12 sec n/a DOHC Fiero, is it possible?

[SappySE107]

maybe if he got some free prototype parts and sold them for a small fortune he would have some money. Oh wait, that was you.

I can't see any reason for this post. He hasn't done anything wrong on this site. Go back to your lame ass pennocks sucks troll site if this is the best you can do.

[donk_316]

The point of this post is that this homo has been on 3 different boards spouting the same shit but has "bought" a different motor every week. Started with the 38sc, then the SBC, now a dohc? oh but wait.....wasnt the duke the best engine ever? im sure i heard that from him too.

[SappySE107]

I don't care. I pmed you asking who it was thinking he may have been here before and then made a new name. That is not the case. The case is he hasn't made any stupid posts here or talked shit or been annoying like aaron. He mentioned that he hasn't decided and was asking about the 3.4 DOHC, hence this whole thread. However I now have bullshit that has shit to do with the 3.4 DOHC in this thread and none of it has to do with the original poster.

[Guest]

Wow you are cool.

And hmm maybe I should have just given the parts to you sappster?

Its not my fault you didnt' jump on such a deal is it? Don't hate; appreciate.

And before you deleted all of my posts I made some valid points.

As long as I save others on here the time of responding to this thread then my job here has been done.

Once again:

http://www.fiero.nl/forum/Forum4/HTML/022064.html

in 2 months he has gone from 3.4 pushrod, to 3800 series 1 S/C, to SBC, to ls1 and now to the DOHC.

AS you can see this kid dreams and thats it.

Dont' waste your time responding to this kids questions people.

[SappySE107]

I didnt delete all your posts. I didn't have any interest in that block at all, or the intakes. Still don't. I just find it funny that you think your role on this site is to save us from discussing things. Once again, I don't care if he hasn't made up his mind on what motor he wants to play with. I don't care how rich he or his parents are.

You are about to be the official banned for a week troll if you post in this thread one more time. Take it to PM if you have a problem with me or the original poster.

[Mumaro13]

..................

[crzyone]

Dreaming of different engine swaps is one thing, but comming in here and asking what it would take to get a 3.4 into the 12s is alittle much. As far as I know, nobody has done it. Nobody (as far as I know) has really put their money into a NA 3.4. Its easier to slap a turbo or nitrous on it than spend big bucks for iffy gains.

Do it and post your results here. I'll check back in a few years.

[Froggx]

I looked for about 4 months at all the swaps available before I decided which one I wanted to go with, probably would have kept looking for a while longer if my 2.8 hadn't blown up.

[crzyone]

Well, I disagree with those "keys" but I guess we all have our opinions and facts to come up with a list. Decked heads is on my list of "who cares". Heads have plenty of issues stock, short runner intake sucks ass for sub 5000 RPM, cam regrinds aren't proven yet and retiming is free. Headers I do agree with, stock manifolds are shitty for performance.

Missed this post.

Compression= power. If I could run 11-1 with 91 octane, that would be perfect.

Cams- not necessarily more lift, but a whole lot more duration. This is a huge power maker. Stock cams are a huge bottleneck. You can still play with timing on cams with big duration.

Short runner intake- For those of us with light weight manual cars, low end torque isn't a big deal. I want the power to be there when I'm rowing through the gears, not when I'm commuting. Low end torque is a non issue. Need power, drop a gear.

Headers- Equal length with a nice long collector would be ideal. Sized big for minimal back pressure.

And when you have reached the limits of the heads, a good port and polish. There are many other restrictions to get rid of before this is needed.

These are keys to a high hp engine, not exactly good for a heavy fwd car. This will still be streetable in a lightweight manual car. Modding a 3.4tdc isn't hard. Its expensive. When its all done, a good tuning on a dyno will be needed.

[SappySE107]

Decking the heads isn't going to get you anything special for compression. If you want to be serious about a power gain from compression, get some pistons. More duration would be nice, but it will have a bad effect on low end. Sure, some of you guys like the idea of all out high RPM, but I have better things to do than run it up to 7k everywhere. I have no problems with my current setup though cruising around at 1500 and would rather not kill my gas milage as well.

[DreX]

I want to make things straight here.

1. Bashing and insulting other ppl is not right and adecuate. Its better to instruct and be open minded.

2. pennocks is one of the best forums in the net if is not the best.

Mumaro13 : If you dont have $$$ stay away from DOHC. Sorry to burst your bubble. IF you can get a cheap used 1 and aim to run 12 you better rebuild it and that will involve some real money after mod the parts for gain power. So, after all you will spend almost the same amount than a ls1 swap. They have plenty of torque, actually I cant floor it in 1st gear cause it will fish tail. BTW, yesterday I was in the race shop where I work and did some burnouts in 1st gear and there is no where is earth that a street tire will hold it. Im running 225/17/45 nitto and it burns it just like butter. Never the less my engine is moded, actually I think is the most moded one. I didnt touch the internals since my engine is new. But all external parts are moded. Im sure that spend close or more than $3k in mods only. Most of the parts needs to be custom, research and development is constant but stays in the enthusiats. So probably you cant get many performance parts of the shelf.

The swap isnt all that easy ether. a 4 speed isnt a good choice for a tranny tho. Dont get me wrong, it will work but weak the spot of the 4 speed is the 3 to 4 shift. Its to long to recover the power band. A 5 speed Isuzu or Getrag will work better.

The 3.4 DOHC engine is damn impresive engine. Its not an engine for a kid to play with. A stupid mistake can cost you some heavy bucks. Parts are not all that available and are expensive. You have a Fiero, you know what I mean.

If you want a cheap and easy swap go with 3.4 pushrod.
If you want torque go with a v8
If you want hi-revs go with 3.4 DOHC.

Pick your taste.

BTW, try to drive fieros with the swaps done so you can have a better comparisson.


Dre

[lodown1]

3.4 DOHC 12 sec fiero

This is an interesting thread, as far as i know the 3.4 with modified intake and timing will dyno around 240 hp and about 185 lb-ft of torque at the rear wheels. obviously there is not alot of power below 5k rpm's. But here is an idea as far as getting a higher compression ratio, the northstar v8 uses pistons that are 93mm instead of 92mm for the 3.4 also the comp. ratio is 10.3:1
Sure it would cost money to do a quality rebuild, but hey a new Z06 motor will run you 6k-8k. On a side note the Ferrari 360 Modena has a 3.6 DOHC V8 395 hp and 275 lb-ft torque, it also weighs 3065 lbs. power to weight ratio =7.75 lbs/hp. Pontiac fiero weight= 2600 lbs. If you use the figures quoted above for a 3.4 your looking at about 280 hp and 220 lb-ft torque. power to weight =8.9lbs/hp. Not to bad.

[napatiger]

RE: 3.4 DOHC 12 sec fiero

Quality rebuild cost me 900 for machine work and rebuild parts...
plus about a grand nickle and dime stuff, mostly tools.
pretty cheap if you ask me. The engine is Nitrous ready, oh wait this is a N/A thread.

[Anonymous]

Never the less my engine is moded, actually I think is the most moded one. I didnt touch the internals since my engine is new. But all external parts are moded.

You don't have the most modded one. The highest modified N/A one so far I think belongs to Aaron, and his has some parts on the inside iirc. But there are a few Fiero guys with motors that are close, if not further done than his.

[dohcfiend]

well i have read enough about sbc/N* fiero swaps to know that if you start pushing the engine that tranny will fail. i remember reading a post where a lt-1/4spd guy went through 2 or 3 of them. a 4.9????? unless you spend the extra cash to go to asg 5.0 i don't see any benefit to that. an ecotec???? if you are on a budget that isn't the way to go. a quad4? maybe i don't have any real info on this motor. l67 i have one f/s for $350 but it needs the blower assy but i doubt it is still at the yard now. if you know where to look you might score a l67. the lq1 very good balance for a fiero hardly any weight difference between that and a 2.8. but anything other than nickel and dime mods will cost you.

personally i don't see the bad torque rap it is getting. it has almost(+/- 5) as much torque as horsepower. of course it isn't exactly easy to increase it though. i don't see anything wrong with "dreaming" it shows creativity but just dreaming isn't enough though do a little research and come with you own pro's and con of each motor post them and ask other peeps with experience about their input.

i will do a little 3.4 tdc for you though. it has the same engine mount as the stock motor and if you bolt it to a fiero tranny of course the fiero tranny will have the same mount. only pain in the ass i have read about other than shoehorning it in is fabricating a new dogbone mount. some peeps have dropped the cradle to put it in and some have put it in through the top it is up to you on that.


if cash is your problem, sell some of those surplus parts you have. and if i was crazy short on cash i would pull the 2.8 and go with a 3.4 pushrod. it will fit alot easier and cheaper to mod. all of this is my opinion so take it how you want.

speaking of research, nice work lodown1. so all one has to do is overbore 1mm and they will fit. you should have posted this tidbit earlier. only thing i am curious about is would they work in a 3.4 tdc? as far as the valves hitting them. any1 know what numbers i would have to crunch to figure this out?