column shift with headers sbc

[MD13ailey]

Not saying your incorrect but how doesnt the bore and stroke (which is how cubic inches is figuered out) determin the amount of air intaking and exhausting. under normal conditions (non forced industion) only so much air can go in because the bore and stroke are only so big. so the air that is in there has to come out and it would probly be a diffenant amount of air at a given RPM. thats why the LT headers are so much better than factory logs AND shorties. they scaveng better so exhaust in the cumbustion chamber can be evcuated and a better intake charge can be let in.

and if engine size has no bearing on szie of exhaust reuired. why cant a 900hp honda spool up a 200mm turbo??

 

[pontiacgp]

To do an extensive and proper determination for the correct size of the exhaust is a waste of time for a street car since it's impossible have a correct sized exhaust for the variation of driving situations in a daily driver. On our race car the optimum size is determined because we run it at constant wot except when entering a corner. You're correct that the bore and stoke come into the equation along the the CFM of the carb, the valve size and cam duration and rpm. But as I said for a street car a quick way of determining the CFM an engine is putting out you multiply the hp by 2.2. The issue with headers being too large for the flow is that the gases cool too quickly causing the flow to slow down so wrapping the headers is almost a must if you want to gain as much as you can from the use of headers. Your right that long tube header so scavenge the exhaust better than cast or shorty at low rpm but at high rpm the shorties so a pretty good job.

and engine size has no bearing on the flow that is pushed out....of course a 350 should push out more than a 305 but it depends on the carb size, valves and cam....with the example of a honda if you had the size of the bore, the stroke, valves sizes, cam specs and the rpm where the 900 hp shows up you could determine of the CFM of the exhaust and then you can determine why it can or can't spool up 200mm turbo and then us know the results

 

[Silent viewer]

ummmmmmmmm....... back to the column shift issue, if i read that right the question is whether or not the coulmn shift will get in the way with headers? if they are made for a g body they better fit, even with a floor shifter you still have the same stuff under the hood going to the coulmn to take care of neutral safety and all of that fun stuff.

 

[j_tizzle_84]

wow didnt mean to spark a war ill let you guys know how they fit in a couple weeks when i drop in the tpi 305. anyone got a tpi 700 r4 detent cable or sbc block mounts i could scoop. pretty much all thats holding me up

 

[MD13ailey]

yea me too but my headmans work perfectly (other than they have to come in form the bottom with the motor in the car) with no interference. like said above if they are for G body they better fit

 

[Silent viewer]

those motor mounts are like 7 bucks a piece at the parts store just look up a application for a mid 80s monte with a 305 or any other car from the 70s-90s with a small block for that matter.

 

[j_tizzle_84]

clears the column shift perfectly with these headers. but are tight on the frame on passenger side. nothing a torch and a hammer dont solve