Should I (naturally aspirated) install bigger injectors now?
03-13-2014, 06:47 PM
#1
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Should I (naturally aspirated) install bigger injectors now?
Like the title says.
Naturally aspirated, built engine, cop ignition, Megasquirt pnp gen1
headers, air intake. Stock fuel pressure reg, with a 190lph fuel pump
Probably wont be getting into my turbo project for another month.
Getting in some rx7 550cc
a few quick questions.
Should i install them now.
Obviously what would i need to change? fuel tables of course, and some engine constants. but what about spark tables? or AFR
Naturally aspirated, built engine, cop ignition, Megasquirt pnp gen1
headers, air intake. Stock fuel pressure reg, with a 190lph fuel pump
Probably wont be getting into my turbo project for another month.
Getting in some rx7 550cc
a few quick questions.
Should i install them now.
Obviously what would i need to change? fuel tables of course, and some engine constants. but what about spark tables? or AFR
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03-14-2014, 01:04 AM
#7
Quick answer from Emilio with my build for 150WHP, Nope... (99-00 used)
Now for turbo part, I did try RX7 injectors and they're junk.... bought 1000CC Injector dynamics and they idle like stockers.
By changing Req Fuel, AFR stay about the same so you can work with either injectors. At least RX8 injectors, they're far superior to RX7's
Now for turbo part, I did try RX7 injectors and they're junk.... bought 1000CC Injector dynamics and they idle like stockers.
By changing Req Fuel, AFR stay about the same so you can work with either injectors. At least RX8 injectors, they're far superior to RX7's
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03-14-2014, 12:14 PM
#8
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Quick answer from Emilio with my build for 150WHP, Nope... (99-00 used)
Now for turbo part, I did try RX7 injectors and they're junk.... bought 1000CC Injector dynamics and they idle like stockers.
By changing Req Fuel, AFR stay about the same so you can work with either injectors. At least RX8 injectors, they're far superior to RX7's
Now for turbo part, I did try RX7 injectors and they're junk.... bought 1000CC Injector dynamics and they idle like stockers.
By changing Req Fuel, AFR stay about the same so you can work with either injectors. At least RX8 injectors, they're far superior to RX7's
Will i notice any type of power increase?
Also the injectors I am buying are from a member on this site. They are a little rough but he only wants 70$.
-You really think i should buck up and pay 30-50 more $ for rx-8 injectors? i may be able to locate some.
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03-14-2014, 12:22 PM
#9
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Well that makes me sad... didn't you buy my RX7 Reds? :(
Safe is relative. You have a megasquirt, right? You should be fine with something larger (as long as its not like a 850cc EV1 
) just retune for them, just like NiklasFalk said above.
No. IF the ones you are moving too have a better spray pattern, you might see an efficiency increase, but that's about it. Be sure you have your deadtime/battery correction/latency configured correctly.
Yes, I'd spend the extra $30-50 for the Denso RX8s rather than the EV1 RX7s even if the RX8s are slightly smaller. What is your power goal again?
^^ Best advice in this thread thus far. Propz
) just retune for them, just like NiklasFalk said above. No. IF the ones you are moving too have a better spray pattern, you might see an efficiency increase, but that's about it. Be sure you have your deadtime/battery correction/latency configured correctly.
^^ Best advice in this thread thus far. Propz
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03-14-2014, 02:36 PM
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Well that makes me sad... didn't you buy my RX7 Reds? :(
Safe is relative. You have a megasquirt, right? You should be fine with something larger (as long as its not like a 850cc EV1) just retune for them, just like NiklasFalk said above.
No. IF the ones you are moving too have a better spray pattern, you might see an efficiency increase, but that's about it. Be sure you have your deadtime/battery correction/latency configured correctly.
Yes, I'd spend the extra $30-50 for the Denso RX8s rather than the EV1 RX7s even if the RX8s are slightly smaller. What is your power goal again?
^^ Best advice in this thread thus far. Propz
Safe is relative. You have a megasquirt, right? You should be fine with something larger (as long as its not like a 850cc EV1
) just retune for them, just like NiklasFalk said above. No. IF the ones you are moving too have a better spray pattern, you might see an efficiency increase, but that's about it. Be sure you have your deadtime/battery correction/latency configured correctly.
Yes, I'd spend the extra $30-50 for the Denso RX8s rather than the EV1 RX7s even if the RX8s are slightly smaller. What is your power goal again?
^^ Best advice in this thread thus far. Propz
probably the nicest and most helpful response i've had while on this forum EVER props to you.
Also, right now im just slowly preparing for boost.
i will end up running low boost 5-8psi on an entry level kit, begi and misc parts.
thank you once again
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PM me your PP address.
03-14-2014, 06:58 PM
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Hey i saw these,
I know the seller did not say much on the add, but he did list the compatible vehicles as the 1.3l 2005 rx-8
are these the guys im looking for?
Mazda RX8 Yellow Fuel Injectors Original 2004 2005 2006 2007 2008 | eBay
I know the seller did not say much on the add, but he did list the compatible vehicles as the 1.3l 2005 rx-8
are these the guys im looking for?
Mazda RX8 Yellow Fuel Injectors Original 2004 2005 2006 2007 2008 | eBay
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03-14-2014, 07:17 PM
#17
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Hey i saw these,
I know the seller did not say much on the add, but he did list the compatible vehicles as the 1.3l 2005 rx-8
are these the guys im looking for?
Mazda RX8 Yellow Fuel Injectors Original 2004 2005 2006 2007 2008 | eBay
I know the seller did not say much on the add, but he did list the compatible vehicles as the 1.3l 2005 rx-8
are these the guys im looking for?
Mazda RX8 Yellow Fuel Injectors Original 2004 2005 2006 2007 2008 | eBay
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03-17-2014, 07:50 AM
#20
Retired Mech Design Engr
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I am running the same Inj with good results N/A with MS3. Turbo is not in yet, but build is in progress.
The particular route I went was to buy some in rough shape for $10 each and then add $22 each to have them cleaned, checked, and the bits replaced. Pretty much same total $$.
Easy to change out. Just watch the little rubber spaces that go between the rail mounting tabs and the mounting surface (head or intake manifold, I don't remember which). When you pull the bolts and move the rail, they can fall out.
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