5.1 Stroker

[98saleen88]

What is everyones opinion on the Probe 5.1 stroker kit for our motors, i have a little extra money and i think it would be nice to be little different....

 

[98mstanggt]

What is everyones opinion on the Probe 5.1 stroker kit for our motors, i have a little extra money and i think it would be nice to be little different....

Was looking into the same thing before i lost interest in my project but seem like i good deal but thats just me

 

[330CubeGt]

Humm how much does that cost?.Why not just drop in a 5.4?

 

[98saleen88]

i beleieve its roughly 2000, i was thinking about a 5.4 swap, but sound the thought of having a stroker is always nice, but i already have a set of comp 274 xe (might trade for 278xe not sure yet) along with a ported piheads, and still debating on a type of intake, dont really want to use a stock pi one, actually thinkin of getting a custom fabbed one....

 

[MustangChris]

never heard of probe. i personally avoid no-name brands. ... ESPECIALLY when it comes to stroker kits... i wont even use Eagle...

the problem is many of the kits (to keep their products cheep) dont do enough R&D on their product. Impropper stroke to bore ratio, impropper piston material, and improper stroke length of the stroke can cause problems that proper research can avoid.

For example, lateral friction is the friction on the side of the cylinder wall while the piston is going up and down in the cylinder. Improper stroke to bore ratio and improper stroke length can cause this to become fatal to a motor.

(think on the 1000's of an in scale here) imagine the cylinder on a block... its supposed to be perfectly round. every time the piston goes up and down in the cylinder, it scrapes away a TINY bit of the cylinder wall. at 1,000 RPMs thats 60,000 per hour. say you drive 2 hours a day? thats 120,000 times a day. 365 days a year? ... get where im going? and thats JUST 1000 RPMs... lol...

Anyways, this causes the cylinder to change shapes into an oval. this is caused directly by lateral friction. You need to measure your cylinders when doing a motor-rebuild (chiltons tells you the specs that are acceptable.) if the stroker kit is poorly designed, this lateral friction is amplified and this happens much much much faster, but the thing is, that usually when you stroke a motor, you do other things. like N2O, or Boost... with constant presure and extream conditions like that, every minor thing is amplified. ..... . .

thats just one example as well.


go livernoise. tehy make a premium product.


edit: if you want to save a penney, buy a BBK TB instead of the Accufab TB... dont skimp on the internals.

 

[98saleen88]

you make a good piont, but im surpised that you never heard of probe, probably because they are more popular with the 5.0 people.. i looked into livernoise, but anyway we just our 347 from fordstrokers and thats got a probe 347 streetfighter in it and it seems to have good reviews, havent got the 347 running yet, only had it for a bout a week...
http://mustangsunlimited.com/itemdy01.asp?T1=SK46P+01&Category=Engine&subCategory=Stroker+Kits&CatKey=74-01

 

[98mstanggt]

I personally would do the 5.4 swap over the stroker

 

[MustangChris]

+1 on the 5.4.

but props for wanting to stick with a 4.6... gives you some options on mods that the 5.4 doesnt.

 

[EastBayStang98]

i also like the idea of a stroked 5.1 dont they have a 5.o stroker kit for the 4.6 as well?

 

[AaRoN]

every time the piston goes up and down in the cylinder, it scrapes away a TINY bit of the cylinder wall.......

at 1,000 RPMs thats 60,000 per hour. say you drive 2 hours a day? thats 120,000 times a day.

The piston shouldn't scrape anything. The oil ring is the only thing really scraping anything on the cylinder wall (besides the compression rings). The teeny-tiny space between the piston and cylinder wall is the oil clearance.

In order for the one of the pistons in our cars (V8) to go from either TDC to BDC (or vice-versa) the crankshaft has to rotate 180*. Once the crankshaft has turned 720*, each piston has completed it's 4 strokes (4 strokes= 1 cycle). So, for every full revolution (RPM) the piston has gone up and come down (or vice-versa). For every 1000 RPM's there are 500 cycles. If there are 4 strokes in 1 cycle, then how many times has that piston moved up and down in 1000 RPM's over the course of 1 hour? 60,000? Not quite.

 

[MustangChris]

every time the piston goes up and down in the cylinder, it scrapes away a TINY bit of the cylinder wall.......

at 1,000 RPMs thats 60,000 per hour. say you drive 2 hours a day? thats 120,000 times a day.

The piston shouldn't scrape anything. The oil ring is the only thing really scraping anything on the cylinder wall (besides the compression rings). The teeny-tiny space between the piston and cylinder wall is the oil clearance.

In order for the one of the pistons in our cars (V8) to go from either TDC to BDC (or vice-versa) the crankshaft has to rotate 180*. Once the crankshaft has turned 720*, each piston has completed it's 4 strokes (4 strokes= 1 cycle). So, for every full revolution (RPM) the piston has gone up and come down (or vice-versa). For every 1000 RPM's there are 500 cycles. If there are 4 strokes in 1 cycle, then how many times has that piston moved up and down in 1000 RPM's over the course of 1 hour? 60,000? Not quite.

okay okay okay. i completely agree with everything you said. im bad at math. lol. but before we pass me off as a complete retard the rings should be the only thing touching the cylinder walls. when i said "piston" i meant "piston assembly" i figured everyone would assume that there are rings on the piston...

the tiny space between the rings and the walls ARE for oil, but we do not live in a perfect world, and therefore oil doesnt protect 100%. Over time this causes wear and tear (hense the fact that you always at least hone [sp?] your cylinder walls before rebuilding a motor.) an improperly designed stroker kit amplifies the lateral friction, and therefore, the wear and tear on the motor.

thats all i was sayin'

 

[AaRoN]

I was pretty sure that's what you meant but, when it comes to people on forums, you never know...lol.

 

[MustangChris]

lol, very true.

and i thank you for clearifying... i remember one time i wrote something on this thread about different blower set ups... and apparently i had NO IDEA what i was talking about... 94 hellion (i think that was his name) completely pwned me and put me in my place. lol...

its always a good idea to clearify stuff so that we all get a chance to learn accurate information.

 

[AaRoN]

lol, very true.

and i thank you for clearifying... i remember one time i wrote something on this thread about different blower set ups... and apparently i had NO IDEA what i was talking about... 94 hellion (i think that was his name) completely pwned me and put me in my place. lol...

its always a good idea to clearify stuff so that we all get a chance to learn accurate information.

Yeah Craig (94Hellion) is a really smart guy that knows his sh*t. One lesson I've learned about forums is to always make sure that what you're saying is perfectly clear. Otherwise (like I did to you), someone will think you are saying something that you're not or may just think you're a retard that talks out his wahoo...lol

And I agree 100% with you about the stroker kits. Our clearances are so tight, I want to make sure that what is going in my motor is the best I can get.

 

[Dalamar]

I went stroker on my motor build, and really like it.
IMO, the 281 could use a lil more torque down low.

 

[AaRoN]

I went stroker on my motor build, and really like it.
IMO, the 281 could use a lil more torque down low.

And I agree with that too! This is why I'm considering ditching the lightweight flywheel for the stock one.

 

[MustangChris]

I went stroker on my motor build, and really like it.
IMO, the 281 could use a lil more torque down low.

+1 on the L.E.TQ. but the NPIs just completely die on top end... i hit 4k and i might as well shift. lol.

I went stroker on my motor build, and really like it.
IMO, the 281 could use a lil more torque down low.

And I agree with that too! This is why I'm considering ditching the lightweight flywheel for the stock one.

how will that help? just curious. i kept my stock flywheel because the aluminum ones can warp when they get too hot, which is what happens in a dialy driver that does alot of road trips. lol.

 

[Dalamar]

they take more torque to get spinning.

 

[MustangChris]

lol, very true.

and i thank you for clearifying... i remember one time i wrote something on this thread about different blower set ups... and apparently i had NO IDEA what i was talking about... 94 hellion (i think that was his name) completely pwned me and put me in my place. lol...

its always a good idea to clearify stuff so that we all get a chance to learn accurate information.

Yeah Craig (94Hellion) is a really smart guy that knows his sh*t. One lesson I've learned about forums is to always make sure that what you're saying is perfectly clear. Otherwise (like I did to you), someone will think you are saying something that you're not or may just think you're a retard that talks out his wahoo...lol

And I agree 100% with you about the stroker kits. Our clearances are so tight, I want to make sure that what is going in my motor is the best I can get.

yea, he's really smart... it was really embarassing because i THOUGHT i knew EXACTLY what i was talking about.... .. .. lol. and you cant argue with someone when what they say makes 1000% more sence than what you just said. lol.

luckily he was really nice about it. lol. but on the other hand, i was brand new to the site (like 300 posts) and everyone wasnt used to my post-whoring yet... so everyone was yelling at me saying i was just trying to get my post count up and that i didnt know anything about cars... lol. then i wrote a post that was litterally like a BOOK to try and explain boosted applications and i was completely WRONG.

 

[MustangChris]

they take more torque to get spinning.

yea, so wouldnt that rob low end tq by going to a stock flywheel?