Hi all,

sorry for asking for more help!

Started working on setting up JRSC DC2 type R it’s at 6 psi with the fuel pump upgrade.

The car has been running very rich so I’m going down the AEM ems route for mapping I think.

At the moment I’m trying to get the car running ok without the EMS it had some minor detonation so I have retarded the timing to 9BTDC And left the fuelling stock using the JR FMU.

At idle about 780RPM with the check engine connector on the timing occasionally moves about 2 degrees every now and then from it’s setting.

I was wondering is this is Typical of anything to do with the JRSC set-up and or fuelling method.

If it’s not (I don’t think it is) what would be the cause what should I look into?

Any help would be very kind there’s not really anyone in the UK I can even get anything like a sensible answer from.

Can anyone recommend any good detonation detection kit

As you may have guessed I’m new to this forced induction stuff.

Regards

Perry

 

get a J&S ultra safeguard or better yet, go turbo

 

If you've only installed the base JRSC kit and pump, then there's nothing there that should effect your timing.

You hooked up the IAT (intake air temp) relay, correct?

Unfortunately, it's very difficult to get the JRSC kit to run well with the ITR using JR's parts. However, once properly tuned with Hondata or the EMS that you plan on using, it will run like a champ.

Sonny

 

Thanks Sonny,
Had a good look at the IAT hack yuk! checked that that the realy works and IAT Resitance changes when the presure switch hits boost thats all looking good.

Maybe a fuel presure problem, I hate the way the fuleing is done on the kit so so wrong. I'm one of about five JRSC hondas in the UK so theres no help with real world user feedback.

all the best

perry

 

for the detonation try colder plugs, as far as runing rich you may want to chick the fuell presur with the fmu vacum line on and off and see if there in speck for the kit

good luck

 

Thanks dash will do!

does anyone have spec info on the kit all I have here is the install PDF, it has nothing about baseline fueling numbers.

I have the aftermarket fuel pump

all the best

pez

 

email their tech support there website is, http://www.jacksonracing.com/.

 

is it just me or is 9 btdc still wicked advanced? i thought stock was like 15 btdc? can some1 tell me im wrong please?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KraZEtEggIE &raquo;</TD></TR><TR><TD CLASS="quote">is it just me or is 9 btdc still wicked advanced? i thought stock was like 15 btdc? can some1 tell me im wrong please?</TD></TR></TABLE>

i think they give you the opption, of 9 or 15 depending how the car runs. his i think has more to do with the ambint air temp then any thing colder the air the more retarder the timing neads to be. inless you componsate with fuel or some outher way.

 

JR's tech support is a joke. Larry is who you wil talk to and hes nothing more than a glorified salesmen.

And the JR FMU is terrible to. You should consider upgrading that.
Did your JRSC kit come with an ignition control box? The JRSC kit that I installed on a friends Prelude SH has a **** to retard timing.

 

Hi muckman,
no timeing control at all horrible, just the FMU agree it's looking crap, the kit was on the car and had only done 2-3k with it on no damage as far as I can tell but needs to be setup well I've dialed in loads of retard so far need to get something like AEM EMS in the UK theres no one runing AEM and about five of us with JR blowers So i'm working pretty much on my own.

thanks for the pointers

perry


Modified by perrymoo at 7:18 PM 3/12/2004

 

perrymoo:

Do UK ITRs have 11:1 compression like the rest of the continent? I think the US ITRs have lower compression. Without the AEM or Hondata, I think the higher compression ITRs are much closer to the ragged edge of detonation.

Christian, who goes by austrian type-R here, had a JRSC ITR but he burned a piston when he tried to run at 10psi, and I believe he had many of the Band-Aid mods at the time. He has since rebuilt his engine and went turbo and Hondata. He has nice video chasing down some 911s at the A1-Ring...

 

Hi road runner,
yep ukdm ITR 11.1 cr whats the US ITR's cr, Well I would go turbo but then it gets even harder to get help and for me the only way to go turbo would be with a full solid build theres a guy in another forum that I talk to that has a very cool b20vtec build the 12-14 psi over 400 wheel hp with under a bar of boost.

so so nice

perry

 

I used to have a jrsc on my b16 so I'll chime in
Two things:

1) At 6 psi there was detonation only in very hot weather. It's a good idea to retard the timing from the distributor. Stock timing is 18degrees, and it ran better at 14-16 degrees.

2) Since you're 11.1 compression you might also need high octane gas even at 6psi. I can understand how you would knock if you don't have at least close to 100 octane in there.

 

Without a BTC or map controller it will be nearly impossible to get rid of detonation without killing the low end.

Only when i went with the Hondata was I able to make any real power and run safely at 11 psi making 265hp

 

EDM DC2 ITRs are 11.1 CR. USDM is 10.6 if I remember rightly. I run 10psi t3/t4 on afc, stock block 11:1 cr all day long and beat it on track, no detonation.

Perry I trust that you are using Optimax 98 octane? Get the EMS (Hondata etc..)and get the timing properly dialed in. If you need advice, you can contact CPL Racing (Official UK Hondata dealer), hes a great guy and will give you good advice or SumoPower down Southern tip but they are just getting into Hondata. IM me if you want details.

Oh, There are a lot more than 5 JRSC in the UK that I know of

Steve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kleefton &raquo;</TD></TR><TR><TD CLASS="quote">1) At 6 psi there was detonation only in very hot weather. It's a good idea to retard the timing from the distributor. Stock timing is 18degrees, and it ran better at 14-16 degrees. </TD></TR></TABLE>

if i remember correct, stock timing is 16 degrees. and i'm looking at the install instructions and they say "While the engine is warmed up, reset the ignition timing to 10o BTDC for 93 octane fuel, 7o BTDC for 92 octane fuel."

so dont run 16 degrees and expect your motor to last.

 

Hi spukster

Sorry about your car I will be going down the ems route for sure, your plots looked Great, any news on your car ? are you going to start again ?

Perry


Modified by perrymoo at 9:17 AM 3/13/2004

 

Hi swlabhot,
nice to here your haveing fun in the UK i'm big on NA tuneing and have had little or no help with FI here, what sorta power you geting safley?

It would be great if I could find them then I'm well conected in the UK honda seen do you know if there runing EMS? be fun to see the results.

hondadata are not my firstchoice I know they have abasemap but I'm going down the AEM.EMS route, I don't know CPL but i'll look then up.

to make it work well it's had some less than lovely tweaks that I want to map out. it baselines well and does solid 1/4 with heavey wheels so it will be quite quick.

than I can dial in some PSI seen a few charge cooling Ideas maybe go down that route for a bit of home grown fun.

longer term may well go turbo but I would want a built motor just for the JOB and it would have to be in the 350-450 Whp area to be worth the cost.

A few pals here build full Race BTC engines that have offerd support but they have never built a blown honda motor so one step at a time

good luck with the ITR


Thanks

perry



Modified by perrymoo at 9:56 AM 3/13/2004