They FINALLY arrived......
#21
Oregon engine prices are higher due to our 'green State'. We remove each engine and drain all fluids (more labor=more cost) but it'* still cheaper than buying a cheap motor from elsewhere and paying shipping for a motor you can't personally inspect.
There'* nothing to 'port' on a bottom end. It will remain stock until after the intercooler and possible cam. My cam will be custom from the ground up, but will be modelled in a fashion after INTENSE'* blower cams for the S2 with respect to duration.
There'* nothing to 'port' on a bottom end. It will remain stock until after the intercooler and possible cam. My cam will be custom from the ground up, but will be modelled in a fashion after INTENSE'* blower cams for the S2 with respect to duration.
#22
Quick question on the injectors... you calculated that the current need is less than the S2 injector. Now that you have them and the motor will be getting done, do you fore see a need for the extra fueling from even larger injectors?
#23
I've outflowed my stock 29lb injectors at 4bar which runs them at 33lb.
I selected the 32lb injectors to run at 3.5bar producing 34.5lb flow.
I can still jack them up to 4bar if I choose and get them to flow at 37 lb, or:
Move to the 36lb S2 L67 injector at 3bar. I split the difference for the time being. So if I need more flow (assuming I achieve my goal of running intercooled on a ported top end with a cam or even sticking with my 1.8 rockers), I have the ability to continue to increase flow at the turn of a screw or a quick phone call (or a short trip to FIE).
FYI, 36lb injectors will flow at 41.5 if you run them at 4bar.
I selected the 32lb injectors to run at 3.5bar producing 34.5lb flow.
I can still jack them up to 4bar if I choose and get them to flow at 37 lb, or:
Move to the 36lb S2 L67 injector at 3bar. I split the difference for the time being. So if I need more flow (assuming I achieve my goal of running intercooled on a ported top end with a cam or even sticking with my 1.8 rockers), I have the ability to continue to increase flow at the turn of a screw or a quick phone call (or a short trip to FIE).
FYI, 36lb injectors will flow at 41.5 if you run them at 4bar.
#24
Originally Posted by willwren
FYI, 36lb injectors will flow at 41.5 if you run them at 4bar.
Edit.. can you please explain the bar difference. I know you did to me on the phone once and it was very good and interesting info that would benefit others as well.
#25
1 Bar (barimetric pressure) = 14.7 psi
3.5 Bar = 51.5 psi
4.0 Bar = 58.8 psi
My adjustable 4.0 Bar regulator can actually go to a little over 60 psi which is about what the fuel pump produces.
I have mine set now at 54 psi key off and primed. The recommendation for my performance adjustable regulator is 56-58 psi. That is about 4-6 psi higher than stock to account for the 4-6 psi higher boost levels.
I still run rich at about 11 AFR WOT but normal at 14.6 at idle or cruise.
It'* easy to confuse AFR to 1 Bar since the numbers are almost identical.
Bill, I think you are lean at 46 psi key off and primed.
3.5 Bar = 51.5 psi
4.0 Bar = 58.8 psi
My adjustable 4.0 Bar regulator can actually go to a little over 60 psi which is about what the fuel pump produces.
I have mine set now at 54 psi key off and primed. The recommendation for my performance adjustable regulator is 56-58 psi. That is about 4-6 psi higher than stock to account for the 4-6 psi higher boost levels.
I still run rich at about 11 AFR WOT but normal at 14.6 at idle or cruise.
It'* easy to confuse AFR to 1 Bar since the numbers are almost identical.
Bill, I think you are lean at 46 psi key off and primed.
#26
Senior Member
Posts like a Northstar
Joined: Jul 2007
Posts: 571
Likes: 0
From: Memphis,TN Originally from MA
Originally Posted by radomirthegreat
Why do you need the replacement engine to have good compression if you're going to work on it?
#28
I have a 90-day warrantee on the motor, and certified oil pressure and compression. The engine was in running condition when pulled from the donor (95 Buick Riviera).
I made a deposit on the motor today, and will pick it up early next week.
I made a deposit on the motor today, and will pick it up early next week.
#30
Pardon me if this is ignorant or has been answered before, but why do you strive to run your engine at exactly 14.7:1 AFR? Car manufacturers today only run at 14.7 because it produces the lowest combination of the regulated exhaust emissions. (Read: not the lowest level of some of the gases when measured individually, but the lowest point when the gases are averaged together.)
This is the best chart I could find in a hurry. It doesn't show NOx and CO2, but the NOX curve is roughly at its lowest point at 14.7 as well. Obviously, the more efficient you make combustion, the more CO2 you produce, and its curve is highest at 14.7. (HC + O2 = H2O + CO2.) One of my instructors at trade school often said, "The only reason anything has changed on cars since the 70s is fuel economy and emissions!" He'* mostly right, too.
Anyways, where was I going with this? Oh yeah, peak power is actually gained at a richer air/fuel ratio, around 12.5/13:1. A richer ratio is also an excellent KR killer too. Many racers run at 12 to 1, and most powersports products (Seadoos, ATVs, etc) run a similar ratio too.
Is it for fuel economy? Or is it because we all use the factory PCM to control our engines, which still wants to run 14.7:1?
Not trying to insult anyone, by the way, or step on any toes, just trying to stimulate some interesting conversation.
This is the best chart I could find in a hurry. It doesn't show NOx and CO2, but the NOX curve is roughly at its lowest point at 14.7 as well. Obviously, the more efficient you make combustion, the more CO2 you produce, and its curve is highest at 14.7. (HC + O2 = H2O + CO2.) One of my instructors at trade school often said, "The only reason anything has changed on cars since the 70s is fuel economy and emissions!" He'* mostly right, too.
Anyways, where was I going with this? Oh yeah, peak power is actually gained at a richer air/fuel ratio, around 12.5/13:1. A richer ratio is also an excellent KR killer too. Many racers run at 12 to 1, and most powersports products (Seadoos, ATVs, etc) run a similar ratio too.
Is it for fuel economy? Or is it because we all use the factory PCM to control our engines, which still wants to run 14.7:1?
Not trying to insult anyone, by the way, or step on any toes, just trying to stimulate some interesting conversation.