O.K. guys, I'm thinking about being a little different and buying a set of heads, and getting them ported by Lloyd Elliot. The thing is, I'm thinking about keeping the stock cam. At this point, please DO NOT try to talk me into doing a cam. I have my reasons for staying with the stock bottom end.

I'm wondering if anyone has had a bolt on LT1 and then have only done heads without changing the cam. I do have a fresh valvetrain on the engine now with 1.6 RR's that I would swap into the new heads.

I'm extremely conservative with my mods, and want my car to drive as smooth as stock. Right now, I'm at about 300 rwhp and 330 rwtq. Has anyone dynoed a M6 bolt-on LT1 with ported heads and stock cam? I'm thinking that 330 rwhp should be attainable.

I can always add a cam later if I choose to, so please, please don't talk cams. That's not the point of this post. I've talked cams enough to know what I want to do if I choose a cam.

Thanks, I'll be interested to hear the responses.

Dan

 

I'm currently wondering the same thing! My thought however is that the heads you/we would be getting ported would have to done to work best with the stock cam profile to attain the highest gain. I would think that bolting on a set of wildly ported heads might net us a lot smaller gain than properly ported for the stock cam. My concern is that I would need to get the heads ported again to match which ever cam I choose to go with in the future. I'm also interested to hear from the more experianced members.

 

Ever thought about getting a used supercharger set-up. You could have the head-unit refurbished for pretty cheap. Then the car would be stock performing until you got on it. I'm not sure but I believe if you run low boost the motor should be fine.

 

From what ive heard stock cam and ported heads is worthless. One guy on here tried it awhile back and didnt gain a thing. The stock heads flow well enough to make good power with a bigger cam.

I know you dont want a cam but honestly a cam swap would be much eaiser and cheaper than swaping in some ported heads. You can get custom cams that are small and would drive like stock but make much more power.

 

I thought I remember a bolt-on guy who had only heads done and stock cam, and was putting down some decent numbers (similar to hotcam with stock heads). I can't find the post though. It's been a while. That's why I wanted to ask the question.

...and honestly, I don't want to discuss cams other than the stock one. I know you are trying to help, and I know I can go with a different cam, but that's out of the topic for this particular post. I know what cam I would go with if I did a cam instead.

Dan

 

Yeah, there are probably changes to how they would perform the porting if I was running lower lift, due to the stock cam and 1.6 RR's. That's not my expertise though, so I'd have to let the heads porting guys chime in.

Dan

 

Yes, I've thought of SC'ing the car too, but it's more than I want to spend right now, and I'm too concerned about damage, even with low boost (5-6 psi). I may do that in the future though.

Dan

 

if you have head work done, then is it still a "bolt-on" car? I don't think so. besides, there are more cost effective things that can be done to help you out.

 

That's why I said bolt-on LT1 plus heads. It was the best way I could think of to describe what I'm thinking of doing. There's no short term for it, like heads/cam, bolt-on, SC, nitrous... I know that once the heads are done, it couldn't be called bolt on any more.

I'm not looking for cost effective. If that were the case, I would get nitrous and a 100 shot.

I'm simply wondering if anyone has done what I've asked about, and what the results were.

Dan

 

take a look at this thread.

http://web.camaross.com/forums/showthread.php?t=396017

 

Just curious.. but what are your reasons for sticking with the stock cam?

High miles?

 

I remember on here years ago some guy saying he put down 320-330ish with ported heads, stock cam and bolt ons.

 

I have that exact setup in my z full exhaust bolt on's, ported and polished heads and a 150 shot stock cam, no track times but the car fills the same as my full bolt on ta with untouched heads, the car had the heads worked when I got it

 

I would tend to believe that more can be made then that though. Roadtrip puts down like 327 RWHP, all bolt ons. So i think that with a nice set of ported heads at least a 10-15 HP gain should be achieved. I think you would want to go with 1.7's if you are gonna port the heads, at least it will take advantage of the increased flow in the higher lift ranges. Your idea kinda intrigues me, i am wondering how much benefit this would have....just not enough to try it myself tho. If you do it, please let us know how it works out for you.

 

Here is a little brake down of how it happened.

1. Already had the TA and then purchased a 01 SS
2. Put heads and a XE 230/236 cam in the TA.
3. Started trying to teach my self to tune the car. not having any luck..(I'm really laze)
4. Totaled the SS here are some pic's http://www.dfwls1.com/forums/showthr...&threadid=2179
5. Needed a car really fast so I could make my 32-mile (one way) drive to school. So I swapped the cam over the weekend and went on my way.
6. Purchased a 93 Z and wasting way too much $$$$.

How much the heads really help I don't know but my car pulls a lot harder up top. According to the dyno sheet on this set up it made more than 300 rwhp above 5100rpm and held it till they let off at 6400rpm. Please remember my sheet is way craze sense the knock retard was going craze. One of these days I will get it fixed and see what it really will do. I added the vig 3200 sense then so who knows what it will put down now.

This is my experiance... please send $$$ and I will get it dyno tuned...LOL no really.