Ultimate Beta I NA build questions...

[wilburisthecoolest]

Ok gentleman, i have a 2.0 Beta I and a 1.8 Beta I. What internal parts should i use with what to make the most power? Because that question is so confuseing, say.. using the 1.8 pistons with the 2.0 rods and the 1.8 crank will have X piston speed and have X compression ratio and have X displacement equaling roughly X horsepower. Does it make sense now?

I want to make it crazy. But for now i will be running the stock ECU. Yeah yeah i know.. i have piggyback fuel tunning and that works good.

So lets break out them caculators and see what we get!


And i guess if no one helps me ill just go do it all myself and wont tell anyone how to make a 170 horse Beta I. Since i already have a 151 horse 1.8.. shouldnt be too hard...

[97redtib]

If you mess up the very nice engine that you now have sitting in your garage that you got from me in this process...well Ill probably laugh!! LOL!! jk!!

[faithofadragon]

only parts you should convert from the 1.8 to the 2.0

for NA

pistons will gain you a 11.0:1 compression
cam is slightly more aggressive on the 1.8

now if you do a 1.8 piston/rod combo and install it into the 2.0 youll have about 7.8:1 compression then you can boost the hell out of it and forget any plans for NA


NA 4 cylinders arent worth the headache
BUT if i was going to do a NA setup for decently cheap i would:

regrind cams to somethin like 272 duration
1.8 pistons on 2.0 rods
shave head down a few mils and get 12:1 compression
p&p the head, go larger on valves and get the quelch area cleaned up
tubular IM with a nice sized TB
header and exhaust

[WytchDctr]

I think the 1.8 crank is a better idea if you plan to spin the piss out of it. The 1.8's pistons cross 75fps at 8500rpm, the 2.0's hit that same speed at 7200rpm. The inertial load puts a hell of alot more stress than say adding some combustion pressure via boost.

[faithofadragon]

random once calculated a piston/rod combo with a 1.8 crank in a 2.0 and calculated it to rev to like 9k rpm SAFELY

[wilburisthecoolest]

Originally Posted by WytchDctr

I think the 1.8 crank is a better idea if you plan to spin the piss out of it. The 1.8's pistons cross 75fps at 8500rpm, the 2.0's hit that same speed at 7200rpm. The inertial load puts a hell of alot more stress than say adding some combustion pressure via boost.

So i should just keep it a 1.8? Thats what i was thinking too, cause ive driven the 2.0 and it just feels like it doesnt want to spin up beyond 5k. it just gets mad at you and wont do it. My car gets mad when you DONT pull to the limiter...

I think im going to look at useing 1.8 crank with 2.0 rods/pistons. I need to do some more math, cause i didnt do that or 1.8 crank 2.0 rods 1.8 pistons, or 1.8 crank 1.8 rods 2.0 pistons.

Intake mani will be easy, i have a tig wielder and its going to look sweet. I'm thinking a equal length intake manifold.. mmm.. yeah..

[Coal_forge]

1.8 crank 2.0 rods 1.8 pistons will yield a higher compression than 1.8 crank 1.8 rods 2.0 pistons

2.0 rods will also allow you rev higher.

If you would like I could do the math for you....

I envy you wilbur I do not have a tig yet....

I have been planning an intake manifold myself... funny you mention the equal length... I wanted to run my intake like an exhaust manifold. the runners will sweep towards the rear of the engine to a throttle body... I have other throughts as well..

[wilburisthecoolest]

Dude if you got the specs feel free to do the math lol! Ill have to dig them up again..

Yeah, i was going to have it so the throttle body faced forward, with a small plnuem behind it and have the four intake runners come into it on each side and have them snake to the head. The TB should be right next to the coil packs when finished.

Either that.. or ITB's. And i have great ideas for them too.

I got a 86 golf for christmas so that will be my daily while i can work on the Hyundai. So i really have unlimited time. Unlimited funds would be nice too...

[Coal_forge]

here is some inspiration wilbur

2.0 N/A 8150 rpm with 274 cams
ÆÄ¿öÇ® ÀÚµ¿Â÷Æ©´× Á¤º¸-ÇÏÀÌÆ©´×

ignore the jibberish letters it is a korean site.
for the video press the button in the center that says Play vod

[Asian_907]

Damn...

Those are some aggressive cams. That idle sounds rough and aggressiev as shit. Do you knwo what the numbers are in that thing?

Howie~