3.4/3400 project Tech Info (with Pics)

[nightrider2]

OK I've taken the time to get together some pictures and info on the 3400 top end. Before I started this project on my car. I spent nearly eight months researching the various cams, clutches, and other assorted goodies for the 3.4 RWD block. Shown nearly bare here. The 3.4 RWD block was the biggest of the 60* V6s but was only 30hp stronger than the 2.8. thats because the iron heads from the Gen1 2.8 managed to make they're way to the 93-95 F-body 3.4. These heads are shown here, and here. The second issue was with the poor intake manifold design. the Runners in the lower intake were too short to account for any kind of intake acceleration. Runners shown here. Now in my time researching ways to boost the out-put of the 3.4 with help from a member here I found a Very detailed thread on a top end project that was not done by anyone but one guy. This out lined the benefits of the newer aluminum 3400 heads that were not only a direct bolt on but increased the power greatly. The 3400 heads had much larger valves a much smaller combustion chamber and much larger intake/exhaust runners. the heads are shown here, and here. You'll notice in the second picture the heads come factory with beehive valve springs which allows for a greater rev-potential, and 1.6:1 rockers. Now to take care of the intake, the 3400 intake manifold has 9in runners that are of a much larger diameter allowing for far better flow and aims the fuel injectors directly at the heads. Shown here, and here. Once all together gains of near 40hp were achieved putting the car at 170RWHP being 200hp at the flywheel. But that was with a stock tune and cam. I've come across a fairly large cam and am waiting on a computer system to get the absolute most out of this block. I'll have more info to post later. Thanks

[Disruptore4]

Re: 3.4/3400 project Tech Info (with Pics)

That's pretty cool! I didn't check all the pics, but congrats on getting that kind of power out of a 3.4. Keep it up, and keep us updated as well.

[nightrider2]

Re: 3.4/3400 project Tech Info (with Pics)

black34v6 is the ones whos power ratings I'm quoting. I've gone with light weight aluminum pistons over the stock forged steel, and I have a much bigger cam and 24lb/hr injectors. Also if the S.O.B. I ordered my megasquirt from would ever ship it (NEVER EVER EVER buy from glensgarage.com) after 4 months of waiting. I'm hoping to have in the mid 200s and over 300ft/lbs of torque. The particular cam I have is speced for 4wd of roading and towing, In a 2.8 S10. so hopefully with the swap and this cam I'll have impressive #s to post

[97rs4life]

Re: 3.4/3400 project Tech Info (with Pics)

are you going to P&P the heads at all to work with that cam?

[Firebird45331]

Re: 3.4/3400 project Tech Info (with Pics)

did you have to use different pistons?

[97rs4life]

Re: 3.4/3400 project Tech Info (with Pics)

did you have to use different pistons?

for the 3400 swap yes you have to use different pistons than the stock 3.4 ones. compression ratio is insane if you don't

[Firebird45331]

Re: 3.4/3400 project Tech Info (with Pics)

so if you used the 3100 aluminum heads and intake you didn't?

[vanbibber]

Re: 3.4/3400 project Tech Info (with Pics)

same thing, compression would be thru the roof.

[TheGr8Schlotzky]

Re: 3.4/3400 project Tech Info (with Pics)

so if you can get 200 crank hp out of a 3.4 with factory parts, why is the 3800 stuck at 200hp with nothing that seems to drastically reduce power?

[97rs4life]

Re: 3.4/3400 project Tech Info (with Pics)

so if you can get 200 crank hp out of a 3.4 with factory parts, why is the 3800 stuck at 200hp with nothing that seems to drastically reduce power?

please leave this thread to 3.4/3400 info, lets not mix in the 3.8 things as then the threads go to the pooper

[nightrider2]

Re: 3.4/3400 project Tech Info (with Pics)

please leave this thread to 3.4/3400 info, lets not mix in the 3.8 things as then the threads go to the pooper

no thats ok I'll appease him for now.....the 3400 and 3800 valve are identical...enough on that. the heads will be P&P the intakes will be done to match. to be exact with 3.4 pistons the compression ratio would be 13.98:1 so thats out...I did find a set of forged aluminum pistons for it and let me tell ya...they're feather weights

[Firebird45331]

Re: 3.4/3400 project Tech Info (with Pics)

no thats ok I'll appease him for now.....the 3400 and 3800 valve are identical...enough on that. the heads will be P&P the intakes will be done to match. to be exact with 3.4 pistons the compression ratio would be 13.98:1 so thats out...I did find a set of forged aluminum pistons for it and let me tell ya...they're feather weights

yeah I'd say that's kinda high. I have 10.47:1 in my 86 350 and I'm pushing the limits with premium gas. What's the highest compression you can run on pump gas with aluminum heads?

[nightrider2]

Re: 3.4/3400 project Tech Info (with Pics)

i'd guess around 11:1 13.98:1 is even out of range for race gas

[Firebird45331]

Re: 3.4/3400 project Tech Info (with Pics)

so did you just use stock 3400 pistons then?

[nightrider2]

Re: 3.4/3400 project Tech Info (with Pics)

you can but I found aluminum hypereutenic of whatever 3400 pistons...there so light its rediculous