What would be an optimal setup? It would be with a stock bottom end, MTI stage 2 LS6 heads, ~11.5:1 comp (or as high as you can go and still run 93), LS6 intake, 1 7/8" step headers with custom designed merge collectors into dual 3" to cutouts, <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> in a M6 shifted at 6800 that never sees below 3000.
I'm thinking ~250/250 .650/.650 111 LSA. Obviously you can go much bigger with a solid roller than a hydraulic and maintain streetability, but how much bigger? I'm not sure about piston/valve clearance, how big of a deal is it to notch your pistons? Maybe a little bit of a reverse split pattern would work better w/ a LS6 intake.
Thoughts?
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

<small>[ April 25, 2002, 10:28 AM: Message edited by: Onyx LS1 ]</small>

 

You did say stock bottom end? Well, you can forget the idea of using the 250/250 cam. LOL You would be spinning the motor to well over 7k to make that cam work. Stock bottom + 7500 shiftpoints = BOOM. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> If you have a death wish for your motor, go ahead and see what that cam will do. LOL

I was using a solid roller on the stock bottom end about a 8 months ago. Cam specs were 230/230 .612/.612 112lsa. I shifted the car at 6600 and was running 11.3:1 compression. The cam was chosen to save the stock bottom end. We did have to notch the pistons for the intake valve, but that is not hard with the proper ISKY tool. The car ran 11.16@125.59 (1.66 60'), so the setup ran extremely well.

Project Solid Roller

However, if you plan on sticking with the stock bottom end, I would not mess with the solid roller setup. There are too many hydraulic cam setups making awesome power in the rpm range you stated above. If you really want to do a solid roller setup, build the bottom end and REALLY put a solid roller in the car. Also, the LS6 heads would be a very good choice in this application.

A properly setup heads/hydraulic cam package can run 10s in a M6 if that is what you are looking for. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I think that sounds like a pretty good idea. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

<small>[ April 25, 2002, 02:07 AM: Message edited by: Jason99T/A ]</small>

 

imo, you wouldn't need that big of a primary on that small of a motor

from what i've been told you only need those large tube headers for large cubic inches (415+) or those with HUGE nitrous shots

the duration on that cam would be good, but that lift is A LOT. Expect to change springs at least oh i dont know.......4-5times a year if not more and at $300 set of GOOD springs...they add up

 

What kind of spring pressures are you running with your current solid roller cam - Are you still using the tiny 8mm stem valves ?
IF YOU DON'T MIND ME ASKING - JASON ! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

Dave,the duration you listed is a little big for staying under 7k.The lift is cool,heck you could go more with LS6 heads if everything is set up properly.But like Jason said,the stock bottom end is touchy <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

E-mail me for all the CORRECT info for running a solid roller to run KILLER times <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

Ok I was just guessing with the duration. I was wondering what your setup was Jason,
I guess it (230/230 .612/.612 112lsa) was chosen for the same application, with LS6 heads it would be better off with a little more lift I would think. Would you go any higher than 230 duration though? (staying under 7000)
Ok next question, <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> how high would you rev it with a built bottom end?

Jason, I agree with staying with hydraulic with the stock bottom end I'm not going solid any time soon. I was just curious what a good solid roller setup would be in case I found a few grand under a rock or something. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jason99T/A:
<strong>A properly setup heads/hydraulic cam package can run 10s in a M6 if that is what you are looking for. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I think that sounds like a pretty good idea. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"><img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" /> <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" /> That's the first goal.
-Justin

<small>[ April 25, 2002, 10:51 AM: Message edited by: Onyx LS1 ]</small>

 

Onyx LS1,

The boys at Thunder Racing are working on this kind of set up for me as we speak. The only difference is that we have changed the bottom end. (new JE pistons ,Oliver rods & .05 bore). Danm dirt in the motor <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" />

Iam hoping to run 10's with Head/Hydraulic cam set up! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

The Hot Rod should be finished around May 11 or 12. I will post results as soon as we hit the track.

PS. I still owe you a carbonated beverage for that 11 flat you ran at HRP a couple of months ago <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />

Coach 02Z28 M6 Drag Racer <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />
Mod's: Almost Finished <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />

 

VAP: The springs were setup at 205lb on the seat and 500lb open pressure. The valves were 11/32.

Justin: I think my setup would have benefited greatly from the LS6 heads. If you are doing an all-out 346ci setup, then spend the extra $$ for them and choose the cam accordingly. You could get away with a slightly bigger cam on the stock bottom end (keeping the RPMs below 7k), but I wouldn't push it. I'm spinning my stock heads/TR cam setup to 6800 all day long, but I wouldn't feel safe doing this all the time. That's why I have a spare LS1 ready to be assembled w/ forged pistons/rods this summer. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Then, we can rev the crap out of it. LOL With the built bottom end, 7500 is the most I would go on a consistant basis. You will wear the motor out spinning it up that high, even with the forged internals. It will just life a longer life compared to the stock parts.

Coach: I can't wait to see how your setup turns out. I think I'm just as excited as you are. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> We will hit the track pretty soon with it. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

<small>[ April 25, 2002, 11:52 AM: Message edited by: Jason99T/A ]</small>

 

Ok the solid setup was just an idea. Right now I completely agree with Jason, it really isn't worth doing if you aren't gonna throw down the cash for a built short block also.

I am gonna go with a max effort, relatively streetable, hydraulic cam setup.
Here's what I am thinking... MTI Stage II LS6 heads w/ dual springs, 11.5 comp, 224/224 581 581 112 LSA XER cam, LS6 intake, and Dynatech 1 7/8" step headers w/ merge collectors.
I am already running that cam and may go with a little more duration when I put the heads in, but I am more than happy with it right now. The LS6 Heads and step headers are questionable decisions, but I would rather have them now incase I go with more cubes later on. I think the 346 may even benefit from the 1 7/8" since it will never see low RPMs, right now I launch at 6000. Also I think 11.5 compression is about the limit for 93 octane in the summer, but I want it right at the limit.
Thoughts? especially on the 346 w/ step headers?
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

 

With the forged internals, JE pistons, and Oliver rods, are you keeping the cast crank? Any plans on the crank?
Louis

 

G2 LS1,

The plan for now is to run the stock cast crank for this racing season. When we freshen up the motor for the 2003 season we will change the crank and maybe some other things also. Man, I can't wait for my Hot Rod to be finished it has been six week with no racing. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

Jason, We will be pulling and slamming gear very soon! <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />

Coach 02Z28 M6 Drag Racer <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />
Mod's: Almost Finished <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />

 

Justin, that looks a real nice setup you have planned there. I see we think alike <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

I haven't seen anyone gain a ton of HP using the LS6 heads on the stock 346ci shortblock and a mild cam. If you have the $$$ and do plan on future upgrades, then by all means get them.

I personally would go a little bigger on the cam specs if you want to run 11.5:1 compression, especially on 93 octane. The cam you listed creates a ton of cylinder pressure and, coupled with the high static compression ratio, might be just a little too much in the summer heat (as far as detonation goes). The cool thing about compression is that it does allow you to go bigger with the cam and not really loose as much driveability. Compression is free HP as long as you pay careful attention to detonation, etc.

I think you are really going to have to be spinning the 346ci motor well in the upper 6600+ rpm range to see the gains of the 1 7/8 headers. I'm going to try a set of Grots in this size much later in the summer to see. From I have read, it uses the same y-pipe as the 1 3/4 Grots. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> So, it should be a real nice comparison between the two.

Jason

<small>[ April 26, 2002, 02:52 AM: Message edited by: Jason99T/A ]</small>

 

Justin, I replied to your email.