Dart Pro I's, Hedman Headers, Spark Plugs
06-25-2005, 07:52 PM
#1
Racer
Thread Starter
Member Since: May 2003
Location: LaSalle ON
Posts: 375
Likes: 0
Received 0 Likes
on
0 Posts
Dart Pro I's, Hedman Headers, Spark Plugs
I'm looking at switching my Iron Eagles for a set of Pro I's. One of the reasons for the switch is that there is very little clearance between the plugs and the headers. Any advice on whether to go with straight plugs, or angle plugs? I have angle plugs in the Iron Eagles.
Thanks,
Bob
Thanks,
Bob
06-25-2005, 10:49 PM
#2
I have Hedman headers and had no trouble using 90o plugs. Or am I missing something?
Only problem I did have was mechanic routed the wires funky and two of them burned up. So today was spent replacing the wires and rerunning them, complete with brackets to hold them in place.
Only problem I did have was mechanic routed the wires funky and two of them burned up. So today was spent replacing the wires and rerunning them, complete with brackets to hold them in place.
06-25-2005, 11:08 PM
#3
Racer
Thread Starter
Member Since: May 2003
Location: LaSalle ON
Posts: 375
Likes: 0
Received 0 Likes
on
0 Posts
Do you have Dart Pro I cylinder heads also? Each make/model of cylinder head has the spark plug in a slightly different position and orientation. The car originally had a ZZ3 crate motor in it. There were no spark plug clearance problems at all with the Hedman headers bolted to the ZZ3 cylinder heads.
Bob
Bob
06-26-2005, 11:16 AM
#5
Le Mans Master
Member Since: Mar 2002
Location: Coming home from Luckenbach Texas
Posts: 7,456
Likes: 0
Received 2 Likes
on
2 Posts
That's a pretty radical solution to your problem!
Have you tried the Accel shorty spark plugs, which were specifically designed for this situation? And if you don't already have a set of wires with 90 degree plug boots, get em!
Have you tried the Accel shorty spark plugs, which were specifically designed for this situation? And if you don't already have a set of wires with 90 degree plug boots, get em!
06-26-2005, 01:46 PM
#6
Burning Brakes
I have Dart Pro 1 on my sb with hookers ,the heads are angle plugs and I can get to them better than my old rpm edel with angle plugs.
The plugs on Darts are pointed downward at an angle,since you have Heddmans this dosnt help you much.
The plugs on Darts are pointed downward at an angle,since you have Heddmans this dosnt help you much.
06-26-2005, 02:16 PM
#7
Race Director
The only thing I can see that angled plug heads seem to do is angle the plugs ( at least one or two ) into the header pipes. I have had two sets and I just recently had to pay 200 bucks to get new Hooker SC modified to clear the #6 plug.
If you can, take you headers with spark plugs to the speed shop and test fit on the heads you are buying that is the only way to know for sure if they will fit.
If you can, take you headers with spark plugs to the speed shop and test fit on the heads you are buying that is the only way to know for sure if they will fit.
06-26-2005, 11:27 PM
#8
Racer
Thread Starter
Member Since: May 2003
Location: LaSalle ON
Posts: 375
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by page62
That's a pretty radical solution to your problem!
Have you tried the Accel shorty spark plugs, which were specifically designed for this situation? And if you don't already have a set of wires with 90 degree plug boots, get em!
Have you tried the Accel shorty spark plugs, which were specifically designed for this situation? And if you don't already have a set of wires with 90 degree plug boots, get em!
I am using 90 deg. boots and have become an expert in building my own wires as I have been through several sets from switching distributors (to/from HEI), switching timing control in the C950 software and burning the wire near the boot from header heat. Helpful hint: To prevent burning the wires near the boot, get a 2nd set of boots, slit them and slip them over the wire behind the actual plug boot. I haven't burrned a wire since doing this.
Spark plug interference is just one of the reasons for switching heads. I'm looking for better local cooling in the head (The CR is 10.3:1), knocking 50+lbs off the front end of the car, and of course more power.
I desktop dyno'd my combo with ported Dart Pro I 215's and an Edelbrock Performer RPM and it showed a pretty healthy increase in torque and power right across the power band from 2500 - 6000rpm. I was surprised that when I tried switching to 1.6 ratio rockers in the software to feed the bigger runners, it actually showed a decrease in torque and power across the power band.
Hopefully the guy I'm getting the heads from can come up with a set that I can bolt the headers to so I check the interference as Motorhead suggested. He said he may be able to locate a set.
Bob
