Hey Guys,

Stock internals. 97 Octane pump gas DD street car. ECU flash, no EBC.

Power vs Safety?

Pros and Cons?

TIA

 

97 oct? damn lol, thats some crapy gas, i always had a 5 bar with my 18g, never had an issue , some like the the injectors for piece of mind , i would do what your tuner recomends......

5 bar is a lot cheaper also ,but i like the idea of injectors for peice of mind...

 

If you don't plan on further modding, 5bar and call it a day. 60lbers if you plan to turn it up later. As was said, talk to your tuner and tell him your goals.

 

going with softronics flash, vivid's my "tuner" and advised 5bar fpr is sufficient at this level. Have full confidence in Dan's advice. Just looking for some owner experiences for other considerations. And with the timezone difference it's easier for me to ask here.

i always say this but "i dont plan on further modding". this time, i mean it. =)

Does anyone know what % duty the stock injectors will be doing with this set up?

Power difference all other variables constant?

Changed to the new style bosch MAF and understand the limits around 1.3bar. Think this is the limit of this tune. Advice here?

Spark plug gap? using the ik22 denso iridium, stock gap at moment

TIA

 

I think most here don't like that plug, there are better, cheaper alternatives, do a search. Whatever you use, if you run 1.2+bar, keep em gapped at .025-.027.

You tuner should be able to answer all of these for you. Hopefully he will post for you. Good Luck.

 

I ran a 5 bar with my 18g and never had a problem.

 

If he has one file and no EBC, it's gotta be a pretty conservative file, right? If that is true, you should have zero issues with keeping stock injectors and getting them to work a little harder.

Guys? Make sense?

 

Yes, but not sure I would wanna see an extended 1.3 bar with stock injectors and a 5bar. If Dan says it's OK, it's OK.

 

Thanks for replies. will look into plug options.

From searching the forum, appears a lot of cars are running the 5bar fpr set up with out issues. The difference between the two in terms of cost is 450. And a bit more work to install. Peace of mind or not running stock injectors over 90% is a plus. Wondering if there's other factors to justify the cost.

By power "differences, all variables constant", I mean what's the difference in power that can be achieved with upgraded injectors over the 5bar fpr in the case where there's no EBC and just a "conservative" ECU flash?

Thanks

 

The fact is that a 5 BAR will get you to the safe limit of pump gas. Are you planning on running race gas regularly?

That said, injectors are not THAT much more expensive maybe $500 total. The 5 BAR works but is less than optimal.

Keep in mind that if you ever want to return the car to stock before selling it, you will need to remove the injectors. Removing the 5 bar is much easier.

 

5 bar is ok on 18gs with that fuel your running.... should be good to 1.3 bar...
Open up your exhaust... make sure you dont have anything more then 100 cell cats and you will be happy...

putting injectors in can be very very costly..... and you have to make sure you have no O ring leaks on top of that...

 

I'm new the the 996 world and I was wondering if the 5 bar regulator is boost referenced 1:1?

If so how well does the stock fuel system handle 95psi fuel pressures(75psi static +20psi Boost)

 

Running the stock injectors at 5 bar gives you very little overhead for overboost and EGT enrichment protection if things go wrong. The 60lb injectors have a much better spray pattern than the stock injectors so when combining that with the extra margin of safety makes the choice a no brainer.

 

That's what I was thinking. Raising the fuel pressure to increase is a band aid solution and a compromise at best. The solution is always correctly sized injectors. Much safer and easier on the fuel pump.

There was a good fuel pump test I read and I was surprised at the amperage required when the fuel pressure rose.

 

thanks for everyone's comments.

Any suggestions on equivelant 60lb injectors that fit like stock?

The RC one's show in this link are slightly physically larger and minor provisions on rail bracket need to be made for things to fit. http://www.vividracing.com/catalog/p...?cID=10&pID=73

thanks