like almost every other car out there !! Besides, an efi adjusts for all that.
That it does, but it still reduces air density and therefore power.
The car has a/c, I doubt the small loss of power would be a concern. Personal experience tells me to keep everything under the hood and out of plain sight. Nothing attracts destructive morons than stuff peeking out of the hood. You never know when you're going to have to park it somewhere unattended for a while !!
When I sealed the cowl hood to the carb the car ran SO much better, especially in the summer heat 100* days,, A/C ON [ drivability, power] AFR's were more stable, the length of the runners is VERY important to my combination, 24" from the back of the intake valve to the end of runner, so yes it will stick out of the hood. I have surgery tomorrow so progress will stop for awhile.
Last edited by csk; 07/04/1903:06 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
This has shown to be pretty close if the csa is close to correct from my dyno time. there are 3 pulses that can be used, Bowling's Intake Runner Computator Computation Results: Input length is 24 inches For 2nd harmonic, RPM range is from 4895 to 5940 with a pulse strength of 10 percent For 3rd harmonic, RPM range is from 3678 to 4203 with a pulse strength of 7 percent For 4th harmonic, RPM range is from 2867 to 3207 with a pulse strength of 4 percent
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
Been doing some tuning, if you EVER go with EFI get the Dash/tuner, hand held ECT,,,,, the one I need is only$ 800.00 YEEHAAAA :), I also had to shorten the ram tubes, it was VERY hard to drive & see LMBO,, I will now use the 3rd & 4th intake pulse for power, total runner is now 17" long.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
I officially hate my hood now,a lot of hindsight AFTER the hole was cut, BUT I really had no choice. I'll get use to it maybe ,,,.to me it looks better without a hood.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
I agree on the flat hood, as always its a money thing. Tuning is going ok, the Holley HP is really not the correct choice for a Hilborn set up even though that is what they sell with the injector assy, it only has 1 o2 sensor to tune the ECU, it really should have at LEAST a bank one & bank two base fuel map that the ecu runs on. when the engine heats up all those throttle blades move & changes the calibration, I hooked up my Innovate wideband through a channel on the Holley ecu so I can at least datalog both o2's side by side & can manually tune the right bank to match the left bank Holley ECU wideband. wide open throttle is not a problem, its all the very light throttle low rpm areas that are tough to tune with 8 throttles & one o2 LOL. it idles like a stock cam 440 hp, can run 1500 rpms in overdrive & lock up the converter,,,, smooth as glass. the Dominator Holley ECU has two o2 sensors but you can only pick left or right or average of the 2 sensors for the ECU to tune off of.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
How does the power “feel” compared to the old combo?
Yes when it gets cooler, we have been over 100deg its BRUTAL. The but dyno says its pulling MUCH harder, even in the 100deg heat, my converter used to flash about 4200, now you nail it & its 5000. I hope the trans & or the converter are ok it does not feel like its slipping it just PULLS
Last edited by csk; 08/15/1907:53 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
Does the HP setup have a setting for the individual throttle blade system? I know my Megasquirt system has a mode for that individual throttle blades but I don't know what makes that different. What do you do for vacuum signal to the ECU? you have the cylinders all hooked together for an average or does it just read one cylinder?
I am a little surprised the HP system can't at least do some kind of modification bank to bank, how different are your readings side to side?
I feel you on the hood, when I went to a tunnel ram I went back and forth. Nobody could provide me with the measurements I needed to make sure things worked right(Hemi scoop or cowl). In the end I got a flat hood and cut a hole in it. I like the way it looks without the hood but it goes a little faster with the hood on.
Does the HP setup have a setting for the individual throttle blade system? I know my Megasquirt system has a mode for that individual throttle blades but I don't know what makes that different. What do you do for vacuum signal to the ECU? you have the cylinders all hooked together for an average or does it just read one cylinder?
I am a little surprised the HP system can't at least do some kind of modification bank to bank, how different are your readings side to side?
I feel you on the hood, when I went to a tunnel ram I went back and forth. Nobody could provide me with the measurements I needed to make sure things worked right(Hemi scoop or cowl). In the end I got a flat hood and cut a hole in it. I like the way it looks without the hood but it goes a little faster with the hood on.
The o2 reads one bank, from cold to operating temp the engine & everything grows, it causes the throttle linkage to change from side to side, in my case it causes the pass side to start running leaner the warmer it gets so I have to run that side a little richer, The HP has sequential individual cyl tuning, but as far as closed loop the pass side is on its own, so I set it up for closed loop after 1800rpm. on the vacuum there is a little manifold block that has small lines from each cyl to it.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5