Series I performance parts - **Updated Page 1** - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 08-28-2004, 02:26 AM   #31
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Quote:
Originally Posted by SSEi95
What would be the recommended upgrades? I am looking for both Rockers and Cam. What else would I need (springs, retainers, etc...)???

Otherwise just put me down for the Rockers and Cam after the 1st of the year (maybe sooner).
Some good reading: http://www.boyleworks.com/ta400/psp/RockerArms.html

Smellbird - Isn't beehive a recent invention? I dunno, I only recently started reading about them. In anycase, no they're not. That and they're only like what, 81# at 1"...or was it 70#...I could look back through my 9324 page rebuild I'm sure I say it there but I think its 81# and mine were crapping out at 70something#...anyway, pretty weak
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Old 08-28-2004, 09:49 PM   #32
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weel I'll take 1 set of high ratio rockers ASAP. and I can afford them now today.
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Old 08-29-2004, 10:11 PM   #33
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Default cam and rockers

I can afford to buy now, However which cam are we talking about? I prefer the medium performance version due to being driven daily.

Steve
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Old 08-29-2004, 10:26 PM   #34
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Well, I just got a check from my sister yesterday from a one month loan I floted her about a yar ago... Anyways, I should be able to buy now if needed for a group buy.

I am also wondering what our options are? I did read that link (good info ) but I think I have just as many new questions as were answered. It appears that the best plan is to plan for both rockers and cam at the same time since they are so closely related to how the valvetrain works. So what our our options / recommendations for:
  • Cams only
  • Cams and Rockers
  • Rockers only


Would any of this require custom burnt PCM'*? Do we have the clearance in the vavle covers for all these options? How about clearance insode the cylinder head?
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Old 08-29-2004, 11:16 PM   #35
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Well this is your cam options:

Part#-----Valve Timing-------Duration-0.75"dur-ValveLift---Power range
7741561 IN.23/59 EX.68/16 262 264 193 202 .440" .440" 1500-5500
7741562 IN.22/64 EX.70/20 265 270 201 206 .440" .440" 1800-6000
7741563 IN.25/65 EX.72/24 270 275 206 210 .472" .472" 2000-6300
774757 IN.31/65 EX.71/25 276 276 210 216 .494" .508" 2200-6500

I'd suggest the 7741562 with rockers for most people. I think it will be a strong combo and still retain low end driveability.
The 77415623 can be used without rockers for most and would need complimenting mods (springs, exhaust ect). The rockers are an odd number (1.72) because thats about as big as will fit under stock covers.

As with anything what else you need to upgrade depends heavily on how worn out the parts are now. When I pulled my springs they were about 10# under spec, would have probably been a problem with high lift/duration. I can't say yes or no to the 7741562 but I would strongly suggest new/upgraded springs for the 7741563 or higher.
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Old 08-29-2004, 11:19 PM   #36
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HOLY CRAP, uhm...that was me (DRJAY!) not will saying that. He accidentally left himself logged in and I didn't notice. Again that was DRJAY with the above post...I'll be back later, I have some accounts to delete lol
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Old 08-29-2004, 11:22 PM   #37
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Project "BonEvil" is on hold while the Bui gets some attn. but by the cold season I should have some money to play with the Pontiac...figure im in for the cam and rockers.......figure sometime after christmas for the funds to be here though. I want to do this as a winter buildup and that should give me january to get er done!.....Also is there anything said about porting and polishing the heads and intake mani....I meen will these parts work if this is done? I would probably suggest GmTuners for the custom ECU and when I get all the stuff together (i.e. cam/rockers/valvesprings/port and polish) I will get all the numbers together that they will need and get a dyno done so they can get all the proper figures for the perfect ECU. By the way I dont suggest WestersGarage anymore because when they did my chip (although drivability was great) they spoofed a tranny code that made it act like a stall converter and thats not good for street drvin!......So when I have GmTuners do it I will have them run it with no changes to the tranny codes except for the shift points increased, Im thinking with the right cam/rocker/spring combo around 5800-6000 rpm shift points.
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Old 08-30-2004, 10:37 AM   #38
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Should any of those things work an an LG3 ('87) engine? I'm thinking no but...
mike d(iaz)
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Old 09-07-2004, 01:51 AM   #39
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now does that only apply to series 1 */c
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Old 09-07-2004, 04:29 AM   #40
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Quote:
Originally Posted by MikeDiaz
Should any of those things work an an LG3 ('87) engine? I'm thinking no but...
mike d(iaz)
I would say....I don't see why not. But I can't be certain of it. Aparently mid-year they changed to 0.057" longer pushrods and I'm not certain about how that will affect it. I doubt much at all but the place to ask would be www.streetcommodores.com they have a forum on there and its chock full of guys down under that are modding these engines. Matter a fact http://www.bonnevilleclub.com/forum/...045&highlight=
Scroll down halfway and check out the pics. I believe his was an 88 but I can't recall.


GAMEOVER - No these parts are good for n/a engines also.
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