2g head on 1g?

[Kyromoto]

well I know the 1g head can be put in a 2g car but can it also go the other way around? since i need another head for my 1g gsx does it matter if I get a 1g or a 2g head? and what are the differences between them? like should i prefere one over the other? or should i just get the cheapest 1 i can find? any advice would be greatly appreciated

 

[crimsondragon]

Advice? Search a little bit. That's the best advice for anyone.
Here are some links that will answer your questions.
http://www.dsmtuners.com/forums/newbie-forum/134379-1g-head-v-s-2g-head.html
http://www.dsmtuners.com/forums/cylinder-head-short-block/224571-2g-head-1g-block.html

 

[gsxtasy]

Yes searching is good. For a quick answer, you dont want a 2g head on a 1g. Just find a 1g head and replace it, your intake manifold has bigger ports than a 2g head among other things, such as flowing more air than a 2g head.

Get a 1g head, period.

 

[Kyromoto]

ok thanks... will do

 

[absolute_DSM]

Yes searching is good. For a quick answer, you dont want a 2g head on a 1g. Just find a 1g head and replace it, your intake manifold has bigger ports than a 2g head among other things, such as flowing more air than a 2g head.

Get a 1g head, period.

Interesting.

A 2g head has smaller intake ports which means better air velocity at lower RPMs. (That equals low end torque) Sure it may not flow as much as a 1g head at higher RPMs, but how many daily DSM drivers are making 500hp at 8500rpm? With the low end, a 2g head is great for the street.

A 1g head - sure it has big ports. (Oh so it must be better!) Thats a common misconception in the automotive world - Bigger is better. Huge turbo, the highest duration cams, ridiculously huge FMIC, big 3 inch intercooler pipes, hogged out runners in the head, etc. Thats the reason lots of guys spending 20k on "big" mods ended up running slower than a guy that knows what parts to mix and match. The 1g head will be great for higher RPMs, it will flow more air. But not with the same air veloctiy at lower RPMs as a 2g head.

Well, Ill step off this here soapbox now. Happy Boosting.

 

[gsxtasy]

Interesting.

A 2g head has smaller intake ports which means better air velocity at lower RPMs. (That equals low end torque) Sure it may not flow as much as a 1g head at higher RPMs, but how many daily DSM drivers are making 500hp at 8500rpm? With the low end, a 2g head is great for the street.

A 1g head - sure it has big ports. (Oh so it must be better!) Thats a common misconception in the automotive world - Bigger is better. Huge turbo, the highest duration cams, ridiculously huge FMIC, big 3 inch intercooler pipes, hogged out runners in the head, etc. Thats the reason lots of guys spending 20k on "big" mods ended up running slower than a guy that knows what parts to mix and match. The 1g head will be great for higher RPMs, it will flow more air. But not with the same air veloctiy at lower RPMs as a 2g head.

Well, Ill step off this here soapbox now. Happy Boosting.

Yes i am well aware of all these points. Albeit i see no point in switching to a 2g head, while he already has a 1g block, and 1g intake manifold. The added velocity will be negligible at best, and considering he supposedly has a 20g on the car, i doubt he is looking for the ultimate street mannered car. If you really want to get into it, the 2g has more meat, thus letting it be ported to flow more and have better velocity than a 1g. However, as i take it he is just looking for the easiest/ fastest way to get a head on his car. Anyway, good luck!

-Aaron

 

[mitch26753]

i could write alot a few paragraphs about the pro and cons of both. Bottom line- 1g head is better. dont go with a 2g on a 1g bottom end. If i remember correctly you have to have it bored out so it will even fit the 1g block. When it comes to dsm's and 4g63's the 1g head stock vs. the 2g head stock, the 1g head is far superior-STOCK.
'

 

[gsxtasy]

And yes it does have to be machined for the studs to fit, another reason it would be easier than a 2g.

 

[Kyromoto]

wow thanks guys. its somthing to think about. I think ill just stick with a 1g head and put my lifters and rockers and cams onto it from my other head that is warped right now. is there anyway to sell a warped head for like scrap or if somone would have any use for it? if anyone is interested in it id be more than happy to sell it. just let me know. thanks.

 

[gsxtasy]

Depending on how warped it is, you may be able to mill it flat and make it usable? Maybe not.

 

[Kyromoto]

wait just thought of somthing else to. I dont know what kind of head studs i got but they look the same as the ARP studs and im guessing the guy who built this car would have put arp studs or the equivalent of them on the car. the head was already milled before from this guy so im guessing he warped it before and put the arp studs... so instead of spending 200+ on those studs that i might already have id rather see if there a way i can tell if i already have them. because theres no need to buy them if i got them ya know?

 

[Kyromoto]

they told me it was warped bad. and to re mill it again (after the builder of the car had it done) would be really hard and most likly it would just warp again. also the valves would be sticking out really bad... so the shop said it would be over 600 to completly fix that head. and thats way more then its worth

 

[mitch26753]

well you can pick up at set of arp headstuds for 60 bucks, but anyways to my knowledge i dont know that many companies that make studs. Really the only company that i know of is arp! i would say that they probably are.

 

[gsxtasy]

ARP head studs use a 14mm 12 point socket. If thats what your's use then they are ARP if not, then they aren't.

-Aaron

 

[Kyromoto]

ok thanks... yeah i got them then. good thing i can save a little extra money now.

 

[absolute_DSM]

they told me it was warped bad. and to re mill it again (after the builder of the car had it done) would be really hard and most likly it would just warp again. also the valves would be sticking out really bad... so the shop said it would be over 600 to completly fix that head. and thats way more then its worth

What "your" shop is saying is that your head is beyond the servicable limit. "Sticking out real bad" (as you seem to put it) means your piston to valve clearance is too close. Youre going to have contact when you run that head.

Get a different head!

could write alot a few paragraphs about the pro and cons of both. When it comes to dsm's and 4g63's the 1g head stock vs. the 2g head stock, the 1g head is far superior-STOCK.

Lets see your knowledge, where are your "paragraphs"?

Wanna see what 2g head can do with stock ports?
http://www.dsmtuners.com/forums/bolt-tech/281031-new-16g-dyno-numbers-c16.html

ok thanks... yeah i got them then. good thing i can save a little extra money now.

How do you know those ARPs werent overtorqued or stretched in some way?
Have you ever glanced at the ARP website? Over torquing is the #1 way bolts fail.

In the end, yes a 1g is definately easier in your situation, just go with one.

 

[DSMunknown]

Note that the Evo 8 ports are virtually the same measurements as the 2G turbo.

 

[Kyromoto]

thanks guys

 

[tim4g63fast]

Note that the Evo 8 ports are virtually the same measurements as the 2G turbo.

Yeah I have had this argment before back when I was green... IMO 2g head is better after learning a lot.

The evo is a prime example of what people are doing with those "smaller" ports.. lets face it most dsm'ers are not revving above 8k... if they were the 1g head might really shine. Look at the the evos are doing stock guys.. there is a lot to be said for good and poor port velocity

 

[Asimmons90GSX]

So basically your saying that newer technology has yielded better results?? hmmm....wow...that's odd. Imagine that.