Which Cam for my mods ???
Feb 24, 2015 | 12:30 PM
#21
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Teching In
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Who in Houston?
hell, i may just do the longtube headers, black bear tune it, and upgrade the spider injector and be done! lol
Feb 26, 2015 | 01:40 PM
#23
Staging Lane
Joined: Jan 2014
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From: Nebraska
I used a 260HR in a 3/4 ton 1975 Chevy. It was wicked off the line. It had a performer intake, Carter Carb, and headers/duals, 4.11 gears. Few factory cars could keep up with it from light to light.
The XFI version will only be better.
The XFI version will only be better.
Feb 27, 2015 | 03:07 PM
#24
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That's good to know, That is the one i am thinking on!!
Feb 28, 2015 | 11:48 AM
#25
Staging Lane
Joined: Jan 2014
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From: Nebraska
Feb 28, 2015 | 12:07 PM
#26
Staging Lane
Joined: Jan 2014
Posts: 57
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From: Nebraska
Uh-oh... This article indicates you might be limited to a .460 lift cam with your stock Vortec heads!
Vortec Cylinder Heads: The Definitive Guide - NastyZ28.com
For roughly $900 you can get a pair of modified Vortec heads from sdparts.com that can handle upto .525 lift. The ramps in the heads are designed to work with lifts of .300 to .500 so you don't want too much more than .500 anyway.
Vortec Cylinder Heads: The Definitive Guide - NastyZ28.com
For roughly $900 you can get a pair of modified Vortec heads from sdparts.com that can handle upto .525 lift. The ramps in the heads are designed to work with lifts of .300 to .500 so you don't want too much more than .500 anyway.
Feb 28, 2015 | 01:34 PM
#27
Staging Lane
Joined: Jan 2014
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From: Nebraska
This spring/retainer kit claims to give .550 lift clearance for $90 on unmachined vortec heads
Vortec Head Spring/Retainer Kit - Straub Technologies
You wouldn't need to take the heads off to do a spring replacement.
It would be best if you found something like this from one of the sponsors. I just googled and posted the first thing that might work for you.
Vortec Head Spring/Retainer Kit - Straub Technologies
You wouldn't need to take the heads off to do a spring replacement.
It would be best if you found something like this from one of the sponsors. I just googled and posted the first thing that might work for you.
Last edited by kelobro; Feb 28, 2015 at 02:07 PM.
Feb 28, 2015 | 03:24 PM
#28
Staging Lane
Joined: Jan 2014
Posts: 57
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From: Nebraska
For any cam, you should upgrade your springs. Make sure you already have roller lifters, get some if you don't. upgrade your pushrods too. I would buy roller rockers as well. If you go with the TPI intake, and an X4258HR which should work with stock valve retainer to guide clearance, Camquest claims your dyno results will look something like:
https://kelobropublic.shutterfly.com/pictures/9
The X4260R actually produces less torque
https://kelobropublic.shutterfly.com/pictures/9
The X4260R actually produces less torque
Feb 28, 2015 | 06:22 PM
#29
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Teching In
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This spring/retainer kit claims to give .550 lift clearance for $90 on unmachined vortec heads
Vortec Head Spring/Retainer Kit - Straub Technologies
You wouldn't need to take the heads off to do a spring replacement.
It would be best if you found something like this from one of the sponsors. I just googled and posted the first thing that might work for you.
Vortec Head Spring/Retainer Kit - Straub Technologies
You wouldn't need to take the heads off to do a spring replacement.
It would be best if you found something like this from one of the sponsors. I just googled and posted the first thing that might work for you.
i'm liking this idea, this seems the way to go! i'm still tossing up the idea between the LT4 HotCam kit or the XFI 260 HR13...i'm not taking this truck to the track or nuttin. just want alittle slam ya into tha seat with a good choppy idle
Feb 28, 2015 | 06:25 PM
#30
Thread Starter
Teching In
Joined: Feb 2015
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For any cam, you should upgrade your springs. Make sure you already have roller lifters, get some if you don't. upgrade your pushrods too. I would buy roller rockers as well. If you go with the TPI intake, and an X4258HR which should work with stock valve retainer to guide clearance, Camquest claims your dyno results will look something like:
https://kelobropublic.shutterfly.com/pictures/9
The X4260R actually produces less torque
https://kelobropublic.shutterfly.com/pictures/9
The X4260R actually produces less torque
I do plan on upgrading everything. course the lt4 kit comes with all your goodie but rods... you've been extremely helpful..thanks buddy