What do you guys think of a stock shortblock LT1 with every imaginable bolt-on, 4:11's (MOSER), 6spd, LE3 cam & LE2 heads (using IMPY style head gaskets to raise the compression a little bit), LE ported and polished LT1 intake. First of all with the stock cubes just how nasty is thing gonna sound at idle ? Second, what kind of numbers do you guys think the motor will make considering every last bolt-on is already on the car. I'm wondering if it can't make 410/420 ish rwhp ??? I really want to do a maximum effort with a stock shortblock (my shortblock is incredibly well maintained, oil changes every 500 to 1000 miles and it still runs real hard (3 years ago ET: 12.61 @ 109)) I don't really care how hard the car chops at idle because it never really gets driven except for fun. The harder it lopes the better as far as I'm concerned and gas mileage is not a concern. I'm wondering if the compression with an IMPY style head gasket will be somewhere in the 10.8 to 11.1 compression range ? Does anyone have any idea if there will be enough vacumn with this cam to get good brake pedal feel at idle or will it suffer slightly ? What kind of RPM range am I looking at with this setup, my thoughts are in the neighborhood of 6600 to 6800 rpm's. I would really like to see the car make more than 410/420 ish rwhp, but I think the MOSER will suck 10 rwhp or so.

Tell me what you guys think, I already have a set of 96 #643 casting and matching intake that is getting ready to be taken over to Lloyd. I just sent the fuel rails off to HSW for some AN fittings to be tig'd to the rails for my new fuel system.

 

With that setup we have seen guys do over 120mph in the 1/4, so it works very well.

Bret

 

Isnt that cam going to want to pull all the to 6800-7000 plus? I dont think you want to rev that stock bottom end up that high.

 

I'm pretty sure it will want to pull to 6800 plus, but I'm hoping that my bottom-end will stay together at least for the entire season this year. I don't think I will actually be running it real hard all the time, so that should help with the longevity on the stock bottom end.

 

Yeah... the LE3 cam is recomended for a 355 bottom end that can handle the RPM that you want to turn the motor too. For a stock bottom end the LE2 is a a good bet, gives you the most power in a lower RPM range so you don't beat up the stock short block.

bret

 

You can expect to see very low 11 second 1/4 mile times with a tad bit over 425 hp. That would be on a full weight car with all supporting mods.

I am getting the LE2 package.

 

I agree the LE3 cam might be a little much for the stock shortblock, but I really want to lean on it and have some fun with the stock bottom-end and if it pops, oh well I just got my reason to build a nice shortblock. Can somebody shed some light on the brake vacumn and idle quality with this cam (I assume it will chop pretty hard with stock C.I. ) Will the brake quality at least be decent or will I need brake vacumn canister to help out ?


Wow screaminWS6, You think I will make more than 420 rwhp and run low 11's with my heavy WS6 LT1 car. I think stock my car weighs in at 3515 ?? I would be real happy with those numbers. Supposedly you can't put any bigger valves than LE2 heads (2.00 I / 1.57 E) on the LE3 cam with stock shortblock. The car does have a set of Comp Cam 1.6 RR on it that will be going with the LE3 cam. Does anyone know how close to .600" lift I will be with 1.6's on the LE3 cam (I know you can't give out exact specs, but put me in the ballpark on lift numbers ) Can someone tell me approximately where my compression ratio will be with a good IMPY head gasket. I'm assuming 10.8 range......

 

Do a search for Lloyd on camaroz28.com as there are a ton of people running his setup on that board. You will find so much info there, that you will need to take a vacation from work just to read them all.

I am aiming for around 420hp with the LE2 package, maybe a little less, but over 400. It will greatly depend on the dyno tune.

Contact Lloyd via phone and he will be more than happy to talk to you. I talked with him on Monday night for over an hour on what I want from my car and the best route to go. Great guy!

 

The LE3 cam is only about 1" less idle vacuum for your brakes than the LE2 cam.

Bret

 

Thanks for the quick response. I have read most of the LE threads over at CZ28.com, but most of the guys are not using a LE3 cam with LE2 heads on a stock bottom end. Many of the cars are built motors by the time you get to the LE3 cam with LE3 heads. I'm just trying to play around one last time with the stock motor before I actually build something. Bret what is your opinion on the numbers the setup will make to the ground. I think the brake vacumn will probably be acceptable for no more than I actually drive the car (about 100 miles a year, LOL ) I'm curious on the compression ratio using the Impalla gaskets as to what the increase will be....

 

Now you got me wondering as well, how well will the LE3 cam work with the LE2 heads if I only want to rev up to 6200 for the time being?

 

Lloyd and me actually discussed that very thing on the LE3 cam. We decided for the type of driving I will do with the car and the fact that I'm not gonna beat the crap out of it everytime I drive it. He seemed to think the motor might actually last awhile with the LE3 cam. Most of the time I would not even be taking it much past 4000 in normal street driving. On occasion when warranted (street race or track race) I would be pushing the motor to the upper limits at 6800 ish. I guess I would have LE 2.5 package (LE3 cam & LE2 heads) I'm doing this package regardless, but I really want and appreciate the input on my setup.


Mike

 

When I originally started talking with Lloyd, I basically told him I want an outragous lopey idle, but I had no clue how it would effect everything else. I would be in the same boat as you are, not revving past 4000 except for when warranted and I barely drive my car as well. Ill have to call him and just talk to him again if it makes sense for ME.

 

ScrmnWS6, are you gonna do the ported and polished LT1 intake with the setup ? It's not much more expensive to do ($200 I think).

 

Yup, intake and heads both ported and polished. The whole chalupa.

I was set on the LE2 heads with the LE2 cam, but now you got me thinking about the LE3 cam. Damn you!

I initially wanted the wildest idle I could get that would make sense, and I dont know whether the LE2 cam will satisfy me. Ill have to go home and find a few videos of the idle fo the LE2 vs. the LE3 cams.

 

The LE2 idle is pretty choppy anyways

 

Found a few videos of the cc306 and the gm847 cams, but the ones that I was able to find, the sound was a little distorted.

Anyone know where I can find a good, clear sounding clip of the cc306 and the gm847?

 

Brett, I just bought the LE2 heads, your 2.2 cam and Lloyd is currently porting my intake (M6 Z28). Would you feel that 120ish trap speeds with be possible with this combo, some weight reduction and a good DA?

From my talk with Lloyd, the LE3 cam really would not make much more power than the LE2 cam and would have more midrange torque than the LE3.

 

http://www.lt1engine.com/soundlib/cam.html

You will see my video on there, its LE 3 heads with Brets 2.2 cam. Stock bottom end.

 

I would say thats doable, my car with LE 3 heads, 2.2 cam and a mail order tune with 12.20's @ 116 with a shitty 1.7 60ft in a full weight car PLUS a 12 bolt.

With a better 60ft, powershifting, good weather, weight reduction, low low 11's at 120+ should be easy