Max a 16v 4AGE can be tuned to?

Posted: Sat Apr 18, 2009 12:24 pm Post subject: Max a 16v 4AGE can be tuned to?

Hey guys,

I went around the main areas in Colombo to find a 4AGE 20V but ended up just getting sun burnt. So I'm just wondering..

How much can a 16V 4AGE be tuned to give out. As mine is a JDM 16V its supposed to give out around 130hp stock.

So what's the max power this engine can give when mod'ed?
how much?
what parts?

thanks,
Heshan.

Posted: Sat Apr 18, 2009 1:45 pm Post subject:

Depends on what way you would be going and what cash you're willing to spend on it. Wink

350 - 400 HP is the highest I've heard of... But then you're talking about a heavily modified 4AGE with a large turbo and low compression pistons...
Keeping it NA you should be able to get till 160HP without too much trouble and money and anything above 200HP will cost you a small fortune. Very Happy

Better read the Billzilla guide to get the idea:
http://www.billzilla.org/4agmods.htm

Posted: Sat Apr 18, 2009 3:24 pm Post subject:

Easy,
how much money you got?
Anything is possible with $$$

Posted: Sat Apr 18, 2009 4:33 pm Post subject:

exact reason why I put up the topic. Need to figure out how much of money is needed to mod it to maybe 180hp from the stock engine. Smile

I read the entire article Banpei posted earlier and its quite unbelievable that a stock 16V can be mod'd to have more HP than a blacktop. But still I'm trying to figure out how much and how. I'm trying to run away from engine issues I'm having with my 16V hence the reason for me to search for a BT as its a newer model and easier to find parts for it than the 16v.

Posted: Sat Apr 18, 2009 5:11 pm Post subject:

20v complete head with 7a bottom end with silvertop rods & a bit of effort,
or 20v with overbored block & dirty datsun ca18 83mm pistons. It all depends on what you can do or you local engine shops & parts avilability.

Posted: Sat Apr 18, 2009 5:36 pm Post subject:

well I can tell you now that the mechanics here in SL will not have the experience to do that so I'm going to forget about that. but I think I might get the BT as it'll give me a better start of around 150hp with the 95 octane we have here.

So according to the Banpei's article putting new Cams will make a huge difference in making the power increase from around 150 to even 200. So what's the best of cam's around for a good price?

any recommendations through experience?

Posted: Sun Apr 19, 2009 11:58 am Post subject:

Both 20V and 16v head have pretty much the same max hp level.
Older 16v have weaker low end, but if you switch to 4AGZE internals 16v can be as much as powerful.

I think it costs the same to pump BT or 16V to 200HP.

What makes the biggest difference in my opinion is the fact that BT will offer 150+ hp both street and track drivable in stock form.

But, if you plan more, 16v or 20v... looks same to me. Maybe 16v is even better, much more people using it, more expirience, more parts..

Posted: Sun Apr 19, 2009 4:03 pm Post subject:

hmm.. interesting.. But doesn't the ITB's and the VVT give some sort of additional tuning capability that the 16v TVIS versions don't have?

It seems quite illogical (not doubting what you guys are saying but just arguing with myself) that a engine with a base HP of around 150 can be tuned to 200hp at the same price as a older less technologically advanced engine such as the 16v.

Posted: Sun Apr 19, 2009 4:05 pm Post subject:

also guys anyone out there with a spare 20v? for a dirt cheap price???

Posted: Mon Apr 20, 2009 1:29 am Post subject:

There are ITB's for 16V also, which you can easily put on bigport for the price difference between BT and 16V.
Also, VVTi is great but it makes better low and mid range response and not the high end power.

Iketani Joined: 20 Feb 2006 Posts: 27 Location: Norway

blacktop 20v
toda 304/304
toda valve springs
toda campulleys
toda headgasket
stock bottom end
engine management

approx 180-190hp if everything else is right

please try to use a 16v to obtain the same hp at this price

with an experienced engine builder and a big budget I would say 250-260hp is maximum possible for both 16v and 20v

turbo? I've seen over 500hp on a stock gze bottom end

Posted: Mon Apr 20, 2009 4:42 pm Post subject:

Iketani Joined: 20 Feb 2006 Posts: 27 Location: Norway

Posted: Mon Apr 20, 2009 7:55 pm Post subject:

You are forgeting silly little thing called start cost Wink

.
BT is like 1000e more expensive and needs fabrication to get into AE86 chassis. Just for putting in an BT in Hachi you can get pistons, cams or itb's.

Of course, noone sane would swap an BT with 16v, but if you start with 16v, and we all have bluetops at the begining, i think it's better to crank up 16v.
Swapping to BT and then tuning it is most expensive option.

Posted: Mon Apr 20, 2009 11:26 pm Post subject:

Posted: Tue Apr 21, 2009 7:01 am Post subject:

Posted: Tue Apr 21, 2009 9:35 am Post subject:

Posted: Tue Apr 21, 2009 10:34 am Post subject:

awesome.. Thanks Uzelac.. I'll do some research on the drivability issue with the increase angle.

Wataru Joined: 18 Aug 2008 Posts: 110

love these topics about how to build a 4AG...

The early bigport 4AG can flow the most hp out of all the 4AG heads.
If you are planning to build your blue top.
I would suggest you get yourself a 7 rib block.
Internal of the early model 4AG are not strong.

If you want a cheap way to build a 16V
I would suggest you do following
a silvertop bottome end.
Use it's crank and rod.
Its strong enough to rev up to 9 everyday, providing you look after the motor properly.
if you are tight, then use some small port pistons. They offer a better compression than your big port ones. They are dirt cheap comparing to TODAs or other japanese brands.
You should note that running BIG cams on the 16V meaning you will need some underbuck and shim kit..... which will cost you AN ARM or your kidneys.
I wont even port out the bluetop, just give it a quick polish...
And then run some ITBs off a silver top.
Remember to shave your head and deck your block too to get a better compression, you have at least 7mm of valve clearance.
Doing all that you will be lucky to get 150hp on your crank
(providing your cams are like baby cams)
you will be able to run stock computer that way.

I note that you guys have only 95 octane juice over there......
maybe its worth while running a black top after all.
it would be better off for you for daily use.
and it sounds awsome too Smile

Anyway, good luck.... hope this won't turn into a project with a dead end.

Posted: Tue Apr 21, 2009 8:31 pm Post subject: