dynimitejack

My hp goal is 300+ heres my parts list: Skunk2 stage 1 turbo cams, pro-series cam gears megapower header, megapower exhaust, composite fuel rail,Walbro 190 fuel pump, RC 440cc injectors, Neptune tuned by Tony @ T1, Hondata intake manifold gasket.

I bought a used s/c and sent it to Wade at thehighspeedlab.com to have it inspected, originally I wanted it to have the rotors coated to increase psi 1-4 lbs and run the 4" pulley but upon intial inspection Wade said the rotors were in good condition so recoating them would be pointless. He suggested porting the s/c to achieve 300hp+ or running a custom pulley and run 10psi. Also I'm going to have it coated with a thermal dispersion coating to try to keep the IAT's down.

Basically I need to know should I run a ported blower and 4" pulley or non ported and a custom 10psi pulley?

dynimitejack

I need some help guys!!!!!

Tony the Tiger

First of all, are we talking 300 HP, or 300 WHP? That's a totally different ballgame...lol

If you want 300 WHP, first thing on the list is find a way to cool the air charge. LHT IC, custom FMIC, water/air IC, whatever.. You aren't going to see anything close to 300 WHP regardless of what pulley/blower/ported set you go for; so just throw everything out the window until you decide on an aftercooler system

D-Rob

Good luck on the goal. You're definitely going to be hard pressed to get 300whp out of the M62'd B-Series.

Hell, there's only a handful of us with K20's that break 300whp with the M62 JRSC kits.

Here's my personal K20A2 with the JRSC kit and 3" pulley making 11psi.


Keep in mind, this is a high compression engine with large camshafts and a SUPERB flowing head from factory.

- Derek

SovXietday

It's been done, but you're going to need an LHT intercooler, CRV pulley with stepper pulleys (14psi+) and a built engine with a nasty header and big cam.

Jaker

There are 2 threads for you to look at where you'll find the answers to all your questions. The first one will take a while to go through, but there's so much information, that you will find out exactly what you need to know to achieve your goals.

https://honda-tech.com/forums/forced-induction-16/%2A%2A%2A-official-jrsc-thread%2A%2A%2A-1214810/

This 2nd one is an alternate route that will allow you to greatly surpass your goals:

https://honda-tech.com/forums/forced-induction-16/anyone-interested-500-whp-supercharger-kit-1997913/

Good luck and have fun!

dynimitejack

Thanks, I didn't think I was going to have to run an aftercooler... that may change my plans a bit, Oh well its going to put down more power than I'm running now and once I get my suspension done its going to be fun on the track. I'm not trying to build anything to destroy people with I just want my car to be quick and fun.

rmcdaniels

Here's my old 300 WHP JRSC setup. That motor was a bit of a mess too, too much piston-head clearance and too high CR made it knock limited, but there's some good info in there:

https://honda-tech.com/forums/forced-induction-16/300-whp-jrsc-setup-1518026/



Look in the JRSC thread for the pulleys that Veris got; those are the best that I've seen for making power and tracking a JRSC car without spending crazy $ for custom stuff.


I recently switched from a fixed tensioner pulley (like the JRSC has) on my SC setup to a spring-loaded tensioner (like the Cobras/Lightnings have) and it went from 8 PSI to 14 PSI, plus power no longer fell off at high RPM's, just from switching out the belt tensioner. I'd like to see what difference a good tensioner would make on a JRSC setup, but I sold all of my JRSC's. If you're really interested in making a lot of power from a JRSC, then let me know and I'll see if I can modify the JRSC tensioner brackets to mount spring-loaded linear tensioners on them. That would also help with the belt-slinging problems that JRSC's develop at higher power levels.

miniturboteg

Good thread guys and alot of info...How much power was the JRSC makin at 14psi rmcdaniels?

dynimitejack

I would defiantly be interested in a spring loaded tensioner, but at 10+ psi the jrsc is supposed be about useless. I don't really want to spend $1000 on an aftercooler.

rmcdaniels

It's not a JRSC any more, I'm using a modified M90 on a custom mount with a FMIC. It's in the second link that Jaker posted. We haven't been to the dyno yet, but we're estimating around 400 WHP when we go on Friday.


EDIT - It made 330 on 8 PSI.

rmcdaniels

You don't want to run 14 PSI on a JRSC, the tensioner would just stop belt slippage/jumping, possibly allowing you to make 8-10 PSI on the 6 PSI pulley setup and holding torque throughout the RPM range. That's just a guess based on my experience with my blower though, I don't think anyone's ever done it with a JRSC kit.

dynimitejack

Oh ok, well how long do you think it would take you to make a spring tensioner?

HiProfile

Friday the 13th. ****, you are just ASKING for more problems.

The JRSC isn't bad for what it is, but like any other lower-power kit, it takes a lot when you get the edge of it's capacity. Its the case that can use a bunch of work, as they designed it with some bit of noise reduction with the extra exit ports & shapes. The IAT's and heatsoak are part of problem too. If you read up on people's experiences, the intercooled versions far much better.

Quite honestly, for 300whp you'd be better off with those parts and a 60trim T3 turbo. A .48ar stg3 hotside would spool very quick, and the aftermarket parts would get you with 300whp on pump gas. You'd just have slightly worse transient response - but much more room to grow if you ever want to. Either Jeff Evans or Tony Palo posted a graph compairing a JRSC vs an Evo9's turbo on the same motor IIRC (or very similar). The only difference was the JRSC made more power before 3500rpm, and the turbo wasn't close to being maxed out.

D-Rob

Indeed, auto-tensioners are the way to go if you have a supercharged car.

I run the OEM K-Series belt tensioner that has a simlar design to the Cobra's/Lightning's/Cobalt's have, and it works flawlessly.




- Derek

Schister66

If you're really set on making 300whp+, just ditch the supercharger idea and opt for a simple turbo setup. It wil be cheaper, easier and more reliable...

rmcdaniels

I'd just mount an existing tensioner, they are commercially available for relatively cheap. Check out the tensioners and pulleys on page 14-16 of this link for an example:

http://www.fennerdrives.com/catalogs/tensioners.pdf

dynimitejack

The only reason I went with the jrsc is because I picked it up used for $800, I don't think I can put together a turbo kit for less than what I'm going to end up paying for the jrsc.

rmcdaniels: I sent fennerdrives an email asking what it would take to replace the jrsc tensioner with one of there spring tensioners. I'll let you guys know what they say.

rmcdaniels

That sounds good. I'd do the work in my shop if you'd like, I'm curious to see what kind of results it would yield. I've got an extra B-series that I could bolt everything to for fitment, I'd just need some JRSC parts. I've definitely got a manifold sitting around, but I think that's all I have left of my JRSC stuff.

Jaker

RMC,

Which tensionner would you consider for a B series setup? LT1001/LT1002 or a different one?

rmcdaniels

I'd try to shoehorn a LT200x in there if I could. It's almost 7" long though, so it may be a tight fit. I think that I can do the top one, just not so sure about the bottom one. I just need a JRSC so I can do the fitment. Someone reading this thread sent me a PM and may be sending me theirs so I can try it. I'll post if I can get my hands on one.

rmcdaniels

I've also got a couple of K-series rotary tensioners laying around, although they are pretty chunky, just not so long. I think that getting any kind of spring-loaded tensioner on there will be better than the current system.

extralargenog

iTrader: (1)

buddy of mine is making 314whp on a stock block GSR with an 11 PSI pulley. **** rips too...

dynimitejack

xlnog: what was your friend running besides the 11psi pulley?

ridikk

Is this on pump gas? Is your setup intercooled in any way? Hell just general specs would be nice, those are good numbers.