I have a
1. scoggin l92 416 short block with -2cc valve reliefs

2. LPE (Lingenfelter) ls3 cnc'd cylinder heads that flow 348cfm at .600 lift and 229cfm at .600

3. I also will be purchasing a FAST 102 ( ported) and 102 TB.

4. I will be 11.8 -11.9 on the compression

5. I will be running a comp cam 247/259 113+3 with .625 lift on both sides using LsL lobes, this is a cam that comp spec'd me out.

6. All using a set of Yella Terra RR's.

7. TSP's 1 7/8 headers

My goals are getting in the 550 rwhp range, what do you guys think?

Go easy please

 

Thats a high number for L92 heads but I really have no idea if the vic jr will help or hurt you. Ive seen all sorts of hit and miss combos with elbow/single plane set ups and I have no personal experience using one on an LS build. I'm more curious than helpful in this post so I too wonder what other might have to say. Sounds like a fun build though. Good luck with it

 

I think that the airflow is there for 550?

PatG where are you?

 

[QUOTE=
PatG where are you? [/QUOTE]

He is at the end of a $25 bill. Lol well worth the investment.

 

Whatever it might be capable of making the elbow will kill it. You'd do better with a heavily modded FAST 102 and a different cam.

Just my $.02

 

Uhh Im not asking to spec me one, just HIS .02 on the cam. Thanks for your comment, I know the investment is worth it.

 

Did you look at his sig? He's already been down the path your taking and made excellent numbers.

 

Uh yea I've seen his sig and have read all of his threads. But did you see what I'm building? He has a 6.0 w/l92 heads and the similarities end there. I'm trying for a max effort 416 here. But regardless forget about Patrick and stay on the subject please.

 

Yea I've been reading about the damn elbow and calling sponsoring shops all over the country and they are split on this subject. Some say hell yea go for it you'll be fine, while others say absolutely not!! So I'm getting a FAST 102 so I don't leave it to chance. Do it once and do it right!
Thanks

 

That cam has way to much overlap IMO. 15 degrees should be enough for that 70-65% airflow. I'm still waiting to get my patG specs on a similar ls3 build, but comp spec'd me a 251/263 for it. Way to much cam for the fast intake.

From every thread I have read on these heads it seems like from 230-250 intake duration the power doesn't really change much more than 20hp. But obviously drive ability goes to crap. So why give up 3500 rpm and lower drive ability for 20 peak horsepower, and lose 40 ftlbs down low? Only worth it in a dedicated drag car. Wkmcd's build is a great example

 

I don't really care too much about drivability ( seriously? It cant be that bad) or choppiness or MPG or cam surge to tell you the truth, it takes away from the fun factor. Don't get me wrong I'm not driving a hoopty my car is pretty meticulous and I don't want a junk build. My goals are 550rwhp effortlessly, so we'll see.

 

That fact that your so dead set on achieving one peak number on a curve really says it all - dont know why you asked for anyones advice if you dont care what they have to say.

best of luck.

 

I think you will be real close. The cam has to be right for these heads. The Fast 102 is a good idea. IMO I would stay away from the Vic Jr with an elbow. Run a 4150 set up then you will see 25-50 more horses. Again the cams will be different for this then a plastic intake. Why are you only worried about the peak #'s. the great thing about the 92 heads are the power they make though out the whole range. They do this with small cams compared to other heads. Good Luck.

 

Yea I'm staying away from the Jr and elbows and 4150's all together. It's not an all out drag car, but it is a very clean car and I only take it out on the weekends to shows, but now that I got my 9in, rt66 here I come (we call it the 10 bolt killa track cause it's so sticky lol) 5k launches here I come lol.

The 550 is not just about peak power, but that is a goal that I want my motor to make. I know I have to change the cam specs, I was thnking about a 247/259 .625 on both, but on a 113+3. Whatch you think?

 

Im sure a great tuner could maybe make it live able since its an M6 with 4.11's, but if you only need 15-16 degree's of overlap why go with 27? With all that overlap though, you should hit 550 if you can rev it high enough.

This was a fun read, sort of not relevant anymore since your using the fast intake:http://www.gmhightechperformance.com...get/index.html

 

It was a good read, and when I saw that the low profile elbow being used only left a few hp on the table, I thought I would be ok, until I posted here and then because everyone is a GM engineer on tech LOL I started calling Ls shops across the country and they were split on that damn elbow lol, so I decided to save for a FAST 102 FOR A few months since I have til the around March lol.
I do have a good tuner, the cam specs are coming from Comp cam so it's not just a number I made up. I'll have to ask this question to comp on Friday when I'm off so we'll see what he has to say about the overlap thanks for your I sight. Appreciated!

 

Have you considered calling LPE for some ideas on a grind? They've been doing it long enough, they did the heads, I'm sure they've at least one 416.... Hell, they would probably spec one for you depending on your goals. Probably be a pretty good starting point if you're looking for a 'combo' and save you some time calling across the country and/or surfing "GMengineer.com"....

....and lose the elbow.

 

I think you'll make it. The deal with the elbow (IMO ) is that people don't have the right cam for that set up. We made 508 through an auto, with a fast and being a 6 speed you'll make more then that.

 

The elbow is just another compromise...just like a big overlap cam is a compromise of drive ablity and low end and a low overlap is a compromise of top end power.

I was playing around with your cam specs and the 416cid last night. I put the 247/259 on a 116+3 and 113+3 against a lot of different grinds. The two winners that I would pick if it were my car were a 238 (XER) 247 (LSL) on a 114 and a 235 (LSL) 251 (LSL) on a 115. They were both very similar in power, the 235 carried just a little bit higher. Both had over 40-50 more ftlbs at 2000rpm and 20 at 4000 along with 20 more hp under the curve. The 247 cam only made more power after 6200 and it was about 20 more and carried it out much farther obviously. Im no cam guru but I love messing with this stuff and just seeing what the different grinds do. It really all depends on what you want the car to do and how you want it to perform. Just glad I could be of some help.

 

DAMN!!
I appreciate the research to help me out!
Can u pm me how you did that? Lol
I'm gonna ask comp about these grinds for sure.
I did ask LPE about a cam and never said they spec'd out cams. They would just offer their own grinds and no special orders.
Thankyou