Rebuilt and Installed a 3.4PR (Page 4/7)
mattwa MAY 02, 11:46 AM
I highly doubt removing the restriction on the TB neck of the stock upper 2.8 intake will effect low RPM operation, yet it will very much improve CFM where this cam wants to go.
ManMadeChickens MAY 02, 04:45 PM
I agree that there would be power gained by going to a different intake, yes. However, the effects of this cam aren't entirely lost- this motor has more top end pull than any stock cammed 3.4 I've driven/rode in. Most 3.4's fall flat on their face at anything more than about 4800 RPM or so.
no2pencil MAY 02, 06:02 PM
Rating+

Very good write up! Thank you for posting the parts list with links.
ManMadeChickens MAY 04, 12:06 AM
I have three spare upper intake manifolds, and I have been toying around with having some of my friends with the necessary skill and tools to open up the bottom of the TB neck, and get some more volume on the underside.
timgray MAY 04, 01:01 PM
Awesome Rebuild. A quick tip for you now that it's done.

Run a Zinc additive all the time in your oil. you have stronger springs which will wear a flat tappet cam faster, you are putting a lot more pressure on the cam lobes so you NEED the added zinc. No matter what oil you run add some in every oil change to make sure you don't need to replace that cam.

------------------



Get your copy of the Fiero 25th Anniv book at http://www.blurb.com/bookstore/detail/349809

My Motorcycle Camping Hints and tips. http://motorcyclecamper.blogspot.com/

ManMadeChickens MAY 04, 01:28 PM
Absolutely. I'm a firm believer in adding back the ZDDP that's been taken out of modern oil. About 4 years ago, my brother flattened a cam in a completely stock, relatively low miles 3.1 in a Grand Prix. Taught us that lesson!
thedrue MAY 06, 06:19 PM
So I had the privilege of driving this car last nIght! Let's just say it does not fail to put a smile on my face. It runs very well. Smooth acceleration but boy does it pull! Definitely more ballsy than any 2.8 I've driven.

It may not rev to the moon but the midrange torque sets you back and the car just goes. That's where almost all your driving happens anyway. Great engine for the car! Good work Justin!
asealy007 MAY 08, 03:05 PM
Beyond the parts you listed earlier, did you do any modifications to the exhaust system?
ManMadeChickens MAY 08, 03:34 PM
Nothing to the manifolds yet. Eventually I'll open them up. The car has no cat, and a stock muffler.
ManMadeChickens SEP 19, 11:53 PM
Fixed all the broken links to the pics, after a hosting change.

I'll also take the time to note that I've put about 6000 miles on this motor so far, and everything is normal so far. Still puts a big grin on my face when I drop a gear and nail the gas.