ok im building a b20 vtec and i was wandering what head to use and can i use the b20 pistons and rods and if not what sould be used. if the head is a vtec head than do i need to get a vtec kit for the block or not

thanxs for the help

 

i dont think you should do a b20 since you have no idea just take it to a reputable shop and tell them to get it done becuase if you have to ask what head to use i can see that it wont drive for mighty too long

 

ok acualy im asc certefied and dont tell me to get somene else to do it cuz dont know what head to use

 

Asc certified eh? I guess they didn't teach research skills then.

Anyhow, the whole idea of a b20/lsvtec is to combine the low end power of a 1.8/2 litre with the high end power of a vtec head. You'll need to track down a B16/GSR/Type R head. The type r and b16 use the same head casting, but different internals. Best bang for your buck is the b16 head. The gsr head is a "headache" waiting to happen, don't touch that one.

You'll need to buy different pistons for better valve clearance, you'll need to plug an oil port in the head. You'll need to run an external oil line to feed vtec through a seperate hole in the head. You'll need to reinforce the conrods by either getting them shot-peened or just buying new ones all together, you'll also need arp rod bolts to add even more security. You'll need a chipped vtec ecu to run your new fancy setup without blowing it up. It's also a good idea to have your head rebuilt (because the guy you're buying it from is probably sketchy).

Oh and you'll need a whole bunch of common sense. Do your research.

 

https://honda-tech.com/forums/all-motor-naturally-aspirated-44/how-build-%22reliable%22-lsvtec-b20vtec-1676914/

 

yea well THAT WAS A DUMB *** QUESTION i mean the point is b20vtec so common sense tells me i would have to use a vtec head

 

get a golden eagle ls/vtec kit, takes away 75% of the headaches, type-r head if you have the money to spend

 

coulld you tell me why the gsr head is a head ace waiting to happen... because i have ran that head on my b20 vtec with no problems and you can also use b20 pistons and rod no need to have them shop peened just get arp rod bolts and thats not even a must if your not taking it past 7500 rpm arp rod bolt are good to 8000 rpm and no more then that

 

i had a P72 head on my B20vtec with RS Machine never had a problem at all. and have had a couple of friends run the same set-up so you might have had a bad run with or something but we swear by that and it works.

 

I think he is referring to the 2 butterflys in the intake runners on the gsr head.

 

you seem like you aren't sure on what to do yet. so if you were going to do all that with a b20v setup, i'd recommend you just buying a turbo kit and run b20 turbo. it already has low compression so you can boost and still have good reliability.

 

The B20 cylinder walls are awful thin for turbo. Could you get away with it? Yes, but sleeving it would be safer. Then if you're sleeving it, you may as well put new rods in, and pistons, and... yeah, you get the point. And you still have an LS block that's not as strong and doesn't have a girdle or the oil squirters of the GSR. It all comes down to money...

I'm in the research stage of building a B20VTEC, kinda. Well, actually boring and sleeving a GSR engine to 2 liters. I figure if the engineers at Honda designed the VTEC engines differently than the LS engines, they probably know more than a bunch of people like us trying to molest their creations and make them do things they weren't designed for.

 

Correct. Glad to see someone on here doing a little thinking before posting.

 

yes well actually i was thinking because i said i ran a gsr head on my B20 which had the stock IAB sytem on it for a while it ran fine. so before you go assuming that i had an aftermarket intake manifold on it, you sir should be the one thinking about posting before asking questions

 

so back on track here and help this guy out. . .

 

i just removed the butterflies and retuned it of course.=P

 

i kept mine on while i was mocking my harness up for ITB's. but still have a buddy who still runs them for whatever reason?

 

I don't remember asking any questions. Back on topic.

 

A turbo is perfect for an LS though anyone agree?

 

Ok since noone is help the poorguy ok here's the deal if u wanna go b20vtec use a gsr head that is my choice cause the b16 head is poor and the type r head is just to high of a redline for the thin sleeves of a b20 so the best head to use for ur first big build is a gsr head and oh u will have to tap the block that way oil and get to the vtec..correct me if iam wrong but just do what I just said haha