Gaspo's 99 trans am project

[super_fro_daddy]

quick search revealed this:

http://m.modernhemi.com/forums/showp...82&postcount=2

[SS4Matt]

I've never seen anyone run over a .620 lift without fly-cutting the pistons for PTV clearance. School me if I'm missing something tho!

EDIT: Just did some reading and max lift occurs when the piston is half way between TDC and BDC.

yeah, it's like that "Magic Dick 4" cam, seemed there was a while there that companies kept pushing the envelope as much as they could as far as height and duration of cams, made for some piss poor quality idle, a lot of surge under part throttle....oh but they sound cool at idle, that's all that really matters anyways!

[mcalus]

Glad I could help you out Jeremy! Thanks again. Leaving you feedback right now.

[Gaspo]

Glad I could help you out Jeremy! Thanks again. Leaving you feedback right now.

I will do the same when I get to my lap top.

[1BADAIR]

Broke or the rollers fell out?

[Gaspo]

Broke or the rollers fell out?

The needle bearings fell out I guess?

[Gaspo]

kevin, the previous owner (super_fro_daddy) sent me this. from the ad where he bought the car : engine mods:

stock shortblock w/853 5.3L heads
patriot dual gold
extreme valve springs
new valve seats/seals, titanium retainers
comp
hardened pushrods
LS2 timing chain, ls1 ported oil pump
LS6 intake ported
throttle body
volant cold air system
thunder racing "trak" cam 640/590L
234/231D 111lsa
LPP longtubes/LPP y pipe
magnaflow rear mount
catback.

trans/rearend:

built T56 from sixspeedinc..stage 4
package
LS7 clutch kit
LS2 flywheel
hurst short throw shifter
4.10
gears/moser axels
alluminum drive shaft


what should i replace the rockers with? if i replace them, i should be all set correct?

[DETROITMUSCLE]

I had this happen to me before as well, those needle bearings make a total mess and get everywhere. If you want to do it right then get the pan off and clean everything they will surly be in the oil and everywhere else. Typically stock rockers work fine but at minimum I'd buy the comp trunion upgrade and do that or you could run a set from Harlan, comp, ect.

[Nocooler]

If the needles fell out - order a trunion kit and reuse what you have.

While you have it apart - would replace or at least test all the springs.

[Gaspo]

what's the cheapest way to go? i'll drop the motor, replace the head gaskets and bolts (heads are almost off). i'll take the oil pan off and clean everything out as best as i can. how do i test the springs? tje retainer on the spring with the bad rocker is chipped/dented a bit. can i just buy one replacement retainer?

[DETROITMUSCLE]

how old are the springs? aftermarket springs like these are recommended to be replaced every 10-15K depending on the cam anyways. I would have them tested, possibly by a machine shop I don't know exactly how to go about that.

[Nocooler]

what's the cheapest way to go? i'll drop the motor, replace the head gaskets and bolts (heads are almost off). i'll take the oil pan off and clean everything out as best as i can. how do i test the springs? tje retainer on the spring with the bad rocker is chipped/dented a bit. can i just buy one replacement retainer?

To test them you need a spring tester - might just be best to order some new springs (Lunati, Patriot, PRC) and go from there. No reason not to if you have it tore down that far.

[Gaspo]

Baker engineering is going to test my springs. What rockers are the best to get?

[c0ncEpT]

Stock with trunion upgrade like already mentioned in this thread.

[sman]

Also, 853 heads are not 5.3 heads..... 853's are stock LS1 heads like 241's. 5.3 heads are 862 and 706. The more recent 5.3 HO, aluminum 5.3's, and LS4 have 243 heads.