1991 gts Looking to tune without turbo.

[Verbstheword]

I have a91 gts and I'm looking to add some aftermarket. Parts for speed and a smoother ride. Any suggestions will help.

[MR2Jedi]

If you want to retain a comfy, smooth ride, I would stick with the OEM suspension.
Not familiar with what engine the a91 has, but if you want to stay away from forced induction, then cams, more fuel, a header,exhaust and intake are the way to go.
raising compression via forged pistons is also an option.(expensive option.)

[Verbstheword]

Alright i have an intake and exhaust. i was looking for cams but unfortunately i cant find them on any website i go to. the headers i have found, the only thing is they may cause the car to fail California smog check. But I did want to change the compression as well.
Thx for your input. Its greatly appreciated.

[Verbstheword]

Bump for feedback.

[jlspec]

Get front & rear Strut bar and some lowering springs like the TRD ones. OEM struts should do fine but due to age you'll need some new ones. Also replace the bushings or get performance one. Get a good set of tires and you should notice a big difference.

Performance wise you won't get much out of the 5S-FE. With headers you'll not pass smog. If you did get a set of headers check the welds and make sure the collector from the header to your cat back system is the same size. Notice I said cat back system, because you'll need a complete system just not the muffler. If im correct the Gen 5 5S-FE still runs on a AFM, if so upgrade to a map system or a something like the HKS VPC and remove the the AFM.

[Verbstheword]

Damn so I need to redo my whole 3inch piping?

[MR2Jedi]

3 inch piping is too big for the stock or even lightly modified 5sfe. Torque will suffer. I would stay with 2.5-2.75 max.
There are some companies that do a hard weld and cam grinds for the 5sfe.
personally, I would get a hold of a 3sgte head and go that route. Lots of aftermarket performance parts for that head.

[alltracman78]

3SGE/GTE head requires different intake and exhaust manifolds, and I doubt the 5S ECU will run it very well.

Originally Posted by jlspec

Performance wise you won't get much out of the 5S-FE. With headers you'll not pass smog. If you did get a set of headers check the welds and make sure the collector from the header to your cat back system is the same size. Notice I said cat back system, because you'll need a complete system just not the muffler. If im correct the Gen 5 5S-FE still runs on a AFM, if so upgrade to a map system or a something like the HKS VPC and remove the the AFM.

No 5SFE has an AFM, they're all MAP based.
You can install a 98? up Camry 5S manifold, it's an upgrade from the older ones and will pass smog [the cat is part of the manifold].
It won't bolt to your exhaust though, you'll need to finagle the pipe a little bit. You should be able to pass smog with that.



Before you dump loads of money and time into the 5S, IMO you're much better off swapping a 3SGTE into your car. It will cost you less and give you more power.
And IF you can find a US 2nd gen 3SGTE it's a legal swap. Even if you use a JDM engine there are ways to make it pass a real smog check.

[Verbstheword]

Alright so where can I get a 3gste ? And how much would I be lookin at for installation? But as far as the car I have now everything on it is how it was when I bought it except the color and rims. The person who owned the car had a stage 2 clutch in it when I bought it but on the way home it went out so now I'm riding stock until I put my clutchmaster in.

[RobMilkshakes]

either in a partout or a japanese engine importer. Sourcing a halfcut from the latter is usually the best bet, as long as it is a trustworthy company.

[alltracman78]

First off, if you have an auto it's going to be harder and more expensive to do this. Just FYI.

It's going to be very hard to find a US engine. Not very many cars were sold with them. Just so you know what you're up against.

You should be able to finagle a JDM engine to pass emissions, though technically it's not legal, so someone that really knows these engines [not many people] and really wants to dig could find something.

Doing a basic swap will probably cost you somewhere between $1500 and $3000, depending how much you pay for stuff and how much work you do yourself.

You really don't need a half cut [AKA clip], your engine is in the same family as the 3SGTE, and the wiring is similar, so you don't really need anything from the Celica other than the engine, harness and ECU. The only benefit to a clip [if you get a Celica clip] is if you get the hood, then you can use the factory intercooler.

In addition to getting a Celica [ST185/Alltrac/GT4] engine you can also get an MR2 engine.
The advantage to that is you can use the transmission [you can't use the Celica transmission], but the disadvantage is everything on the engine is set up for an MR2, which is different than a Celica.

I'm going to send you a PM with more info.

[jlspec]

A JDM engine will not pass smog in California unless he install the EGR which he will have to source from a USDM head. CA smog test is very strict. They test emissions, EGR, visual test, gas cap, vac lines (part of the visual), and maybe some other stuff.

[alltracman78]

The only problem he'll have is with the EGR.
The JDM engine will pass everything else.

Source an EGR valve, tube, VSV with connector/pigtail and modulator.
Drill the hole for the EGR in the intake manifold [don't need to drill the head].
Glue bolt heads to the tube flange where it normally bolts to the head.
Cut a hole in the bottom/backside of the tube [where it's not visible from the top of the engine]
Mount everything.

The EGR will be visually there [including the wiring, which can just hang down under the intake manifold].
It will also pass a function check because when you open the EGR valve with a vaccuum pump it will allow air to flow into the hole you cut, bypassing the AFM. This will cause the engine to stumble/die.

Any other questions?