I am new to the forum, and have been searching for a while on here for information about engine performance swap options. I have a 98 elantra that I want to do a budget performance build.

that'll depend on what you define as 'budget' build and what your goals are. thanks for taking the time to do some of your own searching, thats unusual.

I was wondering if swapping cams from a different beta engine would help.

not that i know of. all the cams are the same for all 2.0L beta engines. if you find something else that fits with a higher lift and duration, let us know. even getting a shop to grind down the journals is ok, but nothing really seems to fit that i know of. i'd happily do it to my accent.

I was also wondering how the 2.0 was stroked (i.e. via crankshaft or pistons and rods).

what are you talking about? stroke is a product of crankshaft throw. conrods are sized to simply support that throw with regards to overall dimensions.

hyundai engines are generally designed as a 'box' engine or stroke roughly equal to piston diameter.

Also wondering if there is an injector swap option and or throttle body swap option. I am trying to keep this almost a strictly junk yard build. Please let me know any information you might have. Thanks.

injectors are upgraded when your fuel requirements surpass their flow capability. doing injectors before is outright dumb, because now you have to worry about changing your fuel map to support different flow characteristics. its unlikely you will hit your injector limits with an NA build. the rule of thumb is about 10% extra capacity for injectors, some are more.

as for a throttle body it is a great idea, i'd find a similar hyundai TB off say maybe one of the SUV's with a larger engine, and then find a way to adapt it. get creative, adapter plate, whatever. there isn't anything that simply bolts up that i am aware of. for a budget build getting the TB bored out is just insane.

 

There is some posts on this site that have info regarding the 1.8L cam, intake or exhaust I cant recall, but it gave the 2.0 a lil boost. Hyundai did this themselves for the Tiburon FX editions.

 

DREROB - I have read the same thing. someone said the 1.8 cams are more aggressive than the 2.0 cams, and also that the 1.8 pistons will raise the compression in a 2.0 to about 11:1 compression ratio. I currently have a 1.8 engine in my car, so I am thinking that buying a good 2.0 short block and swapping the head and pistons from my 1.8 will make it better, or maybe just invest in a 2.0 crank.

I have also read that the 1.8 engine computer is the better one to use. I don't know what the difference is, but if anyone has any information that will help.

I also went to the junk yard today and fount that the throttle body from a 4 cylinder sonata bolts right up. The TPS is different (4 wire vs 3), an the IAC is built into the throttle body on those versus the external one on the elantra. The diameter is significantly bigger so I will probably try to make it work if i can.

any more information will help. Thanks

 

More information
- from what I've found, the 4 pin tps is for auto (like a kickdown), and 3 pin for manual. I should be able to repin the connector for the 3 wire setup without a problem. I will have to grind out intake manifold for the bigger bore size but thats no big deal.

- http://www.hyundaiperformance.com/forums/elantra/70530-1-8l-elantra-2-0l-swap.html

- 1.8 pistons in 2.0 block - New Tiburon Forum : Hyundai Tiburon Forums

here are links I found regarding the cams and pistons. I am thinking 2.0 engine with 1.8 cams and pistons. I will try it and post how things go.

I am also thinking adjustable fuel pressure regulator as apposed to bigger injectors (per Z-G and a friend of mine who knows his stuff).

I think the biggest issue then will be getting the PCM to agree with all the engine changes. Any ideas?

 

i wouldn't even worry about the ECU/fuel at all unless you're doing cams. the stock ECU can handle some extra grunt just fine, its programmed to handle different air densities remember. it has some headroom just not enough for stuff like a turbo.

 

I know the ECU has some room for adjustment. I guess I should also have noted the cat will be removed (car will be used in entry dirt racing class). I don't know if there are any O2 simulators available or not. I also have to get on alldata and check but based on the little I know about ecm's it should just be looking for a difference in ohms from the first and second O2 sensor, so would finding the right wire and putting in a small resistor work as an 02 sim? I don't know a whole lot about ECU's but I do know that it adjusts fuel partially based on readings from 02 sensors.

I have 2 elantras, a 1998 1.8 5sp, and a 2000 2.0 auto. Trans is going out in the 00 so I am hoping to use that as a parts car.

Also, any cam gear options for adjusting cam timing? Since I will be racing it I don't need it to idle well, but high rpm power would be ideal. The guy I am building the car with wants to jump a tooth to adjust cam timing, but I think that could be detrimental to the engine. Any thoughts would help. Thanks.