Tweet
Just started a 1996 3100 build for my 94 Grand Prix. Engine has roller cam/rockers, and a rediculous dished piston that I am told yeilds a CR of 8.8:1. Would like to boost CR to about 9.5:1 and get a little hotter cam. Any suggestions?
-
-
head decking, thinner hg's, longer rods, swapping the crank out. I think (assuming you used a 2000+ 3100 motor) you can swap in a 3400 crank.
Be careful, you don't want to fall out of the quench area.Lifting my front wheels, one jack at a time. -
Looks like I had some bad CR data. According to this sites CR calculator I have a 9.36:1 CR. Thats ok, But still need info about performance cam for factory roller setup. Engine is a 96.Comment
-
3400 crank is identical to the 3100, 3.1, and 3.4 DOHC so that wasn't good info. Stock compression is supposed to be 9.5:1 but I am not sure if any of those numbers on our calculator are wrong.
I have comp roller cams on wot-tech, with a listing for all the lobes. I also offer a cam selection service, which is free after purchase of a cam. For a 96 you are looking at something around a 206 duration .480 lift cam, since you will need a 97 ECM to do tuning. I know that cam will work with your stock ECM. You should get a 3400 throttle body (56mm) as well, as its a solid upgrade over your stock 52mm unit.Ben
60DegreeV6.com
WOT-Tech.comComment
-
Thanks for the info, checked the website,looks good. These camshafts an upgrade to the factory roller? Also, while the engine is a 96, it will go in a 94, so whatever cam I use must get along with the 94 computer.Comment
-
Then you will be advised to stay 90% stock and nothing internally should be tampered with. Swap to OBD2 and start tuning.Originally posted by aedden1 View PostLifting my front wheels, one jack at a time.Comment
-
or OBD1
Comment
-
Not with a 4t60EEEEEEEEELifting my front wheels, one jack at a time.Comment
-
he never said what trans he was using
But yes he could most likely use OBD1 and $1FA code to run the E trans.Comment
-
Originally posted by aedden1 View PostA 94 GP comes standard with a 4t60sleeezyE.Originally posted by Superdave View Posthe never said what trans he was using
But yes he could most likely use OBD1 and $1FA code to run the E trans.
Why go through all the hassle when an obd2 swap for a GP of that nature isn't really that hard?Last edited by 1988GTU; 06-12-2009, 08:37 AM.Lifting my front wheels, one jack at a time.Comment
-
I'd swap to the large port intake manifolds if you are going to swap a cam. If you have the heads off might as well get a whole 3400 top end or 2000+ 3100 top end. The small port intakes suck!
And yeah with a cam you'll need a tune unless it's pretty mild. But even then without a tune with a mild cam you won't see the full potential.sigpic
New 2010 project (click image)
1994 3100 BERETTA. 200,000+ miles
16.0 1/4 mile when stock. Now ???
Original L82 Longblock with LA1, LX9, LX5 parts
Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.
Comment
-
because tuning OBD1 is cheaper.Originally posted by 1988GTU View Post
HP Tuners is $500 but an Ostrich is $175 plus Tunerpro which is free and a memcal adapter is $35.Comment
-
Not knowing where the guy lives, he could have strict E/I/M testing and would need to retain obd1."5" or higher to pass. A lot easier to manipulate the pcm than an ecu in my opinion.Lifting my front wheels, one jack at a time.Comment
-
to each his own, the OBD1 3400 swap chips i sell have no problems passing emissions.. even with the EGR disabled.
Comment
Comment