261 Build Up - 11/12/09 03:40 PM
Hi all, I am new here to the forum and I have some questions for you about my 261 buildup and what your thoughts are as to performance and there's no better place to take this question to you folks right here.
I am building up a 49 Suburban and an hoping to build a fairly stout 261 motor while still keeping it on pump gas and making it driveable for the family. Here are some details:
261 rebuild .030 over factory on the bottom end.
235 #848 head rebuild as stock with hardened seats installed
Patrick's mild cam (220@50, .433 lift) I think this is Deltacams Howard M4f, but don't quote me.
Headed milled .030
Clifford Intake / exhaust (not sure what exhaust size I need yet)
Holley 390
I know I am not going to win any races, but I was curious to know if I were going to do any headwork on it, what would it be? I know Clifford will sell you a head with larger valves and deck the head for higher compression, but I'd rather just buy and communicate to my local shop what I want done on the head. If I do any head work beyond what I have, what is the pros / cons (if any) and how much extra Torque / HP should I expect above and beyond what I have now as a buildup?
I know you guys know you're inine stuff here, so any suggestions would be greatly appreciated. Also, how shoould I match exhaust for peak performance and backpressure? X pipe, etc.
Thanks in Advance.
Patrick
I am building up a 49 Suburban and an hoping to build a fairly stout 261 motor while still keeping it on pump gas and making it driveable for the family. Here are some details:
261 rebuild .030 over factory on the bottom end.
235 #848 head rebuild as stock with hardened seats installed
Patrick's mild cam (220@50, .433 lift) I think this is Deltacams Howard M4f, but don't quote me.
Headed milled .030
Clifford Intake / exhaust (not sure what exhaust size I need yet)
Holley 390
I know I am not going to win any races, but I was curious to know if I were going to do any headwork on it, what would it be? I know Clifford will sell you a head with larger valves and deck the head for higher compression, but I'd rather just buy and communicate to my local shop what I want done on the head. If I do any head work beyond what I have, what is the pros / cons (if any) and how much extra Torque / HP should I expect above and beyond what I have now as a buildup?
I know you guys know you're inine stuff here, so any suggestions would be greatly appreciated. Also, how shoould I match exhaust for peak performance and backpressure? X pipe, etc.
Thanks in Advance.
Patrick