2g head with 1g intake mani and TB will this work?

[GstRacer]

if you have a 2g head and put on a 1st gen intake manifold and throttle body will this work. I know you have to modify it somehow but how do you do it?? thanks a lot for any info.

 

[DSMJim]

if you have a 2g head and put on a 1st gen intake manifold and throttle body will this work. I know you have to modify it somehow but how do you do it?? thanks a lot for any info.

No it wont work. The 1g and 2g head ports are totally different so the intake manifold will not work. The throttle body will work on your manifold though and is a descent upgrade from 52mm to 60mm.

 

[CyberEye]

No it wont work. The 1g and 2g head ports are totally different so the intake manifold will not work. The throttle body will work on your manifold though and is a descent upgrade from 52mm to 60mm.

they're not "totally different" they're just bigger on the 1g intake. So the air would come through the intake and basically hit a bit of a wall before going into the head, causing an assload of turbulence. It will work, but you need to port the head to match the intake. Which is why I have a 1g intake sitting in a box in my basement. Waiting untill I have the time to pull the head off to do some porting.

 

[GstRacer]

so if i had my head match ported it would work right??

 

[Staytuned]

The porting needed to be done is all the wrong kind if porting. To make the 1G intake fit onto a 2G head you need to port out the bottom of the port on the head thus lowering the angle of the air coming into the head to the valve.

Here is a pic of a gasket on a 2g head...see the difference?

Pic here

 

[DSMJim]

they're not "totally different" they're just bigger on the 1g intake. So the air would come through the intake and basically hit a bit of a wall before going into the head, causing an assload of turbulence. It will work, but you need to port the head to match the intake. Which is why I have a 1g intake sitting in a box in my basement. Waiting untill I have the time to pull the head off to do some porting.

When it comes to the intake manifold they are totally different. There is absolutly no reason ever that you would put a 1g intake manifold on a 2g head. Hacking out the port by lowering the base just to put a 1g intake manifold on is the stupidest thing ever. Whatever you think you will gain will be instantly lost by slowing velocity of the intake and a hack port job.

If your bound and bent on getting a 1g intake manifold get a 1g head which I wouldn't do either. If you want a better intake manifold buy a Magnus or other sheet metal intake manifold and use a 1g throttle body. At least it's designed to work on that head and will yield much better results.

 

[blcknspo0ln]

damn... i find this thread AFTER i bought a 1g IM...

my impression was it was interchangeable, and beneficial. since the 1g IM is bigger.. oh well, now i have an even BIGGER paperweight.

 

[gixrman]

Don't feel bad I bought a 2g head off ebay and when it came....no cam caps wrote the guy back "ahhh yea there in a box somewhere I'll send them out as soon as I find them"

 

[GstRacer]

ok well here is another question can you use a magnus mani and still have all your emisions stuff?? i need them it sux i know but.... anyway can you use the magnus and still pass emisions?? if not how about just doing the road race extrude honed intake mani?? thats what i am thinkin about getting.

 

[DSMJim]

ok well here is another question can you use a magnus mani and still have all your emisions stuff?? i need them it sux i know but.... anyway can you use the magnus and still pass emisions?? if not how about just doing the road race extrude honed intake mani?? thats what i am thinkin about getting.

No you lose your EGR with the magnus manifold however if you only have a sniffer test no visual you'll likely pass anyway. I know lots of guys who pass here in Ontario with magnus manifolds. Our sniffer tests are pretty stringent too..

 

[GstRacer]

well last time i went through emisions they just plug in the obd2 plug not the sniffer

 

[notractiongst]

yea and if you have a check engine light you fail automatically

 

[DSMJim]

You will have one for egr then so yeah thats an automatic fail for you. Just keep your 2g manifld around and swap it when you ahve to test. If your every two years like here it's not that big a deal. Once you swapped an intake manifold once you can do it again in about 4 hours start to finish with the motor in the car.