Cam and heads question for an Iron 422
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Cam and heads question for an Iron 422 I'm working with a friend on getting a 422 setup rolling. The motor will be installed in an Escalade, so weight is a factor (5500#s+). This will be a semi-daily driver and may get about 10K miles a year. The vehicle should see the track a few times a year, but its primary purpose is for the street. Will have long tube headers but also have high flow cats and mufflers. It must be reliable. Most likely will have stock truck accessories, including the truck intake manifiold. Will see the occasional use 100 - 150 shot of the good stuff. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Motor will be a standard forged iron block 422 from an LS1tech sponsor (4.030 bore x 4.125 stroke).
I need some suggestions on cam selection that keeps low end torque and doesn't require it to spin past 6500. Needs to idle well and have excellent throttle response. Reverse split due to intake?
What should we look for in a set of heads for this cubed motor? I don't think we would want compression past 10.5:1 (unless someone convinces me otherwise). I'm afraid of low rpms under load with this much weight. Must be able to run on 92 to 93 octane with no problems.
Any help would be very much appreciated. We are not expecting 500 hp from this Escalade, but 450 hp and 500 tq would be nice. <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" />
Richard
Motor will be a standard forged iron block 422 from an LS1tech sponsor (4.030 bore x 4.125 stroke).
I need some suggestions on cam selection that keeps low end torque and doesn't require it to spin past 6500. Needs to idle well and have excellent throttle response. Reverse split due to intake?
What should we look for in a set of heads for this cubed motor? I don't think we would want compression past 10.5:1 (unless someone convinces me otherwise). I'm afraid of low rpms under load with this much weight. Must be able to run on 92 to 93 octane with no problems.
Any help would be very much appreciated. We are not expecting 500 hp from this Escalade, but 450 hp and 500 tq would be nice. <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" />
Richard
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Re: Cam and heads question for an Iron 422 My 427 MTI ironblock is being built right now and i am going with MTI battle tested and awesome performing MTI stage III LS6 heads and hyd. S1 cam with specs. of 244/244, .612 lift on a 112lsa. You can have MTI make this cam on a 114lsa for you for better idling if you would like.
THe above suggested H/C set up on a 112 lsa has put Nineball into the 10.6 range (N/A on his 436cid) and he uses his car as a daily driver and it is reliable as heck. This set up has also put many LS1 into the 10s on motor and some in the 9s on spray and of course its biggest claim to fame is putting the COLONEL's f body in the 9.8 et range on MOTOR and no spray on MTI's 422 cubed resleeved alum block.
May as well spend the little extra $ and go with a proven winner.
Best of luck,
MTI 427 C5 Roadster
THe above suggested H/C set up on a 112 lsa has put Nineball into the 10.6 range (N/A on his 436cid) and he uses his car as a daily driver and it is reliable as heck. This set up has also put many LS1 into the 10s on motor and some in the 9s on spray and of course its biggest claim to fame is putting the COLONEL's f body in the 9.8 et range on MOTOR and no spray on MTI's 422 cubed resleeved alum block.
May as well spend the little extra $ and go with a proven winner.
Best of luck,
MTI 427 C5 Roadster
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Re: Cam and heads question for an Iron 422 Thanks for the reply. I understand going with proven MTI stage 3 heads. But camshaft selection is going to be important.
Certainly there is a better camshaft than the S1 for this project. I'm not knocking the S1, its just that a daily driver Escalade will require different things from this motor than most C5s would. It will have a mild stall, need super tame street manners and idle well.
I think we are willing to give up a little from the max power of the 422 to get a super torquey street sleeper vehicle with good manners. Know what I mean?
Certainly there is a better camshaft than the S1 for this project. I'm not knocking the S1, its just that a daily driver Escalade will require different things from this motor than most C5s would. It will have a mild stall, need super tame street manners and idle well.
I think we are willing to give up a little from the max power of the 422 to get a super torquey street sleeper vehicle with good manners. Know what I mean?
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From: Elmhurst, IL (Chicago Suburb)
Re: Cam and heads question for an Iron 422 Yeah that make's alot of sense on a daily driven escalade as the S1 cam is very aggressive. Take a look then at the MTI R1 cam that the owner of MTI (JAYSON) has in his 436 LS1 stroker and that cam still makes big power and idles like stock in a 422 from what i have read about. I heard that the R1 is very civil in fact and in addition to the great street manners of the R1 Jayson still put down i believe around 490rwhp thru his M6! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
The R1 cam specs may be perfect with specs of 232/237, .560 lift and 114 lsa. The R1 cam may be just what the doctor ordered. Check it out and do some research on it and of course talk to the guys at MTI on the R1.
MTI 427 C5 Roadster <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
The R1 cam specs may be perfect with specs of 232/237, .560 lift and 114 lsa. The R1 cam may be just what the doctor ordered. Check it out and do some research on it and of course talk to the guys at MTI on the R1.
MTI 427 C5 Roadster <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Re: Cam and heads question for an Iron 422 I would also say that the R1 is a good cam. Go to lunati and ask them what cam they recommend. You can get a custom grind for like $375 to your door, and they are great people to deal with. A good set of milled 6.0 L stage 2 heads should cover you. Any of the sponsors could accomidate you with those. I would stick to 10.7-1 compression so that you avoid detonation problems on pump gas. Otherwise it should be a beast.
Re: Cam and heads question for an Iron 422 2 important questions...
1) Does it need to pass emissions? I'm not sure how much duration you can get away with but I am thinking maybe mid 23x's duration with like a 115-116 LSA will idle well and pass emissions... not sure though.
2) Are you towing too? I'd keep it under 11:1 not sure how the load of towing 5000-7000 lbs will contribute to possible detonation issues.
I had a 244/244/114 idled well but still a bit choppy..
I have a 242/242//112 and it's noticeably more lopey.
john
ARE 422ci iron
1) Does it need to pass emissions? I'm not sure how much duration you can get away with but I am thinking maybe mid 23x's duration with like a 115-116 LSA will idle well and pass emissions... not sure though.
2) Are you towing too? I'd keep it under 11:1 not sure how the load of towing 5000-7000 lbs will contribute to possible detonation issues.
I had a 244/244/114 idled well but still a bit choppy..
I have a 242/242//112 and it's noticeably more lopey.
john
ARE 422ci iron
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From: East of Dallas
Re: Cam and heads question for an Iron 422 Thanks guys.
Since we are in Texas, we can register the truck at the farms address and have no emissions testing. I'm thinking we will keep high flow cats on it, but might opt for some cutouts before them.
I doubt that it will be any kind of tow vehicle, but there definitely wont be any weight reductions to it. More like weight additions, in the way of audio video components and other stuff. Now, I wouldn't put it past this guy to hook up a trailer and try to outrun his neighbors powerstroke. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Since we are in Texas, we can register the truck at the farms address and have no emissions testing. I'm thinking we will keep high flow cats on it, but might opt for some cutouts before them.
I doubt that it will be any kind of tow vehicle, but there definitely wont be any weight reductions to it. More like weight additions, in the way of audio video components and other stuff. Now, I wouldn't put it past this guy to hook up a trailer and try to outrun his neighbors powerstroke. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Re: Cam and heads question for an Iron 422 come on Richard, this is really for your truck isn't it? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> your trying to sneak something past us and then goto that shootout with a secret weapon. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
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From: East of Dallas
Re: Cam and heads question for an Iron 422 Oh how I wish this was for my truck. Its not for me. I'm really helping someone get some real power into an Escalade EXT. Decisions should be made real soon. Gonna be one heck of a project though.
If it were for me, I'd be driving to Nebraska to meet up with you. <img border="0" alt="[driving]" title="" src="graemlins/gr_driving3.gif" />
If it were for me, I'd be driving to Nebraska to meet up with you. <img border="0" alt="[driving]" title="" src="graemlins/gr_driving3.gif" />