Stroke It or Bore It??????
- Thread starter SFStangGT
- Start date
UVBNHAD
New Member
I'm wondering what those main parts are myself? Would it be crank, rods, pistons, bearings because those are all replaced when you put in a stroke kit. What other main parts are there?
I kinda agree with the above post though. Stroking/boring a 4.6 is almost pointless because of the power you can produce with a blower or other modifications.
I kinda agree with the above post though. Stroking/boring a 4.6 is almost pointless because of the power you can produce with a blower or other modifications.
well i guess following that mechanics theory, you shouldnt put in forged internals because that would be changing the main engine parts. the mechanic my family went to has been turning wrenches for 30+ years, he retired, but he still works on our cars at his house. he is old school, but he still keeps up with all the current trends for working on cars. the mechanic that told you that shouldnt be allowed to touch anything newer than 1980. im sure he also recommends arco graphite oil, putting in STP at every oil change, and still says that we should be running carbs and leaded gas.
for the twin turbo setup, i would suggest running a 03/o4 cobra crank, some manley rods and CP pistons. if you want you can go with a big bore setup, as that will allow the air inlet charge to go in easier because of the unshrouded valves. however the big bore makes the cylinder walls thinner and theoretically could make them weaker. so just use a stock bore and stroke, maybe a .020 or .030 overbore if there is a ring ridge.
for the twin turbo setup, i would suggest running a 03/o4 cobra crank, some manley rods and CP pistons. if you want you can go with a big bore setup, as that will allow the air inlet charge to go in easier because of the unshrouded valves. however the big bore makes the cylinder walls thinner and theoretically could make them weaker. so just use a stock bore and stroke, maybe a .020 or .030 overbore if there is a ring ridge.
Defleshed
Satanic Mechanic
as a first year auto technician student, im no expert.......however, you must break it down to the basics i.e. what gives you more power? power comes from the air and fuel into your engine. the more air and fuel you can cram into the combustion chamber, the easier you can make power. thats why turbos and blowers are so popular: they compress more air into the chamber. IMHO, i would bore over stroke any day. if you only stroked the car with no other modification to the engine, you would just get a higher compression ratio (which isnt necessarily bad) and longer moving parts, which are not ideal for higher reving engines, although there are exceptions as we see from michael kidd's beast. 
whereas when you bore an engine, you allow more air and fuel into the chamber for a bigger "explosion". ideal, you would want to bore and stroke at the same time, but if i had to pick, i would say bore. but not too much b/c, as mentioned earlier, the more metal you take away from the block, the weaker it becomes. not good for a high horsepower car. there are always sacrifices tho.
whereas when you bore an engine, you allow more air and fuel into the chamber for a bigger "explosion". ideal, you would want to bore and stroke at the same time, but if i had to pick, i would say bore. but not too much b/c, as mentioned earlier, the more metal you take away from the block, the weaker it becomes. not good for a high horsepower car. there are always sacrifices tho.
kah9911
New Member
Well the big bore has proven to be a bit more powerfull everything being equal. It unshrouds the vaulves like some stated above. But the down side is it can only be done on a aluminum block. The stroker can be done on your iron block. If you do either put forged internals in because you have it torn apart anyway.
Here is some "light" reading for you. There was a good discution on MD a while back about this so hope you have plenty of time.
Here is some "light" reading for you. There was a good discution on MD a while back about this so hope you have plenty of time.
Sounds to me like boring or stroking is a waste of time on our 4.6's. Better off just saving the money and put it into better pistons, crank, rods, heads and block. As with Micheal's car, he had a completely built engine (internals, heads, custom cams, etc..) and a great tuner. Was it really the stroker kit that made his beast??? 
That is why I started this thread, I was wanting to know which is better and if either was even worth it.
That is why I started this thread, I was wanting to know which is better and if either was even worth it.big bore is ok on n/a cars, but horrible on the forced induction side. i wouldn't reccomend doing it because too thin of walls causes block failure.
stroker is a toss up, you get more low end torque but if you're going forced induction you need a bigger blower to compensate for the extra inches. i've never heard or seen anyone using a modular n/a stroker.
as for the stroker having a slow rev, i haven't noticed anything going slow on mine.
stroker is a toss up, you get more low end torque but if you're going forced induction you need a bigger blower to compensate for the extra inches. i've never heard or seen anyone using a modular n/a stroker.
as for the stroker having a slow rev, i haven't noticed anything going slow on mine.
white99gt
Founding Member
super street said:
Really and where have you seen block failure on a big bore with boost?
I personally say a stroker of big bore is not worth the extra money..Use it to add other parts to the car..
white99gt
Founding Member
SFStangGT said:I think I will have to agree with a person who is putting down over 600rwhp on pump gas. You might actually know a thing or two.
I know a few things..Ive turned every wrenchon my own car besides the building of the motor itself..But everything else was done by me..
Nothing against any of the other high hp cars with bigbore /stroker motors..I just think a stroker/big bore is not needed..If you have the extra cash fine..But a few thousand dollars goes a long way into a new tranny or rear setup to hold the power..Plus how much power do you really need in a street car
..
white99gt
Founding Member
super street said:yeah a 600+ hp car that runs 11.60s.
Guess you were not bright enough to look on my mods page and see i ran 11.60 with 481rwhp and a race wieght of 3610 on dot drag radials..
stallion98gt
New Member
Mossberg
Active Member
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