what is better

[speedncivic]

I was wondering, is it better to have Vtec with turbo or NoN Vtec with turbo. I have heard that Vtec and Turbo conflict with each other. I am going to be doing a swap in my civic but want to make sure that I dont buy the wrong motor for the swap. I would like to get a B16a2 or a B18c1. I was thinking about getting a type-R but that is not a turbo motor. Please help me out with some answers and some suggestions.

[CivicSpoon]

There are plenty of turbo'd vtec engines around, that's what most people do. So obviously thousands of people are doing it just fine, don't worry about it.

[97integrals]

Originally Posted by speedncivic

I was wondering, is it better to have Vtec with turbo or NoN Vtec with turbo. I have heard that Vtec and Turbo conflict with each other. I am going to be doing a swap in my civic but want to make sure that I dont buy the wrong motor for the swap. I would like to get a B16a2 or a B18c1. I was thinking about getting a type-R but that is not a turbo motor. Please help me out with some answers and some suggestions.

Yes vtec motors love turbos because of their free flowing heads. This is an old myth in the Honda community. go here and look and learn: http://www.honda-tech.com/zeroforum?id=16 The gsr motor in my opinion is really the best candidate for a turbo build up with the most potential.

[civickiller]

how did this rumor get started. i mean im on alot of forums and ive never seen anybody make that claim. but alot of people think that.

i think its because people just dont know what vtec and a turbo is because if you knew what both were then youd know its actually better for turbo.

[QUICK_EG_B16A]

Well it's true that nonvtec motors have lower compression, so in that aspect yes they're great for turbos as lower compression means higher capabilities of boost. However, and I DO NOT know this for a fact, but have heard that the stock nonvetec components(crank and rods/pistons especially) are poor at handling boost. they are also not as reliable revving them into high rpms(past 7000). However if your going to build a turbo motor you'd be replacing all those anyways if you plan on boosting much past about 10psi(on any motor). On a side note though... If you want a more powerful engine, start with a more powerful base and then BUILD IT ACCORDING TO WHAT YOU WANT! I personally prefer NA though because it is less to worry about (and if a cop pops your hood they won't see any, or at least as many mods) but, turbos are very fun, if you go with a vtec turbo set up just get a vtec controller and set the vtec lower for a faster spool up.

[aznbmxxxer]

turboed vtec engines make more power then a non vtec engine. i saw a dyno chart a fully built ls stock specs with 30 psi made about 500whp, and a fully built gsr made over 500 on 23psi.

[tomsindahizouse]

I believe that the whole VTEC turbo, Non-VTEC Turbo thing is just about how technical you want to get. As far as I know....When you Dyno a VTEC Turbo there is a small power drop on the powerband when the other cam profile engages (according to the chart), Which If you were gonna be trying to push every single ounce of horsepower out of the car I could see getting the VTEC Killer Cams, or a non VTEC Engine. I really dont know enough to talk about this, but I just wanted to put my 2 cents in. If I am wrong someone please correct me. I would just go with your gut feeling.

[97integrals]

Originally Posted by tomsindahizouse

I believe that the whole VTEC turbo, Non-VTEC Turbo thing is just about how technical you want to get. As far as I know....When you Dyno a VTEC Turbo there is a small power drop on the powerband when the other cam profile engages (according to the chart), Which If you were gonna be trying to push every single ounce of horsepower out of the car I could see getting the VTEC Killer Cams, or a non VTEC Engine. I really dont know enough to talk about this, but I just wanted to put my 2 cents in. If I am wrong someone please correct me. I would just go with your gut feeling.

That's not correct, a vtec motor will out flow any non vtec motor. Vtec killer camshafts don't eliminate the high profile, they eliminate the low profile. So essentially you are running vtec all the time. Bottom line with cost not being an issue turbo vtec > turbo non vtec.

[civickiller]

Originally Posted by QUICK_EG_B16A

Well it's true that nonvtec motors have lower compression, so in that aspect yes they're great for turbos as lower compression means higher capabilities of boost. However, and I DO NOT know this for a fact, but have heard that the stock nonvetec components(crank and rods/pistons especially) are poor at handling boost. they are also not as reliable revving them into high rpms(past 7000). However if your going to build a turbo motor you'd be replacing all those anyways if you plan on boosting much past about 10psi(on any motor). On a side note though... If you want a more powerful engine, start with a more powerful base and then BUILD IT ACCORDING TO WHAT YOU WANT! I personally prefer NA though because it is less to worry about (and if a cop pops your hood they won't see any, or at least as many mods) but, turbos are very fun, if you go with a vtec turbo set up just get a vtec controller and set the vtec lower for a faster spool up.

i dont think he knows what hes talking about, sort of right but very wrong.

lower compression does mean more boost but the amount of boost doesnt really mean anything its more about the cfms and the power you are making because you can run a t25 and run 14psi of boost which could be equal to a t4 at 7psi, hp wise. so i think its better to look at how much hp your making not boost. and all b series can handle 300hp pretty safely, not recommended to go higher than that. also a turbo doesnt make your power band, its your cams and how much your head can flow that determines your power band. theres alot more but i dont want to type anymore

[superbluecivicsi]

Originally Posted by QUICK_EG_B16A

Well it's true that nonvtec motors have lower compression, so in that aspect yes they're great for turbos as lower compression means higher capabilities of boost. However, and I DO NOT know this for a fact, but have heard that the stock nonvetec components(crank and rods/pistons especially) are poor at handling boost. they are also not as reliable revving them into high rpms(past 7000). However if your going to build a turbo motor you'd be replacing all those anyways if you plan on boosting much past about 10psi(on any motor). On a side note though... If you want a more powerful engine, start with a more powerful base and then BUILD IT ACCORDING TO WHAT YOU WANT! I personally prefer NA though because it is less to worry about (and if a cop pops your hood they won't see any, or at least as many mods) but, turbos are very fun, if you go with a vtec turbo set up just get a vtec controller and set the vtec lower for a faster spool up.

I believe that the whole VTEC turbo, Non-VTEC Turbo thing is just about how technical you want to get. As far as I know....When you Dyno a VTEC Turbo there is a small power drop on the powerband when the other cam profile engages (according to the chart), Which If you were gonna be trying to push every single ounce of horsepower out of the car I could see getting the VTEC Killer Cams, or a non VTEC Engine. I really dont know enough to talk about this, but I just wanted to put my 2 cents in. If I am wrong someone please correct me. I would just go with your gut feeling.

a few wierd things going on here in these two post.

bottom line is........................vtec + boost =

specifics can be found in a google search, because, there is 15 years of info covering this.

[tomsindahizouse]

So let me get this straight....VTEC Killer Cams eliminate the lower profile and keep the higher profile, so in a sense they really dont kill VTEC, they are just in VTEC all the time? Can somebody else re-assure me of this so I dont have the wrong information?

[97integrals]

Originally Posted by tomsindahizouse

So let me get this straight....VTEC Killer Cams eliminate the lower profile and keep the higher profile, so in a sense they really dont kill VTEC, they are just in VTEC all the time? Can somebody else re-assure me of this so I dont have the wrong information?

Ok I said that essentially you are in vtec all the time to make things simple to understand, as must people associate vtec with the high rpm cam lobes. However, technically these cams do eliminate vtec. Because vtec is just variable valve timing so if you eliminate the low profile lobes then you are eliminating vtec because there will be no cross over and no variable valve timing and no vtec. These cams have an extremely aggressive ramp angle and are meant to be driven from 5000-12000 rpm. There is no low profile lobe just two very big lobes from the beginning. These cams are not street able, they give you no low end torque, they idle at like 3000rpm, and are race only.

[tomsindahizouse]

I am not arguing with you and I appreciate your reply, but all I want to know is if somebody could back this up other than you. I dont want to have the wrong information. I believe that you are right, but before I can wholly agree....i just need a second opinion.

[CivicSpoon]

He is right, that's exactly what they do. They are even in one of my Best Motoring vids, it's where I first heard of them. They're made by Toda btw.

[SiGNAL748]

I'm better.