Destroker kit, want to know all!
 

I just recently heard about a destroker motor for a dsm. I've been trying to find out some info about them, but can't seem to find a solid source of info. From what I understand, they're 4g64 blocks with 4g63 cranks and come out as a 2.1l motor. It's also my understanding that they rev around 10,000rpm, with an appropriately built head.

What I want to know are details, what piston/rod combos are used? Also if anyone on the site has had any experience with them. I like the idea of a real high revving motor, and just want to learn a bit more about them.

Re: Destroker kit, want to know all!
 

They utilize a 4g64 block, 4g63 crank, 156mm rods (Manley used to make a 6 bolt version that was recently discontinued, we are looking at having our rods produced in this length), and 2.4l pistons. The rod ratio is great and you get a bump in displacement, its the best of both worlds :)

Re: Destroker kit, want to know all!
 

What components should be use in the head? I'm guessing it's gonna have to be built, do to the high revs.

Re: Destroker kit, want to know all!
 

Yeah dual or beehive valve springs and lightweight everything would be a must for 10k plus...

Re: Destroker kit, want to know all!
 

Great concept, but good luck shifting at those speeds.

Re: Destroker kit, want to know all!
 

Buschur is selling these now, pretty bad-ass setup IMHO. My question is are there any weird issues with install? It uses a different water pump than the 4G63, but what else? Standard timing belt? Etc.

The most attractive thing about these for evo owners is the price. THe 4G63 evo core is EXPENSIVE to replace if you blow a hole through the block. Getting 7-bolt 4G64 thats suitable is cheap...buschur is selling their 2.1's for like $4k even, no core required (standard core for evo block is like $1800, and $700 for the crank). That is a freaking sweet deal if you make some windows with your rods.

These are not new though, idk what's stopped people from using them more before now. AMS has used them in their drag car for a few years, and I know QPR was building one back in the day. Perhaps its the custom rod length? Stock is 150mm (I think) so they're a tish longer for this setup.

MAP, you should offer these in your evo lineup ;) I LOVE my stock motor, but should something happen to it...these look tempting for all the right reasons.

Re: Destroker kit, want to know all!
 

There's a big snag. But if you're not concern about 9k+, these seem like a great drop-in replace a carnage-induced motor

Re: Destroker kit, want to know all!
 

We're building a few of them for stock actually, but 6 bolt applications :( 7 Bolt is actually easier as Manley does make the 156mm rod for them still. I guess I'm not familiar with the differences between water pumps and such though, but it makes sense since the block is out of an early 200X Eclipse I believe...

Re: Destroker kit, want to know all!
 

Good luck shifting or having a head that will breathe at 10k.

If you want to rev to 10k, get an S2000.

Re: Destroker kit, want to know all!
 

my buddy had a civic hatch wit a B18c5 motor tha went to 13k but had an issue with tryin to push 14k

Re: Destroker kit, want to know all!
 

Funniest thing I've heard all day!!

Video of said car please :D

Re: Destroker kit, want to know all!
 

That was another thing I thought about. Maybe a built auto to go along with a destroker? I'm not planning on building one anytime soon, just trying to get to know all of the options "just in case". I wanna see some numbers on these motors.

Re: Destroker kit, want to know all!
 

B18c5 is a type r if I'm not mistaken. I know they rev to like 9k easy, but 13k damn...

Re: Destroker kit, want to know all!
 

This stuff isn't new, Marco's been building 2.1's since 2001. And there's actually quite a few people running past 10k on various DSM motors, pretty much anyone in the 9's or better, which these days is a lot. And our heads flow plenty for 10k usage with mild work. You should see what it takes to get a stock 350 Chevy head to flow anywhere near what ours will.

Re: Destroker kit, want to know all!
 

mmmm the car blew up? thats why 14 was a problem dropped a valve n that was the end of that motor

Re: Destroker kit, want to know all!
 

In fact, we all know someone running a stroker past 10k with a 2G head. DSM heads are not a restriction.

Re: Destroker kit, want to know all!
 

I never said any of this is new, i just think its silly to want to rev so high in a street car just for the sake of it.

None of us are rau or shep, and i'm fairly certain they are running 2.0s anyway.

Re: Destroker kit, want to know all!
 

Rau and Shep both run 2.0's, Kiggly runs a stroker

Re: Destroker kit, want to know all!
 

Info taken off of DTuners, credit Delta448

Delta448 posted this in another 2.2 thread

The formula for displacement is 3.1415 * (bore/2)^2 * stroke * number of cylinders.

Using an 88mm (stock 2.0L) crankshaft:
85mm bore = 1997cc
85.5mm bore = 2021
86mm bore = 2045
86.5mm bore = 2068
87mm bore = 2092
87.5mm bore = 2116
88mm bore = 2141
Rod Ratios: stock piston and 150mm rod = 1.70
stroker piston and 156mm rod = 1.77
stroker piston, 2.4 block, 162mm rod = 1.84


For a 92mm Magnus crankshaft:
85mm bore = 2088cc
85.5mm bore = 2113
86mm bore = 2138
86.5mm bore = 2163
87mm bore = 2188
87.5mm bore = 2213
88mm bore = 2238
Rod Ratios: stock piston, 148mm rod = 1.61
stroker piston, 154mm rod = 1.67
stroker piston, 2.4 block, 160mm rod = 1.74


For a 94mm Eagle crankshaft:
85mm bore = 2134cc
85.5mm bore = 2159
86mm bore = 2184
86.5mm bore = 2209
87mm bore = 2235
87.5mm bore = 2261
88mm bore = 2287
Rod Ratios: stock piston, 147mm rod = 1.56
stroker piston, 153mm rod = 1.63
stroker piston, 2.4 block, 159mm rod = 1.69


For a 97mm Crower crankshaft:
85mm bore = 2202cc
85.5mm bore = 2228
86mm bore = 2254
86.5mm bore = 2280
87mm bore = 2306
87.5mm bore = 2333
88mm bore = 2360
Rod Ratios: stock piston, 145.5mm rod = 1.5
stroker piston, 151.5mm rod = 1.56
stroker piston, 2.4 block, 157.5mm rod = 1.62


For a 100mm (stock 2.4L) crankshaft:
85mm bore = 2270cc
85.5mm bore = 2296
86mm bore = 2323
86.5mm bore = 2350
87mm bore = 2378
87.5mm bore = 2405
88mm bore = 2433
Rod Ratios: stock pistons, 144mm rod = 1.44
stroker pistons, 150mm rod = 1.50
stroker pistons, 2.4 block, 156mm rod = 1.56


For a 102mm Crower crankshaft:
85mm bore = 2315cc
85.5mm bore = 2342
86mm bore = 2370
86.5mm bore = 2397
87mm bore = 2425
87.5mm bore = 2453
88mm bore = 2481
Rod Ratios: stock piston, 143mm rod = 1.40
stroker piston, 149mm rod = 1.46
stroker piston, 2.4 block, 155mm rod = 1.52


For a 106mm Crower crankshaft:
Crower states the 106mm crank must be used in a 2.4L block, stock 2.4L bore is 86.5mm.
85mm bore = n/a
85.5mm bore = n/a
86mm bore = n/a
86.5mm bore = 2491cc
87mm bore = 2520
87.5mm bore = 2549
88mm bore = 2579
Rod Ratios: stock piston, 2.4 block, 147mm rod = 1.39
stroker piston, 2.4 block, 153mm rod = 1.44

Re: Destroker kit, want to know all!
 

Wow, with that 106mm crank, we're almost to the 2.7L that Crankwalker promised us years ago. :tongue:

Re: Destroker kit, want to know all!
 

Ha.

I also agree with taking shifting into consideration. Having a high revving motor might seem cool, but being able to shift at that high of an RPM will be something you'll have to take into consideration. That's one thing that attracts me to strokers. Oh well if I can't rev as high, I make up for it in bottom end torque, and don't have to worry about high RPM shifting.

Re: Destroker kit, want to know all!
 

^my thoughts exactly if you setup isn't gonna make power to 9k+ why hold a motor to do it? ESP for a street car.
Have u heard about using stroker pistons in reg 2.0 to get better rod ratio because of the relocated pin height?

Re: Destroker kit, want to know all!
 

You'd have to use correspondingly longer rods as well.

Re: Destroker kit, want to know all!
 

So, any weirdness with install that anyone would know since its a 4G64 block? Didn't the 2.4 guys have to re-mark their cam gears and use a different tbelt or something?

Re: Destroker kit, want to know all!
 

Timing belt and cam gears from 1995 DOHC Galant I believe, might be 1994, but again this applies to the 6 bolt stuff only. However, you can use the 4g63 belt and cam gears if you degree them ;)

Re: Destroker kit, want to know all!
 

I just happen to know a certain someone with a set of those DOHC cam gears laying around. :wink:

Re: Destroker kit, want to know all!
 

Where can one find these off the shelf custom rods?

Re: Destroker kit, want to know all!
 

As of right now you can't find 6 bolt anywhere as they are no longer mass produced by anyone that I am aware of. 7 Bolt rods are still being made in the 156mm length by Manley, and you can find them from this guy ;)

Re: Destroker kit, want to know all!
 

So what t-belt do you need to use for the evo application? And what cam gears, those same 2.4 ones?

Re: Destroker kit, want to know all!
 

Magnus has the parts and can build you one of these motors as well. It was something I was looking into for a little bit, but a cheap set of eagles and off the shelf pistions seemed like a lot cheaper and easier option. They do sound and seem pretty bad ass though.

Re: Destroker kit, want to know all!
 

The Magnus route is a tad bit expensive.

Re: Destroker kit, want to know all!
 

2.14 in general is expensive.


It would be sweet in a light wieght, high revving, auto'd FWD though

Re: Destroker kit, want to know all!
 

That's what bothers me as it really shouldn't be, there is no additional machining and the only "custom" piece is the connecting rods. Like I said we will have 156mm length rods in the near future and they will be very cost effective ;)

Re: Destroker kit, want to know all!
 

^ Let us know when.

It would then come down to a 63 7-bolt or 64 6-bolt 2.2l build, for myself anyways.

Re: Destroker kit, want to know all!
 

I was also considering this when I built my 2.4. At the time I did not have a tranny that could shift that high so I scrapped that idea. Still would like to do one some day.

Cost would be about the same as a built 2.0. The only additional cost for most people would be a 2.4 block. Just find a friend that wants to do a 2.3l and then buy a 2.0 motor and a 2.4. swap cranks and you have a 2.1 and a 2.3

Re: Destroker kit, want to know all!
 

2235cc is what I'd be shooting for... 94mm eagle crank with either 156rods / -3 pistons or 159rods / -6 pistons in a 64. This will be my fall (winter) build.