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3.5 6G74 Swap Discussion

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#3,062 ·
Someone had said the Ripps did not fit because of the starter also. I would measure the headers clearance on a a 72. The 74 is about 18mm taller deck but that only translates to about 16mm movement directly up. So if you have 16mm+ clearance between your headers and the starter or oil pan then I would say you are ok.

My cars sounds deeper now than it did with the 72. My co-workers noticed right off with out me saying anything to them how much fuller and deeper it sounded. I have a Greddy SP2 BTW
 
#3,063 ·
GSXROFDFW said:
Someone had said the Ripps did not fit because of the starter also. I would measure the headers clearance on a a 72. The 74 is about 18mm taller deck but that only translates to about 16mm movement directly up. So if you have 16mm+ clearance between your headers and the starter or oil pan then I would say you are ok.

My cars sounds deeper now than it did with the 72. My co-workers noticed right off with out me saying anything to them how much fuller and deeper it sounded. I have a Greddy SP2 BTW
Click to expand...

Oh cool what headers are you running?
 
#3,066 ·
Michael Star said:
Can you use the stock Fed Spec mainifolds?
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I think I heard you can use the 3.5 stock manis and they bolt up to the 3.0 downpipe just fine, but dont quote me on it.
 
#3,067 ·
im doing obx short tubes with my swap. ill post a vid when its done.
 
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#3,068 ·
My next question is about trannys. Im running the auto and Ive read that some people have trouble with the auto+3.5. What I am wondering if the galant tranny is the same as the eclipse, and if you can run the tranny ecu from the galant.
 
#3,069 ·
yeppers, you just have to make sure if there is an immobilizer that you need the proper key to make it work. the auto will handle the 3.5 just fine until you begin really making good torque with it. but even then just get an oil cooler that's better than the one provided since it taps into the bottom of the radiator and put a small fan on it. you could also upgrade the torque converter to aid in getting the power down.
 
#3,071 ·
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#3,073 ·
Silvertune said:
Anyone know a source for the 6g74 GDI? It was used in the japanese diamante and montero during the mid 90's so I can't imagine it would cost a whole lot outside shipping (in relation to some of the other engines anyway).
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sigh.... :facepalm:
 
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#3,077 ·
so most of you know im getting my shit done. should have it all back soon. im going to install the ported and polished 74 heads first, see how it goes and then possibly end up with some ported 75 heads, building the headers, installing the 75 crank and decking the pistons to a 0cc flattop. again this should make for a 14:1 CR motor with the 74 heads on because of the small combustion chambers. ill be running a water/meth injection setup and possibly going E85 with some STi pink injectors for street duty. track duty injectors will depend on how my duty cycles look at peak torque and how they look at the top of the rpm band. ill also be moving up my rev limit to 8k to take advantage of the intake flow characteristics and the heads.
here are some pics of the work thusfar
 

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#3,078 ·
boostzealot said:
so most of you know im getting my shit done. should have it all back soon. im going to install the ported and polished 74 heads first, see how it goes and then possibly end up with some ported 75 heads, building the headers, installing the 75 crank and decking the pistons to a 0cc flattop. again this should make for a 14:1 CR motor with the 74 heads on because of the small combustion chambers. ill be running a water/meth injection setup and possibly going E85 with some STi pink injectors for street duty. track duty injectors will depend on how my duty cycles look at peak torque and how they look at the top of the rpm band. ill also be moving up my rev limit to 8k to take advantage of the intake flow characteristics and the heads.
here are some pics of the work thusfar
Click to expand...
I'm liking your work. :yesway::yesway:
 
#3,079 · (Edited)
Whoever did your heads did good work as they look very similar to mine! Your lower manifold was done really good too. Now make sure I get this right... You have the 3.4l surge tank that you can seperate from the shortened runners which have now been serious ported and polished. And what we're looking at in the pick is the lower manifold with just the runners on it correct?

I agree with finesse! Awesome shit, I can't wait to see what the 74 is fully capable of. 8k RPM's! You'll be runnin what I've been dreaming of for the last 6 months!

One question for you boost, how short did you make the runners? Or better stated which is better for FI, shorter or longer? I think I get the characteristics of the tank, but the runners still interest me.
 
#3,080 ·
boostzealot said:
so most of you know im getting my shit done. should have it all back soon. im going to install the ported and polished 74 heads first, see how it goes and then possibly end up with some ported 75 heads, building the headers, installing the 75 crank and decking the pistons to a 0cc flattop. again this should make for a 14:1 CR motor with the 74 heads on because of the small combustion chambers. ill be running a water/meth injection setup and possibly going E85 with some STi pink injectors for street duty. track duty injectors will depend on how my duty cycles look at peak torque and how they look at the top of the rpm band. ill also be moving up my rev limit to 8k to take advantage of the intake flow characteristics and the heads.
here are some pics of the work thusfar
Click to expand...
:agreed::agreed::agreed::agreed::agreed::agreed::agreed:

Hell yes! Good to see progress on this man!
 
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