pasky and I finished up his CC306 cam swap earlier today. After finishing it up, we went out and ran them a couple of times.

pasky's mods:
'95 LT1
Stock heads, intake, injectors, etc.
TB airfoil
CC306 cam
Proform 1.6 roller rockers
Cloyes double roller timing set
CVR electric water pump
SLP 1-5/8" headers with high-flow 3" exhaust
T-56 with 3.42 gears

TexasLT1's mods:
'95 LT1
LT4 conversion(heads, Hotcam, intake)
30# injectors
52 mm TB with airfoil
Proform 1.6 roller rockers
Hedman 1-5/8" headers with custom 2.5" y-pipe and Mccord 3" electric cutout
T-5 with 3.42 gears

We raced twice. On the second run, up to 130 mph, we were pacing each other exactly, with me only 1/2 car ahead. From 75-130, neither of us gained an inch.

What this means, for all of you LT1 swappers out there who want more performance on a budget, get the CC306 cam. I spent over $2000 total on my conversion, pasky spent about $500 and has the exact same performance I do. You can't say much more about the swap than that. And that is with totally stock heads except for upgraded springs. For an easy 12 second car, this is the way to go.

 

What kind of PCM tuning?


You cant really compair the 2. Hot cam and CC306 are two diff animals.

LT4 , Heads and Intake with a CC306 Tuned good will deff pull on a Stock heads and Intake LT1 with a CC306

 

That's the whole point. I have a relatively mild cam with better heads and intake, while he has an almost stock LT1 with a relatively big cam. The fact that he stayed that close to me says that much for the power of the cam.

And I can't compare the 2 cams? No **** an LT4 with the same cam is going to pull on a stock headed one. You're talking about a 50 cfm difference in head flow alone, not to mention larger throttle body and injectors, which you would need on a 306 cammed LT4. If I had that cam right now I would have an 11 second or very low 12 second car.

 

Does Pasky have a stock bottom end? What's his peak RPM? I'm doing the heads/delteq upgrade/30lb injectors/1 7/8 SLP's/3" exhaust/52mm/cai/3000 stall/performance A4...
Wonder what numbers I'd put down...it's been said, well, for an "emissions friendly" cam, that I'd be throwing down 380 horse at the wheels. If that's an "emissions" friendly cam, I wonder what the CC306 would give me...

 

Stock bottom end. I got a electric waterpump so I could run a double roller timing chain. When me and Texas put that thing on, that damn thing had barely any slack. You can rev to the moon with it. I shift at 6500. Also, I need 30# injectors for this cam, im not pulling as fast as I could up top I believe.

 

Pasky...shouldn't run the stock bottom end about 6k, so I've been told...I'm probably going to rebuilt my whole setup either way, so, shouldn't be an issue for me, although, it still might be possible that I keep it...not TOTALLY sure yet...

Also, your times seem about right for a relatively STOCK LT1...should be hitting much lower et's if you start doing some serious mods....I'm going all out on mine, hopeing to hit 400 or so RWhp and mid to low 12's (although, I probably will never take it to the track, lol)

 

Pfffffft. I don't care, if it craps out more of a reason to bore it over. If you check out camaroz28 you'll find the stock bottom end on an LT1 is quite stout. I don't liek to go by what people say too much. They told me this cam wasn't streetable and my brakes are fine and its plenty streetable.

 

Yeah, I've been lookin' on the site...they DO have guys spinnin' 7k for quite a long time w/o any problems...others that blow it up in a short while at 6k! Who knows, lol...

 

Yup, my motor is pretty stout...*shrug*

 

stock LT1's were only running 13.9's and couldn't hit a 109 trap speed going down hill on a cold day with a gail force tail wind. Besides, look at his 60'. That alone shows that his ET is not any where near indicative of the potential of the car.



*and that time was with a stock LT1 engine. Being in a non-power thirdgen makes a considerable difference.

 

4 sure!a set of lloyd elliot heads on there would be sweet,1-3/4 headers would help greatly as well.
good goin pasky!!

 

Guess what....I just blew a rod bearing yesterday . Time for a rebuild,

 

Are you serious?

 

LOL, yup, I think it had to do with the lifters, one got cocked in the lifter valley and wasn't oiling. And then.....*CLANK* *CLANK* *CLANK* *CLANK*.

I just talked to matt, he has a 350 shortblock ready to go with 15,000 miles on it, going to pick it up this weekend. Anyone know if I can just change the rods and pistons to make sure this damn thing can withstand the high revs (6700 rpm)?

Don't be afraid of a cc306. I took a chance, my block had 104k miles on it .

This is actually perfect for me, I can pull the engine out and check my clutch, and pretty up my wiring much easier now.

 

Anyone know if that will make the stock bottom end capable of high reving? Just the pistons and rings?

Its just going to be NA, few track runs here and there. probably 1 track run per 2 months.

 

Woot, its just 2 bent pushrods!!!

 

Id imagine if you upgraded the rods and pistons it should handle revs alot better. You might even get away with just upgrading the rod bolts..im admitedly not that familiar with the lt1 though

glad to heard it was just the pushrods..

 

With ANY hi reving engine put some good ARP rod bolts in. if your gona use the stock rods.

If you have the $$ A good crank and H beam rods. and some Light weight Forged pistons.

With 100+ K miles Im prob. go for a rebuild anyways.


I have 93k Miles on my LT1 and Im puting a Eagle stroker crank and Eagle H beams in it. some TRW LW Forged pistons and a cc306 with ported heads. MAYBE a Single turbo setup. (this is for my daily driver AWD S10 project) So I might leave it N/A and just shoot a 200shot.

 

Pasky...told ya! lol

My engine should be arriving within a few weeks...it's got under 50k miles on it, so I should be good to go...well, at least w/ the revs I'm lookin' at (around 6200)...I'm going to leave the whole bottom end stock...just do the top.

 

Actually, it wasn't the revs that screwed my pushrod (well, technically it was), it was that I just put stronger lifters in and the higher springs, these pushrods can't take that. The bottom end seems fine.

 

What lifters did you use? Comp R's? I'm just gonna get some GM standard ones w/ my stiffer springs, hardened pushrods, etc.

 

Speed Pro's. Which I hear are equivilent to Comp lifters. Im definatley picking a set up of hardened pushrods.

 

That should be all you need right? Or are you going to do a whole rebuild?

Just picking here, but there are alot of factors to consider when you guys ran your cars after your cam swap. How much do the cars weigh, computer tune, etc... That is good performance for cheap, dont get me wrong, but all things have to be equal.

Also, you guys gonna make it up to Ennis this year? We all need to meet up and do a LT1 vs LS1 in a thirdgen kinda thing. Maybe get in a magazine (GMHTP) or something.

 

Oh I know, but in reality are cars are in fact very similar.

Car Weights-
TexasLT1 - 3550 lbs race ready at HRP
Pasky - unknown, but original non-power V6 with LT1/T-56 swap, and about 60 lbs of crap in the back

Computer tunes
TexasLT1 - Bryan Herter at pcmforless.com with a few minor changes by myself
Pasky - Ion at madz28.com CC306 tune

This is the main reason we decided on a roll, to try and equalize things, such as taking away my traction advantage from my drag radials, driving skill due to not having to launch, etc.

I think we did a pretty good job of leveling the field and making it as equal as possible. Obviously this wasn't an end-all test of an LT4 converions versus the CC306 cam, but I think we both felt it was a very good indication of the power on tap with that cam.


*Edit* When is Ennis? I would love to go, but I highly doubt I'll be home on leave when it goes.

 

not only that, we both have a few bugs to work out on our vehicles. I got my pinion seal leaking, #1 cylinder wasn't firing and im bending pushrods right now (need a set of hardened), and need bigger injectors. Texas has a misfire and needs to change his wires. I'd say we are about dead even on power, I pull on him up top, he gets me from down low.

 

can you just send a lt1 obd2 computer to one of these guys and have it flashed for the setup?

im looking for someone right now to tune a lt1 project with the cc306 cam.

 

There's a local guy who lets the car shift at ~6700. Bottom end usually looks good but he has piston trouble when on a big shot.

 

Thats cool. I just have to mess with you LT1 guys.

Ennis (Texas Motorplex), is having a Super Chevy weekend in May, I'm going to try to make it, but thats a little far down the road. Should be alot of fun though.

http://www.texasmotorplex.com/cal/ca...=2005&Go=Go%21

 

Dang, can't make it if its in May. The earliest I'll have leave is like June 3rd

 

I personally think the LT4 conversion is over priced, especially how much perfromance you get out of it. For the same price you can get 400 RWHP out of a set of stock ported heads and a 230/236 cam. However since you have the LT4 conversion, when you put a bigger cam in it, and I'm sure you will , the thing should haul. Just my .02

 

Yes, so do I. But, I didn't buy the conversion as a kit, I already had the Hotcam, one of my heads got cracked and we "thought" I needed new heads, so we got the LT4's and the intake. At the time, it seemed like a good idea. Now, I wish I could have just had them ported out and gone with a bigger cam, but oh well.

Now, I'll get the LT4's ported out, get an even bigger cam, and shoot for 430 at the wheels.

 

sweet :hail:

 

when you have them ported send them to Lloyd Elliot over at camaroz28.com....he can get 280+ out of them with his stage 2...his stage 3 are at or above 300cfm.....that with a Gm847 like your looking at will be over 450 at the wheels...thats the way im going..
right now with my stock LT4's and my 224/230 im at 370 to the ground...thats 430 crank or so

Stage3 LT4's+847=:hail: :hail: :hail:....

 

That's exactly who I was planning on having do them. I post over there, just not on a regular basis, but he gets very good results. I know he can get 270 out of ported LT1's, I think 300 is pushing it for LT4's, but I know he can get close to that. Hopefully that will be my project next semester. It'll be nice to still run 12's at 5500' altitude I'm still undecided if I want to do the GM847, or wait and get his LE3 cam, he claims on LT1's the LE3 is good for about 10 more peak hp, but a little more under the curve everywhere. Only problem is he charges something like $300+ for just the cam if you don't get it with a set of his heads. Which is understandable since its a custom grind. I'm most likely just going to go with the 847 this summer and keep it once I get the LE LT4's.

One other thing to consider is I'm betting that 370 was on a Dynojet? That would equal to about 340-350 on a Mustang, which sounds about right, since as far as I know that's the only major difference between our engines.


*Edit* Forgot yours was carbed. I'm sure that helps out on airflow.

 

hes gotton as much as 280 out of LT1's..and i remeber a while back he got a little above 300 out of LT4's...like 304 or 308....hi 290's is the norm though, and thats enough air for 600+ ponies....im thinking about going with his LE3 over the 847 becasue the 847 is 250 bucks and his LE3 is custom ground to his heads so that 50 bucks would be worth not only the 10 peak, but that power under the curve would be even better...
it was actually 373 at the wheels and it was pretty lean (14.2) as the jets in the carb are stock..so with some real tuning on it its got another 10-15 RWHP in it...the carb intake on a stock motor makes 20 more lb feet under 3 grand and 20-25Hp above 5 grand..so it defeinetly makes more power then EFI...when i had the stock cam in it, it was trapping 109, and im expecting 117-120 when i take it back...

yes it was on a dynojet

 

good luck with that

 

im an optimist


for real though, ive beat some fast cars on the street that trapped 115....i know it isnt concrete but it should a good indication...i lost a carlength to a LS1 with home ported 5.3 heads long tube headers and a hotcam to 120..so i know its got atleast 117 in it

 

What's up pasky and texas? how hard was it to swap the cam and adjust timeing and aline the opti? i'm wanting to put an lt4 cam or now that i've read some of this post the cc306 cam. what all parts did you guys change like rockers, lifters,valve springs?

 

z91, doing alright, just miss the car. It sucks being at school by having my car back home under cover in the shop.

Definitely go for the cam swap. My suggestion, Comp 987 valve springs, Titanium locks and retainers, Comp Hardened pushrods and guideplates, Comp 1.6 rockers, new timing set (the Cloyes Double Roller is awesome, but will require switching to an electric waterpump). New stock lifters will be fine, this cam isn't radical enough and the springs don't have high enough rates to require something like Comp R lifters. As far as the actually assembly, its not difficult at all. We did pasky's with the engine in the car, didn't take too long at all. Just watch the cam bearings and make sure the opti goes on right. you'll know when it does, as it will seat all the way very easily, it doesn't take any force. If you have to try and force it down to fully seat it, pull it back off and do it again.