420a stroker power gain

[dustyb]

how much power will i possibly gain if i take my 420a engine and put a stroker crank in it? (n/t and after i turbo it)

 

[Justin99RS]

no way anyone can accurately answer that question. each car is different, the only way to know for sure is to do it and get it tuned and dyno it..

another reason is that there is very few people who have actually done a stroker kit. most are now going the cheaper route of doing a 2.4L bottom end off of a stratus and matting it to the 420a DOHC head.

 

[Nitsud]

I havn't ever heard of that. Is that the 4g64 that's in the Spyders?

 

[Justin99RS]

no, its a 2.4Litre SOHC 420a out of a 95-99 dodge stratus or plymouth breeze, a 4g64 wont work.

with minor modding of the pulley system and motor mounts, the DOHC 2.0 420 head will bolt right on to the 2.4l block..and make for one mean bi***.....and in the end cheaper than the 2.19 litre stroker from howell.

 

[Kirby]

Acctually I can tell you... The stroker motor at stock compression would give you 10% more power throught your whole RPM range. Now if you go lower comp on the pistons then you will lose some of that net gain. Now with boost added to the mix (given all things are the same which can't happen in the real world) pound for pound you would be 10% more powerful than the other guy with the 2.0. As for the 2.4L swap I think justin makes it sound a lot simpler than it is. There are several other factors that will cause some issues. Like rotating cam sensors to trick the ECU and there are several others. Bottom line is you have to decide weather it's worth it to go one way or the other.

 

[Justin99RS]

yea, i did make it sound a little easier...but as far as the money standpoint it will be cheaper, which is why people are leaning this way instead of the howell kit.

anyways kirby- you have the 2.2 how does it do for you...you dissapeared from 2gnt a while back...

 

[Kirby]

yea, i did make it sound a little easier...but as far as the money standpoint it will be cheaper, which is why people are leaning this way instead of the howell kit.

anyways kirby- you have the 2.2 how does it do for you...you dissapeared from 2gnt a while back...

It may be a little cheaper depending on how you do it. If it were me I would still be buying all the forged pistons and rods too rather than using the other options that make it a little cheaper. Plus I always factor time and hasstle into my cost comp.'s. I love my howell engine it performs well for me. I'm still on 2gnt all the time I just don't start many topics as I don't really have any new issues or news going on with the car. Plus most of the ?'s are answerd before I get into the thread, which is acctually a good thing..... My money has been REAL tight lately so I havn't been able to get to a dyno like I had planned, and there are still a lot of things that I'm looking to do to really make more than 18psi on the street. But I'm still here and still around and I can't wait for my cash to build up a little bit and show some serious results...

 

[aliczander]

The 2.4L.... ah yes, not to be confused with the Mitsu 2.4L (engine code 4g64). It's not as easy as it sounds and to prove my point, the engine only has 4 motor mounts so if you have to do something with "some" of them, you mean more than one. If you mean more than one then you mean half or more. It's a PITA.

Next, the 2.4L has balance shafts on the bottom that stick down about 4 inches below the oil pan gasket line. The oil pan on the 2.4L is alot larger as well to accomodate these balance shafts. So you've got to do away with them. This is not a good thing unless you fork over some serious money to have the engine balanced and blue printed. Reason being is that the balance shafts elimate/reduce vibrations. Take them out on an un-balanced engine and you've got alot of vibration and the engine will shake itself to death.

After that you have to deal with injectors. Something funky about them is that number 1 injector is no longer number 1. It's four or something strange like that.

If you get past all that then you still have to deal with more fitment issues. The hole engine is about 1/2 or 1" taller than the 420A. Fitment again.

It's not impossible but it's not something that just anyone can undertake. The neons can do it pretty easily. They've got more room in the engine bay and it's not really an issue.

Bottom line, you and I both have a long way to go before either of us should try and under-take this little adventure

 

[DSM-ZERO]

The passenger side motor mount doesn't work, you will need a bracket made

the lower water pipe will need to be creatively held to the block, since the bolthole doesn't bolt up right

the dipstick will need to stick between header runners 2 and 3. Check the oil on a cold motor only

oil pan doesn't work well with the exhaust. Can be modified by cutting support ribs to make work with the crossmember, but for the exhaust, I am at a loss. Custom pan necessary

PT Cruiser alternator bracket works (can't remember the belt size)

must use underdrive pulley

recommend sandwich adaptor and oil filter relocation due to crappy location

custom ps and sc brackets need to be made, as well as a way to tension the belt

starter requires some notching of the bracket that holds the lower water pipe in order to bolt it to the transmission

the 4 corner head bolts must be from a 2.4, not a 2GNT, as the 2GNT corner head bolts (4 of them) are too short to meet the threads in the 2.4

2.4 oil pan gasket is needed

the main seals from the 2.4 are different then the 2.0

I recommend removing the balance shafts. They are on the bottom of the bedplate and can be removed by pulling 4 bolts and cutting the drive chain. There is now an oiling hole that must be blocked. I recommend tapping it and screwing a bolt in there, using red loctite

I also recommend baffling the oil pan if you remove the balance shafts. there is now a 6.5 qt. capacity in the pan which is too easy to slosh around.

2.4L valve cover doesn't fit well. Not sure if silicone sealant would fix this or not.

2.0 sensors (oil pressure, knock, and crank angle sensors) must be used. The 2.4 sensors don't fit the harnesses. Must get creative on knock sensor placement.

coil pack must be rewired: switch the outside wires

cam position magnet must be removed, the location nipples filed off, and replaced, turned counter clockwise 90 degrees.

Injectors must be rewired, move 4-3, 3-2, 2-1, 1-4.

This is all that I can think of off of the top of my head. I would not recommend this swap to my worst enemy.
-=B-=
This was given to me by the1bill GOOD LUCK WITH THIS SWAP

 

[black9d1tsiawd]

no, its a 2.4Litre SOHC 420a out of a 95-99 dodge stratus or plymouth breeze, a 4g64 wont work.

with minor modding of the pulley system and motor mounts, the DOHC 2.0 420 head will bolt right on to the 2.4l block..and make for one mean bi***.....and in the end cheaper than the 2.19 litre stroker from howell.

and dont forget the sebring ;-)

 

[Ryans99OZ]

so would a 420a 2.4L stroker make more power than a 2.4L 4G63?...i drive my bro's spyder n/t all the time and its no faster than my car.....both cars are 1999 too

 

[GSGoinFast]

so would a 420a 2.4L stroker make more power than a 2.4L 4G63?...i drive my bro's spyder n/t all the time and its no faster than my car.....both cars are 1999 too

thats not a 4g63. its a 4g64. similar to the 4g63, except it only has a SOHC instead of DOHC. the DOHC can be mated to it with a little fabbing. it only make 141 crank hp because of it. so your car should be a little bit quicker due to it being a little bit lighter. its also used in the 3g low model eclipses, but it puts out 154crank hp.

 

[JWoodley]

so would a 420a 2.4L stroker make more power than a 2.4L 4G63?...i drive my bro's spyder n/t all the time and its no faster than my car.....both cars are 1999 too

the 2.4l 420a isnt a stroker, its just a larger motor. (deck height is between 0.5-1.0" taller..)

the 2.2l is a stroker as it uses a custom crank.

i plan on punching my 2.4l block .060 over and running a 2.5l

to each his own. things take time.

 

[DSM-ZERO]

One guy on 2gnt stroked and bored his 2.4 motor to a 2.6

 

[ninjai_ruken]

Damn I just rebuilt my motor from the bottom up and put a turbo kit on....the coversion for the 2.4 bottom sounds like it would be a different project but I like my car. And as of right now my dad and I are talking about a AWD 420A-T that would be a awsome project car

 

[dr1665]

One guy on 2gnt stroked and bored his 2.4 motor to a 2.6

Yeah. And he had ARD do the hack job, er work for him. Lots of issues with that car. It ran no better than the other turbo 420as at the Shootout. A guy bought it in Wisconsin. Good guy and he's planning on redoing a lot of things. Funny thing is, I swear it sounded like a Subie with exhaust at WOT on the highway. "Shamu" (as the car was once called) drove with us all the way from Norwalk to Chicago. Good times.

Come to the Shootout next year and you might get to see it.

 

[DSM-ZERO]

When and where is the DSM shootout I always plan on going maybe I'll make it this year and maybe my motor will be stroked by then also