Hi,
I am building a 383 sbc.
This is what I have right now:
holley 4150 HP series 750 cfm (no choke tower)
Performer RPM Airgap
AFR 195 75cc
I am told that lack of choke will make for rough running cold starts. I also was told that with a newer multispark ignition, which i will be running, and the exhaust crossover hooked up, I will not have a problem. I am in WA, lows in the winter are around 25 degrees. Is it true that with the above two items, and without the choke, I will be okay for winter cold starts?
I am confused a little by the terms here: exhaust crossover, heat riser. Am i correct in assuming that exhaust crossover is the same as heat riser?
I understand that the AFR heads have the heat riser passages. The Airgap doesnt, so I will be returning that and getting a regular Performer RPM that does. I cant find the part number for it though.
http://store.summitracing.com/partdetail.asp?part=EDL-7101&autoview=sku
the picture shows a crossover (i think) but it says that it does not have a crossover in the "notes" section.
how is the exhaust crossover regulated? is there always exhaust gas heating the intake up? is there a way to make it only crossover when the engine is cold?
also, i think it would be good to use the fast idle cam from the holley choke kits to dump more fuel in on cold starts, but since my carb has no choke provisions, is there a way to do this? and how would it work, does it just idle fast until i give it gas, then it idles normal?
Thanks,
Jerome
I am building a 383 sbc.
This is what I have right now:
holley 4150 HP series 750 cfm (no choke tower)
Performer RPM Airgap
AFR 195 75cc
I am told that lack of choke will make for rough running cold starts. I also was told that with a newer multispark ignition, which i will be running, and the exhaust crossover hooked up, I will not have a problem. I am in WA, lows in the winter are around 25 degrees. Is it true that with the above two items, and without the choke, I will be okay for winter cold starts?
I am confused a little by the terms here: exhaust crossover, heat riser. Am i correct in assuming that exhaust crossover is the same as heat riser?
I understand that the AFR heads have the heat riser passages. The Airgap doesnt, so I will be returning that and getting a regular Performer RPM that does. I cant find the part number for it though.
http://store.summitracing.com/partdetail.asp?part=EDL-7101&autoview=sku
the picture shows a crossover (i think) but it says that it does not have a crossover in the "notes" section.
how is the exhaust crossover regulated? is there always exhaust gas heating the intake up? is there a way to make it only crossover when the engine is cold?
also, i think it would be good to use the fast idle cam from the holley choke kits to dump more fuel in on cold starts, but since my carb has no choke provisions, is there a way to do this? and how would it work, does it just idle fast until i give it gas, then it idles normal?
Thanks,
Jerome