Jump to content
Forums Gone... but not forgotten!
Pontiac of the Month

FlyGTO's 1965 GTO

2023 January
of the Month

  • Welcome!

    Welcome to Forever Pontiac, where we keep the memory of Pontiac alive with great discussion, maintenance tips, restoration/modification progression "blogs" and help from professional & DIY mechanics. Also, wonderful competitions that occur regularly. Please register for an absolutely free account to join in!

Time for some GO mods!


Recommended Posts

So I am looking for some information on engine internals. For my engine, there are many things I could get, however I am trying to stay SMOG legal.

Here is what I have found:

78# Valve Springs w/ retainers

ZZP Cam - 210/206 @ 1mm and 10.78mm/10.69mm lift, 109 LSA

Cobalt-Addiction Underdrive Pulley and Shortened Belt

WAMS Tune

JBP Vortex T304 Stainless 4-1 Header

JBP ECOTEC Cylinder Head Kit [stage 1] [LSJ/LE5] (EVENTUALLY)

Any more ideas for LE5?

Link to comment
Share on other sites

  • Replies 29
  • Created
  • Last Reply

Top Posters In This Topic

With a good tune it shouldnt be all that hard honestly. If you do all of that get your head decked probably about .040 over to bump up compression very slightly. Port and polish your heads(You can do with a dremel), port match your intake manifold to your head. Help the head flow better and it should help quite a bit. Should atleast be able to run with lx9s.

Link to comment
Share on other sites

Questions

-Will an ECM tune fix the lean issues with CAI?

-If not, will a dyno tune fix it?

-Will I pass smog with the cam?

-What size ID and OD are the headers on an LE5 Cobalt compared to an LE5 G6?

Link to comment
Share on other sites

IIRC, the LE5 is the same in all the chassis' it was used in.

A tune can easily fix the code thrown for the CAI.

A cam shouldn't cause codes, especially when the PCM is tuned for that cam.

Link to comment
Share on other sites

ok, so would the regular tune sent from WAMS cover a CAI or should I just go to a dyno and let them do it? would a dyno tune still give me the heightened rev and speed limiters?

Link to comment
Share on other sites

agreed on the intake mani. nothing compliments a cam more than intake mani being bigger

Yeah, an LSJ Intake Manifold and Throttle Body swap is already in the plans.

Turbooo

No, I am going to stay N/A and see how much power I can get out of the LE5. My parents wouuld not be too fond of a turbo turning up on the doorstep..

Link to comment
Share on other sites

I think with flow mods, P & P, tune, decking, maybe a thinner head gasket to help comp, and other said mods, you may see 200-210. Just an estimate, I could be off. Not to many have toyed with this motor that I know of so it could be more or less. I say go for it bc if you can get it over 200 ponies then you should be able to hang with lx9 gt's, lz4 v6's. Some weight reduction may help too.

And dare I say 75 shot?

Link to comment
Share on other sites

there is a stock balt ss 2.4 with N/A just upgraded internals that manages 275hp to the crank, not the wheels. 250fwhp i believe.

Link to comment
Share on other sites

Shit, with that you could eat up modded GTP and GXP's

Actually I have been thinking about this sort of thing for some time now too. How much could I sqeeze from this 6 if I pulled the motor and tinkered with it. little porting here, deck it down, custom header blah blah blah.

I think the G6 has the looks of a nice quick car, and a chassis that could be great given a little power and some minor suspension modds. And I have learned from the saturn forums. They started with what we have, little to nothing and did all the work. Now they have a decent backing and several tc/sc cars.

Link to comment
Share on other sites

yeah. I am going to find a way to overcome the CAI problems even if it kills me and costs a shit load. $400 dyno tune SHOULD fix it.

Link to comment
Share on other sites

Its a computer that takes over control of your fuel and spark. One of the most common is megasquirt. It cost like $400, you have to put it together usually, and you have to splice it in to your wireing harness, and normally add a wideband O2. but then you can tune the fuel and spark maps yourself and get it very dialed in. It is what all the saturn tuners use.

Link to comment
Share on other sites

the owners of 2.4L SS's call their cars Cobalt Sport rather than SS due to the fact that they are not Boosted and dont like the confusion.

I have found a cheap way around the CAI issues!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share




Tired of these Ads? Purchase Enhanced Membership today to remove them!
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.