Hi Guys, i'm the Proud owner of a 89GTUs and curious what else i can do to my N/A before i give up on it and go TII swap.

Its got a decent list of upgrades, but wondering if there is anything else i can try before i would have to tear down and re-port again for more power.

i know it can be tuned still, but wondering about other idea's first.

Tried lookin through the other N/A Posts and couldn't find anything.


my motor has:
Pineapple Racing Large Street Port
Pinapple Racing Street port Exhaust W/ TII Exhaust Sleeves
Pineapple Racing 6 Port Inserts
Pacesetter Header - Long Tube
High flow Cone Filter (Spectre)
Rtek 2.0 ECU (still on base map)
Cat Delete Pipe
2" Exhaust to Straight flow mufflers

Thanks for your help guys. would love to stay in the N/A world but having spent 2800 bucks so far is kinda depressing when a stock TII swap was cheaper

 

You could start by switching to something less shitty than a Pacesetter header. They do not have a very good reputation.

 

2" exhaust is a little small too.

also tuning the ECU should be your next step, makes a bigger difference than everything else you did

 

You should ditch the Pacesetter for an RB piece, and junk the Spectre filter in favor of a K&N drop-in replacement. Maybe re-route the intake piping to the fenderwell or in front of the radiator so it's not picking up engine bay heat.

That and a good tune should put you in a good position.

 

1. redo your exhaust
2. do some real tuning

 

Thanks guys, bought the Pacestter header because it was cheap. now i understand why lol.

So Goals with N/A before i give up completly (i really wanna stay N/A its kinda how i've gotten my name here in AZ)

1: RB Header
2: Dyno Tune Rtek


Now for tuning, i'm using the Stock 440cc Injectors. do i need to go bigger? or am i gonna be leaning the motor out anyways?? my Narrowband (garbage i know, but its what i've got) read very rich.

Thanks for your guys input!

 

This isn't engine related but proper tires and suspension go a long way towards putting what power you have to the ground. Make sure everything is done before diving into turbo options.

 

the stock NA fuel system is plenty for anything you can do with the stock intake manifold.

basically the stock ecu runs rich enough that you can increase power by a bunch, and STILL be leaner than stock

 

^ +1

also ... while the RB header is a better unit than what you have, you may want to look into headers that have better, more modern designs. just to warn you, they will probably be more expensive though. another thing to consider is it's not just the header, it's the exhaust system! you mentioned you currently run 2-inch pipe, you'll probably need at least 2.5" to see results.

 

Alright, so for now (til i can get the header and redo my whole exhaust....again lmao)

What kind of timing adjustments are usually good? (sorry for the broad question)
i do have an Rtek 2.0 so i can adjust through that, but should i adjust the CAS around?

So with the fuel i should pull some fuel outta the top end correct? cause from what i've been reading thats the main power loss is the uber rich factory tune


Oh ya, i'm ordering fulll Coilovers, and gonna redo all the Bushings under the car with either Poly, or Delrin <---- leaning more towards Delrin

 

Noticed people saying they "locked dizzy" (mostly at 20*) is this usually a good power gain? or is it just easier to tune if timing is locked?

 

Well you can't lock a distributor you don't have, so ...

Leave the CAS at the stock position, and tune with the Rtek.

 

Well with the Rtek is has a check mark for "lock Timing"

So i'm assuming that Locking the timing is just for setting base timing?

 

I would imagine so.

 

Ok Thank you

 

You lock the timing so you can stab the CAS in the right position most of the time.

Locking the timing is wasting alot of power, and every engine has its preferred range of timing depending on how efficient the engine is, what kind of porting ... and so on.

Truthfully you're just wasting time trying to tune with that exhaust system that you have especially if you're going to be changing it in the near future. Changing it to a larger diameter and a better header will change things quite dramatically actually on the tuning side. The whole point of tuning is to maximize the performance of the engine with every single component installed on the vehicle.

 

I Agree Completly, but for now it wouldn't hurt to practice tuning and get a feel for using my Rtek to do so.

And thank you for the Lock Timing Info