How much boost would be safe yet aggresive?

[Emc209i]

Once I get all of the kinks out of the Fiero I was thinking of forced induction (along with a host of other things). Say I didn't plan on reinforcing the bottom end, no ARP bolts, and stock pistons and rods. Would say 7-9 pounds of boost be a good idea, or would the motor get unhappy really quick? I know the professional answer to this question, but I see GP owners slapping Eatons on there N/A 3800's and kids all around town putting turbo's on non-built motors. How well do you guys think the DOHC would hold together?

[toms92gp]

well the stock rods are forged so you won't have and issue with them under 7-9 psi. I think 7 will be fine as long as the engine is in good shape and not wore out. Btw with you being in winston-salem all of about 90min from my house and about 20min from my brother and sisters place we may have to get together and hand out some time.

[timg]

5 -7 psi on a FMU
7-12 psi with real tuning

Tim

[z34phoenix]

also the 3800 boys arent just slapping the eaton on their cars. the GTPs come with the M90 Eaton. some people do swap an M90 on the NA 3800. but this takes some tuning as well.

[Emc209i]

The stock rods are FORGED?! What about the crank? The motor is in great shape; you can check that out here: http://www.fiero.nl/forum/Forum1/HTML/063216.html


I was talking about guys running the M90 on the L36 bottom end and not the L67 bottom end. I have tuning capabilities.

Ryan Gick in Indiana has said that hyperneumatic pistons are weaker than stock under compression (thin cylinder heads). I know the crank is not forged, and Ryan was saying he'd only run bost on billet four main caps with ATP bolts.

The thing is, I need something reliable, and tubo's ill never be as good a choice as say a blower, but I think its a waste of time trying to adapt a supercharger. So I think I will run a good turbo when I get new exhaust made.

Tom, I'm at UNCC right now. Winston Salem is my home town. I'd take you up on your offer though.

Any more constructive ideas or words of wisdom?

[series8217]

The stock rods are FORGED?! What about the crank? The motor is in great shape; you can check that out here: http://www.fiero.nl/forum/Forum1/HTML/063216.html


I was talking about guys running the M90 on the L36 bottom end and not the L67 bottom end. I have tuning capabilities.

Ryan Gick in Indiana has said that hyperneumatic pistons are weaker than stock under compression (thin cylinder heads). I know the crank is not forged, and Ryan was saying he'd only run bost on billet four main caps with ATP bolts.

The thing is, I need something reliable, and tubo's ill never be as good a choice as say a blower, but I think its a waste of time trying to adapt a supercharger. So I think I will run a good turbo when I get new exhaust made.

Tom, I'm at UNCC right now. Winston Salem is my home town. I'd take you up on your offer though.

Any more constructive ideas or words of wisdom?

Matt Hawkins put down just under 400 WHP with a rebuilt 3.4 DOHC. He has ARP rod bolts, aftermarket hypereutectic pistons, and stock rods.
Didn't Tim on this forum get similar numbers with a completely stock (internally) motor?

BTW, I don't know why people keep talking about forged rods like they're something special.... ALL motors made in the past 40 years (if not more) have forged rods except things like lawnmower engines (Briggs & Stratton uses cast aluminum rods in the small motors).

[toms92gp]

Matt Hawkins put down just under 400 WHP with a rebuilt 3.4 DOHC. He has ARP rod bolts, aftermarket hypereutectic pistons, and stock rods.
Didn't Tim on this forum get similar numbers with a completely stock (internally) motor?

BTW, I don't know why people keep talking about forged rods like they're something special.... ALL motors made in the past 40 years (if not more) have forged rods except things like lawnmower engines (Briggs & Stratton uses cast aluminum rods in the small motors).

So that would explain why the one in my dad's mower shatter in to little tiny chunks.

[RedZMonte]

the engine will hold up if you have some way to tune the Fuel/spark/timing. Your injectors will definatly max out. i am running 5-6psi and stock injectors and i am running lean. I am doing a 1996 harness and computer swap in my 1995 and will be running 42.5# injectors (zzperformance.com) and after tuning it with HP Tuners i will be fine. TimG has 42.5# injectors and the "split Second" FTC1 box for tuning. He made if i recall 325hp/350tq@10psi and stock internals.

ZZPerformance ICCU will do the fuel but not timing on the OBDI systems that use a MAF (1994+ LQ1 car). I have a Mini AFC 2.0 and having trouble getting it to work... Either im a retard or its F'd up..... Im thinking i don't know WTF im doing with it. Tim had a mini afc on his before turbo and gained like 15hp so i know they work with the MAF cars.

[timg]

Matt put down 50+ horsepower more than me with his setup.


Tim