hey i need some help i got a buddy selling a p73 ecu obd2 wondering how this gona turn out on my 98 gsr. well the gsr has hytech headers aem intake full catback pro series skunk 2 manny with a 68mm tb. if i can get some help it be great

 

i had a type r ecu ob2 on my bone stock gsr with intake only, it ran fine with no problems.

 

i ran one (p73) when my gsr just had headers,intake,and exhaust it was fine, oh but your V TEC will open later then stock a p72

 

it should be running better then the p72

 

not all the time. you will be running type r maps on a stock gsr motor with completely different internals

 

Regardless of what ebay says a type-r ecu wont give you more power or make your car faster.

 

p73-a03 is the correct ecu for a 98. get a fpr and scan tool when you install the ecu. pull up your long and short term fuel trims on the scan tool and set the fuel pressure so the short term bounces between -3 and +3 at idle. the car will run great if you do that. a vafc also might help since you could use a higher vtec than 4400 but 5800 is a little much for a stock gsr. give it a go and see what you think of 5800.

 

just get your car tuned and it will run fine

 

throw a type r intake manifold on it and youll be golden

 

on a gsr head?

 

and this fits a gsr?

 

will a stock p28 ecu damage gsr motor if plugged in and started?

 

LOL, so you are saying a b16 ITR manifold will fit a GSR head?

 

No but it will run like crap. You dont want single cam 1.6l fuel/timing maps on a gsr.

 

St. Jimmy's... No, he was banned. I mean neardon's sarcasm is not appreciated.

Compared to stock, it may not run bad with the Skunk2 IM. I still suspect that you will have some valleys in your torque curve due to incorrect VTEC RPM triggering. Keep in mind that the stock valve train was not desinged to rev as high as the ITR. You could run into problems if you are not careful.

If your buddy has this, can you try it first? OBD1 with a proper tune will be far better.

 

lol, your gonna confuse these poor kids!

 

Wow. I don't even know what to say about this thread. For one GSR heads are different from b16 and ITR heads in many ways, and the b16 heads and ITR heads are different in some ways for that matter. b16's and ITR's do not have butterflies in the intake manifolds like GSR manifold does, the bolt patterns are different, the water outlet on the intake side is different, the ports and combusion chambers are also different. The ITR heads also an inner valve spring on the exhaust side and have larger cams. The butterflies on the GSR intake manifold open up around 5700-5800 rpm and VTEC engages at 4400 rpm. ITR ECU engages VTEC at 5600rpm if I remember correctly. Your motor will run on that ECU, but it won't run to its fullest potential. Between the differences in a stock ITR longblock and a stock GSR longblock and the addition of aftermarket parts on your GSR motor, it may help, but may not. I would recommend in getting some type of engine management, such as Hondata, and having that tuned to your specific setup. That is the only way you will see the full potential of your setup. Nowadays, tuning is worth more than just throwing parts at your car and hoping for more.

 

A p73 intake manifold will NOT bolt up to a p72 head. The only option you have is getting a skunk2 or blox which are both ITR replicas.

Running a p73 on your gsr will not make a difference due to different internals. Now if you get a single stage manifold like skunk2 and at least ITR cams, then it will make a difference to an extent, tuning is your best option.

 

I ran a p73 on my gsr and it loses power down low and has a worse torque curve but the HP peaks higher after 6000 to 8500.

 

LoL Jason with the technical explanation!

 

completely agree

 

cool thanks guys are big help i was thinking about running the s200 hondata but my concern is that hondata only use obd1 ecu

 

but a good one it was. also, the $200 you can score a wideband for really will help you guys out who either vafc hack or FPR mod the obd2 ecus. even a real scan tool will let you tune part throttle AF with a vafc or FPR if you know how to read it. spending $600 on hondata is great with a boosted car or even a killer all motor setup. these bolt on gsr's really aren't hard to tune though. one of my neighbors had me take a look at his gsr. it was stock internally with a full exhaust, blox and not much else. long story short it was a little lean on the wideband and a few psi on the FPR has the car running pretty well on the stock p72. if i could change the map i would probably add timing earlier but overall it's an easy way you guys can get these to run fairly decent.

 

i have a p73 obd1 chipped ecu and it wont workon my obd1 gsr anybody know why this is it wont even start any more

 

Yes, an OBD1 P73 ECU never existed. Go find what ECU you really have. Look for the p/n of the form 37820-P##-*##.