carl Posted August 22, 2003 Report Posted August 22, 2003 does anyone make modified rocker arms for 3100 and 3400? I think my car has a 1.6 rockers and id like to get a 1.8 or 1.9 rocker. I have a 96 grand prix. thanks Quote
cutlassdude96 Posted August 22, 2003 Report Posted August 22, 2003 i dont Ive heard any aftermarket rockers for the 3x00. I do know that they are roller rockers and roller lifters. Quote
dbtk2 Posted August 22, 2003 Report Posted August 22, 2003 i dont Ive heard any aftermarket rockers for the 3x00. I do know that they are roller rockers and roller lifters. 1.75, 1.8, and 1.9 rockers are available for the 3800, but it is a 90 degree V6, a completely different engine. None of the parts are compatible. I have been trying to find someone who produces higher ratio rocker arms for the 3.1 or 3100 but nobody does that I can find. Quote
topless94style Posted August 22, 2003 Report Posted August 22, 2003 I guess for the 3.1 i believe you can use rockers from the mid 80s 2.8L engine. i dont remember who but someone on here did it to his grand prix. for the 2.8 from the S10's i guess there was an upgrade to add better perf for the truck engine. Quote
PaPaPooh Posted August 22, 2003 Report Posted August 22, 2003 robby did 1.6 rockers but he said the guide plates? broke from them so he has stockers on now if im not mistaken (don't want to do a search) he has a 3100 Quote
topless94style Posted August 22, 2003 Report Posted August 22, 2003 either way i just remember reading that he did it. man they need to have a wide range of perf parts for V6's like they do for V8's. I hate not owning a V8 anymore. Quote
Mike J. Posted August 22, 2003 Report Posted August 22, 2003 Jeff M. has 1.6 rockers on his 3.1 turbo. Not sure what type and if any fabrication was needed. Quote
carl Posted August 22, 2003 Author Report Posted August 22, 2003 i think you can use stock 1.6 roller rockers on a 3.1 head. I think you have to machine a groove in the head for the rocker pedistial. A regular steel rocker is 1.5 right? Quote
AWeb80 Posted August 22, 2003 Report Posted August 22, 2003 if im not mistaken (don't want to do a search) he has a 3100 I'm thinking 3.1, doesn't he have an early 90's GP 4 door.? Quote
slick Posted August 22, 2003 Report Posted August 22, 2003 Yes, he has the 3.1. The guide plates kept breaking on him, so he took them back out, until he makes his own. Quote
Robby1870 Posted August 22, 2003 Report Posted August 22, 2003 W3rd, the pushrods were constantly rubbing the inside of the "U" in fork on each end of the guideplate, causing a vibration, that eventually broke the fork off, causin a rocker to hit a retainer. Also, they were prolly maxing out my stock injectors. They were really loud with the 1.6s on, now they are back to quiet. Just a heads up, dont put these on unless you want to make custom guideplates. You'll need them, or atleast I did. I also think the roller tip (where it hits the valve) may have had something to do with it. I think the stock 1.6 rollers came in 2000?+ 3400s. So, those should screw right into a Gen II head Robby Quote
PaPaPooh Posted August 22, 2003 Report Posted August 22, 2003 W3rd, the pushrods were constantly rubbing the inside of the "U" in fork on each end of the guideplate, causing a vibration, that eventually broke the fork off, causin a rocker to hit a retainer. Also, they were prolly maxing out my stock injectors. They were really loud with the 1.6s on, now they are back to quiet. Just a heads up, dont put these on unless you want to make custom guideplates. You'll need them, or atleast I did. I also think the roller tip (where it hits the valve) may have had something to do with it. I think the stock 1.6 rollers came in 2000?+ 3400s. So, those should screw right into a Gen II head Robby bout time you chined in i hate giving wrong info Quote
dbtk2 Posted August 22, 2003 Report Posted August 22, 2003 A regular steel rocker is 1.5 right? Yes, stock 3.1 & 3100 rockers are 1.5:1. Quote
carl Posted August 22, 2003 Author Report Posted August 22, 2003 hmm im kind of confused. Does a 3100 use a roller rocker and a steel rocker. I thought all 3100 and 3400 used rollers that were 1.6:1??? So no one has tried to use a 3100 roller rocker on a 3.1 head? Quote
Vegeta Posted August 22, 2003 Report Posted August 22, 2003 You have to machine the head to put 3100 rockers on a 2.8/3.1. Its not gonna max your injectors out! Yeah, 3 hp just pushed them too far... Quote
Robby1870 Posted August 23, 2003 Report Posted August 23, 2003 You have to machine the head to put 3100 rockers on a 2.8/3.1. Its not gonna max your injectors out! Yeah, 3 hp just pushed them too far... Okay, mabybe max out was the wrong terminology, but the slight ticking was considerably louder with the 1.6s in. You know what, I dont want to argue the effectiveness of the 1.6s. Cuz, in all honestly, I dont care what you or anyone else thinks they did or didnt do. I loved them when I had them in, simple as that, and thats all that matters Robby Quote
carl Posted August 23, 2003 Author Report Posted August 23, 2003 robby did you use the roller 1.6 3100 rockers?? Quote
Robby1870 Posted August 23, 2003 Report Posted August 23, 2003 robby did you use the roller 1.6 3100 rockers?? No, I used 1.6s meant for a 2.8 RWD Robby Quote
carl Posted August 23, 2003 Author Report Posted August 23, 2003 o ok. Im going to look in to milling the groves in the 3.1 heads to use the roller 3100 rockers Quote
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