Hello true believers!

I have a situation. 1 year ago I went with a set of b16A USDM pistons and the car reacted very well to the increased compression, but now I'm picking up a JRSC for a song and want to know:

1. What my compression should be with the current set up (i've heard up to 11:7:1!)

2. Is it advisable to go with any form of forced induction at the increased compression.

Type R's go FI all day long so I don't see the challenge but I was hoping for a few thoughts on the situation.

Thanks in advance

twizt

 

c'mon help a brotha out!

 

C-SPEED's compression calculator shows that your engine is at ~11.4:1 with PR3 (B16A) pistons.

You can boost it, but your margin for error will be very small.

I think I would keep the boost at 6psi until you get everything running ok...then up the boost if you feel the need.

K.I.S.S. at first!

Sonny

 

Finally, a brave soul!! Thx Sonny! 11:4:1 whoa!

Any thoughts on fuel management?

 

The stock JRSC stuff will do the job (barely), but it will work. It's basically a 5:1 FMU and an archane IAT hack. You ABSOLUTELY MUST GET AN UPGRADED PUMP. Do not get the JR Pump...it will not do the job at higher boost. Get the Walbro GSS-342.

A better solution would be to get Zip's SMC and run RC440cc injectors or some DSM injectors, but that will require a resistor pack.

I'm a big fan of keeping it simple at first.

That being said, start out with the stock injectors and the 6 psi pulley using an intank pump. You must have at least a fuel pressure gauge ($30 B&M works fine) under the hood. Roll base timing back to 8 deg BTDC.

That is the simplest possible JRSC configuration. Get to that point and we'll talk.

Sonny


[Modified by Sonny, 12:39 PM 12/13/2002]

 

from experience, I do not recommend this set up. I previously, at a customer's request, supercharged a GSR with ITR pistons (11:1 give or take), and only with 5 degrees base timing and the regulator maxed would it quell the detonation - barely. This was at just 6lbs. This setup lasted a staggering 3 months, before the rings gave out, and then it just detonated to high hell!

I know you keep asking this question to different people because you want to hear it can be done. I know the whole reason you want to do it is because you can get the kit cheap. Keep asking and you will find someone who will tell you it can be with no problems. But from experience I do not recommend it. And further more, it's going to cost you a good chunk of change to do it correctly, which would defeat the purpose of doing this cheaply.


[Modified by VaporTrail, 3:51 PM 12/13/2002]

 

Sup John!

Perhaps i'm being taken in different direction by some pretty well respected people in the local scene, one in particular that shares your name (hint, hint) I'm not going to get into the "which tuner knows their stuff best" deal. I don't ask the same questions looking to hear what I want to hear. I ask the same questions of different people to get a well rounded knowledge of my situation so I can make an informed decision and not one based on fear or ignorance. Thanks again Sonny. You too John.

twizt

 

It is all in the tunning! I have run 10.5 - 1 for a while. No problems. I have put many blowers on Type Rs. I have a friend that ran 11.5 -1 ,13PSI ,plus it had NOS thrown on there now and again. Again tunning is the key, I wouldn't run over 8 psi start the timming low and work up. A programble system would be the way to tune it right. But it can be done, I boost high compression cars all the time.