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Discussion Starter #1
Im looking into buying a JR SC with the 2.6 pully and have a few questions id like answerd if possible.

1. On a stock car what would the HP to the wheels be around?

2. What size injectors would I need to run this setup without maxing out the duty cycle and still have room for other power increasing mods?

3. How much work would it take to get the car to 190-200 whp?

4. Would it be better to look into a 2.5 long tube header/flex/exhaust or would 2.25 be more to the cars likeing?

5. Overall reliablity of the JR, ie how has the car/engine survived the test of time.

6. Is it a loud SC or pretty quiet?

7. Some idea of track times with it?

8. Looking at running nitrous with it later on, (2 summers from now) what would be the safest way to set it up?

9. Any comments you have on the JR in the way of performance or whatever else.
 

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Before someone flames you...try searching around...I know alot of your Qs can be answered by searching "Jackson Racing"..."JRSC"...etc. Good luck!!!


CCC
 

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Get a copy of Focus Fanatic and read...
You'll find all your answers in there...
 

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Search, young Jedi


And, to answer one of your questions, yes, it will be louder, esp under boost. But it's a good loud.
a very good loud indeed. took my first ride in a jrsc'd svt yesterday and the sound was beautiful. at 4k the blower was screamin and the car was pullin. great buy in my book.
 

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IMHO, it's not loud at all. I was expecting annoying loud before i got it put in, but its actually pretty quiet, even in the upper RPMs...
 

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I'm in the end stages of trying to get serious power out of my JR M-45. I just got it back from Endyn with a 2.3" pulley, so I have an extra 2.6" I used for about 5 months. To answer as many questions as I can:
about 170-180 WHP / I am trying to get 200 WHP or better with the refit & coating from Endyn and have run 42 lb injectors right from the start / I can't comment on your choice of exhaust - I have a Random Tech cat & a custom exhaust (nice and quiet) / I blew up the stock motor (shattered piston #1, bent the rod - have for souveniers)
because of TUNING PROBEMS / got a new block @ 9.2 - 1 CR from Tom's shop / and lastly the thing screams under boost -
it scares the s#*! out of other "performance" cars when I pass them. NOTHING sounds as cool as a blower whining when you have a quiet exhaust that doesn't drown it out. It was barely noticable with the original pulley. Performance wise it is much better than original, but you have to get PROPER TUNING by a pro rather than a guesstimate chip burnt.
Good luck.
 

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ulackfocus, Have you dynoed your car after getting the blower back from Endyn? I'm curious what difference that work makes in HP output.
 

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I'm in the end stages of trying to get serious power out of my JR M-45. I just got it back from Endyn with a 2.3" pulley, so I have an extra 2.6" I used for about 5 months. To answer as many questions as I can:
about 170-180 WHP / I am trying to get 200 WHP or better with the refit & coating from Endyn and have run 42 lb injectors right from the start / I can't comment on your choice of exhaust - I have a Random Tech cat & a custom exhaust (nice and quiet) / I blew up the stock motor (shattered piston #1, bent the rod - have for souveniers)
because of TUNING PROBEMS / got a new block @ 9.2 - 1 CR from Tom's shop / and lastly the thing screams under boost -
it scares the s#*! out of other "performance" cars when I pass them. NOTHING sounds as cool as a blower whining when you have a quiet exhaust that doesn't drown it out. It was barely noticable with the original pulley. Performance wise it is much better than original, but you have to get PROPER TUNING by a pro rather than a guesstimate chip burnt.
Good luck.
I didn't notice the supercharger whine much at the stock configuration. However, with each boost increase, it got louder (naturally). Even with my fairly loud exhaust (RT cat, FocusSport flex pipe, FS "stealth" resonator, and FS ceramic coated exhaust and running 14 psi.) my supercharger whine is VERY noticeable (i.e., LOUD) outside the car. The exhaust doesn't even come close to drowning it out. Of course, I'm sure there are Focus people with louder exhausts than I have. Yes, it is pretty scary (deafening in an enclosed dyno chamber). According to Lidio, you can spin the hell out of these blowers with no loss of longevity of the blower.
 

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I just got it back, but it's not on the car yet. I feel like an 8 yr old the week before Christmas - I CAN'T
WAIT !!!!!!! The only thing I need to hear is that somebody can tune the ATX whether it's a chip or reflashing
the computer. Tom? Mike? How's that coming since you got your ATX?
 

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I think the fuel system will be maxed out w/the 2.6" pulley. I put 30 lb injectors onjust to be sure I would have enough fuel but I understand that Dan-d did not and his car is still running "stock" fuel system w/jr black box.
 

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you can get 30 lb injectors cheap enough - try going to a Mustang site. They are the common size for N/A 5.0 upgrades and maybe you can get a used set for a song. Hell, they're not that tough to install. If you've changed spark plugs then you've got the basics down for injectors
(but be careful of the fuel spillage)
 

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ive got a jrsc, 2.6 pulley, and vibrant exhaust, and 3 grand to make it faster! what kind of engine/supercharger mods are there to get max hp with that base and 3000$. I like the idea of nitrous...

Jon
 

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For three grand, I am pretty sure that you could get a Whipple charger, a custom adapter plate that incoporates a Laminova air-to-water intercooler and the custom tuning needed to run it. Since screw chargers are efficient above 20psi, it will not be the weak point: you will three grand to upgrade the motor to take advantage of all that it can give you!
 

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yep, didnt understand any of that!
 
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