Okay guys ive talked to a few people about this i just recently found out that the rsx type s ive had for 4 years has a k20a3 head and block who ever owned it befor me did a cheap swap what a retard anyway it still has the a2 computer/ecu,intake manifold,and tranny. the reason im sayin this is i was looking to buy a VAFC2 controller and i was just wondering if bein i have a3 motor an a2 computer and yes i checked the manufactuer code on the ecu and its a a2.if it would throw the VAFC2 controller of an pretty much make it difficult to tune any suggestions.....Another thing is can anyone explaine why i can still vtec if i have the 2lobe a3 head but the a2 computer thank you for any feedback

 

You take your car to 8200? It still has the regular 3-lobe vtec? Damn, can I get a freak a3 like that lol?!?!

 

all the way to 8200 but it has 2lobe cams not 3lobe and it still has vtec i dont understand need someones help

 

VAFC controller is worthless imo, save and buy kpro, then tune...but the way your motor is all fux0red up i would take it to a tuner asap and see what they suggest or you can pm my tuner on here, his s/n is d-rob

 

vafc is worthless

 

Thank you both

QFT

 

ya i was thinking bout keeping the a3 long block and getting a z1 head so i can go turbo.....but it still boogles my mind how i have vtec? oh well thanks you guys for the replies back

 

Why would you get the z1 head? Just seems like a lot of extra work for a motor that you're just going to boost. An extra 20hp or so, if you do it the "right way" isn't going to mean anything but more traction issues when you go boost.

 

The money you would spend on the head swap you could just use on building your block and/or getting some good turbo cams.

 

have you ripped the head apart? because he could have thrown the cams in the a3 head

 

Something is fishie here.....I do not think a a3 motor would run on a a2 ecu unless it was kpro'ed and had an a3 program downloaded into it. My reasons for thinking this......
1) way different compression ratios = very different timing advance map.
2) if you were running a a3 motor, you would be running on one intake valve per cyclinder till 5800rpm. I am pretty sure the car would be undriveable from 4000rpm to 5800 rpm.

 

this is what i thought as well....i know there was speculation on a2 ecu's being able to work on the a3 but but i was pretty sure that the theory was not able to be proven....

so OP you have thought this whole time you have had a a2? you have six gears? and 2lobe cams? have you ever hit 8300 rpm?

 

He says he takes it to 8200...

This is just too strange. We need pics from under the valve cover and of the block stamp.

 

i know but a2 redline is 8300...i'm trying to rack my brain thinking of combinations that this motor could be lol

 

im not quite sure the a3 block would last 4 years reving that high either

 

If he infact he has a k20a2 ecu, its got to be kpro'ed....It could be just a rekeyed ep3 ecu with a reflash...

 

if it is kpro'ed his redline would be 8600 and it is possible that whoevee had the car before hand got kpro and then never got it tuned, which is dumb but ep3 ecu rekey could be possible

 

Could be de-tuned to 8200 rev limit on the K-Pro. I say pics or close lol. I really want to know what's up with this motor lol...

 

true....i agree i would like to know what is up with this motor....where is the OP?

 

Haha seriously...

 

Ill make sure i post pics within the week but i can promise you and youll see when the pics come up that i have a3 block an a3 head....it still has the 6 speed tranny...it will go all the way to 8200 and the vtec kicks in hard around 4900-5200 and it also for sure has the a2 computer marked very clearly PRB no one i talk to can get this figured out....dont think it has been k proed would be nice though any other suggestions

 

and im pretty sure all the internals are stock but everyone is right i shouldnt be able to vtec like i do with the 2 lobe a3 head very mind boggling

 

give me a few days to post pics i don have my own personal computer so its hard to get pics uploaded

 

Are you sure it's just not tuned really crappy so that it's sluggish until peak torque kicks in which for the EP3 peak torque is about 5k RPM's. Then they just tuned it to rev limit at 8200?

 

That ecu has to have reflash or kpro'd. Ur vtec engagement point is too low for stock. What is it like 5600 on the ep? The rsx-s is 5800 on stock ecu