FM stroker alternative?
#1
Senior Member
Thread Starter
iTrader: (2)
Join Date: Nov 2007
Location: Saint Paul, MN
Posts: 1,489
Total Cats: 28
FM stroker alternative?
Does anyone know if someone has tried to put together a cheap alternative to the FM stroker design? I'm sure the biggest issue is the crank, since it's a custom design and can't be cheap.
#5
This is the cheap option. If running a non-miata block is an option.
Isnt there some other company that has a stroker setup? But under 5k? Good luck even getting a standard boost build for that cheap if you're paying someone for assembly.
There's always DIY, have a stock crank offset ground (my gut says 4mm is a lot though), and find an off the shelf rod with the new correct big end diameter to at least order bearing from, maybe it'll be the right length, else you'll be ordering custom, and get custom pistons.
Isnt there some other company that has a stroker setup? But under 5k? Good luck even getting a standard boost build for that cheap if you're paying someone for assembly.
There's always DIY, have a stock crank offset ground (my gut says 4mm is a lot though), and find an off the shelf rod with the new correct big end diameter to at least order bearing from, maybe it'll be the right length, else you'll be ordering custom, and get custom pistons.
#7
Senior Member
Thread Starter
iTrader: (2)
Join Date: Nov 2007
Location: Saint Paul, MN
Posts: 1,489
Total Cats: 28
I figure I can do all the work myself. I have everything except transmission tools, I just figured someone may have already done the legwork. Sadly, a search has turned nothing up so far..
#9
you could get some custom rods from someone that is not carrillo for cheaper, and maybe talk to moldex directly about the crank, and you can get the same pistions from weisco directly without the FM tax. maybe be able to get it for 4500.
IMO the .2L of displacement doesn't justify the 5k. You are never gonna break the stock crank. No one on this forum is going to break the stock crank ( with proper tuning). You dont need a billet crank untill you start breaking 650hp maybe even 750.
And what are you gonna gain ? an extra 25-50 ftlbs? For 5 grand its not worth it.
IMO the .2L of displacement doesn't justify the 5k. You are never gonna break the stock crank. No one on this forum is going to break the stock crank ( with proper tuning). You dont need a billet crank untill you start breaking 650hp maybe even 750.
And what are you gonna gain ? an extra 25-50 ftlbs? For 5 grand its not worth it.
#11
yYou are never gonna break the stock crank. No one on this forum is going to break the stock crank ( with proper tuning). You dont need a billet crank untill you start breaking 650hp maybe even 750.
And what are you gonna gain ? an extra 25-50 ftlbs? For 5 grand its not worth it.
And what are you gonna gain ? an extra 25-50 ftlbs? For 5 grand its not worth it.
The gain is more for the spool. The other turbo miata I've driven has an FM stroker and a disco potato on an FMII setup, it feels like the turbo really isnt there. I havent tuned my boost control enough to really see if 'stroker 99-00 + normal turbo' is better than VVT + EFR. My gut says the better turbo and VVT is going to be better than the stroker, at the very least I will be winning in the transients.
#12
McCully Racing Motors- Don't want a V8? How about a 2.0?
Still have yet to hear of anyone actually running one though.
Still have yet to hear of anyone actually running one though.
#16
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,103
Comparing a sleeved BP block to a Honda block is just stupid. The Honda block is an open deck aluminum block, while a sleeved BP would still be a closed deck iron block.
#17
Elite Member
iTrader: (8)
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,910
Total Cats: 51
I agree with the boring via sleeving. If the sleeving is done properly there shouldnt be any issues with it.
The fact being that increasing the displacement via bore will allow you to keep some of the engines desire to rev out like its stock but give you more power. I realize that longer stroke generally means more torque lower in the rpm range, but I prefer to have similar engine behavior to stock. once boosted the difference gap in power becomes more of a moot point.
If i were looking for more displacement for the right reasons, this would be my first choice vs a stroker or offset ground cranks. You could likely have someone sleeve it without it being the guys in the above link for cheaper. You would just have to do some leg work in sourcing some sleeves of the proper material and finding a shop thats both willing and competant enough to do this work.
Check out this thread on honda-tech to see how sleeving works in the open deck hondas.... its more or less the same process for all engines, but there would be less to worry about with the closed deck design.
Block Sleeving and parts fabrication - Honda-Tech
The fact being that increasing the displacement via bore will allow you to keep some of the engines desire to rev out like its stock but give you more power. I realize that longer stroke generally means more torque lower in the rpm range, but I prefer to have similar engine behavior to stock. once boosted the difference gap in power becomes more of a moot point.
If i were looking for more displacement for the right reasons, this would be my first choice vs a stroker or offset ground cranks. You could likely have someone sleeve it without it being the guys in the above link for cheaper. You would just have to do some leg work in sourcing some sleeves of the proper material and finding a shop thats both willing and competant enough to do this work.
Check out this thread on honda-tech to see how sleeving works in the open deck hondas.... its more or less the same process for all engines, but there would be less to worry about with the closed deck design.
Block Sleeving and parts fabrication - Honda-Tech