1970 LT-1 Camshaft 370hp solid lifters
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
If you really have to use a mechanical flat lifter cam I have built a few of them using the crane cams 113841
Far superior to the oem or so called 30/30 cam
I also recommend modern springs with chromoly retailers trash can the heavy rotaters and spring cups
I've also used roller tip 1.6 ratio in the past
Far superior to the oem or so called 30/30 cam
I also recommend modern springs with chromoly retailers trash can the heavy rotaters and spring cups
I've also used roller tip 1.6 ratio in the past
Is my vette stock?? HAHA
Joined: Oct 2015
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
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Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I've said it in the past, but it is really kind of dumb to use nearly 50 year old cam designs. They were limited by spring technology back then. So the lobes had very little "Area under the curve" very mild lobes.
You really need to buy a cam and kit. cam, lifters, springs, locks, retainers. I recommend 10 degree locks.
lots of stuff on Ebay is not a good deal, it is often a guy just marking up stuff to make a buck.
You would have to talk to the summit tech person to get all the other kit parts.
https://www.summitracing.com/parts/crn-113841
You really need to buy a cam and kit. cam, lifters, springs, locks, retainers. I recommend 10 degree locks.
lots of stuff on Ebay is not a good deal, it is often a guy just marking up stuff to make a buck.
You would have to talk to the summit tech person to get all the other kit parts.
https://www.summitracing.com/parts/crn-113841
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
You need to find a NOS cam and lifters from someone. The stuff today is not the same material that was used originally.
I understand the nostalgia part of having this cam but I agree with GKull 100%. There has been leaps and bounds made since 1970. A good hyd roller or solid roller in this application will run circles around the old stuff.
I understand the nostalgia part of having this cam but I agree with GKull 100%. There has been leaps and bounds made since 1970. A good hyd roller or solid roller in this application will run circles around the old stuff.
Burning Brakes
Joined: Aug 2007
Posts: 897
Likes: 246
From: Green Valley Ca
You need to find a NOS cam and lifters from someone. The stuff today is not the same material that was used originally.
I understand the nostalgia part of having this cam but I agree with GKull 100%. There has been leaps and bounds made since 1970. A good hyd roller or solid roller in this application will run circles around the old stuff.
I understand the nostalgia part of having this cam but I agree with GKull 100%. There has been leaps and bounds made since 1970. A good hyd roller or solid roller in this application will run circles around the old stuff.
Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
That's a BIG power limiter. Back in the day, even with the stock heads and cam, bolting on a set of longtubes made a helluva difference on my avatar car- with the LT-1.
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Joined: May 2005
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From: Millington Illinois
St. Jude Donor '08-'09
This is a real 1970 LT1. I would build it back totally stock. Proper springs, break in and EDM lifters will go a long ways toward a long life. This is why I linked the above parts.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Real LT1's don't really run nice or produce lots of power like a modern even solid cam and springs can. I'd rather have something that ran nice.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Based on the stock head flow numbers the heads are capable of making 425HP in stock form. Since HP is a calculation and we don't measure it we need rpm. Depending on where you wanted to make peak power, rpm, would determine the amount. From my experience putting a modern day hyd roller in the engine will gain about 40HP, but the biggest difference will be width of powerband and quickness to rpm.
Safety Car
Joined: Nov 2008
Posts: 3,726
Likes: 558
From: Seattle Washington
In todays world most products are made to order. In other words they don't keep a stock of parts on a shelf sitting in a where house to be taxed by uncle Sam. They just keep Blanks and when a Cam is ordered its placed in a CNC machine and ground to Spec. Any major Cam Grinder should have the Specs for a LT-1, and should be able make one to order. I see most of the above are leaning towards going to a more modern Cam design. I'm on the fence on this one as well as my next project is a restoration back to original. But I also know that a judging team has no way to Judge a Camshaft.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
That's just about what I lost on both my '69 Vette and my avatar car. That tells me they're working. Both of my cams have remained healthy for many years with them.
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
I understand the desire to "build it correctly (original)", but like many others have said (hi George!), it really is old technology.
I've built engines with the Duntov cam and they sound great, run well and the customers were happy.
For my own stuff, I want it to run on pump gas and perform well. For example, my BOSS 302 original solid lifter cam performed like a 2 stroke motorcycle, nothing up to 3200 rpm, and then hang on! I swapped in a Chet Herbert dual duration solid stick and gained good lower end performance, a broad power band that pulls to 7K, and runs on pump 93 octane on all but the hottest days.
I'll do something similar with the 427 for my '69.
Hans
I've built engines with the Duntov cam and they sound great, run well and the customers were happy.
For my own stuff, I want it to run on pump gas and perform well. For example, my BOSS 302 original solid lifter cam performed like a 2 stroke motorcycle, nothing up to 3200 rpm, and then hang on! I swapped in a Chet Herbert dual duration solid stick and gained good lower end performance, a broad power band that pulls to 7K, and runs on pump 93 octane on all but the hottest days.
I'll do something similar with the 427 for my '69.
Hans
Last edited by Wrencher; Jan 14, 2017 at 01:46 PM.
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
http://www.camaros.net/forums/18-eng...dyno-test.html
Check out the average HP and Torque on this correct LT1. They do need headers but for 50 year old tech it is solid. Not a good build for a 3:08 with a auto and factory convertor but a real fun 4:11 4 speed build.
http://www.camaros.net/forums/18-eng...dyno-test.html
Check out the average HP and Torque on this correct LT1. They do need headers but for 50 year old tech it is solid. Not a good build for a 3:08 with a auto and factory convertor but a real fun 4:11 4 speed build.
http://www.camaros.net/forums/18-eng...dyno-test.html