what is the benifit or downfall of changing out a 2g intake manifold to a 1g intake manifold. Also how much improvement will a 1g throttle body make on a 2g? thanks

 

No improvement, it will actually cause a leak, being the 2g ports are smaller than 1g ports. If you change the intake mani you will have to change the head too. Or you can epoxi the runners in the 1g mani to match the 2g head. The only manifold worth the throuble would be a cyclone intake mani with dual runners.


Oh and if you change the throttle body, go with a 1g non turbo TB with the snout, its the biggest oem one you can get and it allows alot more air flow than the stock 2g.

Hope that helps!

 

what if i got a turbo 1g throttle body, wouldnt be better than my stock 2g?

 

first of all, a 1g (6-bolt) intake manifold wont fit onto a 2g head. the bolt holes do not line up.

second, as far as the throttle body, it would fit. BUT the hole is bigger than the opening of a 2g intake manifold, which would result in the air bottle-necking.

what you COULD do is put a 1g head on your stock 2g block, and therefore use the 1g intake mani and tb. plus, the 1g head flows a lot better than a 2g head.

 

so that means that the cyclone manifold wouldnt fit on the 2G head either right? and dont you have to drill holes on the 2G block to fit the 1G head? So really you cant put anything 1G (throttle body, intake manifold) on the 2G head anyway. no point unless you have a 6-bolt swap.

 

negative 6-bolt head bolts right up to a 2g motor. im actually in the process of doing that.

 

dont you get that mysterious "phantom misfire" issue if you put a 6 bolt head on a 7 bolt block....or is that a 7 bolt head on a 6 bolt block....in any case why dont u just go ahead and the whole 6 bolt swap and call it a day?

 

lol yea the six bolt swap, its definetly goin in when this motor goes.

 

it can happen when you swap a 6-bolt into a 2g period. I had it and I got rid of it, there are ways around everything