GA16i TO THE MAX!!!

GetsomeGOJO · Jun 30th, 2004, 06:15 PM

Well, ok, maybe not the max. For followers of my saga, My timing chain slipped and so I'm currently in the process of rebuilding the upper end. I don't know a lot about it but I'd love to hear some more ideas to improve the motor during the rebuild.

Right now, I've ordered a Euro-cam. I need to know more things to do!

Could I port and polish the intake manifold? Anybody know what kind of gains that gives? Could I get a bigger Throttle Body and Injector?

If it's gotta be grounded for a while, I might as well make the most of it.

J.

minute rice sentra · Jun 30th, 2004, 07:03 PM

Go GA16DE!

GetsomeGOJO · Jul 1st, 2004, 07:40 AM

Everyone I've talked to says it's too much of a PITA to bother with... I'd rather save my bread and brain for a CA18DET swap.

Galimba1 · Jul 1st, 2004, 10:12 AM

Quote:

Originally Posted by GetsomeGOJO

Well, ok, maybe not the max. For followers of my saga, My timing chain slipped and so I'm currently in the process of rebuilding the upper end. I don't know a lot about it but I'd love to hear some more ideas to improve the motor during the rebuild.

Right now, I've ordered a Euro-cam. I need to know more things to do!

Could I port and polish the intake manifold? Anybody know what kind of gains that gives? Could I get a bigger Throttle Body and Injector?

If it's gotta be grounded for a while, I might as well make the most of it.

J.

Yeah, port and polish the head. The intake and exhaust runners could use a little smoothing. Do it while its off. Not sure about a bigger injector. I asked around last year and couldn't find anything. I think the GA16DE intake mani
fits close, but not quite. If you could figure out how to fit that up, and then get a 91+ ecu/harness adapted to the engine, let me know. Then get a Hotshot exhaust header and fit it up.

nickthegenius · Jul 1st, 2004, 10:41 AM

Quote:

Originally Posted by Galimba1

Yeah, port and polish the head. The intake and exhaust runners could use a little smoothing. Do it while its off. Not sure about a bigger injector. I asked around last year and couldn't find anything. I think the GA16DE intake mani
fits close, but not quite. If you could figure out how to fit that up, and then get a 91+ ecu/harness adapted to the engine, let me know. Then get a Hotshot exhaust header and fit it up.

For the GA16DE idea, get a head, intake, all FI-related parts, and ECU and you should be set. From what I understand, the shortblock is pretty much the same between the two.

If you stick with the GA16i, I would p/p the head, install your Eurocam, get a GA16DE header, and a good exhaust system. I don't know what the compression is on these engines, but you might be able to mill the head a little to bump the compression up, but then you will be stuck with running higher octane fuel.

BTW, I will be posting pics of my header install. Mine is meant for a B14, but with a little modification everything is looking good and I should have the exhaust on Saturday. I'm installing the header and then towing the car to a local muffler shop to have a complete 2" system done.

Also, I have Dropped89's old Eurocam and it doesn't even look worn at all. He said he only drove something like 50 miles after the install and the engine died (not due to the cam but over revving). I'll take some pics of that install too, but that is last on my list of things to do right now.

Here is what I'm installing:

GetsomeGOJO · Jul 1st, 2004, 01:15 PM

I already have a HS Header installed... I was asking for intra-motor ideas.

http://www.nissanforums.com/showthre...t=ga16i+ga16de

This is the thread that convinced me that a GA16de head was a bad choice.

++PLUS++
I'm buying the Dropped89 from Josh and using it as a parts whore. He has a freshly rebuilt "i" head that I can use while I rebuild my own/mess with it. I'm excited about some of the other goodies contained theirin as well. Like the suspension.... Mwahahahahaha!

Mervic · Jul 2nd, 2004, 03:56 AM

After pulling out a GA16DE head of an NX1600, I really think that you can use it to replace the Ga16i single cam head. Of course you will also need the ECu and engine harness to use the MPFI set-up. You will also need all or most of the emmision crap. I can also confirm that there is no valve relief cut on the pistons of the GA16DE which makes it even possible to use the 16DE cylinder head. You probably gonna need the timing chain of the GA16DE since it has an extra cam pulley to turn both cams. BTW, I would not recommend shaving the head since it will create a slack on the chain and might cause timing problem. Mill the head if it is warped and deck the block to create a perfect seal, that I recommend.

Galimba1 · Jul 3rd, 2004, 01:14 AM

Quote:

Originally Posted by Mervic

After pulling out a GA16DE head of an NX1600, I really think that you can use it to replace the Ga16i single cam head. Of course you will also need the ECu and engine harness to use the MPFI set-up. You will also need all or most of the emmision crap. I can also confirm that there is no valve relief cut on the pistons of the GA16DE which makes it even possible to use the 16DE cylinder head. You probably gonna need the timing chain of the GA16DE since it has an extra cam pulley to turn both cams. BTW, I would not recommend shaving the head since it will create a slack on the chain and might cause timing problem. Mill the head if it is warped and deck the block to create a perfect seal, that I recommend.

No, I've gone over this earlier. The GA16DE head will fit, but you have to replave the pistons. YOu're better off replacing the whole engine.

GetsomeGOJO · Jul 3rd, 2004, 08:03 AM

My original entry said I was interested in getting the most out of my GA16i. That's where I stand! If I wanted a GA16de I would have said so

(Believe me... If I had the money for a swap, it would be a CA18DET) It's as much a learning experience as it is a desire to see a bit more out of my baby. I'm just really happy learning all about the engine I have. When I know this one backwards and forwards, then it'll be time to start thinking about a swap.

Metal Mouf · Jul 3rd, 2004, 09:03 PM

Dont trip potato chip....

astreamk1 · Jul 3rd, 2004, 09:22 PM

Quote:

Originally Posted by GetsomeGOJO

My original entry said I was interested in getting the most out of my GA16i. That's where I stand! If I wanted a GA16de I would have said so

(Believe me... If I had the money for a swap, it would be a CA18DET) It's as much a learning experience as it is a desire to see a bit more out of my baby. I'm just really happy learning all about the engine I have. When I know this one backwards and forwards, then it'll be time to start thinking about a swap.

If it were me, and I was going to squeeze my Ga16i, I'd do the obvious, Air intake (you'll have to make), use a GA16DE header and get a decent flowing 2 inch exhaust. I am sure the Euro cam has to help somewhat, hopefully Nick can enlighten us on that one soon. If you have the motor out, I would look into getting the flywheel lightened . Past that, you are probably going to have to look into getting the head/intake ported/polished.

Hope that gives you some ideas.

GetsomeGOJO · Jul 4th, 2004, 01:03 PM

Quote:

Originally Posted by Metal Mouf

Dont trip potato chip....

^^^^^
Unhhhgh??

Ja, Ja, the intake is a good addition.... Still, outside of the actual engine however. That's a good thought about using a "DE" manifold though I suspect that the "I" throttle body and injector unit might not function properly if it were lying on it's side. That seems to be the main reason that most intake systems for our mighty mite include a 90* bend off of the top of our existing throttle body.

Flywheel lightning is, sadly, not an option as I'm only doing head work right now. Still, a good idea!

Does anyone know anything about high performance valve springs? A lot of high displacement domestics have them but I dunno about our lowly GA16i...

minute rice sentra · Jul 4th, 2004, 01:21 PM

Think he's talking about exhaust manifold, using a header made for a B13.

GetsomeGOJO · Jul 4th, 2004, 01:35 PM

I already have a HS Gen IV !!! I guess my signature or something should reflect that... (though I did mention it earlier in this thread!!!)

Mervic · Jul 5th, 2004, 12:04 AM

If your doing some headwork dont forget the valves. You would not need different valve springs since your not changing the cam. If you get the head flowing better after porting, the tiny stock valves need a lot of attention to get the potential of your worked cylinder head. A five angle valve job will be beneficial and maybe custom valves or use the SR20DE ones since they are bigger. With header, intake, exhaust, Euro cam and higher flowing cylinder head you will have a decent 16i. BTW, I also think that the Unorthodox Pulley for the GA16DE will work on the 16i as well. It's good for a few additional ponies. Also, you can advance the timing to 10 degrees(stock is 7) and get more mid HP. According to Dropped89, anything past 10 degrees you are not gaining anymore and risking detonation. He got that info when he dynoed his car a few years ago.