Hot Rod article (camshaft question)
Thread Starter
Teching In
Joined: Oct 2006
Posts: 22
Likes: 1
Hot Rod article (camshaft question) If you guys recall, there was an article in Hot Rod magazine (around 1 year ago) titled "LS1 cookbook", where they took a stock GMPP LS1 crate engine and got 530 hp out of it.
I have since lost the article, but I wrote down the part number of the camshaft they used. The number I have written down is the Comp Cams' XR289HR. However, I cannot find this cam, even if I Google it or check on Comp Cams' website. Just want to make sure I wrote this down correctly. Does the XR289HR even exist? Does anyone have the article to verify this for me?
Any help is greatly appreciated.
I have since lost the article, but I wrote down the part number of the camshaft they used. The number I have written down is the Comp Cams' XR289HR. However, I cannot find this cam, even if I Google it or check on Comp Cams' website. Just want to make sure I wrote this down correctly. Does the XR289HR even exist? Does anyone have the article to verify this for me?
Any help is greatly appreciated.
Did you try the hotrodding web site, the tech article section usually archives the articles. I remember seeing something like this recently when I was on their web site, and there is a good article by David Vizard on there as well that is worth reading.
Thread Starter
Teching In
Joined: Oct 2006
Posts: 22
Likes: 1
Yeah, I tried looking through the website's tech article archives, but I couldn't seem to find it. I figured surely someone on this site had that issue of Hot Rod and could maybe verify the part #'s for me.
These are the 2 Comp cams in the article:
1-xtreme rpm/ XR269HR/ Part# 54-414-11
2-xtreme xe-r/ XER281HR/ Part# 54-446-11
Hope that helps, if you need more info like, duration, lift. etc. Just let me know. I had cut that article out and had it on file.
1-xtreme rpm/ XR269HR/ Part# 54-414-11
2-xtreme xe-r/ XER281HR/ Part# 54-446-11
Hope that helps, if you need more info like, duration, lift. etc. Just let me know. I had cut that article out and had it on file.
Originally Posted by Caribe
These are the 2 Comp cams in the article:
1-xtreme rpm/ XR269HR/ Part# 54-414-11
2-xtreme xe-r/ XER281HR/ Part# 54-446-11
Hope that helps, if you need more info like, duration, lift. etc. Just let me know. I had cut that article out and had it on file.
1-xtreme rpm/ XR269HR/ Part# 54-414-11
2-xtreme xe-r/ XER281HR/ Part# 54-446-11
Hope that helps, if you need more info like, duration, lift. etc. Just let me know. I had cut that article out and had it on file.
...or just a scanned copy of the article would do just fine
Trending Topics
Jan. 2006
XR269HR-216/220(.050) LSA 114 lift rocker 1.85 .572/.579
XER281HR-232/234(.050) LSA 112 lift rocker 1.75 .613/.616
XR269HR-216/220(.050) LSA 114 lift rocker 1.85 .572/.579
XER281HR-232/234(.050) LSA 112 lift rocker 1.75 .613/.616
Last edited by Caribe; Oct 18, 2006 at 10:46 AM.
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Teching In
Joined: Oct 2006
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Thanks for that info, Caribe! No wonder I couldn't find that cam; I guess I wrote down the number incorrectly. I am interested in the milder cam (the XR269HR). If I recall, they used Comp Cams' valvesprings, pushrods, 1.85 rocker arms, and retainers with this particular cam, right? Anything else I should get?
Also, this appears to be a very mild cam for the LS1. Do you guys think all of the upgraded valvetrain components they used are absolutely necessary?
Also, this appears to be a very mild cam for the LS1. Do you guys think all of the upgraded valvetrain components they used are absolutely necessary?
On The Tree
Joined: May 2004
Posts: 166
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I just got done reading that article and it seems as though they were testing different cams than the ones above.
Also, why in the world would someone writing an article about cams not tune the spark and fuel when switching cams out? That article was almost worthless since they coulnd't bump the rev limiter up or change fuel/spark for the bigger cams.
It would have been a great article if they reprogrammed the computer for each cam.
Also, why in the world would someone writing an article about cams not tune the spark and fuel when switching cams out? That article was almost worthless since they coulnd't bump the rev limiter up or change fuel/spark for the bigger cams.
It would have been a great article if they reprogrammed the computer for each cam.
I was checking out that article just last night. I thought it was kind of a crappy article the whole way around. They installed stuff in kinda the wrong order and did not tune for any changes. Sorry, did'nt really contribute just thought it was a heck of a coincidence.
TECH Resident
Joined: Jan 2006
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From: harrisburg, pa
if i recall correctly they were dynoing the engine at above 400hp stock. So either they were advertising for someone or those are flywheel numbers which even seem high for that which other than the lsa, seems like a low-medium size cam for a 346
The article states is was 407 at the flywheel, which was achieved without all the factory emissions components, through headers, and using different ratings than GM's SAE standard. Also, the F-body LS1 does carry a 320 hp rating, but 350 is more like it. That's what the 'vette LS1 is anyway, and there isn't much different aside from vehicle specific intake and exhaust differences. 400 gross hp seems about right.
+1 on the lack of tuning for each cam in the article though. Good results, but could have been even better if at least the rev limit had been raised.
+1 on the lack of tuning for each cam in the article though. Good results, but could have been even better if at least the rev limit had been raised.
Originally Posted by eric_the_Jew
Thanks for that info, Caribe! No wonder I couldn't find that cam; I guess I wrote down the number incorrectly. I am interested in the milder cam (the XR269HR). If I recall, they used Comp Cams' valvesprings, pushrods, 1.85 rocker arms, and retainers with this particular cam, right? Anything else I should get?
Also, this appears to be a very mild cam for the LS1. Do you guys think all of the upgraded valvetrain components they used are absolutely necessary?
Also, this appears to be a very mild cam for the LS1. Do you guys think all of the upgraded valvetrain components they used are absolutely necessary?
