DOA has a HIGH FLOW PORTING: 3VZE CYLINDER HEAD UPGRADE
listed on their website is this a good buy? will I get a 33% horse gain
does DOA have a good rep?

 

Ears all I am!! [/yoda voice]

 

Tell them you want a before and after dyno of the increase. I would be thoroughly amazed at a 33% increase in HP just from porting. Sounds like bunk to me.

Is it a good buy? You didnt say how much. So how much do they want?

 

I thought their porting was worth something like 7 HP and their cams about 10 HP. You'd need both of those to get more than 10% increase. The cams might help though - I think it moves the power band into the lower RPMs which is very useful for our vehicles. I think you'd get similar increases from headers and a good exhaust and you don't have to crack the engine open.

 

33% eh...lol..Ya right. Well. If you just add a TRD sticker you gain from what i hear 5 horses.
I believe what they are probably refering to is 33% heresay hp gain.

 

Maybe this is what teddy meant:

As quoted by 4 the hard way:

That's the only way I can see anything close to a 33% increase. I dont even want to know how much that ran him.

 

None of DOA's stuff is cheap. Is he saying he got his engine fromt hem too? Wow - that cost a pretty penny if he did. So if he has 200 HP how much torque does he have? What RPM range does he have this power - would be useless to peak above 3500 RPM.

 

here is the website with their claim

http://www.doaracingengines.com/cylheads.html

 

I messed up it was 33 hp gain instead of 33% but really whats the diff.

I think a good upgrade to this engine would be a V-8 swap.

 

So for $975 they are claiming 33HP...interesting.

 

I HIGHLY doubt you can get 33hp from their cylinder heads. For almost $1000, that is rediculous anyway. For 2.5k you could have a supra turbo swap done FOR you. That would be around 260hp no mods.

 

Where can you get that done?