The RIPP supercharger never hit above 5 psi, even after their 500 mile break-in period....When it did hit 5 psi the Jeep's computer went into "limp" mode and you then have to turn the ignition off then on again (this happened a couple of times merging in with traffic...I was pissed), it goes into limp mode because of the "mass air flow" (boost) it is receiving (this is a problem with ALL superchargers for JK's)

...on another note, I started to have numerous problems "pop-up". The Jeep would randomly loose fuel pressure upon start up causing it to start then stall (not a confirmed "RIPP" related problem). Then when at idle for 5-10 min the computer would put it into limp mode just sitting there (very frustrating going down hills on the trails)...also not a confirmed "RIPP" related problem...just "happened" to be going on after supercharger was installed.


I have a good friend at Jeep, he's a head mechanic at my stealership...so while all of these things are going on we're replacing every component it could have been with no change, and he's covering everything on warantee...lucky me...during all of this we are speaking with Ross at RIPP and jumping through all of the hoops of what it could be on the SC's end...also with no change...


We suggested it was RIPP's piggy back computer at fault, they said there was a 1 in 100 chance it was that, and kept blaming MY Jeep....they wanted me to ship the box to them anyways to test it, but by this point I was tired of the SC and instead got a hold of Dan at Burnsville to change out the whole thing...


Supercharger's are sensitive, any SC...to water, mud, sand, etc....and I'm not the most "careful" wheeler, especially when everything gets done...that was another reason.


With Burnsville the swap is running around $21,000 with shipping....if you do it yourself with a used HEMI and tranny I've seen folks come in under $12,000...for me I went with them because of their experience
Also what sweetened the deal is Dan will sell any and all things I can't use with the HEMI (SC)



...I'm not one to bad mouth them because technically I didn't give them the proper chance to fix it...I was just fed UP...
In my opinion going naturally aspirated is the way to offroad if it's an option...I wouldn't get another SC...ever....even on the HEMI



...feel free to ask more questions!"

 

Hehehe sorry....

No more Stang posts from me I promise.