What kind of results can I expect to get from an LT1 intake with an LT4 camshaft on an otherwise stock L98 (ie stock heads) as compared to a totally stock L98 as well as an LT1 L98 with stock camshaft? I will be upgrading the heads in the future, but that's just not in the budget at this time. I can afford to purchase an LT4 cam, or even an LT4 hotcam (they're the same price) and have that installed with my LT1 intake conversion. I guess my question is, do I upgrade intake and cam now, and heads next spring, or just install the intake for now, and do cam and heads in the spring?

 

The LT1 intake alone will give you moderate gains... it flows much better than TPI, especially on the top end.

The LT4 hotcam is not really suited to well for TPI becuase it makes power in the upper RPMs (althought many people use it with good results).

If you smell what I'm cooking.... an LT1 intake with an LT4 hotcam will give excellent gains and will work very well together. If you replace the heads later on, you will be even better off.

The moral of the story is.... LT1 intake/LT4 hotcam on an L98 is a great start to a powerful and streetable engine.

 

Man, I am up the same creek as you. I was just about to post a cam question when I saw this.
I have a new 383, miniram with afr190 heads, and I can not decide on a cam. I think I got it down to either the cc306 or the XE230/236. I also have a Nx kit that is adjustable from 50 to 200 that will be on her, but I am trying to have a strong N/A engine and still be able to spray when needed and to get some good times at the track.
Any help from any cam gurus would be helpfull.....
I did a search and came up with 15 gazillion topics, yes gazillion.

 

That's good to hear. Will the stock heads and valvetrain work with the LT4 hotcam though? The specs I've found are...

Stock specs 207/213 .415/.430 117
LT4 hotcam 218/228 .525/.525 112
LT4 cam 203/210 .476/.480 115

Is the stock valvetrain compatible with a .525 lift? Is this figure with a 1.5 or 1.6 rocker? I got the specs off the SDPC2000 site, but it didn't specify which ratio that was with. Will I have to change springs with the hotcam, or anything else? I know about the pin mod on the cam itself. That's not a problem. The other stuff will involve additional purchases. I seem to remember the stock springs only being good for about .480 or .490 lift. If that's so, would the LT4 cam work with the stock valvetrain? I really don't want to spend more money on valvetrain components that can just go towards a set of aftermarket heads (allowing me to get new heads even sooner)

 

I'd say go with that intake and cam and save for heads. I ported my L98 iron heads and am running the LT4 HC now and it runs pretty good. Rest of mods are in my sig.

I plan on going AFR or TF with a LT1 intake next spring. On my stock heads I juse used ALL intake style retainers and TPIS ZZ9 ($125) springs to handle the lift. Call TPIS... they're very helpful. The heads will handle that .525" lift then. As for that... the .525" is w/ 1.6:1 rockers. Its like .492" with 1.5:1's I believe.


*As for that 383 with AFRs and stuff... I'd say go with that cc306. I think I may switch to that when I get the heads/intake next year. I'd say high 11's are possibly with that cam/heads/intake. Especially with your 383.Well, thats all I can think of right now. Hope I helped someone! Later BTW-I have a friend who runs mid 11s with a LT1 motor/intake,ported LT1 heads, and the cc306 with a T56 and 4.10s. I don't believe your 383 would be ANYTHING behind his car. It should run that good.

 

Rocc - Go with the XE230/236 cam...You won't regret it. It has very good power uder the curve where as the cc306 you have to spin high to get the good power. I have the XE230/236 and it's very streetable and power peaks at about 6500 RPM.

 

Hey Markolc do you have the part number for the Xe cam?
I have heard alot of good things about that cam but most people are using it in a 350 and I was not sure if it or the cc306 would be better for a 383?? thats why I was hoping someone who is using it or has used it could let me know what they were running.
I was also looking at the zz-9x from TPiS. It sounds pretty good also.

 

jRaskel: The LT4 Hot cam has .525" lift with 1.6 rockers. With 1.5 rockers it is .492". If you go with the Hot Cam, I'd recommend the kit, with the springs, retainers, caps, etc. The CompCams Promagnum rockers are very nice and less expensive than the Crane golds or GM pieces. I know you don't want to spend much on the valve train, but when you start banging 6K RPM, you'll want your valve train to hold together.

Some of my mods:
LT1 intake
LT4 Hot Cam
Crane Gold 1.5 rockers
TFS TW G1 heads

 

Rocc - The XE cam is a custom grind cam. http://www.nu-tekmotorsports.com/ has this cam in stock. I didn't notice you had a 383 for some reason...I'd definately go with the CCXE 236/242 cam then. It'll be just as streetable as the 230/236 is on a 350.

 

Hey what is the lift on the 236/242 cam with 1.6rr's. That cam is pretty close to the cc306.

 

.556/.576 on a 112 LSA.

 

Thanks alot man, Have you seen or heard one of those cams in a 383? I would like to know if its pretty streetable or not. I would love to put that in my engine I just dont want to have to be in the 6500rpm range to make best HP. I want to rev that high but I would like to get good mid range torque also...Thanks for the help.

 

A friend has the XE236-242 in a 383 with miniram, ported afr 210's and 11.2 compression. He is running true duals dumping before the rear wheels, and it sounds kind of like a pro stock motor. He is only getting 9-10 inches of vacuum at idle.

Comp will custom grind a cam for you for $242 + $35 shipping. That's what I paid for mine. If you want a better idle and more vaccum, you could have it ground on a 114 lsa.