David Neibert
SCCoA Admin
Mike,
Got any preliminary test results on the new manifold ?
David
Got any preliminary test results on the new manifold ?
David
Intake manifold design considerations.....
- Thread starter XR7 Dave
- Start date
I did not get to go to DD's last weekend but am planning on the 2/2 weekend. Hope the weather is good enought to make the eight hour trip. I am still waiting on the good weather to get some local road miles on the car. But so far it works great, I finished putting in EGT's on each cylinder to check the airflow for each cylinder.
Soon, very soon I hope.
Mike
David Neibert
SCCoA Admin
XR7 Dave
Registered User
Hectic schedules and unforeseen delays have gotten in the way of being able to post anything. Trust me you'll all know about it when we get results.
Ira R.
Registered User
That sounds very positive. Can't wait to see what you've come up with. Inquiring minds, and engine builders currently engaged, want to know
Ira
David Neibert
SCCoA Admin
Mike,
Did the March 22nd tuning session happen ? If so what were the results ?
David
The setup did not do well without a intercooler. Intake temps were around 200F, the snow kit did not offer what I had hoped for in the way of cooling the intake charge. With that we did not push the engine, we had 16 degree max timing and we did not go over 5000 rpm; but we did net 288 rwhp at those numbers. Also the engine managment system was detecting knock from the oem knock sensor but we could not hear anything using the old broom stick trick. I plan on changing out the oem knock sensor for the Electromotive one for compatability. Now if we had a cool air charge, I believe we would have done very well. Overall, I was a little disappointed, but thats part of trying something different. Next is to start street tuning the car with E85, get some more timing into the engine and get back on the dyno. I do plan on bringing the car to Dayton in the spring and to start working on a water/air intercooler; hopefully for the shootout.
Dave Dalke: any observations that you made that I did not list?
Mike
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David Neibert
SCCoA Admin
Mike,
How much boost were you able to run ?
David
How much boost were you able to run ?
David
15 psi with a 1:1 jackshaft pulley and a 3.5 dia SC pulley.
Dave Dalke, we did run 288 hp, right?
Mike
David Neibert
SCCoA Admin
Mike,
For such low boost and timing that's good power. Looking forward to seeing what it does with a cooler intake charge, more boost and some timing advance.
David
PS: If it were as easy as bolting it on and making big power...everyone would have a fast car.
For such low boost and timing that's good power. Looking forward to seeing what it does with a cooler intake charge, more boost and some timing advance.
David
PS: If it were as easy as bolting it on and making big power...everyone would have a fast car.
XR7 Dave
Registered User
We spent most of our time chasing false knock which in the end prevented us from doing anything constructive with the E85. It is my belief that the E85 would have made great numbers but we were out of time at that point.
200 deg intake temps seems really high but I have my doubts as to the accuracy of those numbers due to the location of the sensor with respect to actual airflow. It is going to be difficult to get accurate air temp #'s with this manifold.
We did make 288rwhp but that is no reflection of what the combination is capable of. We really weren't doing any HP tuning so we weren't even trying for a big number. I think we did 2 pulls to 5000rpm the whole day.
The only observation that I have is that the 200 deg ACT reflects only a 40 deg temp rise during the run so heat from the blower is not as big of an issue as it may first seem. Again, I think there are issues with the location of the sensor.
200 deg intake temps seems really high but I have my doubts as to the accuracy of those numbers due to the location of the sensor with respect to actual airflow. It is going to be difficult to get accurate air temp #'s with this manifold.
We did make 288rwhp but that is no reflection of what the combination is capable of. We really weren't doing any HP tuning so we weren't even trying for a big number. I think we did 2 pulls to 5000rpm the whole day.
The only observation that I have is that the 200 deg ACT reflects only a 40 deg temp rise during the run so heat from the blower is not as big of an issue as it may first seem. Again, I think there are issues with the location of the sensor.
XxSlowpokexX
Registered User
With the 4.6 AED blower setups we had good luck tapping a runner for ACT readings. Where is it on this intake and why would it be so off?
Also with the newer 4.6 engines that are knock sensor equiped thereis a tendency to cause false knock readings when using forged pistons. The slap of the piston causes the false positive knock.
unsure just how sensative the SC sensor is or if you even have forged pistons but I would definitely look into that
Also with the newer 4.6 engines that are knock sensor equiped thereis a tendency to cause false knock readings when using forged pistons. The slap of the piston causes the false positive knock.
unsure just how sensative the SC sensor is or if you even have forged pistons but I would definitely look into that
Yes the motor had forged pistons and the sensor is located at the back wall of the intake manifold with the blower discharging into the front section of the plenum. I plan on replacing the OEM knock sensor with the Electromotive sensor and maybe I should get some "det" cans to listen for knock. You maybe right, there maybe something else that the knock sensor is picking up.
Mike
Just to rock the boat here cause I'm good at it
Me gonna get slapped LOL!
FT
Can not slap you on this one but the intake plenum is slightly smaller than oem. Not sure how to tell the computor about it though.
Mike