I recent picked up a used motor from the salvage yard for 150 bucks plus a 20 buck core; im interested in rebuilding the motor. I want to redo the complete lower end of the motor, but not much more on the upper end other than refurbish the heads already on the block. I don't want to get into looking into other head swaps and changing timing belts from other motors it I don't have to. I need some suggestion on how I could get more power. I considered replacing standard pistons with oversizes one and replacing the cams. What do you all thing.
Not scared of the work just on a budget.
I'm currently at :::DOHC PGM-FI 1834 130hp@6000rpm 121tq@5000rpm '90-'91 and want to get closer or above these numbers:::: PGM-FI 1834 142hp@6300rpm 127tq@5200rpm. Any replies are greatly appreciated.

 

Okay, reading your post, I'm not too sure what exactly you know and what you don't know.

Simply rebuilding the motor will not give you any power. You want oversized pistons, but do you understand what that entails? How oversized do you want? On stock sleeves, Honda only recommends boring 0.020 over, and that's for correcting any damage. Any more than that, and the sleeves aren't up to par. 0.020 over or an 81.5mm bore doesn't even give you a 1.9L. The difference is negligible.

If you want to go more than a 81.5mm bore, you'll want to go with aftermarket ductile iron sleeves. Most people go with a maximum of an 84mm bore which gives them an 2.0L motor, kinda. I'm not sure if that's what you're speaking of, unless you want to go to like a 2.5L which really isn't feasible.

You need to figure out what goals you have for your car. Power goals? Quartermile goals? Or do you want to build it for road courses? The possiblities are endless on what you can do....but you need to know your goals first.

Just off the top of my head.....
Ls/Vtec stockish
LS/Vtec built hard N/A
LS built N/A
Stock motor with turbo @8-10psi
Built LS with lots of boost

And with these above, you can have different power levels. Each level would require different parts.

Hope I helped, I tried to keep it general.

EDIT: Sorry, I didn't notice this part. I saw all the numbers and kinda stopped reading.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
I'm currently at :::DOHC PGM-FI 1834 130hp@6000rpm 121tq@5000rpm '90-'91 and want to get closer or above these numbers:::: PGM-FI 1834 142hp@6300rpm 127tq@5200rpm. Any replies are greatly appreciated.</TD></TR></TABLE>

Your goals are right there. Those secondary numbers seem to coincide with a stock 3rd generation B18B1 motor. Try to get your hands on some of the newer 3rd gen cams, as they are a little more aggressive than the 2nd generation ones. That, I believe, is what gives the extra power on the 3rd gen.

 

"Your goals are right there. Those secondary numbers seem to coincide with a stock 3rd generation B18B1 motor. Try to get your hands on some of the newer 3rd gen cams, as they are a little more aggressive than the 2nd generation ones. That, I believe, is what gives the extra power on the 3rd gen."

The b81a is 140hp in the 2nd gen integra....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h4x &raquo;</TD></TR><TR><TD CLASS="quote">"The b81a is 140hp in the 2nd gen integra....</TD></TR></TABLE>

im correct me if i am wroing but a b18a1 2nd gen motor is putting 130hp and
121 lbs of torque at the crank...

ive heard that a stock ls 2nd gen only makes like 100 to 105 hp to the wheels..
like i said correct me if i am wrong

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by txracer &raquo;</TD></TR><TR><TD CLASS="quote">

im correct me if i am wroing but a b18a1 2nd gen motor is putting 130hp and
121 lbs of torque at the crank...

ive heard that a stock ls 2nd gen only makes like 100 to 105 hp to the wheels..
like i said correct me if i am wrong</TD></TR></TABLE>

your half right,

90-91: b18a1 130hp 121 ft-lbs OBD0
92-93: b18a1 140hp 126 ft-lbs OBD1
94-01: b18b1 142hp 126 ft-lbs (94-95)OBD1 (96-01) OBD2

so basically 92 and up are where you wanna be. the main reason the 90-91 are much less is mainly because of the OBD0. and less aggressive cams.

 

so by switching to a 3rd gen ls cams its going to give me the same numbers as if it was a 3rd gen motor? just by the cams alone?

 

slightly higher compression maybe, intake manifold, exhaust manifold

 

i think just going to run crower 403's with header and intake manny

 

if you had the earlier 2nd generations and all u want is to get around the same power as the newer ls .. i think jus simple bolt -ons r good enuf .. i sat in a frends 1990 ls and i have a 1994 ls and its not really a difference that can be felt .. hope that helps

 

get 403's and boost! make sure to tune !