Ive transplanted the heart of an Iroc in my Fiero. Heres the specs. Its a 350 .30 over balanced. It has the stock roller cam, edelbrock alum heads and sanderson cc90 headers. elec. waterpump.

Now here the question I WANT MORE POWER!!!!

Cam suggestions anyone? any other good performance mods?

What would you do?

Thanks

 

Awsome... but you need MORE POWER? IN A CAR THAT LIGHT?

Heh... well, here goes...
Im guessing that you dont wanna pull the engine for a new cam, so thats out of the question. You could do the following:
-SLP Runners
-Aftermarket, or Siamised stock base
-52mm Throttle body, or add an air foil
-Port Plennum
-Nitrous Kit of your choice

See, the bottle neck now is your intake. Your heads flow very well, but your intake doesent. Im sure with just the runners, siamised base, ported plennum, and a 52mm TB, you could gain upwards of 40-50 HP. And in a car that light, you would DEFINATLEY feel it. You could also convert to an Lt1 Intake if that is of interest to you. I would also burn a custom chip... theres a few extra HP to be had there as well.

Good luck! Howbout some more pics of that ride?

 

I think a newer verions of photoshop editor will get you more horsepower!

 

Looks fine to me chief. you've never seen a TPI motor in a fiero before? Why call BS on the guy? Here's here asking about camshafts, not looking to get flamed on his car. Try to pull your thumb out of your *** and stop wasting people's time and insulting them for no reason.

Anyway... ANY cam should be a huge improvement over stock. Since you've got decent heads, as long as you've got headers to evacuate the exhaust gasses, I'd say you could get away with as much as .500 lift, maybe even a little more if you upgrade the intake system. LSA around 112*, maybe 110* if you don't mind the idle & loss of vacuum. The LT4 Hotcam or the TPIS ZZ9 cam would be good choices.

The Holley Stealth Ram would be the way to go if it'll fit under the hood. It's cheap, flows a ton, and along with those heads and a good roller cam will make a whole bunch of power... well, at least enough that your transmission will start to hate you.

Oh yeah... I almost forgot: You're definately going to want to have a new PROM burned. The new cam will run ok with the stock programming, but there is PLENTY of horsepower to gain by reprogramming to optimize the motor around the new setup. If you don't already have bigger injectors, I'd also suggest an adjustable fuel pressure regulator so that you can bump the pressure a few pounds.

 

Yea, I dont see any around here either...

Anyway, a cam change is a good idea. The stock cam isnt really necessary with aftermarket heads like what you have, go with something that has more lift like Jim suggested.

Oh and to the poster above, Fieros arent light, they are actually fairly heavy... especially with a V8 instead of V6.

 

Rob's comment, maybe while uninformed, was made in a somewhat light-hearted manner. Your comment was uncalled for and maybe you should ease up on the caffeine.

 

Im kinda agreeing with the photoshop statement.


Look at the lack of detail EVERYWHERE inside of the engine bay, except for the engine which comes through crystal clear. Also if you look at the top of the plenum it kinda *smears* over half of the TB. There are a few other small details.

As far as the cam if you want to know what cam will go good with what car give us the real car/combo.

 

Yea, sure... photoshopped... I guess you guys have never seen a TPI in a Fiero? Looks just like that. Take a look at the highlights and shadows. Its obviously a flash picture, given the reflection off the runners and TPI, and the heat sheilding on the firewall, not to mention the reflection off the engine cover which matches the direction of the flash on the engine. Look at the highlight on the cover support, the rubber seal, etc. If someone photoshopped that engine into that car, they went to an AWFUL lot of work to do it. They even got the engine hookup and placement right

 

How are chevy V8's mated to fiero transmissions?

 

V8 Fiero's are not a new thing.
http://www.v8archie.com/v8fiero.htm
I like to see the engine this way:
http://www.fieroaddiction.com/SBCLa.html
I've been looking into Fiero re-bodies for a while now. DOHC 3.4 is the way to go.

voyagerspe: If you'd like a place to go to share info, (mostly kitcar stuff), try Ari's site http://www.kitcar.ca/cgi-bin/Forum/YaBB.cgi
Nice job on the conversion. Which trans are you using?

 

Maybe. I read it as a wise *** making an unfounded (and unsupported) comment like I see way too many of here.

And I think the real problem was that I hadn't had any caffeine yet.

 

Hmmm 11 posts into this thing and we having not heard from the mysterious rookie voyagerspe with 1 post.
Jim85IROC. I've been on this board for a very long time and have seen this type of troll work too many times. No my thumb is not up my *** and I'm sure I've seen just as many custom engine transplants as you. Probably the best was a BB 454 complete with blower stuffed in the trunk of a VW bug. So nothing really suprises me.
Until I see more photos from Voyagerspe at different angles, I'm not convinced.
If I'm wrong I'll apoligize. Till I see more photos

 

Dunno Rob, the first picture looks awful similar to the main pic at v8archie.

 

Well, there are quite a few Fieros running around with SBCs in them. It makes a nice combination. I have attached a photo of my CA smog tag, and a rather limited shot of my 350 Goodwrench TPI. The weight is moderate, I drove mine to a truck scale, and it came in at 2828# with about 4gal of gas. The weight distribution is just the opposite of a 3rd gen, at about 55% R, and 45% F.
Visit the v8Archie.com site posted by RCR for many more and better photos.

 

I have not figured out how to attach two photos to a message yet, so here is the CA smog tag image:

 

Actually I have seen a VW bug with a 455 and a Toronado transaxle... rather silly but its real.

As far as a TPI in a fiero, thats an old swap. check the kit car mags. cheers, Bob

 

NOT BS

 

pics

 

Ive got lots more pics but i think this proves its not photoshop.

thanks for the advice on performance mods, ill have to do get a better cam ( any spec suggestions) and ill look into the siamese runners.

1 more quick question is speed density better than mass air flow on a TPI?

thanks

 

Speed density is without a doubt better.

Depending on what you do with your intake is what cam you'll want. But with what you've got there It looks like some nice heads and stock tpi? You'll need siamesed runners at very least to feed those.

With any setup get as much lift as you can afford in parts, reasonable would be about .500

Duration something under 220 probably, maybe like a 214 220
and either a 112 or 114 LSA, again depending on intake.


114 will widen your power "band"
112 will make you a tiny bit more of a "peak"

 

Just a question, how well does the 125 tranny hold up to that
much power?

 

 

Reading through the site it said they haven't had any drivetrain failures yet....

 

Thanks for the cam recommendation. Right now it is a stock TPI setup So ill probably improve that part of the motor first. As far as the 125 tranny holding up thats part of the reason im on this board asking for performance advice. I have currently dropped the cradle (engine and tranny) to do a tranny swap to a getrag 5 speed. I havnt had much luck in keeping a 125 together for any lenght of time. The 125 that I just pulled was a special "racing" version that was built with a custom band, and clutches and it was geared to 3.73 . The 125 would probably hold up to street drivng but It doesnt like the weekly trips to the track Since the engine is out of the car I thought it would be a good time to do some mods. Thanks again for the help, Im sorry to take up bandwith on a non F-body but you guys seemed to be the logical resource to tap into for TPI perfomance mods. Im hopeing to finish the 5 speed convertion in the next couple of days (Drags on sat ) ill let you know what I ended up doing to the engine.

 

To be honest with ya, your car is more impressive that some of the cars weve been seeing latley here on the boards, and Id like to see more of it... I think it rocks! Whats it pull in the quarter anyway?

 

Voyagerspe, I apoligize for doubting your excellent swap!
Looks like one heck of a lot of fun!

 

My nrxt project after I am done with the IROC(are you really ever "done tho ) Will be an 88 Fiero GT with either a 3.4 TDC motor or a 3800 SC with an intercooler and all the works pushing about 380hp. oh yeah!

 

Voyager, you are welcome on here at any time. Did you do the swap yourself, please say yes. I post on fiero.nl sometimes but almost 80% of those guys have there swaps done by a shop.

 

Yup, did the swap myself w/help from a buddy of mine.
havent run the car in the 1/4 mile my local track only has an 1/8th mile track. With my 3.73 gears in the auto my best time was a 5.78 however it more consistanly ran in the 6.0 to 6.2 range. That is with a slipping 2nd gear and the car was only good for about 2 runs before the tranny got hot and slipped to much to run. I hope to slove that problem with the 5 speed conversion. Once I get all the bugs worked out ill take a roadtrip to cicero (1/4 mile). The best thing about the fiero is very little tire spin, Ive been told that you can see daylight under my front tires when I hook up well.

 

Hell yeah.

 

Has anybody answered your question?

The last thing you need is gobs of torque, so I would consider swapping in an LT1 intake to get some better breathing. A good set of heads are a must. Your probably restricted on what you can use for headers, but try to open the exaust up. For a cam, I would suggest the LT4 hot cam. Compliments the intake very well. A well programmed PROM is essential once it's all together.

 

LT1 intake, NO QUESTION, since the Holley SR won't fit under the trunk lid unless you cut it and mold in a "Scoop." I've been looking into this for awhile, since I always thought it would be cool to have a stretched fiero, with a diablo kit, and a 420CI small block that could smoke the actual car, for a lot less $$$. Did Archie complete his LS1 kit yet?

 

Think about this, a holley stealth ram, with a custom molded scoop that curls around by the passenger side window like I have seen on several Fieros. That would be some cool ram air!

 

5.78 in the 1/8 mile? Are you sure its not 1/16 mile or somthing, and you did this with a near stock tpi set up. Down out our local track the faster 10.5 tire cars run 5.20's in the 1/8 at over 130 mph. A 5.78 in the 1/8 mile should put you easily in the low 9's in the 1/4. Im gonna have to call on that unless your race weight is like 500lbs.

 

First off, his car weighs much less that 3k lbs, second off, his motor is directly over his rear wheels, hence not many taction problems. Keep in mind he has Edelbrock heads as well... theyre good for a few horsies.

 

I find it absolutely HOLARIOUS that so many people here are trying to call on anything they can. Pick up a kit car magazine subscription - and stop talking about what is and what's not becaue you are making yourselves look bad. His total weight is probably at around 2450-2650, maybe a touch more, and that's assuming he hasn't done and lightening. I'm not sure if his car is a Manual 4 spd, manual isuzu 5 spd, manual getrag 5 spd, but hopefully it is not an auto. Anyway you slice it, he is light, with most of the weight on the drive wheels, and has lots of torque. Think about it - it only takes about 250HP in a Civic Si to run 13's all day long, with noplace near the torque production of a TPI motor. They will weigh about the same, the Fiero has the advantage of RWD, *AND* an unimaginable amount of torque for it's size/weight.

5.78 does seem a little on the quick side to me, but if it was tken with a Gtech, the cars weight-to-torque ratio could be throwing things off. But it's not so far out of line as too sit back & claim

 

He was running an auto, which got fried, and is switching to 5speed man. And yeah, the people callin bull**** on everything on this post are getting a bit annoying.

 

Nice work voyagerspe, Please by all means continue to post your progress and questoins.

This thread has been tapped for all it was worth though.