spark

Hi everybody.
A friend of mine bought a JRSC from an ITR (B18C5), with the stage 1 upgrade.
He simply put it on a B16A2, didn't tune it and then KABOOM !
Cylinder 3 has gone...

So my mission is now to help him tune that damn thing, when the motor will be fully rebuilt.

So I need to know :
- The boost pressure of a JRSC in full stock trim for a B18C5.
- How much boost does the stage 1 upgrade provide ?
- What is the max boost pressure that a B16A2 can handle in full stock condition.

My theory is that there is too much boost for the B16A2 and the FMU can't handle it.
What is your opinion ?
Thanks guys...

MachAF

I assume by stage 1 he has the 9psi pulley, along with fuel pump.

He should be running 1 step colder plugs and retard the timing. Jackson's instructions tell you what to do. Did he follow those?

spark

He didn't have the instructions, it was a second hand supercharger with only the hardware

spark

Does a FPR do enought work for the JRSC stage 1 ?
What about the stage 1 fuel pump ? How much does it flow ?

Spunkster

What fuel pump were you using?
What static fuel pressure did you have?
What was the base timing set to?
How much boost were you making?
Did you have an Air fuel meter?
Were you using any of the JR electronics?
What do you mean by stage 1 upgrade?
Upgraded by who?
What is the airspeed velocity of an unlaiden Swallow?

Stock boost on the ITR kit is 5.5 psi.
Your biggest problem was running untuned. It's like playing with fireworks while standing in a pool of gasoine.
On a stock block and properly tuned, you should be able to run 8or 9 psi with no problems. It's all in the tuning.

spark

Spunkster : I know it's all about tuning that's why i'm asking for your help...

We put a B16A2 in a civic coupe Si that was a sohc vtec of 125hp. It run perfectly, after that the owner of the car just put the JRSC...

- We use the stock fuel pump of the SOHC coupe
- The static fuel pressure was the stock one (he didn't have any gauges)
- Timing was only retarded 1°
- Don't know about the boost (he didn't have any gauges)
- No air fuel meter (he didn't have any gauges)
- Yes all the JR electronics were fitted with the browler
- The seller told us it was a stage 1 upgrade kit, that mean it had an other pulley (more boost) and electronic that come with
- i guess the seller upgrade it
- uuhh ??? sorry my poor english can't handle that... What do you mean by "unlaiden Swallow"

The fact is that the JRSC was bolt on a ITR and my friend bought it for his B16A2.

Spunkster

Sounds like fueling may have been your problem, inaddition to possibly too much timing.

The last question was a reference to the Holy Grail....sorry.

Nine

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">What is the airspeed velocity of an unlaiden Swallow?</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spark &raquo;</TD></TR><TR><TD CLASS="quote">- uuhh ??? sorry my poor english can't handle that... What do you mean by "unlaiden Swallow"</TD></TR></TABLE>

LOL!! Achete des jauges! Thats a start at least. Pick up a 190lph fuel pump and find out how much boost you are running, so you can tell how much fuel to add and how much timing to retard.

spark

Spunkter : sorry my IM don't work...
OK so I'll check for the fuel management.
Does anybody have some JRSC instructions for me please ?

Nine : it's not my car, it's just a guy I know. Ok I'll tell him.

JT

Go here to download the manual for your application. http://www.jacksonracing.com/pages/manuals.html

spark

Thanks JT

I have seen on page 12 of the ITR manual instructions, they're talking about a high flow fuel pump, did this pump come with the standard kit or with the stage 1 upgrade ?
I'm sure the seller didn't know about it and sold the bowler without the fuel pump.

It's gonna be a hard setup I guess...

FMXer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spark &raquo;</TD></TR><TR><TD CLASS="quote">Thanks JT

I have seen on page 12 of the ITR manual instructions, they're talking about a high flow fuel pump, did this pump come with the standard kit or with the stage 1 upgrade ?
I'm sure the seller didn't know about it and sold the bowler without the fuel pump.

It's gonna be a hard setup I guess...</TD></TR></TABLE>

the pump should have come with the upgrade, and the stock one will not hold up the the high fuel perssures of a FMU.
I will put my $$ on the timing be to advanced, it should have been retarded more like 7 deg.

spark

Thanks a lot guys, I send him all your information, hope he will understand. He is not familiar with forced induction an tuning not like me learning a lot of thing on that board, planning to be on the turbo side one day.

spark

Finally the guy want to sold the JRSC, is bored and disgusted.
He want 2530$ for the bowler.
This unit must have a half past year, it was intially on an ITR with the stage 1 upgrade and then on a B16.

I think he sell it with the electronics hardware.
I'm interesting in, and planned to make it run with the VAFC hack. I would like to use a Hondata but nobody can tune these things in Europe.

So how much for the unit ? Wich fuel management technic should I use ? I want it to pull really hard does it mean to lower the compression ratio (like turbo does) ?

THX

FMXer

...I would say a used JRSC isn't worth more than $1,700.
For what you would be spending in extras after the JRSC, you could have bought a NICE turbo kit, full hondata, Wide Band A/F, and just tune it yourself.
Hell if you get good at tuning it you could start making some $$ on the side tuning other peoples hondata's since there is no one around where to live to tune them

You leave the compression ratio alone with a JRSC, you will be fine with a turbo and the stock compression ratio.

Nine

I wouldnt pay more then $1500 for a used JRSC even with the upgrade. I picked up mine for $1300 with gauges and everything I needed to get it running. If you are spending much more then that, ya might as well just get a turbo.

spark

FMXer and Nine : thanks for your advices.
Yeah for going to 9 PSI, it would be cheaper to have a turbo, I was thinking about it but wasn't sure...
What do I need to fine tune a hondata ? A wideband sensor and a dynojet ?
All the dyno I know in here are giving false numbers, just imagine a DOHC ZC non vtec with 139 whp !!! with just i/h/e... lol something is really going wrong in here...

EDIT : and don't expect to have a graph, they just give you your max output number that's all !