1 3/4 or 1 7/8 headers on a 427?
#1
1 3/4 or 1 7/8 headers on a 427?
What headers should I go with I considered shorties but I'm gonna end up going long tube 427 dart 224/230 cam on a 114 with afr 245s and 10:2:1 compression the trucks on 35s with stock 4.10s at the moment I'm looking at 1 and 3/4s but would the 1 7/8s help the bigger ci breathe better or what?
#6
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wretched73 (08-06-2021)
#7
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iTrader: (5)
considering my blown LS1 (8L equivalent displacement) flows plenty good on 1 7/8", i don't think going full-hog on 2" is really necessary.
i do agree that 1 3/4" would choke the top end, but for a truck on 35s with only 4.10s, how much high-RPM driving will it really see to take actual advantage of the extra size? remember, everything has trade-offs, and the larger primaries (a lot more $$, especially for 2") would give up more off-idle grunt, which is what that little cam seems to focus on.
those're just my thoughts on it.
i do agree that 1 3/4" would choke the top end, but for a truck on 35s with only 4.10s, how much high-RPM driving will it really see to take actual advantage of the extra size? remember, everything has trade-offs, and the larger primaries (a lot more $$, especially for 2") would give up more off-idle grunt, which is what that little cam seems to focus on.
those're just my thoughts on it.
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#8
makes children cry
iTrader: (5)
will 2" read higher on the dyno? absolutely, so if he's chasing a peak power number: get 2"
what's his budget? if he's working with peanuts, 1 3/4" will get him by but leave a lot on the table while still providing excellent off-idle torque. granted i ain't priced headers in about 10yrs, but i know the 2" were LOTs more cash than 1 7/8 at the time & weren't worth it in my particular case for a couple extra ponies in addition to moving my power band farther up.
what's his budget? if he's working with peanuts, 1 3/4" will get him by but leave a lot on the table while still providing excellent off-idle torque. granted i ain't priced headers in about 10yrs, but i know the 2" were LOTs more cash than 1 7/8 at the time & weren't worth it in my particular case for a couple extra ponies in addition to moving my power band farther up.
#9
My cam is a mild one, I basically have to pass a 2 speed sniffer which is idle and at 2500rpm that's it no visual I'm sure I could get away with a bigger cam but It's basically a 2500 stall with a shift kit so it's more of a low rpm to mid range motor anyway