250 WHP Supernatural 3.4 Build (Page 5/47)
turbo 3800 OCT 25, 06:48 PM
Details on heads? More up close pics of ports? How about parts used? Larger valves? Flow numbers? Who ported the heads?
Will OCT 25, 07:58 PM

quote
Originally posted by La fiera:

I don't know if I mentioned it yet but I'm working on a set of 3500 aluminium heads to complement that bottom end I just
mentioned and my goal for that set up is 300+ WHP.




If you want naturally aspirated power, start with a 3900. End of story. Biggest bore and best heads ever put on a 60 degree V6, roller cam, no replacement for displacement.


quote
Originally posted by Francis T:

I would suggest limiting your targeted peak power to around 5k - 5.5k RPM if you have an iron crankshaft, especially with a 3.4 - which is a stroked 2.8- too much reciprocating mass.

I got lucky - cost me $110- and brought one of the last -discontinued- Eagle STEEL crankshafts, else I would not have built my 2.8 for high RPM use.
BTW Venola makes good forged pistons that are priced good.



Almost all stock 60 degree V6 bottom ends will go to 7k just fine. The early 2.8's without the lead-in grooves to the crankshaft oil passages are the only exception.

[This message has been edited by Will (edited 10-25-2017).]

La fiera OCT 25, 10:20 PM
Hello will! I didn't mentioned it before but I want to keep the "stock " long block look. I'm working on a 3.7 liter using the stock Camaro block.
I know, I know, I can hear all the talk but you'll see it after is done. And I decided to stay with the iron heads because I want to keep the "stock"
looking long block. And my goal is still 300WHP. Hard to swallow but I love challenges.

I'll be selling the 3500 aluminum heads. They are being developed right now $1000 shipped Anybody?
Flow numbers will come soon.
La fiera OCT 25, 10:25 PM

quote
Originally posted by turbo 3800:

Details on heads? More up close pics of ports? How about parts used? Larger valves? Flow numbers? Who ported the heads?



That's the kind of information that can't be disclosed like I mentioned on m first post.
The only thing I can tell you is that is not about how much they flow, its about the length of time of "that" flow.
lou_dias OCT 26, 12:28 PM

quote
Originally posted by La fiera:
Hello will!


I was wondering how long it would take before some pundits would tell you you're doing it wrong. LMFAO!
Clearly you're doing it wrong if you're making mode hp than a stock 3900 with the world's greatest factory heads...

You'll have to tell me how you're going to coax 3.7L out of your other block though...
turbo 3800 OCT 26, 01:06 PM

quote
Originally posted by lou_dias:

I was wondering how long it would take before some pundits would tell you you're doing it wrong. LMFAO!
Clearly you're doing it wrong if you're making mode hp than a stock 3900 with the world's greatest factory heads...

.



Yea but la fiera still makes 25+ hp less than a near equally modified lx9. Lx9 wasn't fully rebuilt to race specs like la fiera. That's a fact.

Cam swap and 75 mm tb on a 3900 through an auto did 240 whp through an automatic. That's about 300 crank with 2 mods.

Claim you want to keep it stock looking but not with that intake manifold on it sticking out through the decklid.

You already made 240 whp so 10 more should be there.
Tony Kania OCT 26, 02:35 PM
Some men prefer blondes, other brunettes.

I love the cleanliness of this build. While not as interesting, I too have a very clean block on my engine stand. It is a Ford, but just as shiny.

Carry on. This is a nice thread to watch.
La fiera OCT 26, 02:56 PM

quote
Originally posted by turbo 3800:


Yea but la fiera still makes 25+ hp less than a near equally modified lx9. Lx9 wasn't fully rebuilt to race specs like la fiera. That's a fact.

Cam swap and 75 mm tb on a 3900 through an auto did 240 whp through an automatic. That's about 300 crank with 2 mods.

Claim you want to keep it stock looking but not with that intake manifold on it sticking out through the decklid.

You already made 240 whp so 10 more should be there.



Now that's an unfair comparison, the LX9 has 500cc' over in displacement, better intake and heads that flow way better than the 3.4 and the advantage of the roller cam.
So that engine you mentioned with 2 mods that made 240WHP, in reality it has 6 mods over the L32.
A bone stock LX9 is about 165WHP and a bone stock L32 is about 135-140WHP.
I don't know if you know but with the 2.8 I had previous to the 3.4, I was able to squeeze 173WHP @ 6000RPM.., more than a stock LX9.

The best part of having the stock appearing long block with an intake sticking out of the decklid is the look of peoples faces, specially at the track.
They spec to see a SBC, 4.9, LS4 or something else.
I respect and admire peoples engine swaps because they give their Fiero a unique personality and soul. The car becomes a living creature with a new name and attitude and they display it proudly! The car now becomes a REAL Fiero!!


But for all fairness sake, I'll just keep my iron heads and keep charging forward.
After reaching my 250WHP goal, my next goal is to get those extras 25WHP to pass that nearly modified LX9 you mentioned.

Stay tuned!
pmbrunelle OCT 26, 05:51 PM

quote
Originally posted by La fiera:


That's the kind of information that can't be disclosed like I mentioned on m first post.
The only thing I can tell you is that is not about how much they flow, its about the length of time of "that" flow.



Are you worried about someone on the board making their Fiero quicker than yours?

Why does the sauce need to be kept secret?
turbo 3800 OCT 26, 06:36 PM

quote
Originally posted by La fiera:


Now that's an unfair comparison, the LX9 has 500cc' over in displacement, better intake and heads that flow way better than the 3.4 and the advantage of the roller cam.
So that engine you mentioned with 2 mods that made 240WHP, in reality it has 6 mods over the L32.
A bone stock LX9 is about 165WHP and a bone stock L32 is about 135-140WHP.
I don't know if you know but with the 2.8 I had previous to the 3.4, I was able to squeeze 173WHP @ 6000RPM.., more than a stock LX9.

The best part of having the stock appearing long block with an intake sticking out of the decklid is the look of peoples faces, specially at the track.
They spec to see a SBC, 4.9, LS4 or something else.
I respect and admire peoples engine swaps because they give their Fiero a unique personality and soul. The car becomes a living creature with a new name and attitude and they display it proudly! The car now becomes a REAL Fiero!!


But for all fairness sake, I'll just keep my iron heads and keep charging forward.
After reaching my 250WHP goal, my next goal is to get those extras 25WHP to pass that nearly modified LX9 you mentioned.

Stay tuned!




The lx9 is a 3.5 liter. The lz9 is a 3.9. Yes the lz9 has more displacement but I wouldn't call it unfair. Formula1 engines are smaller than an lx9 and make more power n\a.

Swapped Lx9 is into fiero and Cavaliers have made 180-200 whp. Simple mod like freeing up intake with a pipe and filter and larger diameter exhaust when swapped is something that has to be done anyways when swapped. There are dyno sheets out there of this I am sure. No other mods done. No cam headers or anything else. That's 60-70 hp more than an l32

Lx9 with stock compression, ported heads, camshaft gasket matched factory intake and a 65 mm tb made 35 more hp than the fully built iron head 3.4 and still did it on factory computer. Most modded 3.4 only do 160-180 whp though. Yours is much stronger than average.

A 3900 iron block still has a factory longblock look to it if you put iron heads on it. Then you get advantage of stock looking block with increased displacement and roller cam.

You could use a 3400 iron block and use a roller cam too you know. You are using a big mechanical while the lz9 uses a puny hydraulic.

Congrats on using iron heads and making 240 whp. Its a good accomplishment. But it could be more if you ditched the iron heads. That's the point Will was making. Since you want to sell your aluminum heads you willing to share the specs on those that you claim to have modded? Flow numbers? Valve size? Number of angle valvejob?