I'm working on an LS motor for a friend, its got to keep all oem parts.

I have everything pretty much down, but i couldnt find any difference in the oem non-vtec cams.

We will be running ctr pistons, itr intake manifold, itr header, the head will get a valve job and very light porting.

Whats the most power that can be made on stock ls cams. the cams i have are from a 93 DA integra.

 

check out frankacura's b22 build. He got 160 whp with stock cams, but with a 2.2L block ported head and tuned.
You do know the modifications necessary to fit an itr intake manifold on a non-vtec head? And ctr pistons aren't always the best choice, do your research. With the modifications you listed you will need to get it tuned, at least street tuned. The ITR intake and exhaust manifold are designed to work best between 7000-8500 rpms with more air flowing from the head and more agressive cams, the stock b18b runs out of breath at 6500 rpms because of cams and head design.
The way I would build this setup:
62mm (itr or prelude) throttle body on a ported and port matched stock intake manifold
Slight port job on the head to clean it up and make sure everything aligns
94-01 b18b cams with a set of used adj cam gears
SiR 81.25 pistons
rehoned block
USDM itr cast manifold or ordinary 4-2-1 with max 2.25'' collector
dyno tuned, adjusting cam gears for the perfect power delivery and broad powerband

It will have b20 torque with those pistons and proper cam gear adjustement, torque which you wont see with an ITR intake manifold, and make a solid 140 whp well tuned.

Its all about balance of parts, making a good recipe and making parts work with each other.

 

I was figuring around 140hp.. that might not be enough for the class we are racing the car in.

As for tuning, thats no problem, tuning has been my living for the better part of the last 10 years. I have just never really done much with nonvtec motors.

In order for the car to work well we will need power to around 8000 rpms with the LS tranny. On a circle track you dont want to be shifting and the speeds at the track will require that much rpm to stay in 3rd gear. We have the option of using a b17 and ultimately we will probably go that route. the other cars in the class are making around 150-160hp. I dont think a 140hp ls motor will keep up.

I know the needed mods to run the itr intake manifold, and i have an s2000 tb that we will be using.

we can use race gas, so its getting ctr pistons either way, lol.

 

Nice to see you know where you are going with this, I wasnt so sure.
Stock cams will run out of breath at maximum 7000. If you have enough torque, you might be okay in 3rd gear with the b18 tranny. The good power delivery and proper gearing will make up for the lack of whp, maybe not 20 whp though. what are the rules in your class? Will you be running a baffled oil pan?
putting circle racing build in you tittle will get more views and answers from more experience people than me

edit I just read you need 8000 rpms in 3rd gear on a ls tranny, you dont think you would be faster shifting 3rd-4th on a b17 tranny than staying in 3rd gear on a ls tranny?

 

no, talking to the driver, he said shifting was not an option. It sucks alot of time to shift gears and will upset the car. i think he knows what he's talking about, he finished 2nd in points for his class the last 2 years in his late model stock car.

I'll see if i can edit the title.

We havent gotten to the oil pan yet.. not sure if it will be needed. We have a stock ls motor in the car right now to get us a base line.

 

IMO there is no way your going to make power that high with the OEM non-vtec cams, although a regrind is technically the same cam. I know that is bending the rules to the point to be considered cheating. IIRC the biggest OEM LS/B20 can is the obd2 LS cams. You also may want to look into a B16 manifold over the ITR for your rpm range.

Maybe a build thread? You could inspire others and provide some helpful details.

My simple B20 build if its any help.
https://honda-tech.com/forums/showth...ght=simple+b20