New engine or Rebuild ? - Toyota Nation Forum : Toyota Car and Truck Forums

Jzs147-RR · 03-21-2003, 08:18 AM

Hi guys im wondering if its worth it to keep my stock engine and rebuild it or just go 20V or GZE .I have found 3 silvertop 20v's for 900$+ and one 65 000km GZE for 800$ only problem is most likely parts will be missing and its alot of custom fitting for those 20 valves.I was also thinking about a small port 4age but is it worth it?I dont mind spending more cash to have a good car with some added power.

Any opinions would be apreciated..

Btw anybody have fenders for sale ?

uras · 03-21-2003, 10:34 AM

i'd say in ur case, just rebuild, and do everything right, to ur liking and over time since u'r very familiar with engine mechanics and rebuilding engines...

and then hook me up with the 65km GZE for $800!!!

btw, whut does that $800 include?
harness, ecu too?

Jzs147-RR · 03-21-2003, 10:36 AM

I think the GZE has no ecu and a cut harness that is why I have no jumped on it yet ..

Anybody got a price range for a total rebuild kit and piston set ?

goodcookiedrift · 03-21-2003, 10:57 AM

the first thing i would do before jumping into any of those options, is to ask your self: what kind of power or characteristics you are looking for?

becasue all three engines are drastically different in terms of their torque curve and their personalities.

gze is great for mid range power...its also the torqueist of the three. good entry level engine for the track and always have the option of turboing. you'll beat the rest of the 4age'rs off the line but won't have that unlimited rpm range like a small port with dual valve springs!

20v is pretty much a b16a. it shares alot of similarities with many of the b series engines: high strung, moderate power and peaky peformance. perfect engine if you are looking for a plug and play engine for the track...can also turbo this baby too.

small port is pretty much the same as a big port except with a litte more punch. of course you can always tune the big/small port 4ages to your liking...thats the route i went (big port head on high comp short block, cams, valves, and carbs.)

in any case, all the swaps aren't like a b series swap into a civic. they each need a fair bit of reworking and customization for them to fit into the ae86. you seem to know pat and the rest of the 4age flq's

and pick their brains.

nick

boroEF · 03-21-2003, 11:02 AM

but cant a small port be directly droped into his car with the ecu?
harness should be the same as the bigport...

or am i wrong o.O

Jzs147-RR · 03-21-2003, 11:51 AM

Ya im looking for a well rounded car with good power in the mid and lots of top end.The GZE is nice but I like my RPM being an ex Honda driver I miss that part of driving.Only problem I see with the 20 valve is the cost of parts in the futur and much more custom fitting then the GZE.BTW would the stock 20 valve ECM even work with the stock AE dash and tach ?How many people have done this swap around anyways I would love more info.

Flashmn · 03-21-2003, 01:13 PM

Plus you might have to rebuild the new engine too.

Lafora · 03-21-2003, 04:27 PM

Quote:

Originally posted by boroEF
but cant a small port be directly droped into his car with the ecu?
harness should be the same as the bigport...

or am i wrong o.O

small ports are FF configed
his big port is FR configed.

think plumbing shaun, even tho both are 16V, it's not as easy as most ppl make it to be.

Jzs147-RR · 03-21-2003, 06:47 PM

I guess I will just rebuild this one and see what hapends.Right now its running but at 300 000km its on its last days.How much power can I get from the bigport NA ?

Skeetzilla · 03-22-2003, 01:55 AM

i had the same question, but not the cash. i opted for a rebuild. i should be driving my 86' tomorrow afternoon if everything goes right. its been long since i've driven it. though my 86 is the SR5, down here its very hard to find a decent GTS. though i'm still in the market. so i basically just rebuilt my 4ac. i'm about to find out how that went.

Jzs147-RR · 03-22-2003, 11:53 AM

Do you guys think I could fit the sc12 onto the bigport ?Maybe that could give me some extra power..

goodcookiedrift · 03-30-2003, 11:47 AM

Quote:

Originally posted by Jzs147-RR
Do you guys think I could fit the sc12 onto the bigport ?Maybe that could give me some extra power..

to answer your questions:

the most a big port can probably get is around 240 hp.

that would be the far extreme with it running 320/304 cams, fully rebuilt head and valve train system, ITB's or carbs 12:1 comp, over bored, balanced and blueprinted, dry sump sytem and all.

in other words...lotta cash and little reliability.

otherwise, you the hp rating on a big port in general will all be dependant on your cam profile and the accompanying setup.

in my ex-example, high comp block on a big port head with carbs and 304 cams and yadyadyadya would rate around 190 - 200 hp...not exactly a great daily driver by modern day standards, but it would fly on the track.

as for an sc12 on a big port...not worth it. everything needed to fit a supercharger on a big port NA engine could be accomplished alot easier by doing a gze swap. and in any case the sc12 on a gze would share very similar characteristics, except for a bit more peakiness in the big port...nothing drastic though.

20v are expensive and time consuming to do especially if you don't have much experience with these engines. but if you want high strung FI out the box...its the way to go.

and no, small port ecu's do not work on big port engines and vice versa...for one, the injectors are different.

maybe its not what you want, but my suggestion is to focus on suspens and drive train on the ae86.

its one of thsoe cars where even piss poor power seems fun if you have a kick ass susp setup, a nice 1.5 lsd and some wide ass but small rubber. if i could turn back the hand of time, thats the way i would of went with...wait, the car did have an awesome setup!

nick

Jzs147-RR · 03-30-2003, 11:58 AM

Well from what I can see I will keep my Bigport head and go with a 7rib block and go from there.As for the suspension and LSD that will come too cant have a drifter with a 300 000km suspension and screwed up Diff.Im looking for a place that would fix my body and give it a dam good paint job.Thanks for all the info I will keep all that stuff in mind.