Big bore/stroker kit.

[Cool Guy07400EX]

Can you combine say a 430 bore and the hot rods +4mm crank to make a stroker/big bore? If not, is there any other way to combine a stroker kit with a big bore?
What all would I need and would I have to run race gas? Also, I don't know much about stroker's, as you can probably tell, so what is the diffrence between stroker's and bore's??

[m36indiana]

i run a 440 with a +4mm stroker, which makes it a 460. it has tons of power an pulls through all gears

[DementeD]

how does that 460cc work? any heating issues..

can u use the stroker on a smaller piston size? ie 416/426

[m36indiana]

yes you can use a stoker on anysize piston

[drew416ex]

First you need to fugure out how much you are willing to spend. You may be better off with a big bore instead of a stroker.

[drew416ex]

Originally posted by Cool Guy07400EX
Can you combine say a 430 bore and the hot rods +4mm crank to make a stroker/big bore? If not, is there any other way to combine a stroker kit with a big bore?
What all would I need and would I have to run race gas? Also, I don't know much about stroker's, as you can probably tell, so what is the diffrence between stroker's and bore's??

You can put any piston with it as long as the wristpin hole is moved up or the crank has a shorter rod. The hot rods has a stock length rod so you have to get a piston with the wristpin hole moved. If you send the stock crank to poweroll to get it stroked and they install their shorter rod, then you can use any piston made for the 400. Strokers increase engine size by making the piston move farther up and down in the cylinder. Bore increases piston size. With personal experience strokers make much better power than bore motors, but cost quite a bit more. I have a 440 stroker by the way. 87mm piston and a 4mm stroker crank.

[Cool Guy07400EX]

Originally posted by drew416ex
You can put any piston with it as long as the wristpin hole is moved up or the crank has a shorter rod. The hot rods has a stock length rod so you have to get a piston with the wristpin hole moved. If you send the stock crank to poweroll to get it stroked and they install their shorter rod, then you can use any piston made for the 400. Strokers increase engine size by making the piston move farther up and down in the cylinder. Bore increases piston size. With personal experience strokers make much better power than bore motors, but cost quite a bit more. I have a 440 stroker by the way. 87mm piston and a 4mm stroker crank.

How much more are you talking? Power and price? Also does it run alot hotter?

[Wheelie]

This is my 3rd year on a Powroll 440 stroker--killer setup. The crank work/HD rod and piston was about $800 IIRC.

I haven't noticed the engine running any hotter than it did before.

The power is about the same as a pipe/filtered 450 with a lot more low end. One of my buddies has a 05' 450R with full exhaust, K&N Filter w/o lid, hot cam stg1 and a 12 tooth front sprocket. We are dead even in a drag race through top end, he is about 40lbs heavier than me though.

[Cool Guy07400EX]

Originally posted by Wheelie
This is my 3rd year on a Powroll 440 stroker--killer setup. The crank work/HD rod and piston was about $800 IIRC.

I haven't noticed the engine running any hotter than it did before.

The power is about the same as a pipe/filtered 450 with a lot more low end. One of my buddies has a 05' 450R with full exhaust, K&N Filter w/o lid, hot cam stg1 and a 12 tooth front sprocket. We are dead even in a drag race through top end, he is about 40lbs heavier than me though.

Does that setup run on race gas?

[Wheelie]

I actually run pump gas everywhere except the sand dunes. I run roughly 50/50 at the dunes, because of the lower elevation/engine working harder and the engine running hotter while drag racing/doing hillclimbs.

[Cool Guy07400EX]

What size piston do you have? And compression?

[TRXRacer1]

www.powroll.com

[Cool Guy07400EX]

Well what would the total price be for the 440 stroker from powroll and how much would a 430 bore cost? Also what would the diffrences in power be?

[TRXRacer1]

Originally posted by Cool Guy07400EX
Well what would the total price be for the 440 stroker from powroll and how much would a 430 bore cost? Also what would the diffrences in power be? Check out the link for prices. ^^^

[blue_ex_rider]

There is a brand new crank on here stroked by powroll that a member has for sale Isay you could get it pretty cheap he also has a 440 pistion and cylinder.

[Wheelie]

Originally posted by Cool Guy07400EX
Well what would the total price be for the 440 stroker from powroll and how much would a 430 bore cost? Also what would the diffrences in power be?

I've never ridden a 440 big bore, so I can't give a fair comparison. All I know is that my stroker has been very reliable and fast.

I did my own tear down and assembly. Including gaskets, headwork, cam, crank/rod/piston, timing chain and misc stuff I have about $1350-1400 into my engine. I did go with the HD rod through Powroll which was and extra $200 or so, cheap insurance to know that the bottom end would be bulletproof.

It's a 416 piston (87mm) with the skirt modified by Powroll to clear the crank throws. You can't simply buy a piston and install it with this crank, it needs to be modified slightly to work. Compression is about 11.5:1

[2muchquad]

big bores run better,they wind up faster,bottom line.Theres a reason honda decreased the stroke and increased the bore on the 450r starting in 06 to pres.:muscle: Strokers make good torque but the 400ex already has plenty,you'll be left in the dust with a stroker motor.let the flaming begin:D

[Wheelie]

I'll put my stroker up against a 440 big bore any day of the week.

[drew416ex]

Originally posted by 2muchquad
big bores run better,they wind up faster,bottom line.Theres a reason honda decreased the stroke and increased the bore on the 450r starting in 06 to pres.:muscle: Strokers make good torque but the 400ex already has plenty,you'll be left in the dust with a stroker motor.let the flaming begin:D \

Thats not true. A stroker motor built correctly will rev just as fast as any bore motor as long as you keep the piston size down which is why many use a 87mm. My 440 stroker revs just as fast and faster than many bored 440's. Hate to say it but I havnt been left in the dust since Ive built this motor. Sorry if you havnt seen a good stroker built. Im with wheelie, bring on the 440 big bores.

[drew416ex]

Ive come to the conclusion after reading hundreds of threads that many people write on threads in which they have no clue whats going on just to piss people off.

[2muchquad]

Ive come to the conclusion after reading hundreds of threads that many people write on threads in which they have no clue whats going on just to piss people off.

And somebody ALWAYS takes the bait:D

[drew416ex]

Originally posted by 2muchquad
And somebody ALWAYS takes the bait:D

I know it. I get all worked up and then realize I shouldn't even bother, but by then its too late and they already got me. :huh

[Cool Guy07400EX]

Hmmm...intersting. Haha! Well i dont really have enough money for the stroker now that I look at it. I mean I might have money in the future but I'm not too sure if i want to pay that much so im gonna end up going with a 426 or a 430 bore. Maybe wayyyy down the road I'll say It's time for a stoker! Haha. But as of now i also don't want to run race gas and I dont want 11.5:1 compression just because sometomes you might have to use race gas. Thank you for all the info though!!:D

[drew416ex]

If you are just doing a bore motor stay with a 416 or lower. A 416 built right will hang with 440s. Get a good cam, and port job and you will be right next the majority of them.

[drew416ex]

If you are just doing a bore motor stay with a 416 or lower. A 416 built right will hang with 440s. Get a good cam, and port job and you will be right next the majority of them. Plus it gives you the option to do another bore later on down the road. Once you go over 426 you have to resleeve.

[2muchquad]

Yeah i'll probably end up doing soemthing along those lines.Eventually i'll end up with the 440 but for now,i would hate to hog out my virgin stock original bore cylinder:) Still undecided on compression ratio though,the ol'skool in me tells me compression is where you make your power but race gas ,head gaskets blowing and increased wear and tear on the bottom-end along with higher temps are making me reconsider otherwise.I may just go with a 11 1/2 to 1 or so,gotta make some power.A 400ex even with over size valves and porting doesnt have no where near the breathing capacity of the 4 fiddys with huge heads so we have to look at compression,decision decisions:confused:

[Cool Guy07400EX]

Originally posted by drew416ex
If you are just doing a bore motor stay with a 416 or lower. A 416 built right will hang with 440s. Get a good cam, and port job and you will be right next the majority of them. Plus it gives you the option to do another bore later on down the road. Once you go over 426 you have to resleeve.

I thought you could a 430 and still have room for another overbore later. Here is a what TRXRacer1 told me on a diffrent thread:

Originally posted by TRXRacer1
What I would do is get the oversized sleeve, a Cometic 440 gasket kit, re-anchor your head studs by installing inserts in your cylinder, have a JE 10.8:1 88.5mm piston fitted and call it a day. You'll be at a 430 instead of a 435 (440 kits are 435cc) and you'll have room for another overbore if needed later. I doubt you'll feel a difference between 5cc and it's free insurance. You can certainly run that cooler plug too, it won't hurt a thing and might help a little.

[2muchquad]

that is true,there are 88.5mm piston kits but you'll need to resleeve.You can go to a 426 with the stock sleeve,any bigger and it gets too thin.Thats why a 416 and the option of a 426 later on when its time for a rebuild makes sense,the options are endless;)

[Cool Guy07400EX]

So then if I did the 430 bore with the 88.5mm piston then I could do another over bore later? To like a 440?

[2muchquad]

correct,you have the option of the 89mm bore later on

[Cool Guy07400EX]

Alright, thanks man.:)