Sinfestboy

would any of you guys reccomend bore/stroking an sr20det?
in one of these situations:

a) with internal strengthening (forged/balanced pistons and rods, balance the stroker crank) running 15+ psi

b) no internal strengthening, running 5 psi street, 10-15 race

c) forged internals, (not balanced), running ~15 psi

and how much bore / stroke?

taz

there was an article in sport compact about a guy who stroked his Don't remember how much but he used forged 300zx piston after, the guy was running something crazy like 450whp!!

alchemist

how much hp are you looking at pushing.....the stock sr20det is capable of 300 rwhp without rebuilding. ask yourself the question, do you know how fast 300 hp is in a 240? You can always spend the cash on the stroker kit, but it all depends on what you would use it for....for me its not worth it

Sinfestboy

well, for me, the stroker is a portal towards greater hp, thus option B....

also, I am fairly new to 240's, what makes 300 hp so much in a 240?

alchemist

are you looking at just straight line acceleration? because our cars weren't meant for that, they can do it, but the suspension is meant to move, not just in a line like a camaro. Before you go spending you money on something like that, you need to know what kind of driving/reliability you want in your car, then see how well you can handle 300 hp in your 240....its ungodly fast with that much hp

Sinfestboy

mine is going to be ment for mostly drag, but I would like to be able to beat something like a stock LS-1 car, or a turbo'd honda... god damn I hate hondas...

ok... one more time... the purpose of stroking would be to reach closer towards 300 hp... not to get ungodly hp numbers. also, I hate F-Bodies with a passion, the best way to insult me is to say my car (or future car) is like a camaro.

and what makes 300 hp so much faster in a 240 than in another car like a supra or something?

Catharsis

the ka24de can take 300hp with out rebuilding. a well managed sr20det can take 400hp easy.

alchemist

A stock Sr20DET wont take 400 HP without an upgraded bottom end. Do you already have the engine? Because if you are looking for drag racing ability, you might want to look into poping a RB20- or 25DET into there, the handling wont be as good, but for dragging, that beast can make more power cheaper.

I'm not trying to insult you by talking about the F-body, but, the 240sx wasnt built for the 1/4 mile, it was designed to handle the twisties.

Sinfestboy

I just realized that I said "mine is going to be ment for mostly drag" but I meant to say "mine is not going to be ment for mostly drag"

anyways, I still would like to know what makes 300 hp in a 240 soooo fast, and wether a 300 hp sr20det 240 would beat an LS-1 car.

and, of course, I have my original question,
would you reccomend bore/stroking an sr20det?

please alchemist, you seem to know alot, please answer my question.

taz

do you already have the engine (sr20) or are you thinking of getting it and stroking it? if you don't' already have it just put a turbo kit on the KA motor run 12 lbs and spank most turboed hondas. The KA motor can be a good turbo motor, it's already got a great torque curve. You'll be surprised how well it responds to a turbo

alchemist

300 hp will put you within striking distance of those cars, the 240 is about 300lb lighter than a vette ('99 3246lbs) It depends on how the power curve is on the car, and then most importantly how the two drivers are.

300HP is easy to make on the SR or KA, its when you go for more power that requires more power to be made. Go talk to mark west (runs zilvia.net) He had a heavily modified KA-turbo.

The handling on a 240 with decent shocks/tires/springs will kick the **** out of a camaro

It all comes down to how much do you want to spend

Boring and stroking will run major coin on top of the original engine cost.....and no one knows how reliable the kits are for it.

Sinfestboy

thank you very much alchemist that was very helpful.

I got another question, but I think I'll make a new thread. I am trying to get lotsa threads going cause I want this site to get bigger, and when most newbies come to a site, and see only like, 30 posts, they usally pass it by... so dont think I'm a post wh0re, I'm just trying to help the site in my own wierd little way.

PSM

Dont forget about tuning. In order to make that much power dont rely on piggy backs. I would definitely look into a Haltec or TEC-II.
TEC-II is a bit pricey and not too many people know how to tune it. Haltec should be fine.
AEM has released their managment system too but I havent heard any good/bad news yet.

Sinfestboy

well, for me, I always forget to include engine managment system, cause its like a given for me and my friends. why? An older friend had a 2g (the generation before this one) MR-2 Turbo. He upgraded the turbo, did h/e, fuel pump and injectors, and was tapping 225 hp, then he got it tuned , with new computer and hit a WHOPPING 275. I was like: WOW. then they detuned it so the powerband would be wideer (got a new cam, too) and peak hp was about 250, but it stayed above 225 for like, 2000 rpm. that car was cray. then he wrecked it doing 120 on the highway (says he sneexed and jerked the wheel, but I dont believe him) and that was the end of that car.

but for computers.... are there any that look cool, and can be displayed and "edited" from inside the cockpit? kinda like an Apexi SAFC, except a whole engine managment system.

Typical Cat

Sr20DET, stroker kit will make it SR26DEt, custom set up