GM L31HD and cam choice

[Supercharged111]

No the hot cam is the same as the ram jet.

I did not catch this before. Ramjet cam is the 395 marine cam, nowhere near what the LT4 Hotcam is. 2 completely different animals.

 

[shovelbill]

interesting........this is the cam that GM put in the HT383E....and i really like my 383.

https://www.gmperformancemotor.com/parts/14097395.html

PRODUCT DETAILS

• Hydraulic roller design
• Duration @ .050" Lift( Deg): Intake: 196 / Exhaust: 206
• Maximum Lift (in) W/ 1.5 Rocker: Intake: .431 / Exhaust: .451
• Lobe Centerline ( deg): 119
• Technical Notes: For the HT383 truck engine with 1.5 rockers

this is the same cam that is in the HT383.......at least that's what i just got from GM's website

https://www.gmperformancemotor.com/parts/19355720.html

 

[Supercharged111]

Yup, marine = HT383E = Ramjet = 395. Does NOT = LTanything.

 

[shovelbill]

i was just looking at the lobe separation that GM states.....119

 

[Stokes1114]

Yes ram jet is same as marine, hot cam is lt series. Misspoke.
If interested I have a brand new in sealed package comp cam 08-500-8 with comp lifters that I could part with. It would be a better torque cam than anything we've discussed so far. Even have their matching spring set as well.(bc it's crazy to run stock springs)

 

[Stokes1114]

It's actually 109

 

[rangrayy]

Yes ram jet is same as marine, hot cam is lt series. Misspoke.
If interested I have a brand new in sealed package comp cam 08-500-8 with comp lifters that I could part with. It would be a better torque cam than anything we've discussed so far. Even have their matching spring set as well.(bc it's crazy to run stock springs)

That cam is one of the options that came up on the cam quest program from CompCams website. Grind #XR258HR. Won’t their matching spring set need to have the heads machined? Their notes section mentions it I believe. I might be interested in it, I will let you know for sure in a few days.

 

[toomanyhobbies]

For what it's worth, I just did this with my '98 2-door but I got mine from Karl Chevrolet which I think was $50 cheaper than your price and I got a $50 gift card to put toward my restoration project. I went with the #120 Alex's springs and retainers and the ZZ4 cam. I did a lot of research beforehand and that cam seemed like the best option.

I haven't had it tuned yet it's at the paint shop now. Tune is next stop.

 

[rangrayy]

For what it's worth, I just did this with my '98 2-door but I got mine from Karl Chevrolet which I think was $50 cheaper than your price and I got a $50 gift card to put toward my restoration project. I went with the #120 Alex's springs and retainers and the ZZ4 cam. I did a lot of research beforehand and that cam seemed like the best option.

I haven't had it tuned yet it's at the paint shop now. Tune is next stop.

What are the specs on the ZZ4 cam and what exam are you using the 411 or black box?

 

[toomanyhobbies]

ZZ4 cam specs here...

Duration @ 0.050" Lift: 208/221
Lift: .474"/.510"
Lobe Separation: 112

I am somewhat of a neophyte and I don't know what a 411 is so I guess the answer is no. My truck is OBDII that much I know.