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 Post subject: 4G61 vs 2g heads
PostPosted: Mon Aug 19, 2013 8:24 pm 
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Some call me a god

Joined: Tue Nov 12, 2002 1:08 am
Posts: 1477
Location: Cleveland
I have done some searching and have come up empty handed. With Curt brown and his magic fairy dust bringing 2G heads into popularity-it has me thinking about 4G61t heads since the look, well about the same! Has anyone compared them back to back-or at least side by side?

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Aug 21, 2013 3:34 pm 
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Some call me a god

Joined: Thu May 05, 2005 2:31 am
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Location: Commerce City, Co
Last time looked it was like a 2g head. I have never measured the ports with a graduated cylinder, but the gaskets are the same. Measure the volume if you have access to both and let us know. All I have access to is a 1G head.

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Aug 21, 2013 5:00 pm 
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Some call me a god

Joined: Tue Nov 12, 2002 1:08 am
Posts: 1477
Location: Cleveland
Quote:
Last time looked it was like a 2g head. I have never measured the ports with a graduated cylinder, but the gaskets are the same. Measure the volume if you have access to both and let us know. All I have access to is a 1G head.

I have a 4G61 head-I will grab a 2g that a buddy has on the shelf

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95 Mirage AWD - "HoboEvo" 1008 awhp 9.5@165
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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Aug 21, 2013 5:08 pm 
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2nd Banana
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Joined: Wed Dec 28, 2005 1:16 pm
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Location: San Diego, CA.
This may seem like a stupid comment, but has anyone ever successfully bolted a 4g61 head onto a 4g63 block? Isn't the bore size quite a bit different? It would raise compression as well, not that that's a big deal.

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Aug 21, 2013 5:13 pm 
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Some call me a god

Joined: Thu May 05, 2005 2:31 am
Posts: 1789
Location: Commerce City, Co
Yes. The car did not seem to run any different.

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Aug 21, 2013 5:44 pm 
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Some call me a god

Joined: Tue Nov 12, 2002 1:08 am
Posts: 1477
Location: Cleveland
Quote:
This may seem like a stupid comment, but has anyone ever successfully bolted a 4g61 head onto a 4g63 block? Isn't the bore size quite a bit different? It would raise compression as well, not that that's a big deal.
Yes and there is no physical reason it would not work (unless you had some fancy pistons. ):)

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Thu Aug 22, 2013 12:56 pm 
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CSM Junkie
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Joined: Sat Feb 01, 2003 1:54 pm
Posts: 700
Location: Watertown, WI
Though I really have nothing of value to add, I am anxious to hear what you determine JP.
I got a fully machined 61T head still in plastic from the machine shop after the rightful owner left the bill unpaid for over 2 years.
For $50 I figured it would be a nice ready-to-run spare. 8)

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Thu Aug 22, 2013 3:21 pm 
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2nd Banana
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Location: San Diego, CA.
Would be fun to pair it with a EVO I-III intake manifold. I think it would be pretty cool to try it out.

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91 GSX - 511fwhp and 352 lb/ft 25psi 110 octane, 7.68 @ 95.9mph 1/8th 21psi 91 octane, 11.93 @ 112.9mph, 117.7mph best trap speed, 20psi 91 octane
98 Volvo S70 T5 - DD

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Thu Aug 22, 2013 3:26 pm 
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Some call me a god

Joined: Tue Nov 12, 2002 1:08 am
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Location: Cleveland
Quote:
Would be fun to pair it with a EVO I-III intake manifold. I think it would be pretty cool to try it out.

Find me one-I'd be glad to try it :)

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95 Mirage AWD - "HoboEvo" 1008 awhp 9.5@165
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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Thu Aug 22, 2013 8:01 pm 
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Some call me a god
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Joined: Sun Oct 16, 2005 8:02 am
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Location: Eva, Alabama
I'd like to see this done with the runner fill and a cyclone intake...

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Thu Aug 22, 2013 10:30 pm 
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The Silent Administrator
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Joined: Wed Dec 24, 2003 3:32 pm
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Location: Ottawa, ON, Canada
Search up lancerman s posts and you will find his head combination, block and intake setup. He was holding his own with high end street bikes on the highway!


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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Sun Aug 25, 2013 4:48 pm 
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The Silent Administrator
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Joined: Wed Dec 24, 2003 3:32 pm
Posts: 9524
Location: Ottawa, ON, Canada
Just took measurement of the ports on a 4g61t, 4g63t 1G heads and a Cyclone dual runner intake manifold.

http://s483.photobucket.com/user/ColtRo ... t=3&page=1


I also have a 4g61t head (as pictured in the album) that is in perfect working order, fresh machine work and then low miles run before teardown. Just machined the 1G head going back on the 4g63t in the car. Decisions.

No access to a graduated cylinder to check volume of the actual virgin intake ports on the 4g61 head.


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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Mon Aug 26, 2013 12:06 pm 
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Some call me a god

Joined: Thu May 05, 2005 2:31 am
Posts: 1789
Location: Commerce City, Co
No measuring cup or mixing cup with fluid increment lines in the kitchen?

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Sep 04, 2013 1:38 am 
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Spends Too Much Time Under The Hood
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Joined: Fri Mar 22, 2013 2:25 am
Posts: 352
Location: Denver, Co
If you want a cylinder head with the ports like the 2g, just go for the Hyundai 4g63 (g4cp) cylinder head, they have the shape of a 1g head with the bolt holes ready for 6 bolt and the ports are pretty much like 2g's...

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 Post subject: Re: 4G61 vs 2g heads
PostPosted: Wed Sep 04, 2013 6:11 pm 
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The Silent Administrator
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Joined: Wed Dec 24, 2003 3:32 pm
Posts: 9524
Location: Ottawa, ON, Canada
Quote:
No measuring cup or mixing cup with fluid increment lines in the kitchen?
Hadn't thought that far into it. Great idea! I do have something kicking around here, I'm sure.


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