camshaft?

[beppe180]

hi i have a quick question, i have a 1988 grand prix with a 2.8 L.. and i got a motor 3.1 L from a chevy corscia i m gonna do the swap. and i m also rebuilding the motor before i install it.. i been looking for a good performance cam for the 3.1L i was looking at the one made by crane powermax 2030, they said i can use it then they said no, b/c it dont have distributor. but it states from 1980-1996 now after 87 they switched over to DIS. i know the s10s and blazers r 60 degree v6's too, ppl r telling me yes then no yes then no, so i dont know wut cam i should get for the 3.1L any ideas? which cams will work with what? and b computer friendly at the same time, thanks a bunch

[sharkey]

all rear wheel drive 60 degree v6 had distributors till at least 93. they are the same cam, doesnt matter if it has a distributor or not. the dis motors still have an oil pump driveshaft thats uses the gear on the cam.

id have a look at the comp cams 260h. its .440 lift, 260 duration. ive heard that a lot of people are very happy with it.

[beppe180]

thanks very much! i guess ppl that work for them r stupid? lol any more ideas? anyone? thanks for ur help sharkey

[SappySE107]

Def go with higher compression on the rebuild unless you plan on boost. You can go 12:1 on pump gas, just premium if you want. Otherwise at least use the 3100 pistons and deck the heads to get it close to 10:1. The 260 would be good with 10:1 and the 272 (i think, its 27x) is good with 12:1. The 2030 is all but a waste of money compared to the 260.

[beppe180]

i plan on sometime in the near future to go on boost, so should i just leave my stock pistons then? sorry i'm alittle new still learning. so the 260 by grane would be good? or r u talking about the 260h by comp? thanks for all ur guys help! :P

[SappySE107]

If you are going to boost it, I would still go with the 3100 pistons, or forged pistons to 3100 piston spec. Boost will want an entirely different cam spec for optimal performance. Personally, I would build that one up NA and build up another motor with boost later on.

[beppe180]

alright cool, u guys been a great help! so 260h cam by comp it is then? for now anyways.. if anyone else has any opinions or comments will b good too

[beppe180]

o yea so if i wanna go with the 3100 pistons, they will fit the 3.1L with no problems? and stock rings right?

[geoffinbc]

Yes I would go with a Comp Cam. Get the compression in the 10's. If you cant get your hands on a full 3400 then at least get a 3400 top end. You will really like the performance gains. Running iron head, head gaskets is another way to bump up the compression (I belive iron head gaskets can still be run on 3X00 heads)

[beppe180]

thanks guys! :P

[beppe180]

ok 1 more question before i leave u guys alone sorwyy... with the compcam 260H will i get a lope? if yes its not bad. but will it b computer friendly.. the engine wont hunt for a idle will it? thanks guys for ur patients!

[v6h.o.]

ok 1 more question before i leave u guys alone sorwyy... with the compcam 260H will i get a lope? if yes its not bad. but will it b computer friendly.. the engine wont hunt for a idle will it? thanks guys for ur patients!

i have that same camshaft. Yes it has a lope it sounds really nice moreso with headers

its COMP CAMS part number 16-233-4
260 adv duration
212 dur@ .050
.440 lift.

might as well put on some COMP roller tip rocker arms as well. you can get them with a 1.52:1 ratio or 1.6:1 ratio (stock ratio is 1.5:1)
with the rockers from comp you will need the Old GM 2.8L stud 476530 adjustable rocker arm stud. its the full adjustable M10 stud.

as well either get the Comp Valve springs or the GM Performance Parts 3.4L conversion Dual Coil valve springs.
BUT DO NOT BUY the reccomended retainers or valve locks. they dont work for the aluminum heads. you only need the springs and reuse the stock retainers and locks.

hope this helps.

[beppe180]

cool guys, i'm learning! i was also looking at the valve springs from isky, they have listed, and there double spring,, i can buy as long as there double spring right? inver knew the 2.8 is adjustable studs.. i have a 2.8 i know its 10mm but not adjustable. isn't the 3.1 heads 10mm 2?

[v6h.o.]

they both use a M10 thread into the head. and M10 stud diameter. but the 89/90-95 engines used a stud that had a M8 non adjustable rocker nut.

this doesnt work with the rocker arms.

[geoffinbc]

Dont go too overkill on the springs. I would just get a good valve spring with a damper. Just get what you need to obtain the RPM limit you are after. Going over kill will just shorten the life of your components.

If you do buy double springs then use only the outer spring to break in the cam. Then add the inner spring after the break in process.