stupid question plz dont flame

[gojo83]

I am getting a stg 3 cam for free and looking to squeeze a few more hp out of it would it be worth it or hell even doable to run slightly longer pushrods to get a little more lift out of the rockers. I snagged a set of 1.6 from a buddy for dirt cheap and looking to see if there is a way to get them closer to 1.7 ratio. I have stg 3 zzp heads that I got dirt cheap also just looking to get this done as cheap as possible. I am seriously asking I cant find legit info and I know we have some smart people in this section. goal is 365-375whp and 400+ wtq. Car already has a rep so might as well turn the wick up a bit more.

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[Yaj Yak]

what's your entire setup?

 

[gojo83]

2.25 gen v ic, gen v, ported lim N* lq4 currently 1.8 HS rr, 3.2 and 20* at wot, paceshitter headers, PLX WB and HPT, PRJ rails, full suspension and some weight reduction. I think it would be upper 280s whp currently but I have ARP head studs and double roller waiting to go with the cam and stg 3 heads with O/s valves 130# springs and a place to run a wet shot. I have 42.5# injectors currently but also have 60# on the shelf so i can run corn. Looking for a 2.8 to go with this setup. i think with corn a 2.8 could be ran at almost 20-21* wot.

 

[1quick]

im pretty sure the lifter will just take up the extra length and it will cause premature failure of the lifter

 

[RICH17]

 

[ZephTheChef]

im pretty sure the lifter will just take up the extra length and it will cause premature failure of the lifter

Yeah, I don't think you can change lift with pushrod length, you'll just bend pushrods or the valves will never close or break other parts. 1.9 rockers, for the win...but you need to figure out what your total lift is going to be and make sure your timing chain setup, and springs are strong enough, and that your retainers/valve seals have enough clearance for that much lift.

 

[ZephTheChef]

I'm no expert on heads though.

 

[gojo83]

im pretty sure the lifter will just take up the extra length and it will cause premature failure of the lifter

ok thx i was kind of afraid that might be the case

 

[Xtant12]

im pretty sure the lifter will just take up the extra length and it will cause premature failure of the lifter

Listen to this guy, he knows what he is talking about!!!

 

[E]

The only stupid question is the one that is never asked.

 

[jdredd]

as long as the head can take the lift.. just run the right springs with it, and
measure for proper length push rods and order a custom cut set.

That way can insure the rocker tip and geometry junk is all correct.

With no specs on the cam your using, i'd stick with the 1.6's and get the proper
pushrod lengths cut and call it a day.

 

[GTPpower]

^^that

 

[gojo83]

Im looking to trade a xp for a s3 with a buddy and was looking to see if I could run just almost .600 lift which is the max lift allowed for besides accounting for the retainers and locks. Im mostly thinking out loud before I pull the trigger on looking heavily for a set of 1.7s but I am sure even with the 1.6 rollers I got off another buddy the difference will be night and day faster than a stock cam and head setup. Delivering pizzas as a side gig allows plenty of time for thinking things while driving to the destination.

 

[Turbocharged400sbc]

id say stick with the xp as the is3 is probably not the best for mpg/daily driving

 

[smug]

XP ftw

 

[10sec]

The heads won't flow that extra lift anyways. So if you stuck with the STG3 cam instead of keeping the XP, the lift it has is more than enough.

 

[gojo83]

so get the s3 and put the yt 1.6s on and call it a day? would that be enough to see 12.5 at 6k+ DA? The issue up here is the altitude is retarded high on some nights the last time i ran this car it only managed 15 flat but it was also 9500+ da that night and the FP shit the bed on the trip home.

 

[10sec]

Shit, up there you should be able to run a 2.8 with your current setup. Have you tried it?

 

[10sec]

BTW, that was far from a stupid question.

 

[Bob Kazamakis]

This guy isn't far from me. Living at 6k feet sucks for hp.

 

[GTPpower]

You should run stock rockers instead of 1.6 rollers.