Those are my options you do not have like them. LOL. No I am a technican there.

Now has anybody boosted the 3500 engine before. Does it have the same or different inteals as the 3400.

There's probably someone on 60degreeV6.com with a boosted 3500.

Some 3500s have forged cranks instead of cast and they all have oil squirters for cylinders 5 and 6. Pistons aren't the same as well and aftermarket forged pistons aren't readily available for the 3500 unfortunately. Valvetrain components between the 3500 and 3400 can be shared except you can't use the older 8mm rockers from the 3400 IIRC.

this thread is way outta hand lol

Oh that's to bad that forged pistons are hard to find because with a stock forged crank and forged rods and pistons the 3500 could have some real potential. But how much boost can it handle stock I think the Max on the 3400 is like 10-15 psi.

i believe milzy offers forged pistons for the 3500....

if you use 3500 heads you have to use 3500 LIM i believe. but have a choice of 3400/3500 UIM.

Are u going to use the 3500 engine and build that when go to boost your car or will you just build the engine you have.

oh i think if you use 3400 upper, you need to use 3400 lower and maybe 3400 heads. but could still run the 3500 block. i honestly forget. milzy told me the options a few months ago but alot has happened since then. milzy or someone here can confirm that.



its a toss up, either a 3500 race block, 3500 stage 2 or 3 heads (turbo), (depends how streetable i want) stage 2 or 3 turbo cam. turbo size is still being thought about.

or same as above, but 3400 race block, heads, etc.

still alot of thought to be put in it. might just go 3500 for the little more power i could get, only thing i dont like on the 3500 is the UIM. so i might keep 3400 UIM, but still being planned. still got alot of time till i need a build plan. but ill come up with one soon enough.

You can use the 3400 upper with the 3500 Lower/heads no problem. It is the easiest route for a 3400 to 3500 swap, but I'd grind off the "3400 SFI" and powder coat the UIM. The 3500 heads that cant be used with the 3400 lower.

thanks for the clarification :)

3900 be individual

if he did he would be the first.

you should do a 3.5L DOHC V6

The Shortstar?

Both 3.5L DOHC and 3900 have little to no aftermarket support. They both have a decent amount of power for stock though. I'm just curious about what it would take tuning wise for the 3900's VVT to function properly. Electronically the TCM/ECM/PCM would have to be swapped to make it all work I'd assume. It maybe be possible for Milzy or WOT-Tech engineer a custom harness to make the swap plug-and-play. I'm assuming thats what Milzy needs a test car for. I just wish there was more support for the 3900. That would be a bad ass swap.

In Ontario you'd be able to classify your car as a hotrod if you have a custom engine swap.

I called milzy a while back to ask him about it and either the car basically has to be completely rewired to believe it is a g6 and function like a g6 or you have to tear apart the motor and remove vvt

The problem with the 3900 is trying to make two completely different generations of electronics work together. The Alero is Class 2 (J1850 VPW) based and the 3900s PCM is GM LAN (CAN) based. You may end up with different modules not wanting to communicate.

there is parts for the 3500. (MMS)

I totally missed that, you're right. I guess in that scenario you'd have to gut a G6's whole wiring and swap it into an Alero and there's basically no chance of retaining the stock gauge cluster because of how data communications would be handled for the 3900. Very complicated...

I told this way before in this thread!!!

If the guys want to run a 3900 he need to get a 3400 for the harness, heads/intakes/cam/t-chain components
basically you'll have a 3900''shortblock'' the rest will be 3400 or 3500
no way you can have a functionning cluster with just the 3900 harness....

well there is another way and that would be to run both harness and pcm in parallel.... (I didn't do this on my car it's kinda a hackjob, but it can work)

yes short star! :D