camshaft swap and advice plz

[patmckinneyracing]

Looking at doing a cam swap in my 350 sbc. Now that my bu isn't a daily driver, I want to put a bigger stick in it. Currently I am using this cam from summit http://www.summitracing.com/parts/SUM-1103/ . It is a fairly small cam that has served me well for the past 4 years that I have been driving the car. I want the car to continue to run on premium pump gas, just want more performance out of her. Here's what I'm looking for in a cam:

-Don't want to go over 500+lift
-Good powerband 1500-6000rpm something quick from the get go
- Was looking at summit brands because they're cheap and I have had good luck with mine so far

Here are the specs on the drivetrain:
-350 standard bore
- 202/160 iron heads
- Bosch water pump (v belt driven)
- edelbrock performer and edelbrock 650 carb
- flowtech headers with 2.5in flowmaster exhaust/ 2 1/4 past the mufflers
- 350 transmission with B&M shift kit (2000 stall)
- rebuilt 86' monte ss rear with auburn posi and yukon gears

I've got front and rear sway bars along with the two front braces underneath the core support. Cut S10 5660 moog springs up front with factory variable rate springs in the rear. Also has quick steer monte box and rebuilt steering components.

The goal here is to get into the high 11's or low 12's. I'm going to be driving primarily on the street and want to BTHO whatever may try and come at me (Vettes, firebirds, ricers). Just looking for suggestions and see what you guys are running your engines. Thanks.

 

[patmckinneyracing]

Been messing with camquest and the XE274H and 280H are giving me the best results so far. Both giving almost 455hp and 448 lb. torque. Anyone know anything about the voodoo cams or anything else similar to these two comp cams?

 

[SScamino]

look at the new voodoo cams, its what ive got in mine, my engine should be done around next month, the voodoo cams make more power than the xe line, and also dont have the noisy valve clatter, I have a voodoo 268 which is between the xe 268 and 274, but the two cams you have would be a perfect choice for the times you want on the track, though I have a question about your heads, I know the valve size but what about casting of the head? ex. are they vortec, double hump, what ever, that would be the major decider in cam choice.

 

[jrm81bu]

The voodoo line of cams was lunati's answer to comps extreme energy line. I was gonna recommend either one of those lines. I'd say you're pretty close to what I would have said on the cams. I would ditch that intake and go with at least a preformer rpm or maybe a victor jr. I'd also go with a bigger stall too, 3000+.
I don't think that will get you into the 11's but maybe mid to high 12's.

The next thing I would be looking at is the carb. Is the one you have a thunder series? Those are the only 650 edelbrocks, the performer series are 600's. Then maybe go with 2 1/2 all the way on the exhaust. And last get some aftermarket heads.

At least that's where i'd start.

 

[patmckinneyracing]

I'd be happy probably with mid 12's. The heads i'm not sure cause I'm over here in college and the car is at home. I'm pretty sure they're not double hump heads.

I don't want to go with a 3000 stall, IMO its too much for the street. I'll be driving this car more on the weekends on the street and with very little strip use. With the intake, can't i just mill out a small section to connect the two sides and still get the same effect as an rpm performer intake? I believe my carb is a performer series. I used it on camquest and the scenario was making the 450hp and 460lb. The main goal is to be one of the fastest cars on the street.

I know my dad runs a comp cam in his 440 and complains about the valvetrain chatter quite a bit.

 

[85 Cutlass Brougham]

It all depends on your compression ratio. If you want to use the XE274, I would honestly not do it if it is below a 10:1. You seem to want to street drive it, and assuming stock heads, the XE274 will not be a good match for them. When I did my sims for my cam, I used flow bench data I pulled off the internet for the heads I have to accurately model it. The heads I have are basically 2.02 fuelie heads with maybe a little better flow (World Products S/R Torquers). I also have a 9.5:1 compression ratio, which is about as high as you want on old style chambers and iron heads. The sim told me to use the XE262, and the XE268 actually lost a little power compared to the smaller cam. So, I would probably use the XE268 at most. Remember that you will always be happier with too little cam than too much. Will my car run 12's? Emphatically, NO. It will probably run 13's though. You do need to remember that their is a direct relationship between the camshaft and the dynamic compression of the engine. Notice I did not say compression ratio. This is important to remember because it affects may things in the way the engine performs. Also, you do not want a cam that is not well matched to your head flow.

 

[jrm81bu]

I don't want to go with a 3000 stall, IMO its too much for the street. I'll be driving this car more on the weekends on the street and with very little strip use. With the intake, can't i just mill out a small section to connect the two sides and still get the same effect as an rpm performer intake? I believe my carb is a performer series. I used it on camquest and the scenario was making the 450hp and 460lb.

I've ran a 3000 stall on the street, it was my daily driver for a few years. Never had any problems, just make sure you have a good transmission cooler. With the times you want to run and the power you are realistically going to make your gonna need a good launch, and to make sure you get it into its power range. As far as the intake, the performer rpm is still a dual plane like the performer. I'm sure the runners are slightly different and it flows better. The performer series carb is goes from a 600 to 750cfm, so you probably have the 600(1406). You will probably need to step it up.
It seems that you want to run into the 11's with an intake that isn't desighned to breathe past 5500rpm, heads that are questionable on the flow, a relativelly small cam, and a low stall. Now I'm not knocking the combo, should work really well on the street, but you're gonna need more to get the kinda numbers you're looking for. And I wouldn't rely too much on camquest.
I don't think my car would break into the 11's, realistically low 12's. That's with more power in a more usable range than what that camquest is telling you. And my torque comes in at about as low as an rpm that you can get.