torchedZ

I just read about the LPE GT1-1 cam on their website and was curious if anyone has put it in their car. There's a guy on another forum that's putting it in his Z06 soon so I'm anxious to see his numbers.

How do you think this would perform with a good set of heads? I haven't seen a cam with a split that large....what's the advantages/disadvantages? Would springs hold up with that lift?

Thanks.

cyphur

iTrader: (10)

sheeeeit thats a huge split. also interested in the cam guru's opinions on this cam. i'd guess that b/c of its large duration its largely intended only for bigger cubed motors???

Viper

iTrader: (6)

Bringing this back.

Any new news on this cam? Since LPE is offering a shortblock for $2095 and for $510 more they will degree one of their cams in and add an adjustable double timing chain. VERY tempting to me as my motor is out of the car and I need a replacement and was thinking of upgrading from my current cam. I'm also going true duals, 2.5".

What do you guys think? I would get the Patriot dual gold kit; should be good for the .629 lift of this cam. I just have to get my heads reworked to fix the bent valve.

Anyway, Ed says to shift it at 6500; I figure that's no worse than I'm shifting at now with the TR224.

And the springs should hold for how long at this lift before needing replaced?

Ed says the guy in the vette has 3:42 gears like me and says it's fine driving, I just haven't found any posts about it anywhere.

Thanks for any opinions.

John

NLang

iTrader: (12)

15*? Damn that's a lot of exhaust to intake duration...If you're going with true duals, you definitely don't need that much. Dig into a couple cam threads before making that decision...

Z-286speed

You might want to go with a solid roller with that cam??

NLang

iTrader: (12)

With a 228* .050 intake duration, he wouldn't be reving near high enough to need soid lifter strength-even with big heads.

Z-286speed

Ya, that is true. But, it is close to what a solid roller numbers are at.

NLang

iTrader: (12)

You can have a 200/200 solid, or a 270/270 hydro cam made. The size doesn't Hitler-ize what it must be...It's just recommended that you think about going to a solid cam when you reach a certain point. That point is MUCH larger than 228* and also more than .629" lift.

JZ'sTA

iTrader: (23)

I see no reason for that much duration difference.
If you have solid exhaust then make that split much smaller.

Slowhawk

iTrader: (12)

Looks like it is for a stock manifold car.

grinder11

iTrader: (1)

Check out the last two months or maybe 3 of Car Craft magazine, or online@Car Craft.com. The article you want is "Little Bro", and its about building a 5.3 Gen III motor. When they used this cam with LPE heads and a FAST intake & whatever headers, it made 458 hp ! Not bad for a 325 cube motor, eh. Good reading. The valve springs they used, and this is according to the book guys, so don't shoot me down , are Comp 918's!!! Seems like a lot of lift for a 918, so maybe it's a typo.

grinder11

iTrader: (1)

Cyphur_traq would be correct in assuming it is for larger cube motors also. I was flat *** amazed it cleared the pistons in the 5.3 though, considering it does have .630 lift!! In talking to LPE recently, I inquired about this cam and its use on a stock LS1, read: cam only, and the tech guy told me it is the cam LPE uses in their 427 motor, and it would probably be o.k. in a LS1 as well (For ptv clearance). He went on to say, and I think I remember correctly, it made 506 rear wheel hp in their 427. I did point out that Car Craft had said it used 918 springs, and he said he was not sure if that part of the article was correct without going back and doing some more research. But the project was done at LPE, I believe. If I recall, haven't some members here posted in the past that the 918's were once rated to .625 lift, before Comp released their new dual spring, and then for whatever reason (Marketing?) the 918's were reduced to a .600 lift? Still, for longevity, I would think running 918's in this application would be, uh, user unfriendly !

NLang

iTrader: (12)

A lot of spring makers rate their springs @ .050-.060" less than coil bind depending on what they're made for. (ie: PP golds -.710 coil bind-rated @ .650). Not all are dead on 50-60, but it's sort of a rule of thumb to allow manufacturers to warrent them.

You could use a .700" cam with springs rated much smaller as long is it isn't too close to coil bind, but they won't last long...CarCraft probably just used them because it was a quick series of engine dyno tests. I'm sure they canned the springs right afterwards...

Viper

iTrader: (6)

I did find this from the Truck forum:

https://ls1tech.com/forums/showthrea...ighlight=gt1-1

John B

iTrader: (10)

Don't pass judgement on what you don't understand! The reason for this large split was to help out cars that run CATs. LPE recently did a car with this cam and their CNC'd LS6 heads with the larger 2.02"/1.57" valves retrofitted and this car made an amazing 440 RWHP thru CATs!