i plan on building an h23 as "you've prally all heard"
im wandering, what is too much HP put in a motor prior to a turbo, before the motor explodes
if the engine has a good CR and everything is tuned to its maximum optimality
would turboing it ADD extra horses like simple math,
or is it more complicated algebra. would it just blow a shitload of air in and not combust as fast and powerful. or add more power than it can handle and simply, be more than is even possible for any engine to handle.
or could you just adjust the psi to a smaller number than needed

[side qusetion]
i think the h23 has a cr of 9.8:1. im thinking that honda is obviously not full of idiots and this cr is good for a prelude, however, im putting it in my heavier Accord dx (four door) would a cr of 12:1 be good for my accord? too much too less, remember i want to turbo it later.

btw, sorry ima noob
still learnin everyday
^^

 

Generally speaking, as I'm not a turbo guy. You want a lower compression ratio for a turbo. You choose your size of one you want and get appropriate injectors/fuel pump/etc to match and keep up with it. You NEED to have a tune regardless of what anyone in the other thread said as this is how the air/fuel mixture is controlled.

The Forced Induction section I'm sure has a "Getting Started" or "FAQ" thread stickied at the top.

 

do you know if the stock pistons and cylinders of an h23 will melt if i turbo it?
or should all that be replaced for sure?

and thanks. i shall read it!!

 

CR doesnt need to me adjusted to weight of vehicle it needs to be adjusted to the motor, if i threw a h23 in a truck, i couldnt make it 20:1 wouldnt make sence, Stock CR would be okay for 6-8 PSI

 

If you are going to boost, you need a cr lower than 12:1. If it is going to be a street car you are going to need be around 8:1 to 9.5:1 CR. And if you will be running a 9.5:1 CR you better have access to a good tuner otherwise, you will have pre-ignition problems. The reason is the availability of high octane fuel which is rated at 91 or 92.

 

i think my question should have been, do i need to sleeve and piston the h23 no matter what ?
options:

up the turbo psi, and risk melting the stock stuff

or sleeve and piston it now for more power (bigger bore) and still have strong new pistons to handle the turbo for later on.


and this goes back to my statement "honda is obviously not full of idiots"

idont really know if this engine even needs sleeving or bigger pistons, or even if the cr needs to be tampered with at all, it could be perfect as it is. would a larger volume piston even add that much more power than its worth??
its almost a 10:1 cr already, is that fine for a non track car?
im going for a scary dd basicaly

 

A stock piston h23 could make 300hp boosted.....how much power is you goal? Then your answer can be answered

 

im going to shoot for 400, i know im going to under shoot that, but a part of me thinks i have a chance of exceeding it.

as a tuboed h23 dd. how fast would that ware my motor??

 

Not going to exceed 400Whp on stock internals for very long. You will need forged internals and sleeves. This thread feels like a dejavu..................

Your Hp goals have doubled since this post. In another two weeks you may be up to 600whp and on your way to actually knowing what it takes to get there. to research

 

Actually a fully loaded Accord EX has a Gross Vehicle Weight rating of 3020lbs. As stated in the manual. The H23 Prelude weighs in at 3790lbs, also stated in the manual. Your dx Accord is even lighter @ 2822lbs.

And a 12:1 CR is not good for boost.

 

no sleeves, wesico or mahle makes compatible pistons, stock or eagle rods will do....eagle rods are alot stronger.

 

wow, its lighter!!!!!??? sweetness. i thought........the four doors

and alterdcreations
you talkin about golden eagle, or is eagle a different co. ?

 

shes "prally" cheatin on you.....

sorry op had to do it.

 

haha HEY!! prallys my word >

 

haha ! good luck with the build man!! H's are the **** , H's are for people who enjoy torque lol.

 

thats what she said -.-
heh

thanks man, i think this car as a whole is going to be legendary once complete ^.^

 

 

hey, its my #1 fan haha
ill post some pics of what i vision for this car soon

 

I shall be waiting..

 

i have read through this and have a lot to pick a part. if i can remember it all. First off the CR issue... i personnally just did my h23 and have been very satisfied with my resuls. I am runnin 10.5 cr which is obviously above the stock CR. I did dayton sleeves, wiseco pistons 10.5:1, crower rods (eagle doesnt make rods for the h23 anymore). did 5 angle valves titanium valves and retainers, oversized rings. can remember any more specifics. but the general (important stuff). I am running a turbonetics 60-1 56 trim turbo. fmic standard stuff. first time to the dyno hit 356 on 11 lbs of boost. a lot lower boost then i want. Using my baby turbo till more funds.... with this build im going to run 20 lbs on a much bigger gt35r. all the people that ever say running 6-8 lbs on a stock motor are idiots. i tried it before my build. had 111000 original miles and it lasted about 10 days. so whoever says 300hp on stock motor....wrong....you'll quickly be at zero. Don waste your time and money on a turbo kit from ebay with no aftermarket inernals. Trust me!!! I may be in debt but this project was well worth hitting high 11's at the track his year. hit me with pm's please im always looking for improvements or critiques

 

you must of had either a horrible tune or a tired engine to die that fast..

did you do a compression test before the install?

 

X2

 

had compression test. everything checked out. Had a base tune with hondata s300 from my tuner. the base tune was the same one used after my build but obviously the stock motor didnt handle he boost well. roughly 6 lbs on the base tune. nothing too extensive done with that tune before it blew...

 

also had new timing belt adjusted the valves and had new water pump and oil pump on the stock motor..... didnt make sense to me with all the other info on boosting stock motors but i very rarely if ever again will belive what people say about boosing sock motors

 

I personally would boost a 12.5:1 compression motor. Your car is gonna make power til your turbo spools and that compression is gonna spool your turbo alot faster as well. Low compression boost is for people that are unsure of their motor/tuner cause it gives them more room to play. If you have a good tune on your motor it'll be a monster and still be reliable