235 / 243 .621/.624 113 LSA LSR Grind

[evangto87]

I recently discussed a 415ci build but now im also considering a radical forged 346. This would be more of a budget build but in an attempt to still make great power. This setup would consist of running a milled AFR 205 to 57cc set of heads paired with a .040 mls head gasket to achieve 11.58 to 1 compression. Will be running -4cc valve reliefs. Also running a ported Fast Intake with 90mm tb, 1 7/8 to cut outs, ud pulley, etc. How would this cam fair with this setup? Power under the curve? etc? Im really curious to see how these LSR grinds do for peak and under the curve power. Thanks for any info.

[vodas00ss]

Im not an expert by any means but wouldnt you be real close to having valve clearance problems with that cam?

[evangto87]

its a forged 346 so it will be running -4cc valve reliefs. Shouldnt run into PTV issues. Thats the only reason im milling them to 57cc.

[vodas00ss]

cool, didnt know your whole setup...just throwin it out there. good luck with your setup

[evangto87]

thanks. Anyone have any info on this? Even more specific how about some info on the LSL/LSR lobe design. Advantages over XER and how they work top end and under the curve. thanks

[stumprrp]

you know im going to say it, but you could get away with the 3500 stall and 3.42 gears with the big cubes, with this motor you really need more verter and gear my friend lol.

i think patrick G used this cam before with good results

[evangto87]

lol of course i know your gonna say that. The gear will be determined later. Convertor wont be changed. You no where this car mostly gets raced unfortunately so it wont be being setup for 1/4 mile. The compression will be a huge help in getting the car moving down low. My last 347 ran the ms4 with 9.8 to 1 compression through stock 241 heads. As long as i ran a radial tire it stayed in its power band just fine. When i ran the taller slick the shift extension was too much from 2nd to 3rd causing it to fall into a dead spot. With the radial stock 25 inch tire it never fell into this dead spot. All this was with absolutely no compression. Giving it over 2 points of compression is going to broaden the curve quite a bit and give it much more low end tq. From what i read the LSR design seems to give more of a broad power curve as well. I could be wrong on that since thats more my reason of creating this thread.

[stumprrp]

from what i have read its supposed to give almost a solid roller type curve, lots of power everywhere.

[evangto87]

thats kinda what im going for. i like the ms4's design. Its my fail safe cam of choice. But im looking into these lsr designs because if there doing what they say they are, this would be perfect for a crazy power setup all the way from 3000 to 7000.

[Sharpe]

Thread moved from Advanced Tech to Gen III Internal.

[LS1 BU]

That is not a all out 347 cam. I run a more radical cam and drive my ride everywhere. You could run a more radical cam with a good SD tune. I'm lucky as I have an awesome tuner.

[evangto87]

would you mind giving your cam specs? or atleast give a cam in the are of your specs?
239 / 247 .624/.624 114 LSA. This cam is slightly larger. Was thinking this one might fair better for what im looking for.

[LS1 BU]

I use the lsr/lsl lobes on current cam. I'll give specs since I don't like keeping secrets.

239/243 111 lsa 109 icl

Has a good lope. I run this with 11.8/1 comp on pump gas with sd tune. Runs and drives great.

The lobes come out to 240/244 on the cam card.

[evangto87]

Originally Posted by LS1 BU

I use the lsr/lsl lobes on current cam. I'll give specs since I don't like keeping secrets.

239/243 111 lsa 109 icl

Has a good lope. I run this with 11.8/1 comp on pump gas with sd tune. Runs and drives great.

The lobes come out to 240/244 on the cam card.

another big factor in cam choice. I notice u drive around in a diff kind of car. I have a gto. How much does you car weigh? Mines in the 3300-3400 area. Possibly lighter with new stuff pulled out. Id prefer to have a 112 or 111 lsa instead of the 114

[LS1 BU]

Last time I weighed it at the track It was 3600 with me in it. I'm about 165-170 myself. We are pretty close.

[LS1 BU]

Also I would never go with a self grind comp cam for an ls engine. I would have someone spec one for your application. I called comp a while back to spec a cam. They don't seem to now there stuff when it comes to ls engine cam specs.

[evangto87]

yea i hear what your saying. I dont understand the 114 lsa they have with that cam. Id like to get a custom cam speced in that area with a 111 or 112lsa. 114 just seems wrong....

[LS1 BU]

On a 114 I would think you would have to spin it to the moon to make power. Plenty of people/shop can spec you a great cam. Pat G/Pedator/ Speed Inc etc. Go with someone with years of experience with ls motors

[SuperSlow02]

This cam is more for a stock style head/intake motor so I wouldnt say its radical for your build, its what is currently flopping around in my motor except on a 111+4, only drove it for 20 miles untuned and I can deffinently back up the fact that it makes power everywhere, Only made a few quick pulls from 4-6k and I picked up alot of MPH extremely quick . And the Rev range went to 6800rpms, but with no tune I dont want to push it, so its now playing garage queen again..... I would recommend getting ahold of pat G and he'll take care of you, I told him what I wanted to do with the car, and he delivered

Heres what it sounds like http://www.youtube.com/user/Dbrownss.../0/QAezja-R8lo

[HTX]

Just do the 415 and never look back!!!

if you do the 347 you'll only want another build later. at least with the 415 your big concern will be upgrading heads and intake down the road.