whats up honda-tech i was wondering if i should get a super charger for my itr ..here is some info 1st the motor was just rebuilt about 2500 miles ago and it is a jdm 98 spec itr with a 4.7 final drive the car was put on a dyno just to see the power and it made 178.9 whp and 117 tq i want more power soooo....im thinking of gettin a super charger since its safer and cheaper then turbo ,,,so im told but give me your input ...thanks ..my goal is to make something like 230-250 whp and way more then 117 tq

 

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Thats definetly very obtainable with a supercharger and about 8psi pulley. Personally I dont like superchargers, robs power from the motor. Also, both systems are equally safe when tuned properly. Both will require a tune, and there is A LOT more power to be made with a turbo setup, and you may want to leave yourself some room to grow and go with a turbo setup. Just my .02

 

Look into the LHT setup if you do supercharge. Superchargers run hotter than turbos and heat is the enemy of a high-comp setup - ie., you will detonate more easily.

Superchargers are a pain in the butt to tune for, IMO, and they are typically sized too small for our motors - bad match for a low torque high rpm motor. A supercharger tends to change the powerband of the engine to match the supercharger, instead of doing what a turbo typically does, which is supplement the powerband. You end up with a lot of midrange and an engine that doesn't like to rev. I'd rather do a supercharged LS or GSR than an ITR/B16.

 

ok........good info thanks

 

B series motors love supper chargers! turbo and a jrsc is a complete different upgrade, you cant say a turbo is better and vise verse, the jrsc suffers from heat soak but there's ways around that with methanol injection,nos,eyndyn,lht manifolds that can lower iat temps, the power band on a super charged motor is very linear with instant throttle response and almost 0 lag, and tuning is not any different nor harder than tuning a turbo and my tuner Shawn church loves the jrsc personally himself!, the reason why people wouldn't like to supercharge a itr is mostly cause of the gear ratio on the trans so they opt for a gsr or ls trans. there's lots or itr's super charged, they are fairly easy to maintain and install, hp is limited to around 300hp on stout setups, the jrsc is street legal at 6psi but there's a gready turbo kit that will make just about the same hp and is street legal as well at a limited boost setting but there's a boost lag gap before you will feel the power pick up, compared to my brothers turbo charged mr2, i like the jrsc way better, part cause i love the B series but cause its a very responsive feel you get when you accelerate, if you ever had a strong n.a motor it will feel like a much stronger version of that motor, i say this because before i went with a jrsc i had a strong 216 n.a gsr and throttle response was very instantaneous, then i added a jrsc at 5psi and it made 230hp tuned and it felt like it was twice as strong from the throtle responce, it felt almost the same but just way stronger its the only way i can explain it, check my build thread gl!,https://honda-tech.com/forums/showth...2556604&page=4

 

had mine on for a year and loving it....cant wait to finally get it tuned properly before Expo....ive had no problems with mine.....

 

First of if you never had a high comp. super charged motor i wouldn't put out miss info like that, the fmu will run the jrsc perfect on a itr with no problems at the factory boost setting, iv even had a high comp gsr motor tuned @5psi with a 11:6 comp. ratio, made 230hp would of made more but the sk2 pro 1 cams were a bit to big but it was good cause it kept the dynamic compression down. as long as its tuned it will run perfect, it does suffer from heat soak but at 6psi its not that big of a deal although keep in mind it will heat up after a few pulls, so the lht manifold is the cure for that flaw in the jrsc kit, but your gonna pay a arm and leg, i just paid $1,800+ for my custom kit.

Oscar Jackson thought about this kit very well before it was designed and sold, i would take back your comment! the kit performs flawless with the supplied electronics/fmu. what you said about it changing the power band ect.. makes no sense!, of course it changes the power band! it gives it a hell of a better power band! and there would be hardly any difference between a supercharged gsr compared to a supper charged itr, its only the trans thats gonna make the difference then cams but the power will still be just aound the same at the same boost level, and a ls supercharged will make less hp than a b series supper charged motor. some people make there own style lht manifolds so search the what jrsc are you running thread and find the guy who fabed one for his d series manifold and see if he could hook you up cheaper idk its worth a try imo, all in all ya a turbo will make more hp, but its all up to you with what you want gl.

 

keep itr trans ls trans is great for gramma lol

 

No, I won't change my mind on this one. Having tuned a few JRSC cars and after seeing what they're capable of (or rather, not capable of), I don't think superchargers are a great idea on a high-comp motor, and having to band-aid a bad setup with water injection is not a good idea. Plus I don't know anyone that could handle running an FMU for more than a couple of weeks before throwing it in the trash because they suck so badly.

JRSCs are great for somebody looking for minimal power gains and an extremely expensive and difficult upgrade path - ie someone that doesn't know much about cars and wants to bolt it on and forget it. There's a reason JRSCs pop up for sale so often and there's a reason no one runs the "engine management" supplied.

That being said, whatever he wants to do is his choice, and glad you enjoy your supercharged setup - not many people stick with them long, so enjoy it.

 

First off, saying a GSR and an ITR platform are going to produce the same numbers is dead wrong. Everything besides the block is different. Also, those FMU units supplyed in the JRSC kit are no better than a shiny paper weight, especially with all the tuning systems available for the honda ECU, that unit in my opinion should never go on a car that someone wants to last for more than a few months. Supercharger kits in general for the honda/acura platform and pretty weak in my opinion, and grossly complicated for the minimal power and tuneability you can get out of them. For just a little extra cash you can get a decent turbo setup that will perform better, leave more room for growth, and prob. be easier to install. There are great success storys out there with both JRSC kits and peiced together kits, so to the OP, just serach around a bit and you will find all the info your looking for.

 

Well i didnt say they would make the same hp but the itr will only make a few more hp, And i have no experience using the fmu cause i always tune it on my hondata ecu, like i said its limited to around 280-300hp and you will get more from a turbo, but the jrsc is still a great upgrade.

Well i agree with you on the fmu and water injection, but they do give a lot more power compared to the amount you would pay for other upgrades like ex,header,intake ect.. that wouldn't give you near as much power spending almost the same amount. But saying people get super chargers cause they don't know much about cars! is the most dumbest thing iv heard! so your saying people that run big turbos and whatever else besides a supercharged set up means they know allot about cars! But i do love my jrsc and if you are looking for minimal hp under 300hp then a jrsc is not a bad choice if you want like said above more hp and room to grow than go turbo.

 

Superchargers make much more linear power and great for off the line. Turbos make more power, but it's more exponential. Also the power comes in hard which tends to break driveline components if your not careful. The Rotrex supercharger setup works very well so I hear.

 

first of all, this SC vs turbo discussion has been covered several times before just do a search and lets not get into the peeing contest again!!! the OP is asking for pros and cons of the JRSC, Pros: linear usable HP (which is great for a street car/DD), linear torque, instant throttle response (aka no lag), fairly cheap if found used, CARB legal. Cons: limited between 200-300HP, non intercooled (unless purchasing LHT mod), suffers from heat soak, difficult to install in chassis smaller than an EK, belt driven parasitic drag. considering your only looking for 230-250hp, i'd say its a perfect upgrade for your goals just dont exceed 7-8psi on that motor as it may cause knock due to the high compression.

 

ok thanks..i had a turbo car before and it was a pain in the but i just want to make more pwer and not have to take this motor apart since i was just rebuilt by a honda tech 3k ago.. im not trying to go more then 250 whp..how long do these super chargers last ??

 

High compression and high intake temp charge is not a good combination for pump gas. i guess there are expensive ways around that but as for running an FMU with a S/C thats just retarded. s/c if anything are more finikie with temps and tuning and pulling out timing and riding the detonation threshold.

A properly designed turbocharger system will give you just abotu instant power and will surpass power production of a s/c and keep things safer. Also a supercharger isnt INSTANT power and i hate when peopel say that. granted it might be a little quicker than a moderate turbo system but with a smaller turbo your probably going to see the same boost levels relativly near the same rpm. a supercharger is driven off the belt of the engine so as rpm increases so does boost. its not like your can be at 2500rpm and floor the pedal and get your 6-8 psi boost fomr a carger it will have to come up in rpms to get more boost just like a turbocharger.

IMO a type r motor with s/c not the best of setups but it will work and make power just get it tuned prperly and not run a damn fmu. its 2010 not 1980. plenty of cheap software out there to get a tune one an be 100 times more reliable and make more power safer.

I personally though would recomend a properly designed turbo system. Not a "KIT" persay but somethign pieced together with the expert advice of a turbo dealer and mechanics, tuners etc.. on a type r id run a gt28with a .63 hotside. with the short gear ratios of a 4.7 type r trans spool wont even be an issue. your running through the gears so quickly even all motor and the revs stay way up that you wont even notice any spooling issues.