How much HP can my stock RS engine handle?

[TDQuiksilver]

I've called up a very reliable local shop.. and apparently he can cut me a deal for the Star Stage 2 kit for $1,500! No joke.. I'll go check it out once he has it in, but hell, if the parts are in great shape (or brand new even - which they should be) then that's a hell of a deal. Can't wait.

 

[Strictlyimports]

WHAAAAAAAAAAAAAAAAAAAAAAAAAAT $1500 ???
are u for sure its stage 2 ????

 

[98Turbbo420A]

BS!!!!!!

 

[TDQuiksilver]

Nah, seriously.. no lies, no BS.. went down yesterday and checked out the entire kit.. had all the correct parts, brand new.. apparently they arent selling as well as they had hoped and are trying to "get rid of them"..

 

[Strictlyimports]

it cant be the 2nd stage thats the first thing and second of all what are u saying about not selling well lamoo bro was that a joke ?

 

[TDQuiksilver]

Whatever you say.. "lamoo"..

 

[Sqad_7]

I got a 95 RS and I want to do a engine swap but I figure that I would have to buy the engine then buy mounting equip. But if I can't get that I want to put a Stage 2 hahn racecraft turbo in it. Keep in mind this is a car with high miles. What would be better?

 

[mike250]

Originally posted by Sqad_7
I got a 95 RS and I want to do a engine swap but I figure that I would have to buy the engine then buy mounting equip. But if I can't get that I want to put a Stage 2 hahn racecraft turbo in it. Keep in mind this is a car with high miles. What would be better?

for the swap you might spend close to 7k where as doing the kit with upgrading the internals you looking at spending 4-5 AND have better internals

machv.com has more info if you really want to do the swap

 

[mike250]

Originally posted by TDQuiksilver
Nah, seriously.. no lies, no BS.. went down yesterday and checked out the entire kit.. had all the correct parts, brand new.. apparently they arent selling as well as they had hoped and are trying to "get rid of them"..

if he still has any lemme know!!

 

[Doug99RS]

So like... it's been 4 months since the engine was built... Lo eclipse... how much are we up to? Oh... and you said your engine rebuild was costing you almost nothing. Just parts and labor. Um... what else is there?

 

[Doug99RS]

Oh... is this knife edged or not? I'm thinking no. It's my block from the neon

 

[racer_rus]

im new here and i have no right to say this, but a 300 hp all motor car with 8.8 : 1 compression with no turbo and no nos (all motor) in a 420 a is imposible, unless....you buy two and weld them together and reman the crank!!! ill give you above 200 no prob but i have done this for years, started building non turbo 420 a in 1995, you can do all you want but with that compression ratio and i realize that you did that so you could add a turbo and i give you props sounds like you are doing a good thing and probably building one h e double hockey sticks of a motor but face the facts, it is dificult to get 400 hp out of a chevy v 8 with only motor work that can be done in a family owned shop, now cut the cylinders in half (4) and lower your compression down to 8.8:1 instead of 12 :1 run regular super unleaded in it and lower your lift and duration on your cams, hmmm mabee 250 if you ripped everything but the block and replaced it with ALL RACE EQuipment ...sorry bro, im not doggin i just know this motor like i know the curve in my penis .. bolt on a turbo, supercharger, or nos and you might have something

this is my FULL Race engine before the turbo upgrade , 280hp on a dyno
and it has had 8,000 dollars worth of parts inside it, including titanuim rods,port polish,deck, throtle body,aem comp venom fuel rail, injectors,
edelbrock intake, 80 shot Nos wet, aem cam gears, crower stage 2 cams, ....need i continue????

 

[TDQuiksilver]

Yeah, there's this thing we call a car wash

 

[racer_rus]

who cares what the paint looks like ..hehe its better when the piece pf s*** looking thing blows away a camaro or any v8... you think that is bad you should see the holes where the door handles used to be... h*ll i dont even bolt the hood on...hahahah..... not really that is during the paint process... infact i was fiberglassing the fat body kit on it and it for somereason struck me to take a picture of the motor??? your right though it is pretty dirty...ill put up a beter one when i am finished with the paint....

 

[BodyRage85]

Yeah i have a 1992 rs and im considering a turbo on it.....was wondering if there is a way to get rid the MAS so i can bolt on a 2.0 performance intake to run the blow off valve to.

 

[JONB7777]

can someone answer how much a rs/gs engine can handle before u need to replace internals??? id like to know....

 

[Turbo 420a]

Originally posted by JONB7777
can someone answer how much a rs/gs engine can handle before u need to replace internals??? id like to know....

As would I.

The only reputable quote I know of is:

"We found the engine quite safe in stock form up to 300 hp. In testing, a stock engine failed at 350 hp." - HRC

Anyone have any other real knowledge of the stock 420a limits?

 

[BodyRage85]

now another good question is how much hp can a stock rs trans hold cause if the motor can handle 300 the trans cant handle that much i dont think.

 

[racer_rus]

ok as far as internals the actual break down point is mostly the connecting rods. while the stock rods are quite strong and can handle about 300 to 325 hp easily , all the research i have done states that the rods will likely break around 340 + hp. as i always recomend to anyone is that when changing pistons rings or overhauling if it is in the budgett to change the rods to a higher strength rod i mean if your already in there and you build it bullet proof you dont have to worry about it. as far as the tranny... automatic... forgetaboutit..i would say 2 weeks if your lucky ... manual with a heavy duty clutch .. should be ok into the 300 hp range being that the designers use the brains when the build then and think that most people buy manual tranny cars like to drive and dive hard. I would wory about the cv joints more than the reanny...but i have rambled enough so let me get to the point.

300 hp is a great goal. i admire all people who strive to shave even a second off of their time . but chances are that if you are gonna build a 300+ hp dsm 420 a chrystler motor, your gonna spend some cash, in doing so

1 you should never take chances with i bought xxx brand pistons 400 dollars a set and xxx brand cam gears and cams and underdrive pullys nos tubo but i left the stock rods.....hmm sounds funny huh,,, must not be right then

2 if you have the money to build this chances are you have 700.00 + more to buy some better rods...

i hope that this helps answer your questions. happy building!!

 

[Strictlyimports]

as far as the tranny... automatic... forgetaboutit

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[BodyRage85]

yeah level 10 trans are really good im thinking about taking mine down to em and having do a couple of things to em
anyone know of bigger gears out of different cars that will fit in a 92 rs trans?

 

[Doug99RS]

Um.... I don't know what it is about all the people doing "rebuilds" that makes them think they are going to get a significant amount of hp out of it.

I know it's already been said somewhere either in this thread or in another one where someone made some ungodly claim about what it's going to be when done. But that person rebuilt the engine several months ago and has yet to post about their horsepower now. Why? Because they HAD to have been so far from what they claimed that they were too embarrassed to post the truth.

All you're doing in a bottom end rebuild is putting stronger parts in, maybe moving the compression a little one way or the other, putting in balanced rods and pistons, and maybe replacing the crank for one that increases the stroke and might have been balanced. Other than that there's not alot more. And i got to tell you... you're not going to get more than about 50-100 crank horsepower AT THE MOST out of the bottom end. Much less at the wheel.

Now forget I just said all that if your feelings got hurt because I, as well as many others, call you out on it. And just do this. Say what you're doing with the engine, advertise who's doing it if you want, tell us what parts are going in to it and why. Save the estimates because no one is going to beleive you. There's no dyno sheet being printed out while your block is on the engine stand. You'll find it much easier to get people to beleive you have x amount of horsepower when you have a dyno sheet to back it up.

 

[Ryan_Hes]

If tuned *perfectly* the 420A can handle ~300hp.

Why do people put stronger internals in? I'll be brief...

Running an HRC or STAR turbo kit, stock internals can only handle roughly 8psi...any more and you will have issues. A common problem is cracking ring lands and losing compression. Somtimes rods bend..basically, after 8psi your skating on thin ice. Install some 8.6:1 JE Pistons and Eagle rods....and you can boost 15-20psi safely! Of course if you have the proper fuel setup, and a performance clutch...but as far as the engine goes..that's the guidline.

 

[1995_eclipse_nt]

i would like to get any info on putting a 2.4L shortblock out of the Stratus, into my 1995 Eclipse GS. Any help or comments about it would very much appreciated. Do the ymake a stroker kit as well for that? Not going with turbo so dont want to hear about that, thinking about going NOS

 

[MikeV]

Soooo, what did the pig dyno at? Hello? Are you there?