I have proved that at the track winding third out to 7800 stock valve train, or shifting to fourth. Every time holding third was faster

 

Why do people even question the guy running 3rd on the all time 1/4 mile list on this forum. Puzzles the **** out of me.

 

Hey usmc what did you max out on your swapped lsj? And what kind of mods n timing n boost were you running?

 

I never really maxed out the car. It had plenty left in it, I just got lazy and forgetful with it one day and made an irreversible boo-boo. That's not something you can do with an aggressive tune and the constantly fluctuating temperatures of Autumn.

The most I ever saw out of the MAF was 49lbs/min. At full boost, I ran 22psi, a 12.0AFR, and 18* timing. My AFR & timing on spool up were fairly aggressive though. The AFR started at 14.7 and ramped down to be at 12.0 once I hit about 15psi... and timing started in the low 40's and worked its way down. Switching to that AFR & Timing ramp took a good 400-500rpm off of my lag compared to flat lining the AFR and having a more traditional timing map. The mods that mattered were the billet HP5557e (T3 .63A/R), ETS 7" Street Intercooler, short routing the piping (2.5" all around with an 8" long section of 3" for the MAF), custom return style fuel system, Vulcan Intake Mani w/ phenolic spacer, and a custom turbo manifold built for flow and top end power - which had a cracked runner.

 

there are options out there

your so close to the stripe that even though your loosing momentum from the cams falling off your loosing less from the shift to fourth

 

Of course there are... just not as easy as the majority of other sport compact cars available.

 

there are several different sets of springs to be had with different types of retainers as for cams you can go to zzp or go custom for the lsj you need 2 intake blanks from a l61 and you can get those from c.e.d. along with the hexes for to drive the sensor comp can grind cams and and install te hex properly

so yes the options are out there and found rather easily

 

Sounds like a hell of a car. What kind of boo boo did you make btw? Im just excited to finally be getting my order in this week THANK GAH.... You should check into my swap thread maybe give me some pointers on somethings.

 

I didn't retune for a temperature change. 60* one day... dropped to 45* the next. I went to grab something from the store and not even thinking about it on my way home, gave it full boost in 3rd.

12.0 AFR on a 60* day became something like a 12.7 AFR on a 45* day.




The #4 piston didn't like that.

 

Yes we've talked about that. I've even short shifted to fourth though before the trap and still ran slower. I'm sure on the new setup ill have to shift to fourth, although now that I'm at 8200rpms it may help but this turbo eats the rpm band up now lol

 

I am spinning to 7500 on stock cams and while its not making more power its holding the power from 4500-7500 so as not to shift as early. I am running valve springs and balance shaft deletes with no issues except the crappy tensioner allowing slap at higher rpms. Going to fix that soon. I would say however 7000 was the limit on making power on stock cams and I shift around 7000 anyway. Its nice though to know it will continue to pull over 7000 and not drop the power like other cars. LSJ cams are good cams.

I however did all these mods not for the stock cams but to run zzp cams later on for extra power later on. I will bump my redline to 7800 and call it done. The stock rods are not chromoly like 4330 steel but they are 5115 Chromium steel. Stronger than LNF but weaker than aftermarkets. I am running them with billet pistons and chromoly spun sleeves in my block. I would feel good about daily driving the car at 500 whp. They probably could do more but then you have to deal with drivetrain breakage. I hit my 400+ goal with the 20g but to my next goal would be 500 on a different turbo and still daily drive it.

Also if you supercharger guys following along, running those revs will require more work to your crank keyway. The supercharger puts extra load on the crank pulley and with an ATI balancer and a supercharger on the end of that crank the key ways get chewed up.

 

Well the ZFR sold today. So again time for a new turbo capable of some huge numbers. lol

 

a turbo is no different when it comes to the crank key

 

Good thing I'm taking care of it anyway

And my s/c shouldn't be putting all that much stress on the crank; it'll be hardly working

 

A lot less load on the woodruff key when the blower isn't there anymore. I am also on a built valve train and was running zzp cams. Reason I'm back on stockers is because they were a blower grind. I will be contacting comp directly this time around for a nice turbo spec cam. And that's the point I was making with the stock cams even though the power stops increasing after 7k it doesn't fall off and is better to maintain that gear than shift into a lower rpm making less power.

 

not just less power, lower gear ratio. at Xhp, 3rd accelerates faster than 4th.
using VirtualDyno and lying about what gear you're in can give you some useful info...

 

a built valve train has nothing to d with the crank key and just because your not spinning the blower dosent mean you wont shear the key your a lot less likely to shear on a blower then a snail because of how the power comes on a snail is a lot harder on the bottom end the a blower

 

You misread my post. I wasn't saying a built valve train is easier on the key. But not spinning the blower and less rotational force (blower deleted) is easier on it

 

and I would have to disagree to a point having a snail is harder on the key

 

Who's sheered the keyway?

 

ive seen several on he verge of breaking discovered on engine teardown and I do know of 2 that have been sheared

 

Makes me a little worried looked pefect when i did the head and nbs

 

i did on a 1k hp vette

no relivance to this conversation, but it's a gm damnit

 

Lol well that's understandable

 

its not something that's going to happen over night but after a while of zipping these engines up it something that needs to be taken care of