441 results.
TECH Fanatic
Joined: Jan 2017
Posts: 1,758
Likes: 442
His heads are fine. Stop trying to convince him they arent it would be a total waste of money to change them. They are capable of making more power than what he is making NA. The car made good numbers and sound well within reason. Should be a monster. Go run it once you got the rear and clutch.
Thread Starter
Joined: Mar 2003
Posts: 1,223
Likes: 2
From: Hamilton Ontario
Thanks for all the comments, the heads were what was recommended at the time and have since been overshadowed by bigger and better. I don't really want to spend the money on upgrading. Not sure why the cam was recommended.
I do plan on porting the intake to match the heads.
I do plan on porting the intake to match the heads.
Lets be real here Orange. You might not be making the numbers of a max effort 442ci and if you wanted you could make a few changes. The real thing is you make 560rwtq. That is STRONG for the street. You are rolling around in a mid to low 10 second car with the right track setup and a motivated driver. I would be happy with that.
560 rwtq is about all the torque a 442 is going to get short of boost or spray. If he dyno'd with much more torque, the dyno itself would have to be questioned. Personally, I think this shows the dyno is very honest. It's a nicely squared up motor that won't need to rev to perform.
Orange - if you do run it at the track, what's your tire plans? A good bias might be the trick.
Orange - if you do run it at the track, what's your tire plans? A good bias might be the trick.
What compression is it? I think those numbers are good as a 9" gobbles up some power... it needs way more cam to make more power than what it's doing. MSD Atomic ported intake or the new FAST LSXR would add 15-20rwhp.... Probably drives awesome with that cam though.
I have 441ci motor also that was for sale on here for a while and it didn't sell I'm guessing as it wasn't assembled and no power numbers proven. It is at my machinist getting the top end/cam assembled and will be engine stand dyno'd hopefully in next 30 days. ERL resleeved alum 5.3 with 4.190" bore, 4" LS7 crank/Ti rods, RaceTec lightweight 13:1 pistons, older WCCH AllPro 428cfm LS7 heads, AllPro single plane ported intake, 252/260 .714" lift LLSR Cammotion cam, Jesel rockers/lifters/PAC .750" dual springs, wet sump, GZ Motorsports vacuum pump. Hoping for 775-800 flywheel HP. Running it carbureted for easier break in. Will make a post on it once I have some numbers. Should make solid power from 4000-7500rpm
I have 441ci motor also that was for sale on here for a while and it didn't sell I'm guessing as it wasn't assembled and no power numbers proven. It is at my machinist getting the top end/cam assembled and will be engine stand dyno'd hopefully in next 30 days. ERL resleeved alum 5.3 with 4.190" bore, 4" LS7 crank/Ti rods, RaceTec lightweight 13:1 pistons, older WCCH AllPro 428cfm LS7 heads, AllPro single plane ported intake, 252/260 .714" lift LLSR Cammotion cam, Jesel rockers/lifters/PAC .750" dual springs, wet sump, GZ Motorsports vacuum pump. Hoping for 775-800 flywheel HP. Running it carbureted for easier break in. Will make a post on it once I have some numbers. Should make solid power from 4000-7500rpm
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Banned
Joined: Feb 2019
Posts: 513
Likes: 54
What compression is it? I think those numbers are good as a 9" gobbles up some power... it needs way more cam to make more power than what it's doing. MSD Atomic ported intake or the new FAST LSXR would add 15-20rwhp.... Probably drives awesome with that cam though.
I have 441ci motor also that was for sale on here for a while and it didn't sell I'm guessing as it wasn't assembled and no power numbers proven. It is at my machinist getting the top end/cam assembled and will be engine stand dyno'd hopefully in next 30 days. ERL resleeved alum 5.3 with 4.190" bore, 4" LS7 crank/Ti rods, RaceTec lightweight 13:1 pistons, older WCCH AllPro 428cfm LS7 heads, AllPro single plane ported intake, 252/260 .714" lift LLSR Cammotion cam, Jesel rockers/lifters/PAC .750" dual springs, wet sump, GZ Motorsports vacuum pump. Hoping for 775-800 flywheel HP. Running it carbureted for easier break in. Will make a post on it once I have some numbers. Should make solid power from 4000-7500rpm
I have 441ci motor also that was for sale on here for a while and it didn't sell I'm guessing as it wasn't assembled and no power numbers proven. It is at my machinist getting the top end/cam assembled and will be engine stand dyno'd hopefully in next 30 days. ERL resleeved alum 5.3 with 4.190" bore, 4" LS7 crank/Ti rods, RaceTec lightweight 13:1 pistons, older WCCH AllPro 428cfm LS7 heads, AllPro single plane ported intake, 252/260 .714" lift LLSR Cammotion cam, Jesel rockers/lifters/PAC .750" dual springs, wet sump, GZ Motorsports vacuum pump. Hoping for 775-800 flywheel HP. Running it carbureted for easier break in. Will make a post on it once I have some numbers. Should make solid power from 4000-7500rpm
Thread Starter
Joined: Mar 2003
Posts: 1,223
Likes: 2
From: Hamilton Ontario
Well funny I came across this and hadn't posted. The day I was to pick the car up tuner was setting up the idle in the parking lot. Rod went through the block. What a kick in the nuts. Had great plans on doing some track days. Now I'm chasing down a new short. The heads are fine. One bent valve.
TECH Apprentice
Joined: Apr 2016
Posts: 313
Likes: 16
From: Lincoln, NE
Ouch, if a cylinder went lean would that have caused the rod to say bye bye? Seems like from what I've read having a real good oil setup starting at the pan can get real picky on these bigger cube LS monsters.
Thread Starter
Joined: Mar 2003
Posts: 1,223
Likes: 2
From: Hamilton Ontario
So the block had just been honed to 4.130 to remove a score in the #7 sleeve. The original rods were reused. I can't remember the brand but they were the budget series that would have been were put in the motor 10 years ago but really only had maybe 12,000 miles on them and a dozen passes. The builder is highly respected and is a small two man shop that have been building race motors for years. I have heard of no complaints about their workmanship. I'm wondering if the hone weakened the cylinder wall enough to cause a failure. I probably will never know and after a few days of wanting to just burn the car to the ground I've decided to rebuild with a sleeved 5.3. I'll use the same heads. I know I know, I'm leaving HP on the table, I mean if in the meantime I see a set of larger cathedral heads I may go for them.
So the block had just been honed to 4.130 to remove a score in the #7 sleeve. The original rods were reused. I can't remember the brand but they were the budget series that would have been were put in the motor 10 years ago but really only had maybe 12,000 miles on them and a dozen passes. The builder is highly respected and is a small two man shop that have been building race motors for years. I have heard of no complaints about their workmanship. I'm wondering if the hone weakened the cylinder wall enough to cause a failure. I probably will never know and after a few days of wanting to just burn the car to the ground I've decided to rebuild with a sleeved 5.3. I'll use the same heads. I know I know, I'm leaving HP on the table, I mean if in the meantime I see a set of larger cathedral heads I may go for them.
but as stated already, with all the torque you made and still good horsepower, the right drag set up on the car would be very respectable as is.
TECH Apprentice
Joined: Jul 2020
Posts: 387
Likes: 172
Yikes! Sorry to hear of your issue. I have a fresh (350 mile) 440ci LS with the Mamo 265 heads and the thing rips. Similar cam as yours, too. 247/261 .623/.623 but running 1.8 rockers. Hopefully you're back up and running soon. 