I'm a little confused after reading about the installation of the Blox intake manifold on a 94-01 gs-r. My car is a 97' gs-r with an obd-i system. I read something about getting a tuned P28 ECU after installing the manifold, so that I can get the most out of the manifold. I was wondering if this is necessary? What car is the P28 from and how much do they usually go for? Also, where would I get it tuned at and how should I tune the ECU? Thanks!

 

tuning it if all your going to do is throw on the intake manifold is not worth it. if your going to do intake manifold with bigger throttle body and an intake then i would get a chipped p28 and have it tuned. in all reality though you could just get away with bumping the fuel pressure a few psi with a b&m fpr.

 

hang on, your car is already obd1? what ecu did you use? if you already have an obd1 p72 you would be insane spending money on a p28 when the one you have is perfectly fine. you can get a manifold swap pretty close with a wideband and fuel pressure regulator if you don't want to spend $200 on a hondata s100 and $300 for a tune

 

I also have a short ram, 2.25" midpipe, and a dc 4-1 header (won't be getting installed until the summer). I don't think I'll be getting a bigger throttle body because that's a lot of air output that I won't need since skunk2 cams will be the most internal thing I'll do to my engine and I'm not even sure if I'll do it.

@idrivesideways- Yes, my car is currently obd1. I'm using an ob1 p72. So your saying that I don't need a p28 and I can run my stock obd1 p72 without any problems after I install the new manifold? I'm worried because I heard that once the ecu hits a certain rpm, it'll look for a butterfly and if nothings there, there will be a dip in power. Is this true? If nothing bad will happen and I can run my obd1 p72, it'll save me a lot of money. I don't understand what you mean with "you can get a manifold swap pretty close with a wideband and fuel pressure regulator" if I don't want to spend on a hondata or a tuned ecu?

 

If you don't want to tune the car for the single runner manifold, then reinstall the stock intake manifold until you do the other bolt on mods and cams, then get it tuned. Running a stock ecu tune with a single runner manifold will cause the car to run poorly, even slower than with the stock manifold in some cases.

 

talk to somone who knows what their talking about

 

Do I have to get a p28 ecu or can I just tune my obd-1 p72 ecu and it'll work perfectly? What's the benefit of having a tuned p28 vs. a tuned p72?

 

a p28 and p72 obd1 are both chipable. Either way if you get a stock p28 it would need to be chipped first in order to tune with so might as well chip your obd1 p72 ecu.

 

I was under the impression that I cannot use my p72. Why are the people creating "how to install blox manifold on gs-r" threads stating that I need a chipped p28 if my p72 is usable also?

 

the p28 is j*st another option. The p72 works as well. They both work the same on*e *hipped and reprogramed for yo*r set*p.

 

Thanks. Do yo* know who *an *hip and program a p72 e**?

 

Theres alot of people who can chip and program your ecu. Theres a few website but I usually get my chipping kits and other tuning accessories from Xenocron.com. Talk to Chris from there.

 

If you have an obd1 p72 the ecu can be socketed/chipped specifically for a gsr engine with your aftermarket intake manifold. This is the most popular application in the honda/acura industry. We do it every day...

 

Ok, so I won't need to buy a P28 right? Just chip my p72 with the blox intake manifold that I have and I will be okay? How much do you charge and how long will it take? Thanks

 

Artie, just to point out remember that on P72 ecu's the VTEC engages around 4500 and works with the secondaries closed. With the blox/sk2 manifold this is way to early and needs to be around 5400-5700... Gonna need more than a fuel pressure reg for this...

To the OP, you do not need a p28. Just have your P72 socketed and a basemap/tuned chip programmed for use with your setup. Any reputable tuner should have several tuned basemaps for this setup as it is one of the most common engine/manifold combos out there...

If you don't want the hassle of having your P72 chipped, you can buy a chipped P28, p30, p72 , etc ECU and install the correct basemap and be on your way...

Take your pick:

http://www.xenocron.com/chipped-obd1...ecu-p-129.html
http://www.phearable.net/shoppingcar...vtec-p-31.html
http://www.hamotorsports.com/socketedp28.html

 

5700 rpms... never had vtec need to be over 5500 rpms on any b18c1 with a blox/skunk2 im out of the over 400 vehicles we have tuned.

Correct, the obd1 p72 can be shipped. Pricing & information can all be found on our website.

 

Do you think I'll be able to pass smog if I install the blox manifold plus socketing my p72?

 

anyone?

 

ive done it to couple cars in town...they do fine...not ideal but it works. some of these guys just just remove the butterflies out of the manifold and it seems to run fine that way also...again not ideal.

 

Do you think I'll be able to pass smog if I install the blox manifold plus socketing my p72?

 

Instead of chipping a p28 or Socketing a p72, would I be able to use a p73 after switching my manifold and run perfectly fine?

 

wow dude. use the search button. stop askin the same questions. stop buyin parts u dont need, if u dont know what they do. noooob

 

you can optimize it this way but it doesn't creating a timing or detonation issue just using an FPR> the biggest drawback to not tuning is the dip from 4400-5-whatever the iabs opened at is the weak timing. with a single manifold you can fix the dip with a programmable ecu.

also, 5700 is too high for a gsr transmission, it will fall out of vtec on the 1-2 shift fairly easy. 5400 is borderline and 5000-5200 would be about ideal.

still there is no real mpg to be gained or even a tenth in the 1/4 in most cases. the car will certainly drive better tuned but i personally can't see how it's worth $500 for slightly better driveability.

 

Hey guy, I'm sure you didn't wake up one day and know everything about engine management alright? You learn by reading and asking questions. Don't waste your time typing what you just did. Just dont respond, it's as easy as that. If you need to voice useless thoughts, go talk to a mirror.

 

Thanks racebum. I just want to have all my areas covered and know for a fact that in order to run properly, I will need to tune or chip a p72/p28. I've read on a couple threads on team-integra and such where people are stating they are running fine without a tune.