Performance Rebuild

[goatman]

While I have the engine out of my Lumina, what are some things I could do to squeeze a few more ponies out of it? I am having Ben do the P+P heads, and a chip upgrade. I have also ordered the underdrive pulley from FFP. What else would anyone reccommend? I was thinking of doing the 96/97 intake swap, is this worth it? I recall reading that it hurts low end somewhat. Thanks for any input.

[Anonymous]

It will hurt your low end a tad, but mainly it will just move your power curver up. It won't make all that much more power, but it will make it at a higher rpm.

[Dave]

if you're going to go with an N/A setup, I'd go with a good set of hypereutectic pistons, if you're going to supercharge/turbocharge/Nitrous-charge your engine, I'd go with a good forged set from CP. Eagle, or Crower rods would be the way to go, I'd stick with the stock rod length, and lighter lifters, better valve springs, titanium keepers, and retainers and use the 2.8 crank for the shorter stroke - it'll lower your displacement, but you should be able to crank out a few more R's.

--Dave

[SappySE107]

no point in titatnium cap and locks, as there isn't much weight to take out from those. The cap could be lighter but its really not that bad stock. If you go with lighter lifters, thats going to be much more weight loss. Custom valves that are gun drilled to lighten them would be the only other route worth taking IMO for valvetrain weight reduction.

[Anonymous]

The 2.8L has the same stroke as every other 60*V6, they are all at 84mm.

[RidgeRunner]

Aaron, STFU!



The 2.8 does NOT share the same stroke as the rest of the 60v6 family.

[Anonymous]

Yah I am. I meant to say that the 3.1/3100/3.4 TDC/3400 all share the same 84mm stroke.

[Gemmer]

be the second guy to get a set of cams and tell us how they work. 500 bucks (not including stuff like lifters/springs)

Or be a lab rat for us and get just the exhaust cams (250 bucks I assume?)

Or just retard your exhaust timing 13 degrees (free)

I think the general consensus is the 95' intake is fine for most, as the 96 tends to do nothing but move our peak HP up 1k rpm!...but Im assuming because of its wider runners, if you have decent work done (like cams or head port) maybe it'll be better...(only one way to find out).

[Anonymous]

I really would like to get a set of cams. But i have no clue as to what specs to try, no one does. The only thing we can go off of is desktop dyno. And mine will need to be different from everyone elses, to accomate a 5000-8000 power curve, and a virtually restriction free intake.

[Gemmer]

Aaron, why dont you call up the shop and see if they can suggest some specs?

[Anonymous]

They aren't familiar with th emotor at all and don't know how it will react to different settings. Trial and error is the only way to find out, and no one can do that.

[goatman]

Trial and error could add up the expenses real quick at those prices. Only thing I can think of is talking to one of the big cam manufaturers, like Crane or Crower or Lunati or someone. They may be able to help some, and thats a lot cheaper than trial and error.

[Anonymous]

Sure is. Problem with the big companies is that they don't see profit. They see 1 guy, who's building 1 motor. 4 cams. Why would they be interested? I mean they can probably sell 10 V8 cams a day, with specs they already know, why put effort in helping someone who's ordering 1 set?

I mean I wish they would-but they have no reason to care.

As for cams, I'll use the sotckers for now, and then just retard/advance them until I get it right. Them sometime in the future I can worry about custom grinds.

[dykz34]

www.chrfab.com does regrinds of the cams for $500. Considering they work on the DOHC V8's, they probably know what they are doing.

[Anonymous]

Yah I don't doubt that they know what they are doing, like they will grind the cams well, accurate, etc. it's the specs I want that's worrying me. I doubt very many of the V8 guys go there saying I want 8,000rpm, and my intake will be restriction free. They are more generic, cams for a mostly stock motor. This 3.4 I have isn't going to be stock.