V6/60 surprise

[Atilla the Fun]

I didn't document the build here, though I probably should have.
I built a 3.4 for my '86 Camaro, and the results are surprising. This isn't the first time I've built a 3.4 for an '86 F-car, but the first one got stolen before I could drive it. It was bored 0.040" over, with new pistons and a Crane 260 cam, this one got neither. This one got polished pistons, and porting / polishing to the heads and all the manifolding, both intake and exhaust. 5 pieces. And milled heads.
I've never had a 305 run so well. There was that 0.060"-overbored 305, but that made it a 315-cube. I'm still on stock converter and gearing, but wider 235/60R15 tires. And I can have traction problems at will, so long as I'm in first.
I have a spare pair of these heads if anyone wants to sample my porting, I just want $100 for the pair, plus shipping.
I think I'm running out of injector by 4500, but that's not too bad of a problem to have. If I keep the car, I'll try replacing the 3.4 injectors ( 17 PPH ) with a set of 19 PPH.
Also, if I keep the car, it's getting a Comp HE252H10 cam and Pacesetter headers with matching Y-pipe.
I already have a Flowmaster muffler under there.

[Shaun41178(2)]

Why don't you post some pics of your porting.

Also why did you start talking about a 305? I thought this was a 60 degree thread? I am confused here. Is the engine still together and running?

[The Dark Side of Will]

Build a 3500... work some magic on the aluminum heads and make some real power

[befarrer]

Modded the 3.4L V6 into a 5.0L V8??

[Emc209i]

I think what he was trying to say is that his new 3.4" (L32) runs better than his old 305, which was punched out to 315. I have a hard time believing that, as both engines are crap.

[Atilla the Fun]

I cannot understand how I could have confused you guys.
My V6 turned out so well that it surprised me. It turned out better than any 305 I've ever driven, including Tuned Port Injected 305.
It's working better than any 4.3 Vortec I've ever tried, too.
The minimum cheap engine I've ever driven that performed better than this V6: a 315 I built.
To make that 315, here's what I did: I started with an '84 LG4 305, bored it 0.060" over, installed flat-top pistons, set the quench to 0.040", custom-ordered a cam from Comp, then topped that with '76 LG3 305 heads that I big-valved and ported. I dropped that into an '85 Camaro with a 2400-stall B&M converter, a 700R-4 I rebuilt myself, a 3.42:1 axle, and Hedman headers. So it's no wonder that that performed better.
This 3.4, I am still daily-driving it. It's averaging 25 MPG, and that's NOT just cruising the highway at a steady 55 MPH.
I understand that the 3.5 heads flow better than un-ported 3.4 heads, but for my longitudinal application, that swap is way more involved than for your transverse application. But for the stealth look, and surprisingly acceptable torque, this is better than I could have thought.
If I keep this Camaro, then this 3.4 will get a Comp HE252H10 cam and Pacesetter cat-forward and 19-PPH injectors. That should prove dyno-worthy.
That 315 ran high 13s, by the way. Not crap. Your precious 3800-II ( in the '96-'02 F-bodies ) won't run that quick, even with cam and porting, unless you add boost, or cheat with nitrous. Stock L98 350s won't even run in the high 13s.

[The Dark Side of Will]

If I keep this Camaro, then this 3.4 will get a Comp HE252H10 cam and Pacesetter cat-forward and 19-PPH injectors. That should prove dyno-worthy.

If you change injectors and don't get the chip changed to compensate, then it won't be dyno worthy and you can kiss that 25 mpg good bye...
I suspect you know this, but I'm just covering bases.

[Shaun41178(2)]

If this car runs so good now, and you are more than impressed with how it performs as is, why is it not dyno worthy now?

[Atilla the Fun]

I sold the Camaro 3 hours ago.

[Emc209i]

I get it now.

[CincinnatiFiero]

Your precious 3800-II ( in the '96-'02 F-bodies ) won't run that quick, even with cam and porting, unless you add boost, or cheat with nitrous. Stock L98 350s won't even run in the high 13s.

No one on here has a 3800n/a Fbody.

[The Dark Side of Will]

My precioussssss....

[Shaun41178(2)]

I always sell cars of mine, especially after bragging about how well it runs, how great of mpg it gets, and especially after someone starts to wonder when I will get it dynoed.

Is this the surprise we should have expected from this thread title?

[Atilla the Fun]

I still have the spare pair of heads if anyone is interested.

[The Dark Side of Will]

I'd be interested in seeing what a 3900 from a G6 could do in a 3rd Gen F-body. It has the same power as a 350 TPI, but is at least 100 lbs lighter with Cg further back in the chassis.

[Atilla the Fun]

It has 240 HP, vs the L98 at 245 HP. But the average power is what matters, and the 3900 doesn't have it. Just look at the torque: 240 ft-lbs versus 345 ft-lbs.
And the 3900 swap would be more difficult and more costly than an LSx swap. For what? It's not going to return more than 32 MPG, because that's just how much drag the third gens have. The only way to top 32 MPG in a third gen is a diesel. And that brings us back to the Jag that Jeremy drove to Blackpool.

[Emc209i]

It has 240 HP, vs the L98 at 245 HP. But the average power is what matters, and the 3900 doesn't have it. Just look at the torque: 240 ft-lbs versus 345 ft-lbs.
And the 3900 swap would be more difficult and more costly than an LSx swap. For what? It's not going to return more than 32 MPG, because that's just how much drag the third gens have. The only way to top 32 MPG in a third gen is a diesel. And that brings us back to the Jag that Jeremy drove to Blackpool.

I know you don't give a shit what I have to say, and want me to walk through a mine field, but this is the most brilliant post you've ever made.

Having done the research I have recently, I feel like I'm in the "70's" of the 21st century when it comes to engine architecture and efficiency. I can't wait to move forward. Good call selling the car.

I always sell cars of mine, especially after bragging about how well it runs, how great of mpg it gets, and especially after someone starts to wonder when I will get it dynoed.

Is this the surprise we should have expected from this thread title?

I lulled.

[Shaun41178(2)]

It has 240 HP, vs the L98 at 245 HP. But the average power is what matters, and the 3900 doesn't have it. Just look at the torque: 240 ft-lbs versus 345 ft-lbs.

You mention average power as being what matters, but then you go and post peak numbers

Either way 3900 prob wouldn't be a good swap over a l98 unless you spent some money on the v6. Then again, one would probably have to dump money into a tpi 350 being as old as they are now(high mileage)