I'm trying to get some ideas for a friend of mine.
He's building a 87 GN. Here are the Mods he is doing.
1) Stock Block Just honed.. No over bore. Standard rings and bearing.
The more is made to be loose.
2) Stock Rods and Pistons ARP rod bolts.
3) Stock Heads Mild ported, stock valves HD springs.
4) Stock Intake Port matched.
5) Stock Throttle Body & Mass air.
6) Precision TE-60 with a small A/R for faster spool.
7) 3" Huston Stainless Down-Pipe.
8) Stock Intercooler
9) 42.5 lbs injectors
10) Red Arm strong Chips. Street/Strip & Strip only.
11) Stock Rebuild 200R4 & 9" Art Carr 3500 stall & 3.42 gears.
This is all the info i have on it so far.
He was going to run the stock cam in it, But I'm trying to talk him out of it.
I have found 3 cams.
This are sealed power cams.
270/280 194/204 .424/.448 114LCA
280/290 204/214 .448/.472 112LCA
This is a crane cam.
264/272 202/210 .416/.432 112LCA
I also found these cams...
They Are lunati
275/275 200/200 .426/.426 107
294/284 210/205 .456/.440 108
What do you think of these.
The 200/200 and 210/205 cams are good cams and proven. I would suggest you go to a Buick vendor, like Cotton's, Ron's Custom Auto, Red Armstrong, Precision Turbo, etc. for some cam advice.
There are several variations on those grinds, as well as 202/202, 205/205, and much bigger ones (like 215/210, 212/212, 218/218, 220+) and they can help refine your combo.
That said, cams don't make that much difference (and can hurt considerably if not matched to the right components). I've always had good luck staying conservative with a street car.
Rich,
I agree with Ken's cam selection. I also feel that a cam from the200/200 maximum to 206/206 is all you need. Also consider getting rid of the 3500 stall converter go back to a 2800 stall and upgrade the inter cooler.
What opinion do you guys have on the GSCA club 206 cam.
Ken
87 GN
I was thinking about up grading my 87gn with a new cam. Is the 107,I think that is what it is, from postons going to give improvement over my stock cam?
Hey Richard, I also agree with Ken. I think the 200/200 club cam is a good and proven cam. Soon to be upgrading my cam, but currently using the 200 for five years with no ill effects. All I can say it is a great cam for a minor build up or a street/strip combo.. Best E.T. with cam to date is; 11.42@ 120MPH. THE LIFE TO ANY CAM IS PROPER BREAK-IN.
GOOD LUCK, MARIO
Unless the stock cam is worn out, investment in a new cam will bring a lousy return for the dollar. There is little, if anything, to be gained from a different cam until one is into the lower 11's.
Money will return more performance if spent on porting heads, improving stock intercooler, or a slightly larger turbo than stock. A TA49 or TE44 will take you into the 11s with a stock ic and heads....freeing up flow will make it do even better. Remember that we push air into these engines, not suck it in and that is why the cam is not as big a player as it is on n.a. engines.
If you need a cam, any of the cams sold by the Club will work well.