I was wondering, how much extra strain does this put on the rest of the valvetrain. I am debating between rockers and a cam. I was wondering this difference in gains and labor involved between the two. Also the difference price as well.

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

any idea what cam and what rockers you're lookin at?

_________________
05 Bonne GXP, click for cardomain


somethings just cant be replaced ... good times...

not really, I daily drive this thing and am not trying to go to the extreme with it as far as performance to be honest. I am open to suggestions. I kinda was wondering what people were recomending or not.

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

These are FI cars, the cams won't be extreme really. You don't want overlap, will just push all that air your forcing in the chamber right out the exhaust valve. The S1X I have in my car is fantastic. Gives it a nice little burble to the exhaust note, real mean sounding. But the idle isn't too loppy.

_________________
99 GP GTX - L32 + Gen V swap (41k) | S1X | TOGs | DP | SLP Catback | 42.5# | FW CAI | GMPP Handling Kit + Adjustable Struts | F-Body Front Brakes | Aeroforce, Boost, Oil, Volt Gauges | Eclipse Deck + Rockford Fosgate Speakers | MSD Wires | DHP PCM | Thrasher Shift Kit

How about the install? I have cammed my hot rod but it is rwd and carbed and used to have open headers, it idled like a freakin monster. I havent cammed a fwd car before. How involved is it exactly? Would rockers be a better move? Or would they put too much strain on the rest of my 145k mile valvetrain? Or would I be happier with a ssic?

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

I am running a PRJ LL cam I have 160,xxx miles on my car its very valvetrain friendly

_________________

Really? Because that is probably the biggest concern of mine when it comes to valvetrain upgrades. I was thinkin if do rockers then I am gonna have to do springs. If I do springs I should probably replace the chain and tensioner. And if I am getting that into it might as well cam it... I am just debating what Iwould be better off doing.

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

The cam I have I am running 105# springs and a double roller by my choice I think Ryan (indy99gtgp) is running a stock chain setup I think you will have to do spring on both cam or rockers

_________________

Rockers are the easiest to do but a cam is the best gain. You don't have to take the motor out to do a cam. You go through the passenger fender well to change it. I run a an XP cam and love it. it lopes but not heavy.

_________________
99 Gtp XP cam, Map intercooler, PRJ fuel rail, Pro magnum 1.6 rockers, Titanium retainer, Wizaird air box. 4 inch Intake pipe, SLP headers, Cat delete, Paceset 3inch Exhaust, GMPP front rear sway bars and rear trailing arms,
HID lights, zzp 3.4 10 PSI. 13.269 @ 106.939 mph.

If I do rockers then I would have to do springs, if I do springs do I need to do the chain and tensioner? If so, then how much more work would it be just putting in a cam?

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

It depends on what rockers you get. If you get the 1.84 roller rockers, you don't have to change the springs. 1.9's, you should change the springs.

_________________


3.5" MPS, 1.84 Rockers, 3" DP, Frt PEM, 39lb Injs., PowrTuner, Wizair
14.07@ 98.85mph 2.180 60'

What are the differences in gains between 1.9 and 1.84?

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

Its a higher lift of the valves. Lets more air in, lets more exhaust gas out. Here is a good article on rocker arms;
http://www.boyleworks.com/ta400/psp/RockerArms.html

It is possible to run 1.9 rockers on stock springs. It all depends on what you have your shift points set at. Also, if you have a higher mileage engine it is not recommended because failure could occur easier.

_________________

'02 Galaxy Silver GTX Coupe. SLP Headers, SLP cat-back exhaust, SLP 1.8 RR, ZZP 3.4/3.25" MPS, SLP hood, SLP CAI, Overkill PCM, 180 t-stat, SSIC, S1 TB, AL 104's, F/R STB's, F-body calipers.

I have 1.9 rockers with stock springs, and I run fine. No valvetrain problems what-so-ever.

_________________
Previous: '99 GTP 246 hp, 350 ft-lbs dyno tested
Current: '07 G6 V6...slow

"Wide open 'til you see God....then brake."

What are your shift points though?

What is likely to fail? The chain? Or is it the tensioner?

_________________
Top Swap, 3.2, P.P.'d Blower, 4" FWI, 103's, polys, 180*, ported N*, LQ4, C.C. S&S Headers, Full Size I/C, HPTuners, FP Hotwire, custom 2.5, 10k Hid's, angel eyes, SS Grilles, blk headlights & corners, avs, tinted tails, custom headliner, aeroforce

WEll it could be a number of things. With stock springs and high shift points, you start getting valve float. Which can cause a major loss of power at the top end. If the valves float enough, you could potentially have the pistons tapping the valve. This would be rare but i could see it happeneing. If you upgrade springs, a new tensioner is a must but is very easy to replace. I though the whole cam installation was simple really but you just have to take your time. While u are in there, check the timing chain for play. Usually if the chain has over 75,000 miles, it is always a good idea to replace the timing set before valve train upgrades. This could be the other point that could fail. The added force on the timing chain will show as added wear on the tensioner which will need to be replaced more often. If a streched chain is not replaced, it could break/jump teeth and then you have to do what i just got done doing and replace your entire engine.

_________________
1999 Pontiac Grand Prix
303HP/353TQ
Mods: L67 swap w/3.25" pulley,PRJ LL cam, speed daddy headers
2008 BMW 335i TT-jb4 tune.BMS intake.AA bOV and charge pipe

well I did the rockers and well I am going cam now need i say more

_________________
03 gs just ur avg bolt on car

Daily driver gone wrong
99 gs beater... the slippery slope car cam/heads blah blah blah

I went with rockers and then cam a year later, there is no comparison performance wise. If I were to do it over I would go cam & headers and would of saved some $ in the long run.

_________________
99 GT (Stock - DD) & 04 Comp G (A Few Mods)
New 1/4 mi. PB @ Pontiac Nationals 2009: 12.79