i forgot to ask you in the email, what are the P/N's for the ARP bolts. i called them and pretty much other than the rod bolts, i was gonna have to measure and call back and they would hook me up with the right head studs, main studs, etc. thanks.
------------------ Eric '87 GT 5-speed Gold/Tan 3.4 TDC + other goodies coming summer of '03
Keep in mind FSAE cars are choked by the restrictor. This is why you'll see so many teams with elaborate "header style" intakes, in order to limit the number of velocity heads. On an unrestricted engine, this is not as much of a concern. Box or log style intake manifolds are pretty common. They work fine unless you're doing things like single port nitrous or 5th (7th on a V6) fuel injectors that might not give an even distribution unless you're careful.
Very nice,have thought about how that setup could be on my DOHC,which by the way,was purchased over off of the Dixie highway from a GM only yard,when I was living in Dearborn. With the pressurized intake,and the size of those ports,I have a hard time imagining any flow-related drawbacks with that intake.
IP: Logged
08:51 PM
30+mpg Member
Posts: 4056 From: Russellville, AR Registered: Feb 2002
Thanks for the praise guys. Newfie, the intake is not quite just a box. The bottom of the "box" tapers down to the base manifold. I know this isn't the best for pure flow, but when pressurized, laminar flow goes out the window. Whatever I may lose due to the design can easily be overcome with a little more boost! T-minus 10 days until it's first dragstrip encounter.
Matt
IP: Logged
10:23 PM
artherd Member
Posts: 4159 From: Petaluma, CA. USA Registered: Apr 2001
Intake is basically an airbox, you make that a certin size, and you make the RUNNERS a certin width and cone shape and legenth. That's the real resonant element.
Is that a STOCK FIERO throttle body though? Gotta ditch that! (a 94 Northstar V8 Throttle Body is huge, and has similar sensors I belive.)
------------------ Ben Cannon 88 Formula, T-top, Metalic Red. (2:13.138 at Sears Point) "Every Man Dies, not every man really Lives" 88 Formula, Northstar, Silver, In-Progreess. -Mel Gibson, "Braveheart"
IP: Logged
10:29 PM
Dennis LaGrua Member
Posts: 15483 From: Hillsborough, NJ U.S.A. Registered: May 2000
artherd - I designed the intake box volume based on forced induction and the engine displacement. This is black magic and needs to be tested, but some engineering did go into the decisions. Yes I am using the stock Fiero throttle. With a N/A motor, throttle size is much more important than with a boosted engine. The stock throttle will easily support 400HP when air is being forced through it. Look at a turbo outlet. It is only 2" OD in diameter and can feed 400HP.
When is that Northstar going to run?!?
Matt
IP: Logged
10:42 PM
Oct 8th, 2002
fieroX Member
Posts: 5234 From: wichita, Ks Registered: Oct 2001
Matt, any news on the 3 to 1 stainless collectors? I really need a pair now, as I blew apart a header at the track, and have decided to just start on my turbo project now. I need 1.75" primarys (x3) X 2.5" collectors. Thanks man.
IP: Logged
04:21 AM
Matt Hawkins Member
Posts: 586 From: Waterford, MI Registered: Oct 2000
Originally posted by Matt Hawkins: artherd - I designed the intake box volume based on forced induction and the engine displacement. This is black magic and needs to be tested, but some engineering did go into the decisions. Yes I am using the stock Fiero throttle. With a N/A motor, throttle size is much more important than with a boosted engine. The stock throttle will easily support 400HP when air is being forced through it. Look at a turbo outlet. It is only 2" OD in diameter and can feed 400HP.
Share the math for all of this?
IP: Logged
11:08 AM
Nov 3rd, 2002
qwikgta Member
Posts: 4669 From: Virginia Beach, VA Registered: Jan 2001
Matt, Great job, i just purchased a 96 DOHC with about 29K miles, im going to put it into my 88 coupe. Do you have any websites or posts that i may find helpfull. Also, any odd things i need to know. I have done a search on the Tech and General forums, and have picked up a few things here and there, but i still have a long way to go. Thanks and i hope you dont mind the many ??? i will have in the future.
Rob
------------------ "DRIVE IT LIKE YOU STOLE IT"
IP: Logged
10:40 PM
Nov 4th, 2002
Fierobsessed Member
Posts: 4782 From: Las Vegas, NV Registered: Dec 2001
www.DOHCFiero.com Brand new website, in need of content, and rapidly growing. I think over the next month you will see much more coming in. We are encouraging everyone who knows first hand experience with the DOHC 3.4 to come forward, and share their stories and hard information on mounting, wiring, plumbing, performance, reliability and different transmissions and the like. As well as pictures and maybe even some videos and sound files... you get the idea. We are all in the same boat.
------------------
IP: Logged
02:52 PM
IROC Member
Posts: 1038 From: Salem, Mass USA Registered: Sep 2002
The Haltech was $1145 plus tax from Kinsler Fuel Injection in Troy, MI. I have seen new setups go on eBay for around $1000. The price includes the ECU, flying lead harness and sensors (minus MAP). The connector kit is an additional 75 dollars. The nice part about the Haltech is it can be used with the factory crank sensor and coil pack. I wanted all the reliability I could get. I am compiling all of my swap info for the DOHC website. It will include wiring diagrams and pictures of the install. Hopefully within the next week, I can have it all put together.
I just happened upon this site by accident and the first thing i see is this turbo Fiero. Only a guy from the Motor City could come up with something this good
Anyhow, sweet ride. I also wanted to let you guys know that a friend of mine owns Performance Fabricating & Engineeering in Chesterfield and they do custom headers for anything. They also do exhaust and rollcages as well as any other kind of fabrication work. The number is 586-949-3400.
Can't wait to see some timeslips!
------------------ Mike L.
1987 IROC Z 5.7 TPI A4 3.27 Borg-Warner four wheel disc Mods: Custom PROM and exhaust and a sh!tload of free mods :)
Matt; I would be very interested in finding how the Haltech ECM works out. From what I have heard the Haltech is reliable but very difficult to program. I ran the DOS evaluation version of the HALTECH E6GM program a short time ago and it appeared straight forward, but starting from scratch on the development of an engine management program IMO is quite a chore. As for your swap, all I can say is beautiful job. Thet 3.4TDC should take real well to turbocharging. I'm envious.
How about supercharged I just bought a M90 SC (off ebay, for dirt cheep) I have to come up with a way to mount the thing though. So far, I have only came up with one way to mount it.
I make a large airbox simular to Matt's but much shallower with the fuel injectors inside it, and a nice flat top to mount the SC on. Its hard work, but would keep the profile low, perhaps a small scoop on the deck would suffice. There just so happens to be a pulley, right about where the SC would be, that does absolutly nothing, but hold a belt. I want to put it to good use. This should be an interesting project. Unfortunatly I have to turn the SC slow for low boost, my compression is way to high for good boost. The sound of the SC is almost enough for me, should be good for an extra 40-50 horses. Just have to program my 1227727 computer with the Grand Prix turbo code, and modify that some. I have alot of work ahead of me.
------------------
IP: Logged
07:18 PM
qwikgta Member
Posts: 4669 From: Virginia Beach, VA Registered: Jan 2001
I was just looking over this site, http://mae.wvu.edu/~mhawkins/super34.htm Is that yours? (not many M,Hawkins out there) Many people have wondered about this project, did it ever go? what happend to it? Inquiring minds want to know...
. 
