Will a 2g head be good enough?

[nickrule99]

Im going to be swapping a 6 bolt bottom end into a 2g, and I had hoped to keep the 2g head and use HKS 272's instead of doing a full 1g swap. Im going to be running a rs60 @ 23psi on pump.

Will this work ok? Or should I start looking for a 1g head?

 

[Awdboost]

It's fine.. Lot of people will tell you that your losing power because of the 2G head intake side is smaller.. But you will keep your mid range torque.. You will need to modify some things. Like the head studs and I would do a mild clean up on the valve area. I good head shop will know how to clean that up. But If you going for a HP monster then a 1g head with full port is the best way to go. But if you just want a faster car then the 2G is fine for your application. Also you will be happer on the street with a 2G head vs. 1G head if your car is a daily driver.

 

[nickrule99]

Im looking to put down just under 500whp with the rs60, so I guess its somewhat of hp monster. Ive heard the 2g head is better on the long run, with Aluminum Intake Manifolds, but I dont relaly want to drop another $500 on one.

What other things can I do to increase flow other than port the TB?

 

[greathuskie]

get the 1g head, the 2g is not going to give you the same power range as your turbo will

 

[Awdboost]

Dude you'll put down 500 easy with the 2g head.. I can't speak of any HP but I've run 11.544 @ 128 Witch is good for 510-530 to the Wheels HP. I was on a stock head, stock manifold, stock 7-bolt bottom end.. My only regret is that I never got on a dyno with this setup. Also you can get a Intake manifold for a 2g or 1g head. I would recommend using 1G TB Good turbo that can make at least 600 WHP, FMIC and DSMLINK. The SAFC suck ass You have no control of your timing with one.

 

[Awdboost]

get the 1g head, the 2g is not going to give you the same power range as your turbo will

This is true, but if you not try to be the fast guy, a 2g head with mild porting will do the job better then a 1G head. You'll have much more Mid range torque with a 2g head and if it's a daily driver then it's better to keep the 2G head.. you will be better off. If you don't believe me ask Rob a FP. Or Bill At Apex auto machine in IL.

Mike

 

[Tallen]

A 2G head with a nice SMIM will take you to your goals.

 

[DSMJim]

I'm not sure why people thing that a 1G head is better for producing power than a 2g head is. I'm sure it stemms from the fact that if you replace a FULL 1g head swap on a 2g motor there is a power gain. Thats because the intake manifold is better, the throttle body is larger and the cams are more aggressive, not because the opening size of the intake ports is larger.

A larger intake port vs. an intake port that is designed to be straighter at the valve is the real difference. To make huge power we know that the size of the port does not matter, it's all in the angle the air travels to enter the combustion chamber. Ask anybody who does head porting for a living which is more important. Making a head flow more CFM at a particular lift is not a job so much of just hogging out the holes in the head but making the path to the combustion chamber as straight as possible. This is where the 2g head shines. Anybody noticed the EVO 8 head? Its exactly like a 2g head because motor engineers have learnt that a smaller straighter entry to the head flows more than a huge hogged out hole with a hard turn into the combustion chamber. Anybody notice the evo's having a problem making huge HP with their "small" port head? No me either.

You will notice this summer that some major vendors will be offering their top performance head started as a 2g model because of the better valve angle entry. Simply having a larger hole makes us "think" it flows more but it does not. The angle the air travels at towards the combustion chamber is way more important in the flow of a head than the size of the intake port is.

Basically what I am saying is if setup properly your 2g head will take you where ever you want to go if mixed with the proper intake manifold throttle body and set of cams.

 

[92redman]

Jim, what do you think about a 2g head on a 1g? Leave the head alone, or would it be best to match the ports to the exhaust manifold and intake manifold?

 

[DSMTurbos]

stock 2g head, mangus im and 272s i made 501 still being pretty rich

 

[NDgsx]

Jim, what do you think about a 2g head on a 1g? Leave the head alone, or would it be best to match the ports to the exhaust manifold and intake manifold?

Leave it alone, don't use a 1G intake.

 

[BOOSTIN21]

go with the 2g head... as odd as it may seem i will be swapping a 2g headonto my 1990 TSi AWD. with a custom SMIM and cams. i cant wait to see what i will run with it
again thanks for all the help JIM.

 

[Eclipsei95cl]

Yeah I have been doing so much research on this subject for a while and DSMJim you make me want to run a 2g head. But I talked to the guys at FFWD and they say they wont even touch a 2g head, they said it is only for autocrossers and that I would regert buildin a 2g head. But Im leaning towards the 2g head from all the threads i have seen about this. We will see I guess.

 

[nickrule99]

Thanks guys. As of now, Im going to keep the 2g head on the car when I do the swap. I'll probably just get some cams to start with, and if I end up having flow problems, I'll get mysefl a nice SMIM.

 

[DSMJim]

Yeah I have been doing so much research on this subject for a while and DSMJim you make me want to run a 2g head. But I talked to the guys at FFWD and they say they wont even touch a 2g head, they said it is only for autocrossers and that I would regert buildin a 2g head. But Im leaning towards the 2g head from all the threads i have seen about this. We will see I guess.

Ask them why they lean towards a 1g head. The only difference is the 1g head has the intake ports hogged out so the angle on the valves is really harsh. I guess the "trick" here is they think a bigger hole flows more air than a well designed port and less radius entry to the valve.

Like I said, everybody has their preference and FFWD obviously does too. Does the EVO have problems making 800-1000whp on their head? No and it's mostly the same as a 2g head (backwards and such yes) and nobody is autocrossing or dissappointed there?

Like I said before, this isn't my opinion or my facts, I'm simply stating what a reputable DSM shop in my area told me and is going to start doing shortly. (guess who that is.)

 

[92redman]

Leave it alone, don't use a 1G intake.

Well, the 2g head is a replacement head on a 1g. I would have went with 1g head, but I couldn't find a good one cheap enough. Since I already have my 1g intake manifold, it's not really an option to not use it.
Have 2g guys had good success with a stock head and 1g intake?

 

[Awdboost]

If you are keeping the 2G head you can get a manifold with 2G ports.. Any kind of turbulance and you'll lose HP.

 

[Staytuned]

Well, the 2g head is a replacement head on a 1g. I would have went with 1g head, but I couldn't find a good one cheap enough. Since I already have my 1g intake manifold, it's not really an option to not use it.
Have 2g guys had good success with a stock head and 1g intake?

Here's a pic I post everytime I see someone think of porting a 2G head for a 1G intake manifold. Notice that the port has to be lowered to be port matched...thus the angle at which the air hits the valve is flattened out more = bad IMHO.

You must be logged in to view this image or video.

 

[Eclipsei95cl]

I'm simply stating what a reputable DSM shop in my area told me and is going to start doing shortly. (guess who that is.)

Well ur from canada so im guessin Magnus...

 

[paul s]

I'm using a 2g manifold that has been extrude honed and a 1g T/B( 64mm ported) and the car works awsone.

 

[EclipseGSX012]

wow sorry for bring from the past but thanks for the good information!