I HAVE A 89 CAMARO IROC TPI 5.0 WILL A LT4 HOT CAM FIT AND WORK WITH THIS CAR? ARE THERE ANY CRAZY MODS THAT NEED TO BE DONE TO DO IT.

 

*EDIT*

....I wanted to edit this post. Until we're sure what WILL and WILL NOT, work, there's no need for potential mis-information floating around. Dyno Don seems to think it won't. I KNOW Brisk is doing it, but maybe he made mods that I'm unaware of.

-Boob

 

You've got to be kidding.
That cam will never clear in a 305.
Not enough retainer to seal clearance.
It will also run like crap without a tune.

The maximum lift for 305 heads is .460
The LT4 hot cam is .492 w/1.5 rockers .525 w/1.6

Brisk is not using LB9 heads.
Read his post again.

 

I ran the cam in my sig just fine. I needed a tune, yes. But It will work.

 

OK, since I don't know exactly what needs to be done, I shouldn't have started explaining that it will work. I DID however confirm with Brisk that he IS running a Hotcam with the LB9/305. He mentioned that for the most part it was tuning issues. He said it wouldn't stay running without a tune and IAC adjustment.

My advice would be to look Brisk up and send him a PM.

 

The LT4 Hotcam will work in a 305, been there done that. Abubaca is right on saying you need the 1.6 roller rockers to get the advertised lift, and new valve springs are a nessessity.

I bought the LT4 Hotcam kit which included; cam, roller rockers, springs, locks, retainers, seats, etc for about $500 from Summit Racing. May as well change valve seals while your in there too.

When I did this to my car I also installed new aluminum heads and headers to take full advantage of the new power and since I had to take that stuff off anyway, might as well replace it with something better. If your keeping your stock heads, now is an ideal time to clean them up and port them. Screw in studs would be a good idea aswell.

The car ran decently without a custom prom, but it had stalling issues with my T5. If your auto it may not be as bad, but I was stalling each time I pushed in the clutch. Resetting the IAC was a big part of making the car run better and really helped with the stalling problem, while still running the stock chip.

I ran the stock chip for a couple months while I learned how to tune and burn my own proms and waited for the equipment to arrive in the mail. Every day the computer 'learned more' and it got marginally better and was 'daily driveable', however there is no replacement for a custom prom.

What did the mods do? I gained a lot more midrange and a ton of top end at the expense of loosing some bottom end torque, which is nothing for a manual car. You can feel the power band kick in around 2200 rpm and keep going as high as your wiling to rev (advertised as 1500rpm for a 5.7L).

Check my vbGarge for more details, and check this video for a sound clip; http://video.google.ca/videoplay?doc...99349&hl=en-CA

If you have any other questions, comments, or concerns.. just ask!

 

what kind of hp output did you have with that setup??

 

I'm still running that setup now, but doing upgrades once spring has sprung.

As for HP numbers, not sure. Never been to a track or dyno, butt-o-meter is the only thing I know.

 

do you think it will work with the stock heads? also, do you know what program you have on the prom. I was told by my prom guy that a LT4 is too much cam for the 5.0. I should look at the LT1. I will get almost the same h.p gains as some of the high cost cams out there for the 5.0. so my question is will it really work or do you have to be a car computer and car genuis to make mods. to make it possible. OR IS THERE A CAM OUT THERE THAT IS HIGHLY RECOMENDED FOR THE 5.0 TPI. THANKS jcsereiko

 

i would look around at other cams too. lunati and comp and crane make alot of hydrulic rollers. from what i've heard any cam change in those motors will make the computer go crazy. don't look at lift. look at everything else. lift means nothing.

 

uumm, not quite. it may not mean as much but not nothing.

63-08-302-8 Comp Cams 264 Hydraulic Roller Camshaft, 210 / 220, .480 / .480 112 LSA, For factory roller cam engines with Tuned Port Injection and modified computer.

> http://thunderracing.com/catalog/?ac...&vid=6&pcid=51 <

and btw if you go with the hot cam you'll need to michine the heads for larger od springs. stock od for your heads is 1.255. that cam should be great for your 305 and a little easier on your ECM than the hot cam. try pcmforless.com for a custom prom.

 

the LT4 isnt a bad choice for a budget setup...but it has lazy ramps and a rough idle since its a old tech grind. there are better choices out there

LT1 cam is not bad but still mild. but my buddies truck goes 13.5's at 98 with vortec heads, lt1 cam with 750 carb and edelbrock vortec manifold. thats a solid 350hp. pretty good for that small cam and just under 10 to one compression. TPI wont see the power tho as it chokes the motor. for a 5.0 tho, a LT1 cam would work well for a very cheap cost...like 25 bucks for a cam. some guys give them away for free!!

if your gonna go thru the trouble tho, i'd just do it right and get a nice aftermarket grind as they feature better lobes which will help make better power across the board

 

Well do what you want. But BOTH Brisk and I have done the cam swaps. Like I said Mines in my sig. And I have the part #'s I used.
My lil 305 runs really strong. And sounds just as mean. Once I get my tires spinning, I can smoke them all the way through 1st and most of 2nd gear.
And I still have my stock heads. I didnt take them off. I had the tools and a big air compressor to swap my springs and my valve seals without taking off the heads.
My cam alone was $230.00, I used my stock lifters.
Sure a LT1 cam will work. I just figured, why go through all the trouble for a little bit more lift. I went as big as I could with what I had. Thats why I chose the Crane cam.

 

Ok w/ all that being said about using it w/ a 305, how does it perform w/ a L98? What needs to be done to make it work w/ a L98?

 

It doesnt work with stock heads and valve springs. Do a search for LT4 Hot cam and you'll find all the answers from the previous times this has been asked. Its a very common camshaft for TPI.